Title of Invention | AN IMPROVED AIR COMPRESSOR |
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Abstract | An improved air compressor consisting of a cylinder with cylinder head provided with a ball type non return air inlet valve and a piston provided with a pluraiity of air passages, a cavity at one end and a threaded central hole, a floating type non return air inlet valve made up of a non metallic carbon filled Poly Tetra Fluoro Ethylene with central hole accommodated in the said cavity of the piston, a washer having a pluraiity of air passages, a non metallic compression ring fitted at one end of the piston at its outer periphery with the help of the said washer ,a screw passing through the said washer and non return air inlet valve engaging into the threaded hole in the piston, a connecting rod attached with a moulded Nylon ring having housing enclosing therein a bearing at one end and external threads at other end for screwing the said connecting rod into the threaded hole in the piston, the said connecting rod being mounted over an eccentric pivot pin fitted to a flywheel and a power transmission system for rotating the said fly wheel. 8 |
Full Text | FORM - 2 THE PATENTS ACT, 1970 COMPLETE SPECIFICATION: SECTION - 10 "AN IMPROVED AIR COMPRESSOR" SAVALIA RAVJ1BHAI MADHABHAI C/o. Savalia Research Centre, Opp. 137, Last Bus Stop, Near Kamdar Kalyan Kendra, New Bapunagar, Ahmedabad - 380 024. Gujarat State, India. The followïng specification particularly describes the nature of this invention and the marmer in which it is to be performed: - This invention relates to "AN IMPROVED AIR COMPRESSOR". More particularly this invention relates to an improved oil-less air compressor provided with a novel piston and connecting rod assembiy, which results into a maintainable, efficiënt, and less noisy air compressor. Currently available oil-less air compressor comprises a cylinder head provided with a pair of finger strip type non return valves, one working as air inlet and other working as air outlet valve, a piston hoving a number of two ended piston rings which are commonly made of self lubricated soft materials working as compression rings. A forged rigid metallic rod connected at one end with the piston, with the help of gudgeon pin and the other end being connected to the flywheel with the help of a bearing. There are many drawbacks of the existing air compressor such as: 1. The finger strip type valves used for air inlet and air outlet are exposé d to the environment which accumulates dust on them resulting air leakage. Thus the existing system requires high maintenance. 2. As the connecting rod used is made up of forged metal, any misalignment results into wear and tear of piston, piston rings and bearings. This enforces to replace piston and piston rings frequently, thus the maintenance is costly. 3. Piston and connecting rod are connected with the help of gudgeon pin. A smal! amount of misalignment results into noisy functioning. So with the motto of obviating all the above-mentioned drawbacks of existing oil-less air compressor, inventor has developed "AN IMPROVED AIR COMPRESSOR". The further object of this invention is to provide "AN IMPROVED AIR COMPRESSOR" having a novel piston and a connecting rod, which is partly flexible as molded ring of nylon, is provided at one end of the rod. This cancels the effects generated due to misalignment of the assembiy. The further object of this invention is to provide AN IMPROVED AIR COMPRESSOR wherein the connecting rod is direcfly 2 connected to the piston without using the gudgeon pin. This eliminates noisy functioning of the assembly. The further object of this invention is to provide AN IMPROVED AIR COMPRESSOR wherein a single expandable ring made up of -self lubricated carbon Poly Tetra Fluoro Ethylene, which is further referred to as PTFE, with spherical outer surface at the one end of the piston to provide leak proof contact and preventing the piston from direct rubbing to the cylinder. The further object of this invention is to provide AN IMPROVED AIR COMPRESSOR wherein finger strip valves are replaced by a ball type air outlet valve provided in cylinder head and a washer shaped floating type non return valve provided in the piston itself to prevent dust accumutation and hence the system requires less maintenance. The further object of this invention is to provide AN IMPROVED AIR COMPRESSOR wherein the piston is modified to have a plurality of air passages and to accommodate a non-return valve providing unidirecfional airflow. Provision of the valves inside the piston itself provides cooling to the piston and compression rings, allowing the air compressor to run for a longer duration. The invention will now be described in more details with reference to the accompanying drawings wherein: Fig.l and 2 show the cross sectional elevation of the existing air compressor, showing the piston motion ïn upward and downward direction respectively. Fig 3 and 4 shows the cross sectional elevation of the improved air compressor, according to an embodiment of this invention. Fig 5 shows the cross sectiona! side view of the improved air compressor. Fig 6 shows the cross section of the compression ring of the improved air compressor. 3 Fig 7 shows the plan of the washer of the improved air compressor. Fig 8 shows the plan of the piston of. the improved air compressor. Fig 9 and 10 shows the cross sectional elevation and plan of the floating type non-return air inlet valve of the improved air compressor. Referring to Fig l and 2, the existing oil less air compressor mainiy comprises of a flywheel (1] having power transmission system for rotating the same. A forged rigid connecting rod (2) is fitted to the flywheel with the help of bearing (3) mounted on an eccentric pivot pin. A piston(4) connected to the connecting rod (2) with the help of gudgeon pin (5), two or move two ended piston nngs (6) are provided in the groeves made in the periphery of the piston. The piston rings are made u p of non-metallic self lubricated soft material and are provided with a step slot at the joint. A pair of finger strip type valves (7 and 8) are provided in the cylinder head (9) which works as air outlet and air inlet valves. In the existing air compressors, the connecting rod (2) being forged rigid rod, in case of misalignment there is a great wear and tear of piston, bearing, piston rings and gudgeon pin (5), which thus increase the maintenance cost. Piston rubs with cylinder walls, which causes over heating. Air inlet and outlet valves accumulate dust and cause leakage besides frequent maintenance. Thus, the existing air compressor requires more maintenance by skilied mechanica! persons. Gudgeon pin (5) on wearïng out causes more noise and piston rings on wearing out cause leakage. These problems are obviated in the improved air compressor as shown in Fig 3 to 10, according to an embodiment of this invention, comprises a cylinder head (11). having fins (12) and a ball type air-outlet valve (13). A piston (14) is provided with a plurality of air passages (15), a central threaded hole (16) and cavity (17) formed at one end in between the projected collar (18). A washer (19) having a central hole (20) is provided with plurality of air passages (21). A washer shaped tloating type non-return air inlet valve (22) preferably made of non metallic carbon filled PTFE material and having a central hole (23) is 4 accommodated in the cavity (17) of the piston (14). A compression ring (24) is preferably made of PTFE, which is expandable in nature. An angular cross section is provided at one end of the piston (14) with the help of a washer (19) and a screw (25) tightened in the threaded hole (16) in the piston (14). The outer periphery of the compression ring (24) is made spherical to provide a point contact with the inner surface of the cylinder (26). A connecting rod (30) attached with a moulded Nylon ring (27) having housing (28) enclosing therein a bearing (29) at one end and external threads (31) at other end. The threads (31) are screwed into threaded hole (16) in the piston (14). A checknut (32) is also provided for tightening of the connecting rod (30) after screwing it into the piston (14). The moulded ring (27) and housing (28) are made up of nylon or any partially flexible plastic. The bearing (29) of the connecting rod (30) is fitted over an eccentric pivot pin (33) of a flywheel (34). The flywheel (34) is provided with power transmission system (Not shown) for rotating the same. Rotary motion of the flywheel (34) causes reciprocating motion of the piston (14) inside the cylïnder (26). When the piston (14) moves upward, air in the space above the piston (14) and in between the washer (19) and cylinder head (11) gets compressed and the floating type non-return inlet (22) closes the air passages (15) in the piston (14). The compressed air opens fhe ball type outlet valve (13) and the air is released. When the piston (14) moves downward, vacuüm is created in between the piston (14) and cylinder head (11). As the ball type air outlet valve (13) is closed, air enters through holes (15) as the return air inlet vaive (22) moves away from the piston (14) and rests over the washer (19). Air passes through holes (21) in the washer (19) and gets filled into the cylinder (26) above of the piston (14). Thus the floating type non return air inlet valve create an unidirectional air flow through the piston (14) which cools the piston (14) and the compression ring (24) and prevents them from overheating, as the inlet air works as coolant. The connecting rod (30) is tightly screwed in the piston (14) without gudgeon pin (5), which permits piston movement inside the cylinder (26) in cross/tilted position. The construction of the compression ring (24) made of carbon filled PTFE having spherical outer surface and outer diameter perfectly matching with inner diameter of the cylinder (26), keeps the airtight 5 1 contact, which prevents any air leakage through the piston (14). Further the compressed air causes the flexible PTFE compression ring (24) remains in the normal condition. The ball type valve (13) does not accumulate dust and thus the system requires less maintenance. Piston. (14) does not come in contact with the cylinder (26) hence less wear and tear makes the system more efficiënt. As there is no gudgeon pin, system is less noisy. The user himself can carry out the maintenance, as the part to wear out is only the compression ring (24), which can be replaced by simply opening the screw (25). The above description with reference to drawings is given only to understand the invention rather than to limit its scope. I CLAIM: 1. An improved air compressor consisting of a cylinder with cylinder head provided with a ball type non return air inlet valve and a piston provided with a plurality of air passages having a cavity at one end and a threaded central hole other end; a floating type non return air inlet valve made up of a non metallic carbon filled Poly Tetra Fluoro Ethylene with central hole accommodated in the said cavity of the piston; a non metallic compression ring, supported by a washer having a plurality of air passages, fitted at one end of the piston at its outer periphery with the help of a screw passing through the said washer and non return air inlet valve engaging into the threaded hole in the piston,; a connecting rod attached with a moulded Nylon ring having housing enclosing therein a bearing at one end and external threads at other end for screwing the said connecting rod into the threaded hole in the piston; the said connecting rod being mounted over an eccentric pivot pin fitted to a flywheel and a power transmission system for rotating the said fly wheel. 2. An improved air compressor as claimed in l wherein a checknut is provided for tightening the said connecting rod screwed in the piston. 3. An improved air compressor as claimed in any of the preceding claims, wherein a compression ring is preferably made of Poly Tetra Fluoro ; Ethylene, which is 6 expandable in nature with diameter same as the inner diameter of the cylinder with spherical outer surface to provide point contact. 4. An improved air compressor as claimed in any of the preceding claims, wherein a connecting rad is attached with a moulded ring made up of nylon or any partially flexible plastic material with housing provided at one end which enclosing a bearing inside it. 5. An improved air compressor as claimed in any of the preceding claims, wherein the non return air inlet valve are placed with in piston itself to provide unidirectional flow of air as well as cooling to piston and compression ring by using air as coolant. 6. An improved air compressor as claimed in any of the preceding claims, wherein the cylinder and cylinder head are provided with the fins. 7 7. An improved air compressor substantially, as herein described and illustrated in Fig 3 to 10 of the accompanying drawings. |
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830-mum-2002-abstract(26-8-2003).pdf
830-mum-2002-abstract(27-2-2004).pdf
830-mum-2002-abstract(granted)-(12-7-2005).pdf
830-mum-2002-cancelled pages(27-2-2004).pdf
830-mum-2002-claims(19-9-2002).pdf
830-mum-2002-claims(26-8-2003).pdf
830-mum-2002-claims(granted)-(12-7-2005).pdf
830-mum-2002-claims(provisional)-(26-8-2003).pdf
830-mum-2002-correspondence(18-7-2005).pdf
830-mum-2002-correspondence(ipo)-(30-7-2004).pdf
830-MUM-2002-CORRESPONDENCE(IPO)-(7-10-2005).pdf
830-mum-2002-description(complete)-(19-9-2002).pdf
830-mum-2002-description(complete)-(26-8-2003).pdf
830-mum-2002-description(granted)-(12-7-2005).pdf
830-mum-2002-description(provisional)-(26-8-2003).pdf
830-mum-2002-drawing(19-9-2002).pdf
830-mum-2002-drawing(26-8-2003).pdf
830-mum-2002-drawing(27-2-2004).pdf
830-mum-2002-drawing(granted)-(12-7-2005).pdf
830-mum-2002-drawing(provisional)-(26-8-2003).pdf
830-mum-2002-form 1(19-9-2002).pdf
830-mum-2002-form 19(25-8-2003).pdf
830-mum-2002-form 2(complete)-(19-9-2002).pdf
830-mum-2002-form 2(complete)-(26-8-2003).pdf
830-mum-2002-form 2(granted)-(12-7-2005).pdf
830-mum-2002-form 2(provisional)-(26-8-2003).pdf
830-mum-2002-form 2(title page)-(complete)-(19-9-2002).pdf
830-mum-2002-form 2(title page)-(complete)-(26-8-2003).pdf
830-mum-2002-form 2(title page)-(granted)-(12-7-2005).pdf
830-mum-2002-form 2(title page)-(provisional)-(26-8-2003).pdf
830-mum-2002-form 26(19-9-2002).pdf
830-mum-2002-form 3(25-11-2002).pdf
830-mum-2002-form 3(26-8-2003).pdf
830-mum-2002-specification(amended)-(27-2-2004).pdf
Patent Number | 195944 | ||||||||
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Indian Patent Application Number | 830/MUM/2002 | ||||||||
PG Journal Number | 29/2010 | ||||||||
Publication Date | 16-Jul-2010 | ||||||||
Grant Date | |||||||||
Date of Filing | 19-Sep-2002 | ||||||||
Name of Patentee | SAVALIA RAVJIBHAI MADHABHAI | ||||||||
Applicant Address | C/0, SAVALIA RESERCH CENTER, OPP:137, LAST BUS STOP, NR:KAMDAR KALYAN KENDRA, NEW BAPUNAGAR AHMEDABAD-380024, GUJARAT,INDIA. | ||||||||
Inventors:
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PCT International Classification Number | F04B023/00 | ||||||||
PCT International Application Number | N/A | ||||||||
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