Title of Invention

A CENTER SHUTTER LOCK

Abstract

An improved center shutter lock having a lock case fitted to the door for accommodating lock assembly components , a mounting plate for mounting the lock assembly to the lock case, a cover plate for covering the lock assembly to form a secure housing for the lock and a receptacle fitted in the floor in which the locking bolts of the lock assembly engage for locking the door. The shutter lock is able to withstand a deforming load of 5 tons. 17 OCT 2005

Full Text

FORM-2 THE PATENTS ACT, 1970 (39 of 1970) & THE PATENTS RULES, 2003 COMPLETE Specification (See section 10 and rule 13) A CENTER SHUTTER LOCK JOSHI PRABHAKAR ANANT, an Indian National of J-61, M.I.D.C, Bhosari, Pune 411 026, Maharashtra, India THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES THE INVENTION AND THE MANNER IN WHICH IT IS TO BE PERFORMED. GRANTED ORIGINAL 1110/MUM/2004 8 APR Z008 Field of invention: This invention relates to a rolling shutters. Particularly, this invention relates to a lock of a rolling shutter. Description of prior art: Center Shutter lock is fixed in the center portion of the Rolling Shutter. For, extra wide rolling shutter two extra locks are fitted . The main function of the center lock of the Shutter panel is to prevent it from being opened forcibly using a crowbar Jack or jemmy. Generally, two padlocks are fitted on two sides of rolling shutters. These locks stop the side locking bolts from sliding inwards and prevent lifting of door panel upwards. Center shutter locks, which are presently manufactured are of poor design and are very fragile and weak. They easily break open when brute force is applied to open the door. The design and manufacturing of the prior art center shutter locks have following faults and weaknesses: - 1) Breaking load is very low (about 1000 Kg) and breaking load test is not done. So, the breaking load is not specified on the lock. 2) Locking bolts appear to be very strong from outside but the lock mechanism from inside is very weak and poorly manufactured. 3) Height of lock case is 32 to 45 mm. Hence overhang is more when breaking load is applied, even though lock looks bigger, they are very weak. 4) 4 screws of small diameter without any supporting bush are used for fixing inside the lock case . Hence these weak screws are not able to withstand heavy breaking load. 5) Receptacle of the lock is very weak and it has no sole plate. The side walls are parallel & have no taper. So the receptacle easily comes out when force is applied on the lock. 6) Sheet thicknenss of the receptacle is less only 1mm to 2mm. Hence the receptacle is structurally weak. 7) Lock is of lever type or pin-tumbler type. Hence it is less secure as duplicate keys can be easily made. 8) Lock case is made of sheet metal folded on all 4 sides. Hence it is structurally weak & unable to bear heavy breaking load . 9) Protection box is not provided at the bottom of lock case to protect locking bolts from attack using hacksaw or crowbar. The locking bolts are also exposed when locked. 10) The receptacle is not provided with 2 Anchor bolts. Hence breaking strength is reduced. 11) The Side walls of receptacle are vertically parallel. There is no taper on side walls. Hence the receptacle easily lifts up under heavy breaking load . Primary aim of this invention is to make an improved center lock in which all above listed defects & weaknesses are eliminated and the customer is presented with an ultra safe center lock , resisting breaking loads of even 5 Tons. Summary of invention: Envisaged in accordance with this invention is a shutter lock, the locking bolt of which has rotary movement and with a fool proof toggle locking to lock and unlock the rolling shutter center lock and special design of elements to increase the breaking strength of lock to over 5 ton. The main feature of this invention is the newly designed unique rolling shutter center lock fitted with two rotating locking bolts to lock and unlock. According to this invention there is provided an improved center shutter lock having a lock case fitted to the door for accommodating lock assembly components, a mounting plate for mounting the lock assembly to the lock case, a cover plate for covering the lock assembly to form a secure housing for the lock and a receptacle fitted in the floor in which the locking bolts of the lock assembly engage for locking the door characterized in that it has: [a] at least one lock assembly having 2 Locking bolts having rotary movement mounted with toggle locking to lock and unlock the rolling shutter center lock; and a disc adapted to rotate 6° beyond the horizontal axis and a link , cooperating with the locking bolts said disc and link assembly preventing the locking bolts from rotating inwards and thereby preventing the lock from opening in the locked position; [b] Dead bolt assemblies containing dead bolts pieces designed to take a load of more than 5 tons, the dead bolt pieces being assembled together with rivets, Circlip/s and spacer rivet/s with apertures; [c] threaded rivets, flat rivets and screws provided for fitting the lock case cover plate to the lock case and spacer sleeves riveted to the cover plate to form a firm bond between cover plate and lock case; and [d] the lock case having bent sides on top, left and right to engage with corresponding slots on the cover plate thereby supporting the cover plate and preventing it from slipping and opening out under load. In accordance with a preferred embodiment of the invention, the shutter lock as claimed has hardened bushes to support the cover plate on the lock case. Preferably, the receptacle has a tapered body and is provided with receptacle rods for firmly fixing the receptacle in the ground in an undeformable manner. Preferably, the tapered sides of the lock case complement the tapered edges of the cover plate there by preventing disassembly & slipping of lock case and cover plate. Typically, the lock assembly is spring loaded and has a key assembly connected to the lock assembly via two links . In one embodiment of the invention, two lock assemblies are provided for opening the shutter from the inside or the outside. Preferably, the key assembly is provided with pressure pins to ensure that the key remains intact inside and locators cooperating with pins for locating the key in the key assembly. Preferably, the dead bolts are spring loaded and are provided with a special profile pierced in deadbolt, which allows free swinging of deadbolts but limits their movements. Brief description of the drawings: The invention will now be described with reference to the accompanying drawings in which Figure 1 illustrates an isometric front view of the lock for rolling shutters; Figure 2 illustrates the rear view of the lock of figure 1; Figure 3 illustrates the top view of the lock of figure 1; Figure 4 illustrates the front view of the lock of figure 1; Figure 5 illustrates the sectional top view of the lock of figure 1 taken along line D-D in figure 4; Figure 6 illustrates the sectional side top view of the lock of figure 1 taken along line C-C in figure 4; Figure 7 illustrates the internal arrangement of the lock of figure 1; Figure 8 illustrates the sectional top view of the lock of figure 7 taken along line E-E in figure 4; Figure 9 illustrates the sectional side view of the lock of figure 1 taken along line B-B in figure 7; Figure 10 illustrates the front view of receptacle for the lock of figure 1; Figure 11 illustrates the front view of the lock of figure 1 with receptacle of figure 10; Figure 12 illustrates the side view of the lock of figure 1 with the receptacle of figure 11 mounted on a rolling shutter panel; and Figure 13 illustrates view of the lock of figure 1 with the receptacle of figure 11. Referring to the drawings, the part list of the various reference numerals is as follows: 01 - LOCK CASE 1 A- SLOT IN FRONT PLATE 01B- SLOT IN FRONT PLATE 01C- SLOT IN SIDE FACE OF COVER 2 - COVER PLATE 02A-BENT EDGE OF COVER PATE 3 - TOP DEAD BOLT SPACER L.H. 4 - TOP DEAD BOLT SPACER R.H. 05- DEAD BOLT R.H. 6 - DEAD BOLT L.H. 7 - DEAD BOLT SPACER 8 - LINK 9- DUST COVER 10- MOUNTING PLATE 11- RECEPTACLE-MS 12 - RECEPTACLE SPACER 13 - DISC 13 A-DISC ASSEMBLY 14- CRANK 15- DEAD BOLT RIVET 15A - APERTURE IN FRONT PLATE FOR DEAD BOLT RIVET 15B - APERTURE IN BACK PLATE FOR DEAD BOLT RIVET 16- LINK RIVET 17- FLAT RIVET 17A - APERTURE FOR FLAT RIVET IN FRONT PLATE 17B- APERTURE FOR FLAT RIVET IN BACK PLATE 17C- SPECIAL PROFILE PIERCED IN DEAD BOLT 18- COTTER PIN 19 - LOCATOR IN FRONT PLATE 19A - LOCATOR IN BACK PLATE 20- THREADED RIVET 20A- APERTURE IN FRONT PLATE FOR THREADED RIVET 20B - APERTURE IN BACK PLATE FOR THREADED RIVET 21- DISC RIVET 22- SPACER SLEEVE 22A - CAVITY IN SPACER SLEEVE IN FRONT PLATE 22B - CAVITY IN SPACER SLEEVE IN BACK PLATE 23 - LOCKING SPRING 26 - HOUSING DIMPLE 27 - SPACER RIVET FOR DEAD BOLT 27A - APERTURE FOR SPACER RIVET FOR DEAD BOLT IN FRONT PLATE 27B - APERTURE FOR SPACER RIVET FOR DEAD BOLT IN BACK PLATE 29- CIRCLIPP-370 30 - RECEPTACLE ROD 31- RECEPTACLE BOX 32- SPACER RIVET 32A - APERTURE FOR SPACER RIVET IN FRONT PLATE 32B - APERTURE FOR SPACER RIVET IN BACK PLATE 33- KEY 34- KEYRING 35 - LOCK SPRING 36 - DEAD BOLT 37 - PRESSURE PIN 38-PRESSUREPIN 39 - PRESSURE PIN 40 - PRESSURE PIN 41 - DOUBLE DEAD BOLT RIVET 42 , 43 , 44 , 45 , 46, 47 , 48 - TOP & SIDE LOCKING PINS 49 - DEAD BOLT SPRING L.H. 50 - DEAD BOLT SPRING R.H. 51- HARD BUSH 51A- KEYHOLE 53 - CIRCLIP FOR DEAD BOLT 54- MOUNTING PLATE RIVET 54B - APERTURE FOR MOUNTING PLATE RIVET 55 - PIN FOR LOCATOR 56- ROLLER FOR DISC 59- RIVET FOR DUST COVER 60 - SEALING COVER 61 - COACH SCREW 61 A- APERTURE FOR MOUNTING RIVET 62 - COACH SCREW NUT 64 - SEALING COVER 66 - TOP SEALING COVER FOR INSIDE HOUSING 67 - MOUNTING PLATE RIVET R. H. 67B - APERTURE FOR MOUNTING PLATE RIVET R. H. 71- MOUNTING PLATE RIVET 7lB- APERTURE FOR MOUNTING PLATE 75 - SHUTTER Detailed description of the invention: Referring to the drawings, the two locking bolts (05, 06) are given rotary motion by the lock (which has lock spring (35) inside) and key assembly through two links (08). In addition to the two top dead bolt spacers (03) & (04), one more dead bolt spacer (07) is also provided. When key (33) with key ring (34) is turned, the disc (13) rotates and pushes the two links (08) onwards, which are connected at the other end to the locking bolts (05, 06), therefore the locking bolts rotate outwards and locking takes place as the two locking bolts interlock with the top surface of the receptacle (11) and prevent the door from lifting upwards. Pressure pins (37, 38, 39 & 40) are provided to ensure that the key remains intact inside the lock. A Pin (55) for two locators 19 & 19(a) on the front and back plate is provided. Also top and side locking pins (42, 43, 44, 45, 46, 47, 48) are provided for the key. The lock has a sealing cover (64) & (60) and top sealing cover (66) for inside housing. To unlock the lock the key is rotated in the reverse direction, disc (13) rotates in opposite direction and pulls the two links (08) inwards which in turn pull the locking bolts inwards (which rotate in opposite direction). In retracted position the two locking bolts come out of the receptacle when the door of rolling shutter is lifted upwards. In figure 7, the disc (13) is rotating 6° beyond the horizontal axis, whereby it prevents the lock from opening as the toggle action of the disc (13) and link (08) prevents the locking bolts (05 & 06) from rotating inwards hence even if force us applied externally on the locking bolts (05 & 06) lock will not open thereby the shutter door will remain locked and secure. Figure 11 shows the dust cover (09) with rivet (59). Unique design features are incorporated in the lock assembly to increase the breaking load of the locking bolts to more than 5 tons. Following design feature are incorporated in the lock assembly to increase the breaking load of the lock to more than 5 tons. Refer Figure 7. 1. Bent sides of lock case (01) on top (a), left (b) and right (c) side engage with the top slots (d) and left slot E and right slot F respectively. These bent edges of the lock case support the cover plate (02) and prevent it from slipping out. 2. 4 spacer sleeves (22) are riveted to the cover plate (02). They enter the hole 22(a) & 22(b) of the cover plate and form a firm bond between cover plate and lock case. This assembly prevents the lock case and cover plate from separating when breaking force is applied on lock. 3. 4 threaded rivets (20) (with apertures 20A & 20B in front and back plate) are having tapped holes on tip side. 4 screws are screwed to fix the cover plate (02) on lock case (01). These 4 screws give strength to the lock assembly and prevent the lock from opening. 4. 2 dead bolt rivets (15) and 2 flat rivets (17) enter the holes (15) and holes (17) of the cover plate (02) these 4 rivets gives supports to the cover plate (02) and prevent the lock from opening. Two apertures 17(a) & 17(b) for flat rivet are provided on the front plate. A double dead bolt rivet (41) is also provided with the lock. 5. Bent edge 01 rests against the bent edge 02(a) of cover plate (02) and the prevents disassembly of lock case (01) and cover plate (02). This gives added strength to the lock assembly, prevent the lock from opening. 6. Hard bush (51) enters the plate 51(a) of the cover plate (02) and supports the cover plate from slipping out when force is applied to break upon the lock. All the above design features no. 1 to no. 6 combined provides strength to the lock and prevent the lock from opening even if breaking force of 5 tons are applied on the shutter. The detailed function of various parts is as follows: 1. Lock case - part no 01: This is the main body of the lock, which accommodates all other parts except receptacle assembly. 2. Cover plate - part no 02: This part is used to cover the lock assembly parts by screwing. Two apertures 32(A) & 32 (B) are provided on the front plate and back plate, for a spacer rivet (32). Coach screw (61) and coach screw nut (62) are provided to keep the plates intact. An aperture 61(a) for the mounting rivet of the coach screw is also provided. 3. Dead bolt assembly part no 05, 06: This is the major assembly of lock, which contains three sub assemblies. a) Dead bolt L. H. and Dead bolt R. H. - Part no 06, 05: Each single dead bolt assembly contains 4 dead bolts (36) having 3mn thickness each so the total dead bolt thickness is 12 mm. Which is designed to take a load of more than 5 tons. All these 4 no dead bolt pieces are assembled together with 6 nos. rivets. The rivets diameters, which are selected, are designed to help the lock to take load more than 5 tons. A Circlip (53) is also provided for dead bolt. A spacer rivet (27) with apertures 27(a) & 27(b) is provided for dead bolt in front and back plate. A profile (17c) is formed in deadbolt, which allows free swinging of deadbolts and also limits the movements. The complete dead bolt assembly is Ni Cr plated which is strongly rust proof as the environmental conditions will not affect or limit the use of lock. Two dead bolt springs L.H. and R.H. (49 & 50) are also provided for the dead bolt. b) Disc Assembly 13(a): Disc assembly has roller (56) for the disc. This assembly is used for operating the lock from inside and outside. The profile is so designed that it guides itself in the profile of lock case and also limits its rotation. The other part of assembly is a disc rivet (21), which will not allow the dead bolt to move in reverse direction after locking. The plate for rivet is used to move the disc, and in turn the dead bolts which function from inside. The profile of plate is so designed that it allows a point contact between crank (14) and plate from both sides. Complete disc assembly is Ni - Cr plated to avoid rusting. 4. Link - part no 08: 2 Links are used to connect dead bolts with disc assembly. Links are riveted (16) in dead bolt (36) and disc by keeping minimum clearance for its free rotation. The dead bolts both L.H. & R.H. (05) & (06) are pivoted in the two lock case rivets (15, 15(A), 15(B)), which are riveted in the lock case and also to guide the dead bolts while swinging. Two or other rivets ( 17) are riveted in lock case. 5. Mounting plate- part no 10: This plate is used to locate inside and outside lock assembles in the lock. The plate is riveted (67) after fitting the lock assemblies in the lock. An aperture 67(b) is provided for mounting plate rivet R.H. The plate is riveted after fitting the lock assembly on two lock case rivets (54 & 71). An aperture 54(b) & 71(b) is also provided for mounting plate rivet (54). 6. Lock assembly: Two nos inside and lock assemblies are provided in the lock to operate the lock from inside and outside with common key. 7. Hard bush: Hard brush (51) is fitted in the outside lock assembly area. This is case hardened bush, which does not allow any damages to the lock part by hammering, drilling etc. The material used is 20 MnCr5, which is NI - Cr plated to avoid rusting. The provision of 2 independently operating lock assemblies ensures that the lock can be opened and closed from inside and outside independently using the same key (33). 8. Receptacle [11] (a) receptacle (11) is made from thick MS sheet. Its unique feature is that the 2 sides are given taper so that bottom of receptacle is wider than the top. When concrete is poured in, these 2 tapered sides act as wedge and extra resistance is provided to prevent lifting of receptacle when force is applied with crow bar to lift the shutter (75) door. The receptacle (11) is provided with receptacle spacer (12) on the receptacle box (31). (b) Receptacle box (31) has 2 receptacle Rods (30) are specially provided with cottor pins (18) to be used as hold-fast and anchoring rods while pouring concrete to fix the receptacle and prevents forcible lifting of receptacle as they pull the receptacle downwards from R.H. and L.H. side and prevent it from lifting up. I Claim: [1] A center shutter lock having a lock case (01) fitted to the door for accommodating lock assembly components, a mounting plate (10) for mounting the lock assembly to the lock case, a cover plate (02) for covering the lock assembly to form a secure housing for the lock and a receptacle (11) fitted in the floor in which the locking bolts (05, 06) of the lock assembly engage for locking the door characterized in that it has: [a] at least one lock assembly having 2 Locking bolts(05, 06) having rotary movement mounted with toggle locking to lock and unlock the rolling shutter center lock; and a disc (13) adapted to rotate 6° beyond the horizontal axis and a link (08), cooperating with the locking bolts (05, 06) said disc (13) and link (08) assembly preventing the locking bolts (05, 06) from rotating inwards and thereby preventing the lock from opening in the locked position; [b] Dead bolt assemblies containing dead bolts (05, 06) pieces designed to take a load of more than 5 tons, the dead bolt pieces being assembled together with rivets, Circlip/s and spacer rivet/s with apertures; [c] threaded rivets, flat rivets and screws provided for fitting the lock case cover plate to the lock case and spacer sleeves riveted to the cover plate to form a firm bond between cover plate and lock case; and [d] the lock case having bent sides on top, left and right to engage with corresponding slots on the cover plate thereby supporting the cover plate and preventing it from slipping and opening out under load. [2] A center shutter lock as claimed in claim 1, which has hardened bushes (51) to support the cover plate on the lock case. [3] A center shutter lock as claimed in claim 1, in which the receptacle (11) has a tapered body and is provided with receptacle rods (30) for firmly fixing the receptacle in the ground in an undeformable manner. [4] A center shutter lock as claimed in claim 1, in which the tapered sides of the lock case (01) complement the tapered edges of the cover plate (02) there by preventing disassembly & slipping of lock case and cover plate. [5] A center shutter lock as claimed in claim 1, in which the lock assembly is spring(49, 50) loaded and has a key assembly connected to the lock assembly via two links. [6] A center shutter lock as claimed in claim 1, in which two lock assemblies are provided for opening the shutter from the inside or the outside. [7] A center shutter lock as claimed in claim 5, in which the key assembly is provided with pressure pins (39, 40) to ensure that the key (33) remains intact inside the lock. [8] A center shutter lock as claimed in claim 5, in which the key assembly has locators (19, 19A) cooperating with pins for locating the key in the key assembly. [9] A center shutter lock as claimed in claim 5, in which the dead bolts are spring loaded and are provided with a profile (17C) formed in deadbolt, which allows free swinging of deadbolts but limits their movements. [10] A center shutter lock as described herein with reference to the accompanying drawings. Dated this 15th day of October 2005. Mohan Dewan of R.K.Dewan & Co. Applicant's Patent Attorneys

Documents:

1110-mum-2004-abstract(17-10-2005).doc

1110-mum-2004-abstract(17-10-2005).pdf

1110-mum-2004-cancelled page(08-04-2008).pdf

1110-mum-2004-claim(granted)-(08-04-2008).doc

1110-mum-2004-claim(granted)-(08-04-2008).pdf

1110-mum-2004-correspondence(08-04-2008).pdf

1110-mum-2004-correspondence(ipo)-(14-10-2008).pdf

1110-mum-2004-drawing(17-10-2005).pdf

1110-mum-2004-form 1(15-10-2004).pdf

1110-mum-2004-form 18(08-01-2007).pdf

1110-mum-2004-form 2(granted)-(08-04-2008).doc

1110-mum-2004-form 2(granted)-(08-04-2008).pdf

1110-mum-2004-form 26(15-10-2004).pdf

1110-mum-2004-form 3(15-10-2004).pdf

1110-mum-2004-form 5(17-10-2005).pdf

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