Title of Invention	MODULAR WELL FOR RAIN WATER HARVESTING
Abstract	A modular well, particularly a modular well for rain water harvesting and more particularly a modular well for a borewell recharging system. It consists of at least one module (1a) comprising a plurality of flat vertical elements (2) arranged together side by side in close contact with one another in an endless configuration between a flat bottom element (3) and a flat top element (4) to describe an empty storage space within. The elements are provided with holding means to hold them together. The sidewalls of the vertical elements are chamfered to maintain close contact between the sidewalls of the adjacent vertical elements. The top element is provided with a centre opening and lid (9) for the opening therein. All the elements and the lid are made of mechanically strong corrosion resistant, durable and non-porous material.

Title of Invention

MODULAR WELL FOR RAIN WATER HARVESTING

Abstract

A modular well, particularly a modular well for rain water harvesting and more particularly a modular well for a borewell recharging system. It consists of at least one module (1a) comprising a plurality of flat vertical elements (2) arranged together side by side in close contact with one another in an endless configuration between a flat bottom element (3) and a flat top element (4) to describe an empty storage space within. The elements are provided with holding means to hold them together. The sidewalls of the vertical elements are chamfered to maintain close contact between the sidewalls of the adjacent vertical elements. The top element is provided with a centre opening and lid (9) for the opening therein. All the elements and the lid are made of mechanically strong corrosion resistant, durable and non-porous material.

Full Text	FORM 2 THE PATENTS ACT, 1970 (39 of 1970) As amended by the Patents (Amendment) Act, 2005 & The Patents Rules, 2003 As amended by the Patents (Amendment) Rules, 2005 PROVISIONAL SPECIFICATION (See section 10 and rule 13) TITLE OF THE INVENTION Modular well APPLICANTS Attarwala Habil, 5/D/3 Center Point, Panchvati, Ahmedabad 380 006, Gujarat, India and Attarwala Yusufi, 9th Floor, Sacred Steps, Khanpur, Ahmedabad 380 001, Gujarat, India, both Indian nationals INVENTOR Sharma Dinesh, an Indian National, 33-Gandhi Colony, Model Gram, Ludhiana 141 002, Punjab, India PREAMBLE TO THE DESCRIPTION The following specification describes the invention : FIELD OF INVENTION This invention relates to a modular well. This invention relates particularly relates to a modular well for rain water harvesting and more particularly to a modular well for a bore well recharging system. BACKGROUND OF THE INVENTION Water, which is one of the basic needs for sustaining life, is becoming scarce day by day, especially clean and potable water. Ground water levels are very deep in many regions and are receding further down due to daily extraction of water. Bore wells are used to draw water from water tables deep down in the earth. Due to depletion of ground water levels day by day, effective management of water assumes paramount importance. Rainwater harvesting and recharging of borewells by collecting fresh rain water and introducing it at the source of extraction are economic ways of replenishing water losses and meeting with increasing water requirements. A well is generally constructed around a borewell with masonry work or alternatively with precast cement concrete rings one located above another and grouted together. Construction of both the above types of wells is time consuming and requires mobilization of raw materials on the site and skilled labour. In order to construct the ring type well around a borewell, the discharge line of the borewell will have to be disconnected and the borewell will have to be shut down temporarily. Being very heavy and large in size, handling of the precast rings is difficult and requires increased labour and transportation charges. Maintenance of the above wells is also difficult as they are 2 either in accessible or require ladders or slings to enter the wells and come out of the wells for repairs and cleaning purposes. OBJECTS OF INVENTION An object of the invention is to provide a modular well, particularly a modular well for rain water harvesting and more particularly a modular well for a borewell recharging system, which can be easily assembled on site within reduced time even by unskilled persons. Another object of the invention is to provide a modular well, particularly a modular well for rain water harvesting and more particularly a modular well for a borewell recharging system, which offers flexibility of storage volume. Another object of the invention is to provide a modular well, particularly a modular well for rain water harvesting and more particularly a modular well for a borewell recharging system, which reduces transportation charges and overall cost and is, therefore, economical. Another object of the invention is to provide a modular well, particularly a modular well for rain water harvesting and more particularly a modular well for a borewell recharging system, whose maintenance is easy and convenient. 3 Another object of the invention is to provide a modular well, particularly a modular well for rain water harvesting and more particularly a modular well for a borewell recharging system, which filters and cleans the water. Another object of the invention is to provide a modular well for a borewell recharging system, which can be constructed around a bore well without disconnecting the discharge line of the bore well and without shutting down the bore well. Another object of the invention is to provide a modular well, particularly a modular well for rain water harvesting and more particularly a modular well for borewell recharging system, which can be easily disassembled and reassembled on another site within reduced time even by unskilled persons. DETAILED DESCRIPTION OF THE INVENTION According to the invention there is provided a modular well consisting of at least one module comprising a plurality of flat vertical elements arranged together side by side in close contact with one another in an endless configuration between a flat bottom element and a flat top element to describe an empty storage space within, the elements being provided with holding means to hold them together, the sidewalls of the vertical elements being chamfered to maintain close contact between the sidewalls of the adjacent vertical elements, the top element being provided with a centre opening and a lid for the opening therein, all the elements and the lid being made of mechanically strong corrosion resistant, durable and non- porous material. 4 According to an embodiment of the invention, the modular well further consists of a central pipe vertically fitted in the well, the lower part of the central pipe located within the modular well being perforated, the top end of the central pipe being closed and provided with air vents and the lower end of the central pipe being open and a primary filter bed and a secondary filter bed provided around the central pipe within the modular well one above the other. According to an embodiment of the invention, the modular well consists of two modules constructed one above the other and comprising a bottom module and a top module, the top element of the bottom module constituting the bottom element of the top module also forming a step in the well and the top element of the top module being provided with the lid for the opening therein. According to an embodiment of the invention, the modular well consisting of two modules further consists of a central pipe vertically fitted in the well, the lower part of the central pipe located within the bottom module being perforated, the top end of the central pipe being closed and provided with air vents and the lower end of the central pipe being open, a perforated disc horizontally located against the top element of the bottom module around the central pipe through a hole provided in the perforated disc, a primary filter bed provided on the perforated disc around the central pipe within the top module and a secondary filter bed provided around the lower part of the central pipe within the bottom module. 5 According to another embodiment of the invention, the modular well consists of three modules constructed one above another and comprising a bottom module, middle module and top module, the top element of the bottom module constituting the bottom element of the middle module and the top element of the middle module constituting the bottom element of the top module also forming steps in the well and the top element of the top module being provided with the lid for the opening therein. According to an embodiment of the invention, the modular well consisting of three modules further consists of a central pipe vertically fitted in the module, the lower part of the central pipe located within the bottom module being perforated, the top end of the central pipe being closed and provided with air vents and the lower end of the central pipe being open, a perforated disc horizontally located against the bottom element of the top module around the central pipe through a hole provided in the perforated disc, a primary filter bed provided on the perforated disc around the central pipe within the top module and a secondary filter bed provided around the lower part of the central pipe within the bottom module. According to the invention there is also provided a modular well for a borewell recharging system, the said modular well consisting of atleast one module constructed around a bore well and comprising a plurality of flat vertical elements arranged together side by side in close contact with one another in an endless configuration between a flat bottom element and a flat top element to describe an empty storage space within, the elements being provided with holding means to hold Y.' them together, the sidewalls of the vertical elements being chamfered to maintain close contact between the sidewalls of the adjacent vertical elements, the top element being provided with a 6 centre opening and a lid for the opening therein, portion of the casing pipe of the bore well located within the modular well being perforated and a primary filter bed and a secondary filter bed provided in the module around the casing pipe one above the other, all the elements and the lid being made of mechanically strong, corrosion resistant, durable and non-porous material. According to the invention there is also provided a modular well for a borewell recharging system, the modular well consisting of two modules constructed around a borewell one above the other and comprising a bottom module and a top module, each of the modules comprising a plurality of flat vertical elements arranged together side by side in close contact with one another in an endless configuration between a flat bottom element and a flat top element to describe an empty storage space within, the elements being provided with holding means to hold them together, the sidewalls of the vertical elements being chamfered to maintain close contact between the sidewalls. of the adjacent vertical elements, the top element of the top module being provided with a centre opening and a lid for the opening therein, the top element of the bottom module constituting the bottom element of the top module also forming a step in the well, portion of the casing pipe of the borewell located in the bottom module being perforated, the casing pipe being closed at the top and provided with air vents and open at the bottom, a perforated disc horizontally located against the top element of the bottom module around the central pipe through a hole provided in the perforated disc, a primary filter bed provided on the perforated disc around the casing pipe of the borewell within the top module, a secondary filter bed provided around the perforated portion of the casing pipe of the borewell within the bottom module, all the elements and the lid being made of mechanically strong corrosion resistant, durable and non- porous material. 7 According to the invention there is also provided a modular well for a borewell recharging system, the said modular well consisting of three modules constructed one above another and comprising a bottom, middle and top module, each of the modules comprising a plurality of flat vertical elements arranged together side by side in close contact with one another in an endless configuration between a flat bottom element and a flat top element to describe an empty storage space within, the elements being provided with holding means to hold them together, the sidewalls of the vertical elements being chamfered to maintain close contact between the sidewalls of the adjacent vertical elements, the top element of the top module being provided with a centre opening and a lid for the opening therein, the top element of the bottom module constituting the bottom element of the middle module and the top element of the middle module constituting the bottom element of the top module also forming steps in the well, portion of the casing pipe of the borewell located within the bottom module being perforated, the casing pipe being closed at the top and provided with air vents and open at the bottom, a perforated disc horizontally located against the bottom element of the top module around the casing pipe of the bore well through a hole provided in the perforated disc, a primary filter bed provided on the perforated disc around the casing pipe of the borewell within the top module and a secondary filter bed provided around the perforated portion of the casing pipe of the borewell within the bottom module, all the elements and the lid being made of mechanically strong corrosion resistant, durable and non- porous material. The following is a detailed description of the invention with reference to the accompanying drawings, in which : 8 Figs 1 and 2 are isometric view and sectional view of a modular well according to an embodiment of the invention, respectively; Fig 3 is an enlarged scrap section at X in Fig 2; Fig 4 is bottom view or top view of the bottom element or top element of the modular well of Fig 1; Fig 5 is isometric view of a vertical element of the modular well of Fig 1; Fig 6 is the bottom view or top view of the vertical element of Fig 4; Figs 7 and 8 are isometric view and sectional view of a modular well according to another embodiment of the invention, respectively; Figs 9 and 10 are isometric view and sectional view of a modular well according to another embodiment of the invention respectively; Fig 11 is sectional view of a modular well according to another embodiment of the invention; Fig 12 is isometric view of the central pipe of the modular well of Fig 11. Fig 13 is sectional view of a modular well according to another embodiment of the invention; 9 Fig 14 is sectional view of a modular well according to another embodiment of the invention; Fig 15 is sectional view of a modular well constructed around a borewell according to an embodiment of the invention; Fig 16 is a sectional view of a modular well constructed around a borewell according to another embodiment of the invention; and Fig 17 is sectional view of a modular well constructed around a borewell according to another embodiment of the invention; The modular well as illustrated in Figs 1 to 6 of the accompanying drawings comprises a single module la comprising flat vertical elements 2 arranged together side by side in close contact with one another in an endless configuration between a flat bottom element 3 and a flat top element 4 to describe an empty storage space 5 within. To facilitate mass production and reduce production time, the top and bottom elements each is made similar in construction and is provided with center opening 3a therein. The bottom element need not, however, have the center opening. Both the bottom and top elements are provided with equidistantly spaced semispherical recesses 6 at the lower and upper surfaces thereof. The lower and upper surfaces of each of the vertical elements is provided with correspondingly equidistantly spaced semispherical recesses 7 at the lower and upper surfaces thereof. The module is constructed on site in a pit (not shown) already formed in the earth by locating the bottom element at the bottom of the pit. The vertical elements are held 10 onto the bottom element by inserting spherical balls 8 in each of the semispherical recesses at the upper surface of the bottom element and corresponding semispherical recess at the lower surface of each of the vertical elements. The top element is held onto the vertical elements by inserting spherical balls 8 in each of the semispherical recesses at the upper surface of each of the vertical elements and corresponding semispherical recesses at the lower surface of the top element. The spherical balls comprise hard materials like stainless steel or marbles. The module remains in position in the pit against the side wall of the pit under gravity and under the influence of the earth forces. 9 is a lid for the opening in the top element. The opening in the top element may be provided with a step (not shown) corresponding to the lid so as to locate the lid over the opening in the top element. All the elements including the lid are made of mechanically strong corrosion resistant, durable and non-porous material. Preferably the elements and the lid are precast with cement concrete or reinforced cement concrete. The elements and the lid can also be made of any other mechanically strong corrosion resistant, durable and non-porous material such as plastics, metals or composite materials. The side walls of the vertical elements are chamfered to maintain close contact between adjacent vertical elements. In order to facilitate handling, the bottom and top elements each may be made in two or more parts. Preferably the module comprises eight vertical elements each having 10.75cm height, 5.75cm width and 4.0cm thickness. The sidewalls of the vertical elements are chamfered at 22.5°. The bottom and top elements each is octagonal shaped and is having thickness of 5.0cm. The vertical elements are arranged octagonally to form an octagonal shaped module as shown in Figs 1 and 2. An octagonal shaped module comprising eight vertical elements having the above dimensions can give a storage volume of about 1600 litres. Rain water is collected in the modular well. 11 The modular well as illustrated in Figs 7 and 8 of the accompanying drawings comprises two modules namely a bottom module lb and a top module 1c. Each of the modules is similar in construction as the module of Fig 1. The top element of the bottom module constituting the bottom element of the top module also forms a step 10a in the well as is seen in Fig 8 of the drawings. The top element of the top module is provided with the lid. The modular well as illustrated in Figs 9 and 10 of the accompanying drawings comprises three modules namely a bottom module Id, middle module le and top module If each of which is similar in construction as the module of Fig 1. The top element of the bottom module constituting the bottom element of the middle module and the top element of the middle module constituting the bottom element of the top module also form steps 10b and 10c in the well as can be seen in Fig 10. The top element of the top module is provided with the lid. The modular well as shown in Fig 11 of the accompanying drawings consists of a single module 1g similar to that of Figs 1 to 6. The module 1g also consists of a central pipe 11a vertically fitted in the well (also refer Fig 12 of the accompanying drawings). The lower part of the central pipe located within the modular well is perforated (perforated portion marked 12a). The top end of the central pipe is closed and is provided with air vents 13a and the lower end of the central pipe is open. 14a and 14b are primary and secondary filter beds provided around the central pipe within the modular well one above the other. Rain water with impurities is lead or fed into the modular well and is allowed to percolate down through the filter bed in the well. Filtered water enters the central pipe through the perforated portion 12a thereof and is collected at the open lower end thereof. 12 The modular well as shown in Fig 13 of the accompanying drawings consists of two modules 1h and 1i similar to the modules 1b and 1c, respectively of Figs 7 and 8. The modular well of Fig 13 further consists of a central pipe 1 lb vertically fitted in the well. The lower part of the central pipe located within the bottom module is perforated (perforated portion marked 12b). The top end of the central pipe is closed and is provided air vents 13b and the lower end of the central pipe is open. 15 is a perforated disc horizontally located against the top element of the bottom module around the central pipe through a hole (not shown) provided in the perforated disc. Perforations in the disc are marked 15a. 14a is a primary filter bed provided on the perforated disc around the central pipe within the top module. 14b is a secondary filter bed provided around the lower part of the central pipe within the bottom module. Rain water with impurities is led or fed to the modular well and allowed to percolate down into the bottom module through the filter bed in the top module via the perforations in the perforated disc. Water in the bottom module further percolates down through the filter bed in the bottom module into the central pipe via the perforated portion of the lower part of the central pipe. Filtered water is collected at the open lower end of the central pipe. The modular well as shown in Fig 14 of the accompanying drawings consists of 3 modules 1j, 1k and 1l similar to the modules Id, le and If respectively of Figs 9 and 10. The modular well also consists of a central pipe lie vertically fitted in the well. The lower part of the central pipe located within the bottom module is (perforated portion marked 12c). The top end of the central pipe is closed and is provided with air vents 13c and the lower end of the central pipe is open. 15 is a perforated disc horizontally located against the bottom element of the top module around the 13 central pipe through a hole (not shown) provided in the perforated disc. Perforations in the disc are marked 15a. 14a is a primary filter bed provided on the perforated disc around the central pipe within the top module. 14b is a secondary filter bed provided around the lower part of the central pipe within the bottom module. Rain water with impurities flows down through the modular well and filtered water is available at the open lower end of the central pipe as described earlier. The modular well lm as illustrated in Fig 15 of the accompanying drawings is similar to that of Fig 11 (without the central pipe) built around a bore well (not shown). The suction pipe and casing pipe of the borewell are marked 16 and 17 respectively. Portion of the casing pipe located within the modular well is perforated (perforated portion marked 17a). Filtered water flows down into the casing pipe via the perforated portion thereby making available filtered water at the source of extraction for being pumped up by the borewell. The modular wells as illustrated in Figs 16 and 17 of the accompanying drawings are similar to those of Figs 13 and 14 respectively (with but the central pipes) built around a borewell (not shown). The modules of the modular well of Fig 16 are marked 1n and 1p. The suction pipe and casing pipe of the respective borewell are marked 16 and 17 respectively. The perforated portion of the casing pipe is marked 17a. The modules of the modular well of Fig 17 are marked lq, 1r and Is. The suction pipe and casing of the respective borewell are marked 16 and 17, respectively. The perforated portion of the casing pipe is marked 17a. As described earlier filtered water flows down into the casing pipe via the perforated portion thereof thereby making available filtered water at the source of extraction for being pumped up by the borewell. 14 According to the invention the modular well comprises flat and compact elements which can be transported in the knocked down condition and can be easily and conveniently assembled on site even by unskilled persons within a short duration. After erection on one site, the modular well can also be, if required, disassembled and reassembled on another site easily and conveniently even by unskilled persons within a short duration. The size and dimensions of the elements are such that they can be easily and conveniently handled and can be accommodated within reduced area. The height of the vertical elements is less than the normal height of an average man. Therefore, handling of the vertical element is further convenient and easy. The bottom and top elements each can be made in two or more parts to render transportation and handling easier and more convenient. Because the elements are not very heavy and large in size even primitive transports like bullock carts can be used to transport the elements to remote and inaccessible villages or rural areas. The modular well can be constructed by simply locating the bottom elements against the bottom of the pit, inserting spherical balls in the semispherical recesses at the upper surface of the bottom element, engaging the semispherical recesses at the lower surface of the vertical elements over the spherical balls in the semispherical recesses at the upper surface of the bottom element, inserting spherical balls in the semispherical recesses at upper surface of the vertical elements and engaging the semispherical recesses at the lower surface of the top element over the semispherical balls at the upper surface of the vertical elements. The joints between the elements may be grouted if necessary. The modular construction of the well also gives the advantage and flexibility of increasing the storage volume by correspondingly increasing the size of each module and also the number of modules. There can be more than three modules for the modular well. The modular well can be easily and conveniently constructed around a borewell, even an existing borewell. As the modular well is constructed by arranging the vertical elements around the borewell and as the 15 top and bottom elements can be in two or more pieces and can be located around the borewell from the sides, the modular well can be constructed without disconnecting the discharge line of the borewell and without shutting down the borewell. The filter bed(s) is/are optional and the modular well optionally filters the water. As the height of a single module is less than the height of an average man, a workman can enter the modular well comprising a single module easily for repairs and maintenance. In the case of a multi module well, the steps in the modular well make it convenient and easy for a workman to climb down into the well and climb up out of the well. Therefore, a multi module well can also be easily accessed and repaired and cleaned. Change of filter bed is thus easy and convenient. In the case of a modular well comprising elements which are precast with cement concrete or reinforced cement concrete there is considerable cost reduction. As the cost of the elements and the transportation cost of the elements and also the cost of making the modular wells is reduced, the overall cost of the well is reduced and the well works out to be very economical especially for the underprivileged living in the rural areas and villages. The modular well is essentially for water, especially for harvesting rain water and more particularly for a borewell recharging system. It can also be used for handling any other liquid. The holding means may be of a different construction. The lid is optional. The bottom and top elements can be single piece construction. The modules need not be octagonal. Such variations of the invention are obvious to those skilled in the art and are to be construed and understood to be within the scope of the invention. Dated this 14in day of August 2006 16

Full Text

FORM 2
THE PATENTS ACT, 1970 (39 of 1970)
As amended by the Patents (Amendment) Act, 2005
&
The Patents Rules, 2003
As amended by the Patents (Amendment) Rules, 2005
PROVISIONAL SPECIFICATION
(See section 10 and rule 13)
TITLE OF THE INVENTION
Modular well
APPLICANTS
Attarwala Habil, 5/D/3 Center Point, Panchvati, Ahmedabad 380 006, Gujarat, India and Attarwala Yusufi, 9th Floor, Sacred Steps, Khanpur, Ahmedabad 380 001, Gujarat, India, both Indian nationals
INVENTOR
Sharma Dinesh, an Indian National, 33-Gandhi Colony, Model Gram, Ludhiana 141 002, Punjab, India
PREAMBLE TO THE DESCRIPTION
The following specification describes the invention :

FIELD OF INVENTION
This invention relates to a modular well.
This invention relates particularly relates to a modular well for rain water harvesting and more particularly to a modular well for a bore well recharging system.
BACKGROUND OF THE INVENTION
Water, which is one of the basic needs for sustaining life, is becoming scarce day by day, especially clean and potable water. Ground water levels are very deep in many regions and are receding further down due to daily extraction of water. Bore wells are used to draw water from water tables deep down in the earth. Due to depletion of ground water levels day by day, effective management of water assumes paramount importance. Rainwater harvesting and recharging of borewells by collecting fresh rain water and introducing it at the source of extraction are economic ways of replenishing water losses and meeting with increasing water requirements.
A well is generally constructed around a borewell with masonry work or alternatively with precast cement concrete rings one located above another and grouted together. Construction of both the above types of wells is time consuming and requires mobilization of raw materials on the site and skilled labour. In order to construct the ring type well around a borewell, the discharge line of the borewell will have to be disconnected and the borewell will have to be shut down temporarily. Being very heavy and large in size, handling of the precast rings is difficult and requires increased labour and transportation charges. Maintenance of the above wells is also difficult as they are
2

either in accessible or require ladders or slings to enter the wells and come out of the wells for repairs and cleaning purposes.
OBJECTS OF INVENTION
An object of the invention is to provide a modular well, particularly a modular well for rain water harvesting and more particularly a modular well for a borewell recharging system, which can be easily assembled on site within reduced time even by unskilled persons.
Another object of the invention is to provide a modular well, particularly a modular well for rain water harvesting and more particularly a modular well for a borewell recharging system, which offers flexibility of storage volume.
Another object of the invention is to provide a modular well, particularly a modular well for rain water harvesting and more particularly a modular well for a borewell recharging system, which reduces transportation charges and overall cost and is, therefore, economical.
Another object of the invention is to provide a modular well, particularly a modular well for rain water harvesting and more particularly a modular well for a borewell recharging system, whose maintenance is easy and convenient.
3

Another object of the invention is to provide a modular well, particularly a modular well for rain water harvesting and more particularly a modular well for a borewell recharging system, which filters and cleans the water.
Another object of the invention is to provide a modular well for a borewell recharging system, which can be constructed around a bore well without disconnecting the discharge line of the bore well and without shutting down the bore well.
Another object of the invention is to provide a modular well, particularly a modular well for rain water harvesting and more particularly a modular well for borewell recharging system, which can be easily disassembled and reassembled on another site within reduced time even by unskilled persons.
DETAILED DESCRIPTION OF THE INVENTION
According to the invention there is provided a modular well consisting of at least one module comprising a plurality of flat vertical elements arranged together side by side in close contact with one another in an endless configuration between a flat bottom element and a flat top element to describe an empty storage space within, the elements being provided with holding means to hold them together, the sidewalls of the vertical elements being chamfered to maintain close contact between the sidewalls of the adjacent vertical elements, the top element being provided with a centre opening and a lid for the opening therein, all the elements and the lid being made of mechanically strong corrosion resistant, durable and non- porous material.

4

According to an embodiment of the invention, the modular well further consists of a central pipe vertically fitted in the well, the lower part of the central pipe located within the modular well being perforated, the top end of the central pipe being closed and provided with air vents and the lower end of the central pipe being open and a primary filter bed and a secondary filter bed provided around the central pipe within the modular well one above the other.
According to an embodiment of the invention, the modular well consists of two modules constructed one above the other and comprising a bottom module and a top module, the top element of the bottom module constituting the bottom element of the top module also forming a step in the well and the top element of the top module being provided with the lid for the opening therein.
According to an embodiment of the invention, the modular well consisting of two modules further consists of a central pipe vertically fitted in the well, the lower part of the central pipe located within the bottom module being perforated, the top end of the central pipe being closed and provided with air vents and the lower end of the central pipe being open, a perforated disc horizontally located against the top element of the bottom module around the central pipe through a hole provided in the perforated disc, a primary filter bed provided on the perforated disc around the central pipe within the top module and a secondary filter bed provided around the lower part of the central pipe within the bottom module.
5

According to another embodiment of the invention, the modular well consists of three modules constructed one above another and comprising a bottom module, middle module and top module, the top element of the bottom module constituting the bottom element of the middle module and the top element of the middle module constituting the bottom element of the top module also forming steps in the well and the top element of the top module being provided with the lid for the opening therein.
According to an embodiment of the invention, the modular well consisting of three modules further consists of a central pipe vertically fitted in the module, the lower part of the central pipe located within the bottom module being perforated, the top end of the central pipe being closed and provided with air vents and the lower end of the central pipe being open, a perforated disc horizontally located against the bottom element of the top module around the central pipe through a hole provided in the perforated disc, a primary filter bed provided on the perforated disc around the central pipe within the top module and a secondary filter bed provided around the lower part of the central pipe within the bottom module.
According to the invention there is also provided a modular well for a borewell recharging system, the said modular well consisting of atleast one module constructed around a bore well and comprising a plurality of flat vertical elements arranged together side by side in close contact with one another in an endless configuration between a flat bottom element and a flat top element to
describe an empty storage space within, the elements being provided with holding means to hold
Y.' them together, the sidewalls of the vertical elements being chamfered to maintain close contact
between the sidewalls of the adjacent vertical elements, the top element being provided with a
6

centre opening and a lid for the opening therein, portion of the casing pipe of the bore well located within the modular well being perforated and a primary filter bed and a secondary filter bed provided in the module around the casing pipe one above the other, all the elements and the lid being made of mechanically strong, corrosion resistant, durable and non-porous material.
According to the invention there is also provided a modular well for a borewell recharging system, the modular well consisting of two modules constructed around a borewell one above the other and comprising a bottom module and a top module, each of the modules comprising a plurality of flat vertical elements arranged together side by side in close contact with one another in an endless configuration between a flat bottom element and a flat top element to describe an empty storage space within, the elements being provided with holding means to hold them together, the sidewalls of the vertical elements being chamfered to maintain close contact between the sidewalls. of the adjacent vertical elements, the top element of the top module being provided with a centre opening and a lid for the opening therein, the top element of the bottom module constituting the bottom element of the top module also forming a step in the well, portion of the casing pipe of the borewell located in the bottom module being perforated, the casing pipe being closed at the top and provided with air vents and open at the bottom, a perforated disc horizontally located against the top element of the bottom module around the central pipe through a hole provided in the perforated disc, a primary filter bed provided on the perforated disc around the casing pipe of the borewell within the top module, a secondary filter bed provided around the perforated portion of the casing pipe of the borewell within the bottom module, all the elements and the lid being made of mechanically strong corrosion resistant, durable and non- porous material.
7

According to the invention there is also provided a modular well for a borewell recharging system, the said modular well consisting of three modules constructed one above another and comprising a bottom, middle and top module, each of the modules comprising a plurality of flat vertical elements arranged together side by side in close contact with one another in an endless configuration between a flat bottom element and a flat top element to describe an empty storage space within, the elements being provided with holding means to hold them together, the sidewalls of the vertical elements being chamfered to maintain close contact between the sidewalls of the adjacent vertical elements, the top element of the top module being provided with a centre opening and a lid for the opening therein, the top element of the bottom module constituting the bottom element of the middle module and the top element of the middle module constituting the bottom element of the top module also forming steps in the well, portion of the casing pipe of the borewell located within the bottom module being perforated, the casing pipe being closed at the top and provided with air vents and open at the bottom, a perforated disc horizontally located against the bottom element of the top module around the casing pipe of the bore well through a hole provided in the perforated disc, a primary filter bed provided on the perforated disc around the casing pipe of the borewell within the top module and a secondary filter bed provided around the perforated portion of the casing pipe of the borewell within the bottom module, all the elements and the lid being made of mechanically strong corrosion resistant, durable and non- porous material.
The following is a detailed description of the invention with reference to the accompanying drawings, in which :
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Figs 1 and 2 are isometric view and sectional view of a modular well according to an embodiment of the invention, respectively;
Fig 3 is an enlarged scrap section at X in Fig 2;
Fig 4 is bottom view or top view of the bottom element or top element of the modular well of Fig 1;
Fig 5 is isometric view of a vertical element of the modular well of Fig 1;
Fig 6 is the bottom view or top view of the vertical element of Fig 4;
Figs 7 and 8 are isometric view and sectional view of a modular well according to another embodiment of the invention, respectively;
Figs 9 and 10 are isometric view and sectional view of a modular well according to another embodiment of the invention respectively;
Fig 11 is sectional view of a modular well according to another embodiment of the invention;
Fig 12 is isometric view of the central pipe of the modular well of Fig 11.
Fig 13 is sectional view of a modular well according to another embodiment of the invention;
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Fig 14 is sectional view of a modular well according to another embodiment of the invention;
Fig 15 is sectional view of a modular well constructed around a borewell according to an embodiment of the invention;
Fig 16 is a sectional view of a modular well constructed around a borewell according to another embodiment of the invention; and
Fig 17 is sectional view of a modular well constructed around a borewell according to another embodiment of the invention;
The modular well as illustrated in Figs 1 to 6 of the accompanying drawings comprises a single module la comprising flat vertical elements 2 arranged together side by side in close contact with one another in an endless configuration between a flat bottom element 3 and a flat top element 4 to describe an empty storage space 5 within. To facilitate mass production and reduce production time, the top and bottom elements each is made similar in construction and is provided with center opening 3a therein. The bottom element need not, however, have the center opening. Both the bottom and top elements are provided with equidistantly spaced semispherical recesses 6 at the lower and upper surfaces thereof. The lower and upper surfaces of each of the vertical elements is provided with correspondingly equidistantly spaced semispherical recesses 7 at the lower and upper surfaces thereof. The module is constructed on site in a pit (not shown) already formed in the earth by locating the bottom element at the bottom of the pit. The vertical elements are held
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onto the bottom element by inserting spherical balls 8 in each of the semispherical recesses at the upper surface of the bottom element and corresponding semispherical recess at the lower surface of each of the vertical elements. The top element is held onto the vertical elements by inserting spherical balls 8 in each of the semispherical recesses at the upper surface of each of the vertical elements and corresponding semispherical recesses at the lower surface of the top element. The spherical balls comprise hard materials like stainless steel or marbles. The module remains in position in the pit against the side wall of the pit under gravity and under the influence of the earth forces. 9 is a lid for the opening in the top element. The opening in the top element may be provided with a step (not shown) corresponding to the lid so as to locate the lid over the opening in the top element. All the elements including the lid are made of mechanically strong corrosion resistant, durable and non-porous material. Preferably the elements and the lid are precast with cement concrete or reinforced cement concrete. The elements and the lid can also be made of any other mechanically strong corrosion resistant, durable and non-porous material such as plastics, metals or composite materials. The side walls of the vertical elements are chamfered to maintain close contact between adjacent vertical elements. In order to facilitate handling, the bottom and top elements each may be made in two or more parts. Preferably the module comprises eight

vertical elements each having 10.75cm height, 5.75cm width and 4.0cm thickness. The sidewalls of the vertical elements are chamfered at 22.5°. The bottom and top elements each is octagonal shaped and is having thickness of 5.0cm. The vertical elements are arranged octagonally to form an octagonal shaped module as shown in Figs 1 and 2. An octagonal shaped module comprising eight vertical elements having the above dimensions can give a storage volume of about 1600 litres. Rain water is collected in the modular well.
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The modular well as illustrated in Figs 7 and 8 of the accompanying drawings comprises two modules namely a bottom module lb and a top module 1c. Each of the modules is similar in construction as the module of Fig 1. The top element of the bottom module constituting the bottom element of the top module also forms a step 10a in the well as is seen in Fig 8 of the drawings. The top element of the top module is provided with the lid.
The modular well as illustrated in Figs 9 and 10 of the accompanying drawings comprises three modules namely a bottom module Id, middle module le and top module If each of which is similar in construction as the module of Fig 1. The top element of the bottom module constituting the bottom element of the middle module and the top element of the middle module constituting the bottom element of the top module also form steps 10b and 10c in the well as can be seen in Fig 10. The top element of the top module is provided with the lid.
The modular well as shown in Fig 11 of the accompanying drawings consists of a single module 1g similar to that of Figs 1 to 6. The module 1g also consists of a central pipe 11a vertically fitted in the well (also refer Fig 12 of the accompanying drawings). The lower part of the central pipe located within the modular well is perforated (perforated portion marked 12a). The top end of the central pipe is closed and is provided with air vents 13a and the lower end of the central pipe is open. 14a and 14b are primary and secondary filter beds provided around the central pipe within the modular well one above the other. Rain water with impurities is lead or fed into the modular well and is allowed to percolate down through the filter bed in the well. Filtered water enters the central pipe through the perforated portion 12a thereof and is collected at the open lower end thereof.
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The modular well as shown in Fig 13 of the accompanying drawings consists of two modules 1h and 1i similar to the modules 1b and 1c, respectively of Figs 7 and 8. The modular well of Fig 13 further consists of a central pipe 1 lb vertically fitted in the well. The lower part of the central pipe located within the bottom module is perforated (perforated portion marked 12b). The top end of the central pipe is closed and is provided air vents 13b and the lower end of the central pipe is open. 15 is a perforated disc horizontally located against the top element of the bottom module around the central pipe through a hole (not shown) provided in the perforated disc. Perforations in the disc are marked 15a. 14a is a primary filter bed provided on the perforated disc around the central pipe within the top module. 14b is a secondary filter bed provided around the lower part of the central pipe within the bottom module. Rain water with impurities is led or fed to the modular well and allowed to percolate down into the bottom module through the filter bed in the top module via the perforations in the perforated disc. Water in the bottom module further percolates down through the filter bed in the bottom module into the central pipe via the perforated portion of the lower part of the central pipe. Filtered water is collected at the open lower end of the central pipe.
The modular well as shown in Fig 14 of the accompanying drawings consists of 3 modules 1j, 1k and 1l similar to the modules Id, le and If respectively of Figs 9 and 10. The modular well also consists of a central pipe lie vertically fitted in the well. The lower part of the central pipe located within the bottom module is (perforated portion marked 12c). The top end of the central pipe is closed and is provided with air vents 13c and the lower end of the central pipe is open. 15 is a perforated disc horizontally located against the bottom element of the top module around the
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central pipe through a hole (not shown) provided in the perforated disc. Perforations in the disc are marked 15a. 14a is a primary filter bed provided on the perforated disc around the central pipe within the top module. 14b is a secondary filter bed provided around the lower part of the central pipe within the bottom module. Rain water with impurities flows down through the modular well and filtered water is available at the open lower end of the central pipe as described earlier.
The modular well lm as illustrated in Fig 15 of the accompanying drawings is similar to that of Fig 11 (without the central pipe) built around a bore well (not shown). The suction pipe and casing pipe of the borewell are marked 16 and 17 respectively. Portion of the casing pipe located within the modular well is perforated (perforated portion marked 17a). Filtered water flows down into the casing pipe via the perforated portion thereby making available filtered water at the source of extraction for being pumped up by the borewell.
The modular wells as illustrated in Figs 16 and
17 of the accompanying drawings are similar to those of Figs 13 and 14 respectively (with but the central pipes) built around a borewell (not shown). The modules of the modular well of Fig 16 are marked 1n and 1p. The suction pipe and casing pipe of the respective borewell are marked 16 and 17 respectively. The perforated portion of the casing pipe is marked 17a. The modules of the modular well of Fig 17 are marked lq, 1r and Is. The suction pipe and casing of the respective borewell are marked 16 and 17, respectively. The perforated portion of the casing pipe is marked 17a. As described earlier filtered water flows down into the casing pipe via the perforated portion thereof thereby making available filtered water at the source of extraction for being pumped up by the borewell.
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According to the invention the modular well comprises flat and compact elements which can be transported in the knocked down condition and can be easily and conveniently assembled on site even by unskilled persons within a short duration. After erection on one site, the modular well can also be, if required, disassembled and reassembled on another site easily and conveniently even by unskilled persons within a short duration. The size and dimensions of the elements are such that they can be easily and conveniently handled and can be accommodated within reduced area. The height of the vertical elements is less than the normal height of an average man. Therefore, handling of the vertical element is further convenient and easy. The bottom and top elements each can be made in two or more parts to render transportation and handling easier and more convenient. Because the elements are not very heavy and large in size even primitive transports like bullock carts can be used to transport the elements to remote and inaccessible villages or rural areas. The modular well can be constructed by simply locating the bottom elements against the bottom of the pit, inserting spherical balls in the semispherical recesses at the upper surface of the bottom element, engaging the semispherical recesses at the lower surface of the vertical elements over the spherical balls in the semispherical recesses at the upper surface of the bottom element, inserting spherical balls in the semispherical recesses at upper surface of the vertical elements and engaging the semispherical recesses at the lower surface of the top element over the semispherical balls at the upper surface of the vertical elements. The joints between the elements may be grouted if necessary. The modular construction of the well also gives the advantage and flexibility of increasing the storage volume by correspondingly increasing the size of each module and also the number of modules. There can be more than three modules for the modular well. The modular well can be easily and conveniently constructed around a borewell, even an existing borewell. As the modular well is constructed by arranging the vertical elements around the borewell and as the
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top and bottom elements can be in two or more pieces and can be located around the borewell from the sides, the modular well can be constructed without disconnecting the discharge line of the borewell and without shutting down the borewell. The filter bed(s) is/are optional and the modular well optionally filters the water. As the height of a single module is less than the height of an average man, a workman can enter the modular well comprising a single module easily for repairs and maintenance. In the case of a multi module well, the steps in the modular well make it convenient and easy for a workman to climb down into the well and climb up out of the well. Therefore, a multi module well can also be easily accessed and repaired and cleaned. Change of filter bed is thus easy and convenient. In the case of a modular well comprising elements which are precast with cement concrete or reinforced cement concrete there is considerable cost reduction. As the cost of the elements and the transportation cost of the elements and also the cost of making the modular wells is reduced, the overall cost of the well is reduced and the well works out to be very economical especially for the underprivileged living in the rural areas and villages. The modular well is essentially for water, especially for harvesting rain water and more particularly for a borewell recharging system. It can also be used for handling any other liquid. The holding means may be of a different construction. The lid is optional. The bottom and top elements can be single piece construction. The modules need not be octagonal. Such variations of the invention are obvious to those skilled in the art and are to be construed and understood to be within the scope of the invention.
Dated this 14in day of August 2006

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Documents:

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Patent Number

268960

Indian Patent Application Number

1288/MUM/2006

PG Journal Number

40/2015

Publication Date

02-Oct-2015

Grant Date

24-Sep-2015

Date of Filing

17-Aug-2006

Name of Patentee

ATTARWALA HABIL

Applicant Address

5/D/3 CENTER POINT, PANCHVATI, AHMEDABAD-380 006.

Inventors:

#	Inventor's Name	Inventor's Address
1	SHARMA DINESH	33-GANDHI COLONY, MODEL GRAM, LUDHIANA 141 002.

PCT International Classification Number

E03B3/02,E03B3/00

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA