Title of Invention	"AN IMPROVED FIRE TENDER FOR HIGH RISE FIRE FIGHTING AND RESCUE OPERATION"
Abstract	The main object of the present invention therefore, is to provide a fire tender which can enter narrow roads and congested areas for high rise fire fighting and rescue operation. This and other objects of the present invention are achieved by providing a hydraulically operated retractable elevated platform which can rise upto a height of about 27 - 30 feet shooting water / foam under pressure upto a height of three storeys maintaining the center of gravity.

Title of Invention

"AN IMPROVED FIRE TENDER FOR HIGH RISE FIRE FIGHTING AND RESCUE OPERATION"

Abstract

The main object of the present invention therefore, is to provide a fire tender which can enter narrow roads and congested areas for high rise fire fighting and rescue operation. This and other objects of the present invention are achieved by providing a hydraulically operated retractable elevated platform which can rise upto a height of about 27 - 30 feet shooting water / foam under pressure upto a height of three storeys maintaining the center of gravity.

Full Text	-2- FIELD OF APPLICATION The present invention relates to an improved fire tender for high rise fire fighting and rescue operation. In particular, it relates to a hydraulic platform mounted fire tender for multistorey fire fighting and rescue operation in multistoried buildings located on narrow roads and congested areas. BACKGROUND OF THE INVENTION Fire tenders are available to fight fire with various extinguishing media. Some of these fire tenders are also provided with separate high-rise platforms used for rescue operations along with separate supply of extinguishing media for fire fighting. Such equipment however, cannot enter narrow lanes and operate without hard ground being made available. -3- The hydraulic platform used in known equipment comprises three boorn sections operating with hydraulic cylinders. The booms are rotated on a rotating disk by 360° for reaching the monitor cage to the required height for rescue operation. For fighting fire, supply of extinguishing media can be used from a different / separate source. Thus the prior art hydraulic platform for rescue operation needs a very large area for its operation and as such it cannot enter or operate from a narrow lane. There was therefore, a need for an improved fire tender which can do high rise fire fighting and rescue work operating in narrow lanes. SUMMARY OF THE INVENTION The main object of the present invention therefore, is to provide a fire tender which can enter narrow roads and congested areas for both high rise fire fighting and rescue operation. -4- This and other objects of the present invention are achieved by providing a hydraulically operated retractable elevated platform which can rise vertically upto a height of about 27 - 30 feet shooting water / foam under pressure upto a height of three storeys, maintaining the center of gravity. The unique design of the elevating hydraulic platform mounted on a conventional fire tender operates without disturbing the center of gravity. It is provided with built in pump and storage tank for extinguishing media for fire fighting. The design allows the fire tender with retracted platform to move into lanes / road where standard elevated systems cannot enter or operate. This hydraulic platform will elevate to a height of approx 27 - 30 feet and shoot the water / foam into the fire even up to three storeys. The height of the elevated platform can further be extended by about 30 ft using an extension ladder. Pressure of water / foam will be of high standards, compared to the old practice of connecting of number of hoses to hydrant connections at the base level. This can also be utilized as a rescue platform. -5- Thus the present invention provides an improved fire-tender for high-rise fire fighting and rescue operation on narrow / congested roads comprising an elevating hydraulic platform mounted on a fire tender characterized in that said fire-tender is provided with a built-in pump and tanks for storing extinguishing media; and in that said elevating platform is capable of being raised vertically to the desired height for fire fighting and rescue operation. BREIF DESCRIPTION OF THE ACCOMPANYING DRAWINGS The invention can now be described in detail with the help of the figures of the accompanying drawings in which Figure 1 shows an existing 3-boom operated elevated hydraulic platform for rescue operation. Figure 2 shows the vertically elevating type hydraulic platform of the present invention mounted. -6- Figure 3 (a) shows location of CG for foam tank. Figure 3 (b) shows location of CG for water tank. Figure 3 (c) shows location of CG for hydraulic platform. Figure 3 (d) shows location of CG for chassis + cowl. Figure 3 (e) shows location of CG for the unit with platform raised to full height. Figure 3 (f) shows location of CG for the whole unit with platform in lowered condition. DESCRIPTION OF THE INVENTION A known arrangement of an elevating platform for rescue operation and fire fighting is shown in Figure 1. -7- Description of the elements against the references used in Figure 1 are: 1. MONITOR BRANCH for monitoring / supplying extinguishing media (water / foam) 2. FIRST BOOM 3. SECOND BOOM 4. THIRD BOOM 5. HYDRAULIC CYLINDER 6. CARRYING CAGE 7. ROTATING DISK 8. BOOM STAND for resting the booms when not in use 9. CREW CABIN 10. VEHICLE LADDER 11. LOCKERS 12. JACK / REST for stabilizing the vehicle 13. HYDRANT INLET for supplying water upto monitor 1. -8- In this arrangement fire fighting is done using supply of fire extinguishing media (water / foam) from a separate outside source. A monitoring branch 1 with a carrying cage 6 can be elevated to the desired location using three stages of booms 2, 3 and 4 operated by three hydraulic cylinders 5. The booms 2, 3, 4 can be rotated by 360° with the help of a rotating disk 7,. not shown in detail. A boom stand 8 is provided for resting the booms 2, 3, 4 when not in operation. A hydrant inlet 13 is provided for supplying the extinguishing media from a secondary source outside the arrangement, like water hydrants, pumps, etc. This existing arrangement of elevating platform needs a very large area for carrying out fire fighting and rescue operations. Figure 2 illustrates an elevated hydraulic platform of the present invention mounted on a conventional fire tender. The equipment is capable of carrying out both fire fighting and rescue operation using built-in arrangement for supply of extinguishing media under pressure. -9- HYDRAULIC PLATFORM TECHNICAL SPECIFICATIONS Capacity 500 Kg (Uniformly Distributed Load). Total weight of the Hydraulic Platform, including die load capacity is not more than 1.75 Ton. SizeofthePlatfonn 2400 mm X1200 mm Floor 5 mm Aluminum Checkered Plate Collapsed Height 1400 mm (Hand Railings and Monitor not Jnchxfrd) Extended Height 8000 mm (Hand Railings and Monitor not included) Mounting Heavy Duty Extra Rigid Base Structure connector frame mounted on the chassis secured with suitable cross members and U-Bohs. Connector frame shall secure the platform with the Chassis ofthe fire tender. Platform Structure Especially designed heavy-duty rectangular drawn box section with sufficient reinforcement shall be used for cross lifting arms. Top frame and bottom frame shall be made from heavy angles 75 x 75 X 6 mm3, 75 C-channels and 50 X 6 mm thick flats bars with sufficient stnTeners. AH center bushes of arms and free rollers having polished GUN METAL bush bearings with external gieasing facility. All junction pins, cylinder mounting pins and pivot pins shall be made from ground and T-condhion EN-8 material with external greasing facility. Hand Railing 1.5 meters height Collapsible on four sides Hydnmbc System Power Unit Consisting of Hydraulic Ofl Reservoir, Piston Pump coupled with a suitable diesel engine should produce sufficient power to operate the rally loaded hydraulic platform. Hydraulic components of reputed manufacturer such as REXROTH, MICO, POLYIYDRON, YUKEN etc shall be used. Diesel Engine Suitable reputed make-GREAVES, ELGIetc Hydraulic Cylinders Twin Jack type cylinders having ram 063 mm shall be used for lifting and lowering of top platform in honed tube of 90 mm hole. Piston rod shall be ground and hand chrome finished. Each cylinder has high-pressure chevron seal set, polymer fill Teflon guide strip, and gunmetal guide bosh and wiper seal Hydraulic Hose R2 heavy duty mark well make wire braided hoses with 3/8" BSP Connectors shall be used Safety Valves Non-Return valves and Pressure throttle valves shall be installed on the system. These valves shall ensure that the platform does not collapse even case of a hose failure Hydraulic Controls REXROTH make hand lever operated hydraulic valve system mounted inside the side lockers of the Fire Track. Fire Fighting System The platform shall be equipped with a manual monitor having a flow capacity of 2500 LPM. Three monitor shall be able to perform at its designed parameters when the platform is in fully extended position. Hard chrome, fine grounded telescopic water pipe of suitable size shall be provided along with platform. The specifications of the light alloy monitor are specified abo in the specification Telescope Access Ladder A telescopic extension ladder shall be provided along side the platform -10- Description of the elements against the references used in Figure 1 are: SL. NO. DESCRIPTION MATERIALS 101 BODY ALUMINIUM ALLOY 102 EXTENSION LADDER (10.5 METER) ALUMINIUM 103 ROILING SHUTTERS ALUMINIUM 104 TOWING HOOK M.S. 105 SIREN ALUMINIUM 106 P.A. SYSTEM STD 107 CABEL REEL STD 108 RAILING M.S. 109 LOCKERS ALUMINIUM 110 WATER FOAM MONITORS (2500 LPM) STD 111 FOG LAMP STD 112 LIGHT BAR STD 113 MUDGUARD ALUMINIUM 114 STEP ALUMINIUM 115 SEARCH LIGHT STD 116 LOCKERS FOR D.C.P. ALUMINIUM 117 PUMP 3000 LPM @ 7 KG / CM2 GUN METAL 118 HOSE REEL HOSE / LOW PRESSURE STD 119 WATER TANK 4000 LITER M.S. 120 FOAM TANK 1000 LITER S.S. 121 ACCESSORIES LOCKER ALUMINIUM 122 HYDRAULIC PLATFORM WITH POWER PACK (10.5 METER HEIGHT) 123 HYDRAULIC CYLINDERS 124 CARRYING CAGE -11- The arrangement comprises lockers for 116, a pump 117 for supplying extinguishing media from water tank 119 and foam tank 120. The pump 117 is of 3000 LPM capacity at a normal pressure of 7 kg / cm2 and 250 / 300 LPM / capacity at 40 / 35 kg / cm2 pressure. Capacity of the water tank 119 and foam tank 120 can be of 4000 and 1000 liters respectively. A hose reel 118 is provided for storing hoses and accessories like extinguishers, other hoses and accessories, etc. can be stored in lockers 121. A water / foam monitor 110 is provided above a carrying cage 124 mounted on top of an elevating platform 122 operated by hydraulic cylinders 123. Other required accessories are also provided like siren 105, PA system 106, cable reel 107, fog lamp 111, etc. -12- As shown in Figure 2, the elevating hydraulic platform 122 of the present invention can be raised vertically using the hydraulic power pack for both fire fighting and rescue operation upto a height of 27-30 ft and needs very little area for the two operations. An extension ladder 102 is provided for extending the elevated height of platform 123 by about 30 ft for rescue operation. The following table shows the comparison between the known system and the system of the present invention: EXISTING SYSTEM SYSTEM OF PRESENT INVENTION Only rescue can be done, fire fighting can be done with the help of other source. Rescue and fire fighting can be done No built-in pump / No extinguishing media Built-in pump and extinguishing media incorporated Minutes 20-30 required for operation Can be operated within 3-5 minutes Maintenance cost high Low on maintenance cost High road clearance required for operation. Only low road clearance required. -13- A comparison chart of area required for keeping the equipment of the present invention in operation is shown below: Existing System System of Present Invention Body Length 52 ft Bocly Width 14.10 ft Body Height 12.8 ft 26 ft 8.3 ft 9.8 ft Area required for operation 65 ft 26 ft hydraulic platform rises vertically needing very little area for operation for rescue and fire fighting (both systems in-built). Pump:- The pump shall be of reputed make conforming to the following specification: -14- Pump of normal and high pressure centrifugal type capable of delivering minimum 1800-2350 LPM or preferably, 3000 LPM @ 7 Kgs / Cm2 and 300/250 LPM @ 35 / 40 Kgs / Cm2. The complete pump assembly i.e. pump housing, diffusers, impeller shall be made of gun metal conforming to 318 LTP 2 with S.S. pump shaft and shall be carried in antifriction bearings. The normal pressure and high pressure impeller shall be mounted as same shaft. The pump gland shall be self-adjusting "Radial Mechanical Seal" type and shall be easily replaceable. The design of the pump shall be such that the normal and higher pressure stages can be operated simultaneously. The pump housing shall have provision to connect normal pressure hose reel and cooling water line. Simple mechanism shall be provided to change-over from normal pressure to high pressure preferably a single lever operation. -15- The pump shall be provided with suction inlet of minimum 125 mm dia conforming to IS Standard for connecting standard suction hoses (Provide 100 mm adapter inlet) with internal removal strainer and btenk cap. The pump shall be provided two deliveries outlet of 63 mm quick release coupling conforming to IS standards with blank cap. The pump shall be mounted at the rear of the vehicle connected to power take-off (PTO) by propeller shaft with sufficient number of bearing support. Primer:- The pump shall be fitted with exhaust ejector type primer. The primer shall be capable of lifting water from 7 meters @ not less than 30 cm / second. Power Take-off:- The PTO shall be heavy duty indigenous PTO of suitable ratio and the lever for engaging the PTO shall be provided in driver's cabin. -16- Water Tank :- Water tank shall be of 4000 liters capacity suitably mounted on the chassis. The complete tank shall be fabricated out of M.S. plates of minimum 5 mm thick. The tank shall be of welded construction and shall be suitably treated for only corrosion after completely sand blasting the internal surface and shall be EPOXY painted. An inspection hole of not less than 450 mm size shall be provided on the top and shall be marked WATER. Suitable eyes shall be provided on the shell of the tank to enable it to be lifted off the vehicle for repairs / replacement as necessary. A cleaning hole of 250 mm shall be provided at the bottom of the tank with a 50 mm dia drain pipe with a valve and plug connection and shall be taken down to a point well below the chassis without reducing the effective clearance. -17- Tank shall have following connections to facilitate the operation: Hydrant - Tank Tank - Pump - Hose Reel Tank - Pump - Monitor (Foam / water) Hydrant Pump - Hose Reel Tank - Pump - 2 Nos. Deliveries. Pump to Cooling Tank The filing connections in the tank shall be of suitable diameter and shall be fitted with two 63 mm inst. male connections of GM with removable strainer and blank cap and NRVs. A water level indicator shall be provided close to the control panel. The tank shall be connected to the pump with a butterfly valve which shall be pneumatically operated with manual override facility of ease of operation. -18- Foam Tank :- The Foam Tank of 1000 liters capacity shall be fabricated out of minimum 4 mm thick SS 304 plates and 3 mm plates for the barffes. The tank shall be suitably baffled. In addition a 2 % of expansion space shall be made in the tank, over and above foam compound capacity. The cleaning hole of 250 mm and drain pipe with a ball valve and plug incorporated in it shall be provided. The filler orifice of 150 mm dia with a removable strainer (material-resistant to the attack of foam compound) shall be provided. The filler cap shall be clearly marked "FOAM". Inspection hole of 450 mm with cover shall be provided. Means shall be provided for automatic venting of the foam compound tank when the foam compound is drawn from it or when the tank is being filled. -19- A foam solution transfer pump Rotary type with necessary piping shall be provided. A provision shall be made for drawing foam compound direct from an external source through a pick-up tube while producing foam. The dra^vy "off tube shall be connected to the foam proportioned with NRV in addition to the main control valve. The draw off pipe shall be fitted with removable strainer of suitable material. Foam ProPOrtioner:- Around the pump proportioned with variable setting selector valve to induce foam compound shall be provided between the foam compound tank and the pump and auxiliary foam pick up tube shall be provided. Delivery Outlets :- There shall be minimum 2 numbers delivery outlets having standard GM inst. Female coupling with screw down type delivery valves with blank caps. It shall have twist type lugs made of GM. -20- Normal Pressure Hose Reel:- One first aid hose reel shall be provided on the appliance with 60 meter length of 20 mm dia with suitable cofan^ction to couple one end to hose reel and the other end to shut-off nozzle. The hose reel shall be fitted in an accessible position and shall be worked through the fire pump at the rear. High Pressure Hose Reel:- One high pressure hose reel to facilitate operation of the high pressure section of the fire pump shall be provided and mounted so as to be accessible for use from either side of the appliance. The hose shall be prevented from kinking. Working pressure of hose shall not be less than 40 Kg / Cm2 The high pressure hose reel shall hold not less than 60 M of hose in one length, terminating in a high pressure fog gun. Plumbing between the pump and hose reel shall have clean and unobstructed water way of not less than 25 mm throughout with any restriction. -21- Water / Foam Monitor :- One water cum foam monitor will be provided on the top of suitable location. The monitor should be capable of traversing through 360 degree in horizontal plane and 90 degree up and 15 degree down in vertical plane with discharge range of 45 M. Piping and Valves :- All piping and fitting shall be SS - 304. All valves up to 3" size shall be of lever operated ball valve and all valves above 3" size shall be normal butterfly valves. Controi Panel:- Shall be as per IS. The panel for water / foam system adequately illuminated shaH be provided at rear side of appliance. All controls of the system shall be spaced properly and marked for easy operation. All other control like electrical siren etc. shall be provided at driver's cabin with identification plate. -22- Body Work of Tender :- Enclosed accommodation shall be provided for driver and one officer in the front of seating arrangement for a crew of 5 person shall be made at the rear of the drivers cabin. The driver seat shall be adjustable. All the doors shall be fitted with safety glasses, wire-mesh and winding type regulators. The wire mesh shall be provided on front glass of driver cabin. Lockers provided for staring various equipments shall be covered with aluminum roller shutters including pump side. Locker internal base plate shall be of chequered plate type and shall have rack / to store required accessories. Dimensions of which shall be furnished during the fabrication. Special Provision for Storage of Equipment:- For all water fittings like branch pipes etc. Quick release types couplings are provided which enables the operator to locate the desired equipment instantly and thereby save valuable time at the time of fire. These couplings also ensure that none of the items damage the internal paneling and thereby increase the life of the vehicle. Suitable clamps, brackets, holders etc. are provided for all other items. -23- 1. CO2 extinguishing system 4 numbers CO2 fire extinguishers (two on each side of the vehicle) capacity of 22.5 Kg with batteries along with 30 meters long high pressure hose connected with discharge horn and insulated handle shall be supplied with the Tender. 2. DCP extinguishing system 2 numbers DCP extinguishing system (one on each side of the vehicle in the same lockers of CO2 capacity 75 Kg conforming IS 4308 - 1982 with 25 mm dia and 30 meters long high pressure hose and trigger control shut of nozzle shall be provided. The range of jet shall be 12 meter. The hose and nozzle shall be stowed suitably in locker in either side of the tender to facilitate speedy operation incase of any emergency. Electrical System:- All the wiring shall be of dipole and properly fixed in position and shall be protected against heat, oil and physical injury. Wherever, necessary wiring shall pass through conduits. -24- All electrical circuits shall have separate fuses suitably marked and grouped in a common fuse located in an easily accessible position. Provision shall be made for minimum 4 spares fuses in the box provided in driver cabin. EXIDE make battery, and battery operated two tone hooters / mike system with amplifiers and micro-phone shall be provided in front of Officer Seat in driver's cabin in a box. All controls for electrical system shall be provided in front of driver's seat. Battery shall be placed in totally enclosed box. Other Constructional Details:- Grab-rails and non slips steps of heavy chequered plate shall be provided wherever necessary. The entire structure of appliance including that of driver's cabin shall be welded structure made of 14 SWG MS pressed section, square tubes, angles and channels with aluminum paneling. The paneling shall be done from 16 SWG aluminum sheet. Complete flooring shall be 16 SWG aluminum chequered plate. The vehicle shall be covered from top with 16 SWG chequered plate having rain water channel at both side. The openings for equipments shall be sealed properly to ensure no water goes inside. -25- Ladder gallows of roller type shall be provided on the roof of vehicle for placihg 10.5 mm aluminum extension ladder. Fittings and Accessories:- Following electrical fitting shall be provided on the appliance at suitable location: GRAND make light baris to provided 1 Sets Battery operated Siren 1 Km range and P.A. each 1 No System of 1 Km Range (Line Diag) Spot lights one in front and other in rear adjustable type 2 Nos. Fog Lamps 2 Nos. Blinkers type traffic indicators 1 Nos. Removable type search light with 60 meters. Cable and tripod stand 2 Nos. -26- CALCULATIONS FOR THE CENTRE OF GRAVITY To find out the CG of the fire truck as per the specifications, the truck can be divided into individual masses. We shall find out the individual CG for individual masses. For all the bodies in consideration, length would be the dimension measured along the wheelbase of the chassis while the width would be the dimension measured along the track of the truck. Weight would be measured in kilograms and distance would be measured in miHimeters. Since all the individual masses in consideration are located centrally width wise, one of the widthwise coordinate of the CG would lie at the center of the track width. The track width for TATA 2518 IS 2260 MM. Hence the width of the masses need not be considered in the calculation of CG. -27- 1. Foam Tank (1000 Liters Capacity) weight of foam + weight of empty tank = 1500 kgs size of the tank (L X H X W) = 800 X 1000 X 1400 mm The position of CG would be = {1/2 (L), 1/z (H)} = (400,500). The location is shown in the picture Figure 3(a). 2. Water Tank (4000 Liters Capacity) weight of water + weight of empty tank = 5000 kgs size of the tank (LXHxw) = 3000 x 1000 x 1400 mm The position of CG would be = {Va (L), Vi (H)} - (1500,500). The location is shown in the picture Figure 3(b) -28- 3. Hydraulic Platform (500 kgs UDL (Un Divided Load) Capacity) weight of platform + load = 2500 kgs size of the extended platform (L X H X W) = 1500 X 8000 X 2400 mm size of the collapsed platform (LXHXW) = 1500 X 1300 X 2400 mm Since the platform is a rectangular structure in extended and collapsed condition, the position of CG in would be: {V2 (L), Yi (H)} = (750 X 4000) in extended condition {y2 (L), y2 (H)} = (750 X 650) in collapsed condition The location is shown in the picture Figure 3 (c) -29- 4. Chassis + Cowl (TATA 2518) wheelbase (distance) = 4880 mm bare kerb weight of the chassis = 6500 kg front axle weight = 1650 kg rear axle weight = 3850 kg ratio of weight division (FA: RA) = 3:7 The weight on truck's front and rear axles is directly proportional to the location of the center of gravity along the truck's wheelbase. It is a direct inverse ratio. Hence the CG of chassis is located at 70/100 * WB = 70/100 * 4880= 3420 mm from the center of front axle along the wheelbase. The position is shown in the picture Figure 3(d). -30- 5. Center of Gravity - Platform Raised to Full Height To calculate the CG of the whole unit, we shall project the above individual masses on same plate as shown Figure 3(d). From the above Figure: mO = 6500 kg x 0 = 4135 mm ml = 1500 kg x 1 = 1500 mm m2 = 5000 kg x 2 = 3500 mm m3 = 2500 kg x 3 = 5841 mm Substituting the values in the above equation, we obtain the position of CG on X-Axis = 3950 mm mO = 6500 kg mi = 1500 kg m2 = 5000 kg m3 = 2500 kg yO = 0550 mm yl = 1700 mm y2 = 1700 mm y3 = 5206 mm -31- Substituting the values in the above equation, we obtain the position of CG on Y- Axis = 1720 mm. The position of CG (3950,1720) is shown in Figure 3(e). 6. Center of Gravity - Platform in Lowered Condition To calculate the CG of the whole unit, we shall project the above individual masses on same plane as shown in Figure 8. Xcm - S mix, mjXi + m2x2 + m^ rri\| rrii + tri2 + 1TI3 From the figure 7: mO = 6500 kg ml = 1500 kg m2 = 5000 kg m3 == 2500 kg x 0 = 4135 mm x 1 = 1500 mm x 2 = 3500 mm x 3 = 5841 mm -32- Substituting the values in the above equation, we obtain the position of CG on X-Axis = 3950 mm mO = 6500 kg ml = 1500 kg m2 = 5000 kg m3 = 2500 kg x 3 yO = 0550 mm yl = 1700 mm y2 = 1700 mm y3 = 1891 mm Substituting the values in the above equation, we obtain the position of CG on Y-Axis = 1185 mm The position of CG (3950,1185) is shown in the Figure 3(f)- -33- WE CLAIM 1. An improved fire-tender for high-rise fire fighting and rescue operation on narrow / congested roads comprising an elevating hydraulic platform mounted on a fire tender characterized in that said fire-tender is provided with a builWn pump and tanks for storing extinguishing media; and in that said elevating platform is capable of being raised vertically to the desired height for fire fighting and rescue operation. 2. The fire-tender as claimed in claim 1, wherein said elevating hydraulic platform can be raised for rescue operation and fire fighting upto a height of approximately 27 to 30 ft. 3. The fire-tender as claimed in claim 2, wherein an extension ladder is provided for extending the elevated height of the platform by about 30 ft for rescue operation. -34- 4. The fire-tender as claimed in claim 1, wherein the capacity of the pump for supplying extinguishing media is 3000 LPM at a normal pressure of 7 kg per cm2 and 250 / 300 LPM at a high pressure of 40 / 35 kg / cm2. 'V" 5. The fire-tender as claimed in claim \t wherein said tanks for extinguishing media comprise a water tank of 4000 liter capacity and a foam tank of 1000 liter capacity. 6. The fire-tender as claimed in claim 1, wherein a carrying cage and a water / foam monitor are provided mounted on said elevating hydraulic platform. 7. The fire-tender as claimed in claim 6, wherein the capacity of said water foam monitor is 2500 LPM. 8. The fire-tender as claimed in claim 1, wherein said fire-tender is provided with arrangements for storing all required equipment like fire extinguishing, hoses, and other access. -35- 9. The fire-tender as claimed in claim 1, wherein said fire tender is provided with required accessories like a towing hook, siren and PA system, and fog lamp. 10. An improved fire-tender for high-rise fire fighting and rescue operation on narrow / congested roads, substantially as herein described and illustrated in the accompanying drawings. This and other objects of the present invention are achieved by providing a hydraulically operated retractable elevated platform which can rise vertically upto a height of about 27 - 30 feet shooting water / foam under pressure upto a height of three storeys, maintaining the center of gravity. The unique design of the elevating hydraulic platform mounted on a conventional fire tender operates without disturbing the center of gravity. It is provided with built in pump and storage tank for extinguishing media for fire fighting. The design allows the fire tender with retracted platform to move into lanes / road where standard elevated systems cannot enter or operate. This hydraulic platform will elevate to a height of approx 27 - 30 feet and shoot the water / foam into the fire even up to three storeys. The height of the elevated platform can further be extended by about 30 ft using an extension ladder. Pressure of water / foam will be of high standards, compared to the old practice of connecting of number of hoses to hydrant connections at the base level. This can also be utilized as a rescue platform. Thus the present invention provides an improved fire-tender for high-rise fire fighting and rescue operation on narrow / congested roads comprising an elevating hydraulic platform mounted on a fire tender characterized in that said fire-tender is provided with a built-in pump and tanks for storing extinguishing media; and in that said elevating platform is capable of being raised vertically to the desired height for fire fighting and rescue operatio The main object of the present invention therefore, is to provide a fire tender which can enter narrow roads and congested areas for both high rise fire fighting and rescue operation.

Full Text

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FIELD OF APPLICATION
The present invention relates to an improved fire tender for high rise fire fighting and rescue operation.
In particular, it relates to a hydraulic platform mounted fire tender for multistorey fire fighting and rescue operation in multistoried buildings located on narrow roads and congested areas.
BACKGROUND OF THE INVENTION
Fire tenders are available to fight fire with various extinguishing media. Some of these fire tenders are also provided with separate high-rise platforms used for rescue operations along with separate supply of extinguishing media for fire fighting. Such equipment however, cannot enter narrow lanes and operate without hard ground being made available.
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The hydraulic platform used in known equipment comprises three boorn sections operating with hydraulic cylinders. The booms are rotated on a rotating disk by 360° for reaching the monitor cage to the required height for rescue operation. For fighting fire, supply of extinguishing media can be used from a different / separate source. Thus the prior art hydraulic platform for rescue operation needs a very large area for its operation and as such it cannot enter or operate from a narrow lane.
There was therefore, a need for an improved fire tender which can do high rise fire fighting and rescue work operating in narrow lanes.
SUMMARY OF THE INVENTION
The main object of the present invention therefore, is to provide a fire tender which can enter narrow roads and congested areas for both high rise fire fighting and rescue operation.

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This and other objects of the present invention are achieved by providing a hydraulically operated retractable elevated platform which can rise vertically upto a height of about 27 - 30 feet shooting water / foam under pressure upto a height of three storeys, maintaining the center of gravity.
The unique design of the elevating hydraulic platform mounted on a conventional fire tender operates without disturbing the center of gravity. It is provided with built in pump and storage tank for extinguishing media for fire fighting.
The design allows the fire tender with retracted platform to move into lanes / road where standard elevated systems cannot enter or operate. This hydraulic platform will elevate to a height of approx 27 - 30 feet and shoot the water / foam into the fire even up to three storeys. The height of the elevated platform can further be extended by about 30 ft using an extension ladder. Pressure of water / foam will be of high standards, compared to the old practice of connecting of number of hoses to hydrant connections at the base level. This can also be utilized as a rescue platform.
-5-
Thus the present invention provides an improved fire-tender for high-rise fire fighting and rescue operation on narrow / congested roads comprising an elevating hydraulic platform mounted on a fire tender characterized in that said fire-tender is provided with a built-in pump and tanks for storing extinguishing media; and in that said elevating platform is capable of being raised vertically to the desired height for fire fighting and rescue operation.
BREIF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The invention can now be described in detail with the help of the figures of the accompanying drawings in which
Figure 1 shows an existing 3-boom operated elevated hydraulic platform for rescue operation.
Figure 2 shows the vertically elevating type hydraulic platform of the present invention mounted.
-6-
Figure 3 (a) shows location of CG for foam tank.
Figure 3 (b) shows location of CG for water tank.
Figure 3 (c) shows location of CG for hydraulic platform.
Figure 3 (d) shows location of CG for chassis + cowl.
Figure 3 (e) shows location of CG for the unit with platform raised to full height.
Figure 3 (f) shows location of CG for the whole unit with platform in lowered condition.
DESCRIPTION OF THE INVENTION
A known arrangement of an elevating platform for rescue operation and fire fighting is shown in Figure 1.
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Description of the elements against the references used in Figure 1 are:
1. MONITOR BRANCH for monitoring / supplying extinguishing media (water
/ foam)
2. FIRST BOOM
3. SECOND BOOM
4. THIRD BOOM
5. HYDRAULIC CYLINDER
6. CARRYING CAGE
7. ROTATING DISK
8. BOOM STAND for resting the booms when not in use
9. CREW CABIN
10. VEHICLE LADDER
11. LOCKERS
12. JACK / REST for stabilizing the vehicle
13. HYDRANT INLET for supplying water upto monitor 1.
-8-
In this arrangement fire fighting is done using supply of fire extinguishing media (water / foam) from a separate outside source. A monitoring branch 1 with a carrying cage 6 can be elevated to the desired location using three stages of booms 2, 3 and 4 operated by three hydraulic cylinders 5.
The booms 2, 3, 4 can be rotated by 360° with the help of a rotating disk 7,. not shown in detail. A boom stand 8 is provided for resting the booms 2, 3, 4 when not in operation.
A hydrant inlet 13 is provided for supplying the extinguishing media from a secondary source outside the arrangement, like water hydrants, pumps, etc.
This existing arrangement of elevating platform needs a very large area for carrying out fire fighting and rescue operations.
Figure 2 illustrates an elevated hydraulic platform of the present invention mounted on a conventional fire tender. The equipment is capable of carrying out both fire fighting and rescue operation using built-in arrangement for supply of extinguishing media under pressure.
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HYDRAULIC PLATFORM TECHNICAL SPECIFICATIONS
Capacity 500 Kg (Uniformly Distributed Load). Total weight of the Hydraulic Platform, including die load capacity is not more than 1.75 Ton.
SizeofthePlatfonn 2400 mm X1200 mm
Floor 5 mm Aluminum Checkered Plate
Collapsed Height 1400 mm (Hand Railings and Monitor not Jnchxfrd)
Extended Height 8000 mm (Hand Railings and Monitor not included)
Mounting Heavy Duty Extra Rigid Base Structure connector frame mounted on the chassis secured with suitable cross members and U-Bohs. Connector frame shall secure the platform with the Chassis ofthe fire tender.
Platform Structure Especially designed heavy-duty rectangular drawn box section with sufficient reinforcement shall be used for cross lifting arms. Top frame and bottom frame shall be made from heavy angles 75 x 75 X 6 mm3, 75 C-channels and 50 X 6 mm thick flats bars with sufficient stnTeners. AH center bushes of arms and free rollers having polished GUN METAL bush bearings with external gieasing facility. All junction pins, cylinder mounting pins and pivot pins shall be made from ground and T-condhion EN-8 material with external greasing facility.
Hand Railing 1.5 meters height Collapsible on four sides
Hydnmbc System
Power Unit Consisting of Hydraulic Ofl Reservoir, Piston Pump coupled with a suitable diesel engine should produce sufficient power to operate the rally loaded hydraulic platform. Hydraulic components of reputed manufacturer such as REXROTH, MICO, POLYIYDRON, YUKEN etc shall be used.
Diesel Engine Suitable reputed make-GREAVES, ELGIetc
Hydraulic Cylinders Twin Jack type cylinders having ram 063 mm shall be used for lifting and lowering of top platform in honed tube of 90 mm hole. Piston rod shall be ground and hand chrome finished. Each cylinder has high-pressure chevron seal set, polymer fill Teflon guide strip, and gunmetal guide bosh and wiper seal
Hydraulic Hose R2 heavy duty mark well make wire braided hoses with 3/8" BSP Connectors shall be used
Safety Valves Non-Return valves and Pressure throttle valves shall be installed on the system. These valves shall ensure that the platform does not collapse even case of a hose failure
Hydraulic Controls REXROTH make hand lever operated hydraulic valve system mounted inside the side lockers of the Fire Track.
Fire Fighting System The platform shall be equipped with a manual monitor having a flow capacity of 2500 LPM. Three monitor shall be able to perform at its designed parameters when the platform is in fully extended position. Hard chrome, fine grounded telescopic water pipe of suitable size shall be provided along with platform. The specifications of the light alloy monitor are specified abo in the specification
Telescope Access Ladder A telescopic extension ladder shall be provided along side the platform
-10-
Description of the elements against the references used in Figure 1 are:

SL. NO. DESCRIPTION MATERIALS
101 BODY ALUMINIUM ALLOY
102 EXTENSION LADDER (10.5 METER) ALUMINIUM
103 ROILING SHUTTERS ALUMINIUM
104 TOWING HOOK M.S.
105 SIREN ALUMINIUM
106 P.A. SYSTEM STD
107 CABEL REEL STD
108 RAILING M.S.
109 LOCKERS ALUMINIUM
110 WATER FOAM MONITORS (2500 LPM) STD
111 FOG LAMP STD
112 LIGHT BAR STD
113 MUDGUARD ALUMINIUM
114 STEP ALUMINIUM
115 SEARCH LIGHT STD
116 LOCKERS FOR D.C.P. ALUMINIUM
117 PUMP 3000 LPM @ 7 KG / CM2 GUN METAL
118 HOSE REEL HOSE / LOW PRESSURE STD
119 WATER TANK 4000 LITER M.S.
120 FOAM TANK 1000 LITER S.S.
121 ACCESSORIES LOCKER ALUMINIUM
122 HYDRAULIC PLATFORM WITH POWER PACK (10.5 METER HEIGHT)
123 HYDRAULIC CYLINDERS
124 CARRYING CAGE
-11-
The arrangement comprises lockers for
116, a pump 117 for supplying extinguishing media from water tank 119 and foam tank 120.
The pump 117 is of 3000 LPM capacity at a normal pressure of 7 kg / cm2 and 250 / 300 LPM / capacity at 40 / 35 kg / cm2 pressure. Capacity of the water tank 119 and foam tank 120 can be of 4000 and 1000 liters respectively. A hose reel 118 is provided for storing hoses and accessories like extinguishers, other hoses and accessories, etc. can be stored in lockers 121.
A water / foam monitor 110 is provided above a carrying cage 124 mounted on top of an elevating platform 122 operated by hydraulic cylinders 123.
Other required accessories are also provided like siren 105, PA system 106, cable reel 107, fog lamp 111, etc.
-12-
As shown in Figure 2, the elevating hydraulic platform 122 of the present invention can be raised vertically using the hydraulic power pack for both fire fighting and rescue operation upto a height of 27-30 ft and needs very little area for the two operations.
An extension ladder 102 is provided for extending the elevated height of platform 123 by about 30 ft for rescue operation.
The following table shows the comparison between the known system and the system of the present invention:

EXISTING SYSTEM SYSTEM OF PRESENT INVENTION
Only rescue can be done, fire fighting can be done with the help of other source. Rescue and fire fighting can be done
No built-in pump / No extinguishing media Built-in pump and extinguishing media incorporated
Minutes 20-30 required for operation Can be operated within 3-5 minutes
Maintenance cost high Low on maintenance cost
High road clearance required for operation. Only low road clearance required.
-13-
A comparison chart of area required for keeping the equipment of the present invention in operation is shown below:
Existing System System of Present Invention
Body Length 52 ft
Bocly Width 14.10 ft
Body Height 12.8 ft
26 ft
8.3 ft
9.8 ft
Area required for operation 65 ft 26 ft
hydraulic platform rises vertically needing very little area for operation for rescue and fire fighting (both systems in-built).
Pump:- The pump shall be of reputed make conforming to the following specification:
-14-
Pump of normal and high pressure centrifugal type capable of delivering minimum 1800-2350 LPM or preferably, 3000 LPM @ 7 Kgs / Cm2 and 300/250 LPM @ 35 / 40 Kgs / Cm2. The complete pump assembly i.e. pump housing, diffusers, impeller shall be made of gun metal conforming to 318 LTP 2 with S.S. pump shaft and shall be carried in antifriction bearings.
The normal pressure and high pressure impeller shall be mounted as same shaft. The pump gland shall be self-adjusting "Radial Mechanical Seal" type and shall be easily replaceable.
The design of the pump shall be such that the normal and higher pressure stages can be operated simultaneously.
The pump housing shall have provision to connect normal pressure hose reel and cooling water line. Simple mechanism shall be provided to change-over from normal pressure to high pressure preferably a single lever operation.
-15-
The pump shall be provided with suction inlet of minimum 125 mm dia conforming to IS Standard for connecting standard suction hoses (Provide 100 mm adapter inlet) with internal removal strainer and btenk cap. The pump shall be provided two deliveries outlet of 63 mm quick release coupling conforming to IS standards with blank cap. The pump shall be mounted at the rear of the vehicle connected to power take-off (PTO) by propeller shaft with sufficient number of bearing support.
Primer:- The pump shall be fitted with exhaust ejector type primer. The
primer shall be capable of lifting water from 7 meters @ not less than 30 cm / second.
Power Take-off:- The PTO shall be heavy duty indigenous PTO of
suitable ratio and the lever for engaging the PTO shall be provided in driver's cabin.
-16-
Water Tank :- Water tank shall be of 4000 liters capacity suitably mounted on the chassis.
The complete tank shall be fabricated out of M.S. plates of minimum 5 mm thick. The tank shall be of welded construction and shall be suitably treated for only corrosion after completely sand blasting the internal surface and shall be EPOXY painted.
An inspection hole of not less than 450 mm size shall be provided on the top and shall be marked WATER. Suitable eyes shall be provided on the shell of the tank to enable it to be lifted off the vehicle for repairs / replacement as necessary.
A cleaning hole of 250 mm shall be provided at the bottom of the tank with a 50 mm dia drain pipe with a valve and plug connection and shall be taken down to a point well below the chassis without reducing the effective clearance.
-17-
Tank shall have following connections to facilitate the operation:
Hydrant - Tank
Tank - Pump - Hose Reel
Tank - Pump - Monitor (Foam / water)
Hydrant Pump - Hose Reel
Tank - Pump - 2 Nos. Deliveries.
Pump to Cooling Tank
The filing connections in the tank shall be of suitable diameter and shall be fitted with two 63 mm inst. male connections of GM with removable strainer and blank cap and NRVs. A water level indicator shall be provided close to the control panel. The tank shall be connected to the pump with a butterfly valve which shall be pneumatically operated with manual override facility of ease of operation.
-18-
Foam Tank :- The Foam Tank of 1000 liters capacity shall be fabricated
out of minimum 4 mm thick SS 304 plates and 3 mm plates for the barffes. The tank shall be suitably baffled. In addition a 2 % of expansion space shall be made in the tank, over and above foam compound capacity.
The cleaning hole of 250 mm and drain pipe with a ball valve and plug incorporated in it shall be provided. The filler orifice of 150 mm dia with a removable strainer (material-resistant to the attack of foam compound) shall be provided. The filler cap shall be clearly marked "FOAM".
Inspection hole of 450 mm with cover shall be provided. Means shall be provided for automatic venting of the foam compound tank when the foam compound is drawn from it or when the tank is being filled.
-19-
A foam solution transfer pump Rotary type with necessary piping shall be provided. A provision shall be made for drawing foam compound direct from an external source through a pick-up tube while producing foam. The dra^vy "off tube shall be connected to the foam proportioned with NRV in addition to the main control valve. The draw off pipe shall be fitted with removable strainer of suitable material.
Foam ProPOrtioner:- Around the pump proportioned with variable
setting selector valve to induce foam compound shall be provided between the foam compound tank and the pump and auxiliary foam pick up tube shall be provided.
Delivery Outlets :- There shall be minimum 2 numbers delivery outlets having standard GM inst. Female coupling with screw down type delivery valves with blank caps. It shall have twist type lugs made of GM.
-20-
Normal Pressure Hose Reel:- One first aid hose reel shall be provided
on the appliance with 60 meter length of 20 mm dia with suitable cofan^ction to couple one end to hose reel and the other end to shut-off nozzle. The hose reel shall be fitted in an accessible position and shall be worked through the fire pump at the rear.
High Pressure Hose Reel:- One high pressure hose reel to facilitate operation of the high pressure section of the fire pump shall be provided and mounted so as to be accessible for use from either side of the appliance. The hose shall be prevented from kinking. Working pressure of hose shall not be less than 40 Kg / Cm2
The high pressure hose reel shall hold not less than 60 M of hose in one length, terminating in a high pressure fog gun. Plumbing between the pump and hose reel shall have clean and unobstructed water way of not less than 25 mm throughout with any restriction.
-21-
Water / Foam Monitor :- One water cum foam monitor will be provided on the top of suitable location. The monitor should be capable of traversing through 360 degree in horizontal plane and 90 degree up and 15 degree down in vertical plane with discharge range of 45 M.
Piping and Valves :- All piping and fitting shall be SS - 304. All valves up
to 3" size shall be of lever operated ball valve and all valves above 3" size shall be normal butterfly valves.
Controi Panel:- Shall be as per IS. The panel for water / foam system
adequately illuminated shaH be provided at rear side of appliance. All controls of the system shall be spaced properly and marked for easy operation.
All other control like electrical siren etc. shall be provided at driver's cabin with identification plate.
-22-
Body Work of Tender :- Enclosed accommodation shall be provided for
driver and one officer in the front of seating arrangement for a crew of 5 person shall be made at the rear of the drivers cabin. The driver seat shall be adjustable.
All the doors shall be fitted with safety glasses, wire-mesh and winding type regulators. The wire mesh shall be provided on front glass of driver cabin. Lockers provided for staring various equipments shall be covered with aluminum roller shutters including pump side. Locker internal base plate shall be of chequered plate type and shall have rack / to store required accessories. Dimensions of which shall be furnished during the fabrication.
Special Provision for Storage of Equipment:- For all water fittings like branch pipes etc. Quick release types couplings are provided which enables the operator to locate the desired equipment instantly and thereby save valuable time at the time of fire. These couplings also ensure that none of the items damage the internal paneling and thereby increase the life of the vehicle. Suitable clamps, brackets, holders etc. are provided for all other items.
-23-
1. CO2 extinguishing system
4 numbers CO2 fire extinguishers (two on each side of the vehicle) capacity of 22.5 Kg with batteries along with 30 meters long high pressure hose connected with discharge horn and insulated handle shall be supplied with the Tender.
2. DCP extinguishing system
2 numbers DCP extinguishing system (one on each side of the vehicle in the same lockers of CO2 capacity 75 Kg conforming IS 4308 - 1982 with 25 mm dia and 30 meters long high pressure hose and trigger control shut of nozzle shall be provided. The range of jet shall be 12 meter. The hose and nozzle shall be stowed suitably in locker in either side of the tender to facilitate speedy operation incase of any emergency.
Electrical System:- All the wiring shall be of dipole and properly fixed in position and shall be protected against heat, oil and physical injury. Wherever, necessary wiring shall pass through conduits.
-24-
All electrical circuits shall have separate fuses suitably marked and grouped in a common fuse located in an easily accessible position. Provision shall be made for minimum 4 spares fuses in the box provided in driver cabin.
EXIDE make battery, and battery operated two tone hooters / mike system with amplifiers and micro-phone shall be provided in front of Officer Seat in driver's cabin in a box. All controls for electrical system shall be provided in front of driver's seat. Battery shall be placed in totally enclosed box.
Other Constructional Details:- Grab-rails and non slips steps of heavy
chequered plate shall be provided wherever necessary. The entire structure of appliance including that of driver's cabin shall be welded structure made of 14 SWG MS pressed section, square tubes, angles and channels with aluminum paneling. The paneling shall be done from 16 SWG aluminum sheet. Complete flooring shall be 16 SWG aluminum chequered plate. The vehicle shall be covered from top with 16 SWG chequered plate having rain water channel at both side. The openings for equipments shall be sealed properly to ensure no water goes inside.
-25-
Ladder gallows of roller type shall be provided on the roof of vehicle for placihg 10.5 mm aluminum extension ladder.
Fittings and Accessories:- Following electrical fitting shall be provided on the appliance at suitable location:
GRAND make light baris to provided 1 Sets
Battery operated Siren 1 Km range and P.A. each 1 No
System of 1 Km Range (Line Diag)
Spot lights one in front and other in rear adjustable type 2 Nos.
Fog Lamps 2 Nos.
Blinkers type traffic indicators 1 Nos.
Removable type search light with 60 meters. Cable and tripod stand 2 Nos.
-26-
CALCULATIONS FOR THE CENTRE OF GRAVITY
To find out the CG of the fire truck as per the specifications, the truck can be divided into individual masses. We shall find out the individual CG for individual masses.
For all the bodies in consideration, length would be the dimension measured along the wheelbase of the chassis while the width would be the dimension measured along the track of the truck. Weight would be measured in kilograms and distance would be measured in miHimeters. Since all the individual masses in consideration are located centrally width wise, one of the widthwise coordinate of the CG would lie at the center of the track width. The track width for TATA 2518 IS 2260 MM. Hence the width of the masses need not be considered in the calculation of CG.
-27-
1. Foam Tank (1000 Liters Capacity)
weight of foam + weight of empty tank = 1500 kgs
size of the tank (L X H X W) = 800 X 1000 X 1400 mm
The position of CG would be = {1/2 (L), 1/z (H)} = (400,500).
The location is shown in the picture Figure 3(a).
2. Water Tank (4000 Liters Capacity)
weight of water + weight of empty tank = 5000 kgs
size of the tank (LXHxw) = 3000 x 1000 x 1400 mm
The position of CG would be = {Va (L), Vi (H)} - (1500,500).
The location is shown in the picture Figure 3(b)
-28-
3. Hydraulic Platform (500 kgs UDL (Un Divided Load) Capacity)
weight of platform + load = 2500 kgs
size of the extended platform
(L X H X W) = 1500 X 8000 X 2400 mm
size of the collapsed platform (LXHXW) = 1500 X 1300 X 2400 mm
Since the platform is a rectangular structure in extended and collapsed condition, the position of CG in would be:
{V2 (L), Yi (H)} = (750 X 4000) in extended condition {y2 (L), y2 (H)} = (750 X 650) in collapsed condition
The location is shown in the picture Figure 3 (c)
-29-
4. Chassis + Cowl (TATA 2518)
wheelbase (distance) = 4880 mm
bare kerb weight of the chassis = 6500 kg
front axle weight = 1650 kg
rear axle weight = 3850 kg
ratio of weight division (FA: RA) = 3:7
The weight on truck's front and rear axles is directly proportional to the location of the center of gravity along the truck's wheelbase. It is a direct inverse ratio.
Hence the CG of chassis is located at 70/100 * WB
= 70/100 * 4880= 3420 mm from the center of front axle along the wheelbase.
The position is shown in the picture Figure 3(d).
-30-
5. Center of Gravity - Platform Raised to Full Height
To calculate the CG of the whole unit, we shall project the above individual masses on same plate as shown Figure 3(d).
From the above Figure:
mO = 6500 kg x 0 = 4135 mm
ml = 1500 kg x 1 = 1500 mm
m2 = 5000 kg x 2 = 3500 mm
m3 = 2500 kg x 3 = 5841 mm
Substituting the values in the above equation, we obtain the position of CG on X-Axis = 3950 mm

mO = 6500 kg
mi = 1500 kg
m2 = 5000 kg
m3 = 2500 kg
yO = 0550 mm yl = 1700 mm y2 = 1700 mm y3 = 5206 mm
-31-
Substituting the values in the above equation, we obtain the position of CG on Y-
Axis = 1720 mm.
The position of CG (3950,1720) is shown in Figure 3(e).
6. Center of Gravity - Platform in Lowered Condition
To calculate the CG of the whole unit, we shall project the above individual masses on same plane as shown in Figure 8.
Xcm - S mix, mjXi + m2x2 + m^
rri| rrii + tri2 + 1TI3
From the figure 7:
mO = 6500 kg
ml = 1500 kg
m2 = 5000 kg
m3 == 2500 kg
x 0 = 4135 mm x 1 = 1500 mm x 2 = 3500 mm x 3 = 5841 mm
-32-
Substituting the values in the above equation, we obtain the position of CG on X-Axis = 3950 mm
mO = 6500 kg
ml = 1500 kg
m2 = 5000 kg
m3 = 2500 kg x 3
yO = 0550 mm yl = 1700 mm y2 = 1700 mm y3 = 1891 mm
Substituting the values in the above equation, we obtain the position of CG on Y-Axis = 1185 mm
The position of CG (3950,1185) is shown in the Figure 3(f)-
-33-
WE CLAIM
1. An improved fire-tender for high-rise fire fighting and rescue operation on
narrow / congested roads comprising an elevating hydraulic platform
mounted on a fire tender characterized in that said fire-tender is provided
with a builWn pump and tanks for storing extinguishing media; and in
that said elevating platform is capable of being raised vertically to the
desired height for fire fighting and rescue operation.
2. The fire-tender as claimed in claim 1, wherein said elevating hydraulic
platform can be raised for rescue operation and fire fighting upto a height
of approximately 27 to 30 ft.
3. The fire-tender as claimed in claim 2, wherein an extension ladder is
provided for extending the elevated height of the platform by about 30 ft
for rescue operation.
-34-
4. The fire-tender as claimed in claim 1, wherein the capacity of the pump
for supplying extinguishing media is 3000 LPM at a normal pressure of 7
kg per cm2 and 250 / 300 LPM at a high pressure of 40 / 35 kg / cm2.
'V"
5. The fire-tender as claimed in claim \t wherein said tanks for extinguishing
media comprise a water tank of 4000 liter capacity and a foam tank of
1000 liter capacity.
6. The fire-tender as claimed in claim 1, wherein a carrying cage and a
water / foam monitor are provided mounted on said elevating hydraulic
platform.
7. The fire-tender as claimed in claim 6, wherein the capacity of said water
foam monitor is 2500 LPM.
8. The fire-tender as claimed in claim 1, wherein said fire-tender is provided
with arrangements for storing all required equipment like fire
extinguishing, hoses, and other access.
-35-
9. The fire-tender as claimed in claim 1, wherein said fire tender is provided
with required accessories like a towing hook, siren and PA system, and
fog lamp.
10. An improved fire-tender for high-rise fire fighting and rescue operation on
narrow / congested roads, substantially as herein described and
illustrated in the accompanying drawings.
This and other objects of the present invention are achieved by providing a hydraulically operated retractable elevated platform which can rise vertically upto a height of about 27 - 30 feet shooting water / foam under pressure upto a height of three storeys, maintaining the center of gravity.
The unique design of the elevating hydraulic platform mounted on a conventional fire tender operates without disturbing the center of gravity. It is provided with built in pump and storage tank for extinguishing media for fire fighting.
The design allows the fire tender with retracted platform to move into lanes / road where standard elevated systems cannot enter or operate. This hydraulic platform will elevate to a height of approx 27 - 30 feet and shoot the water / foam into the fire even up to three storeys. The height of the elevated platform can further be extended by about 30 ft using an extension ladder. Pressure of water / foam will be of high standards, compared to the old practice of connecting of number of hoses to hydrant connections at the base level. This can also be utilized as a rescue platform.
Thus the present invention provides an improved fire-tender for high-rise fire fighting and rescue operation on narrow / congested roads comprising an elevating hydraulic platform mounted on a fire tender characterized in that said fire-tender is provided with a built-in pump and tanks for storing extinguishing media; and in that said elevating platform is capable of being raised vertically to the desired height for fire fighting and rescue operatio
The main object of the present invention therefore, is to provide a fire tender which can enter narrow roads and congested areas for both high rise fire fighting and rescue operation.

Documents:

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Patent Number

272203

Indian Patent Application Number

497/KOL/2006

PG Journal Number

14/2016

Publication Date

01-Apr-2016

Grant Date

21-Mar-2016

Date of Filing

25-May-2006

Name of Patentee

TATA STEEL LIMITED.

Applicant Address

RESEARCH AND DEVELOPMENT DIVISION JAMSHEDPUR-831001

Inventors:

#	Inventor's Name	Inventor's Address
1	RAMAN, S.P.	TATA STEEL LIMITED RESEARCH AND DEVELOPMENT DIVISION JAMSHEDPUR-831001
2	MACDONALD D.P.	TATA STEEL LIMITED. RESEARCH AND DEVELOPMENT DIVISION JAMSHEDPUR-831001
3	CHOUDHARY A.K.	TATA STEEL LIMITED RESEARCH AND DEVELOPMENT DIVISION JAMSHEDPUR-831001
4	SINGH, KRANTI	TATA STEEL LIMITED. RESEARCH AND DEVELOPMENT DIVISION JAMSHEDPUR-831001
5	PILLAI A.B.	TATA STEEL LIMITED. RESEARCH AND DEVELOPMENT DIVISION JAMSHEDPUR-831001

PCT International Classification Number

A62C 31/28

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA