Patents by Inventor Nagesh Mavinahally
Nagesh Mavinahally has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9181883Abstract: Various embodiments include engine carburetors. Various embodiments provide for methods of cylinder manufacturing engines. Various embodiments provide for methods of cylinder manufacturing four-stroke engines. Various embodiments provide for methods of cylinder manufacturing two-stroke engines.Type: GrantFiled: January 18, 2013Date of Patent: November 10, 2015Inventors: Nagesh S. Mavinahally, Jay Veerathappa, Pushpa Nagesh Mavinahally
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Publication number: 20140202428Abstract: Various embodiments include engine carburetors. Various embodiments provide for methods of cylinder manufacturing engines. Various embodiments provide for methods of cylinder manufacturing four-stroke engines. Various embodiments provide for methods of cylinder manufacturing two-stroke engines.Type: ApplicationFiled: January 18, 2013Publication date: July 24, 2014Inventors: Nagesh S. Mavinahally, Jay Veerathappa, Pushpa Nagesh Mavinahally
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Patent number: 8596240Abstract: An integrally cast four-stroke engine mono-block (10) includes integrally cast cylinder block (20), cylinder head (40), and portion of a crankcase (30) including crankcase 10 outboard and inboard walls (89, 90). At least parts of outer and inner bearing bosses (21a, 21b) are integrally cast with the cylinder block (20) with the inner bearing boss (21b) integrally cast in the inboard wall (90). At least one cored out longitudinally extending open valve 15 train chamber (88) is disposed between the outboard wall (89) and the cast cylinder block (20).Type: GrantFiled: September 25, 2010Date of Patent: December 3, 2013Inventors: Nagesh Mavinahally, Jay Veerathappa, Pushpa Nagesh Mavinahally
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Patent number: 8534268Abstract: A two-stroke internal combustion engine includes at least one gaseous communication charge passage between a crankcase chamber and a combustion chamber of the engine and a piston to open and close the top end of the transfer passage. The air inlet port to the transfer passage for stratified scavenging is opened and closed by the piston that has passages and cutouts. The charge inlet to the crankcase chamber is opened and closed by the piston. The air and charge inlet passages are substantially asymmetrical to the layout of the transfer passages and are closer to one transfer passage compared to the other. The internal air passage in the piston is substantially perpendicular to the piston pin.Type: GrantFiled: September 10, 2010Date of Patent: September 17, 2013Inventors: Nagesh Mavinahally, Jay S. Veerathappa
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Publication number: 20120006308Abstract: A transfer passage design for a two stroke internal combustion engine that allows for regulation of the air/fuel flow as the piston nears the bottom of its stroke. Additionally, a cut out in the skirt of the piston may allow for additional gaseous communication between the crankcase chamber and the transfer passage.Type: ApplicationFiled: July 6, 2011Publication date: January 12, 2012Inventors: Nagesh Mavinahally, Bernardo Herzer, David Kostka
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Publication number: 20110259294Abstract: A lubricating system for a two-stroke engine is provided in which oil is more reliably pumped into the two-stroke engine. The oil travels through passages that are integrally cast into the cylinder and/or crankcase. The oil may be injected directly into the crankcase chamber or intake passage. The oil pump may be a rotary pump mounted on the crankcase concentric to the crankshaft. It is also possible to not use an oil pump, and have the oil drawn into the engine by vacuum created in the crankcase.Type: ApplicationFiled: April 21, 2011Publication date: October 27, 2011Inventors: Bernardo Herzer, David Kostka, Nagesh Mavinahally
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Publication number: 20110073064Abstract: An integrally cast four-stroke engine mono-block (10) includes integrally cast cylinder block (20), cylinder head (40), and portion of a crankcase (30) including crankcase 10 outboard and inboard walls (89, 90). At least parts of outer and inner bearing bosses (21a, 21b) are integrally cast with the cylinder block (20) with the inner bearing boss (21b) integrally cast in the inboard wall (90). At least one cored out longitudinally extending open valve 15 train chamber (88) is disposed between the outboard wall (89) and the cast cylinder block (20).Type: ApplicationFiled: September 25, 2010Publication date: March 31, 2011Inventors: Nagesh Mavinahally, Jay Veerathappa, Pushpa Nagesh Mavinahally
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Publication number: 20110061637Abstract: In various embodiments, a metering apparatus may be associated with an engine. The metering apparatus may include a first passageway for transporting air to a first port of an engine, and a second passageway for transporting gaseous fuel to a second port of the engine.Type: ApplicationFiled: September 10, 2010Publication date: March 17, 2011Inventors: Nagesh Mavinahally, Jay Veerathappa
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Publication number: 20110061636Abstract: A two-stroke internal combustion engine includes at least one gaseous communication charge passage between a crankcase chamber and a combustion chamber of the engine and a piston to open and close the top end of the transfer passage. The air inlet port to the transfer passage for stratified scavenging is opened and closed by the piston that has passages and cutouts. The charge inlet to the crankcase chamber is opened and closed by the piston. The air and charge inlet passages are substantially asymmetrical to the layout of the transfer passages and are closer to one transfer passage compared to the other. The internal air passage in the piston is substantially perpendicular to the piston pin.Type: ApplicationFiled: September 10, 2010Publication date: March 17, 2011Inventors: Nagesh Mavinahally, Jay Veerathappa
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Publication number: 20110056462Abstract: Various embodiments provide for methods of cylinder manufacturing engines. Various embodiments provide for methods of cylinder manufacturing four-stroke engines. Various embodiments provide for methods of cylinder manufacturing two-stroke engines.Type: ApplicationFiled: September 4, 2010Publication date: March 10, 2011Inventors: Nagesh Mavinahally, Jay Veerathappa, Pushpa Nagesh Mavinahally
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Publication number: 20080047507Abstract: A two-stroke internal combustion engine is provided with a fuel injector. The two-stroke internal combustion engine may have at least one transfer passage, an air channel, and a fuel injector. The transfer passage is between a crankcase and a combustion chamber of the engine. The air channel is in gaseous communication with a top portion of the transfer channel. The fuel injector is in gaseous communication with the air channel and injects fuel into the air channel. The two-stroke engine may be used on hand-held, lawn and garden equipment.Type: ApplicationFiled: October 24, 2007Publication date: February 28, 2008Inventor: Nagesh Mavinahally
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Publication number: 20070063358Abstract: A carburetor including a frame having a first air/fuel channel and a second air channel; and a throttle valve assembly connected to the frame and having two valve sections. Each valve section is located in a respective one of the channels. A second one of the valve sections has an air bleed hole therethrough. The second valve section is movable relative to the frame from a first idle position to a second intermediate closed position and then to a third open position at a wide open throttle (WOT). The air bleed hole allows flow through the second channel at the first idle position, but does not allow flow through the second channel when the second valve section is at the second intermediate closed position.Type: ApplicationFiled: September 8, 2006Publication date: March 22, 2007Applicant: Homelite Technologies Ltd.Inventor: Nagesh Mavinahally
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Publication number: 20060278183Abstract: A two-stroke internal combustion engine includes dual transfer passages in gaseous communication between a crankcase chamber and a combustion chamber of the engine, an air passage through the crankcase to the crankcase chamber and in gaseous communication with a carburetor of the engine. A rotatable circular disk or crank-web is rotatably connected to a crankshaft. A piston may be used to open and close a top end of the passages. An air inlet port to the transfer passage for stratified scavenging is opened and closed by the crank-web that has passages and cutouts. The rotary valve replaces the one-way reed valve used in stratified scavenged and charged two-stroke engines. The air passes from lower ends of the transfer passages to top ends and into the crankcase through a piston passage, through the adjacent transfer passages directly, or through a passage in the piston into the crankcase.Type: ApplicationFiled: August 18, 2006Publication date: December 14, 2006Inventors: Nagesh Mavinahally, Jay Veerathappa
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Publication number: 20060243230Abstract: A two-stroke internal combustion engine is provided with a transfer passage in gaseous communication with the combustion chamber. The intake system supplies air to the transfer passage and/or the crankcase. A fuel injector may be used to supply fuel to the air supplied to the crankcase or the transfer passage.Type: ApplicationFiled: March 20, 2006Publication date: November 2, 2006Inventors: Nagesh Mavinahally, David Brower
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Publication number: 20060225951Abstract: A muffler with a housing for receiving exhaust gasses from an engine is disclosed. The muffler includes a housing with an inlet and an exit, a baffle plate partitioning the housing into first and second chambers. The baffle plate includes a catalyst receptacle in the first chamber, the second chamber includes the exit of the housing. A catalytic converter element with a longitudinal axis is housed within the catalyst receptacle, the catalytic converter element is positioned within the catalyst receptacle such that exhaust gas passes through the catalytic converter element in a direction transverse to the longitudinal axis of the catalytic converter element and through the second chamber to exit the housing.Type: ApplicationFiled: April 8, 2005Publication date: October 12, 2006Inventors: Nagesh Mavinahally, Fabio Romero, David Brower
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Publication number: 20060185632Abstract: A two-stroke internal combustion engine is provided with a fuel injector. The two-stroke internal combustion engine may have at least one transfer passage, an air channel, and a fuel injector. The transfer passage is between a crankcase and a combustion chamber of the engine. The air channel is in gaseous communication with a top portion of the transfer channel. The fuel injector is in gaseous communication with the air channel and injects fuel into the air channel. The two-stroke engine may be used on hand-held, lawn and garden equipment.Type: ApplicationFiled: February 9, 2006Publication date: August 24, 2006Inventor: Nagesh Mavinahally
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Publication number: 20060005794Abstract: A two cycle internal combustion engine cylinder having a piston chamber. The cylinder includes transfer ports; and an exhaust port divided into at least two sections. A first one of the sections has an aperture at the piston chamber with a top surface located closer to a top of the piston chamber than a top surface of an aperture of a second one of the sections at the piston chamber. The first section has a cross-sectional area which is smaller than a cross-sectional area of the second section. The aperture into the first section is located further away from the transfer ports than the aperture into the second section.Type: ApplicationFiled: July 7, 2004Publication date: January 12, 2006Inventor: Nagesh Mavinahally
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Publication number: 20050139179Abstract: A two-stroke internal combustion engine includes at least one gaseous communication charge passage between a crankcase chamber and a combustion chamber of the engine and a piston to open and close the top end of the passage and a rotary valve to open and close the lower end of the transfer passage. The air inlet port to the transfer passage for stratified scavenging is opened and closed by the crank-web that has passages and cutouts. The rotary valve replaces the one-way reed valve used in stratified scavenged and charged two-stroke engines. The air passes from the lower end of transfer passage to the top end and into the crankcase through the piston passage, alternatively air may also pass through the adjacent transfer passage directly or through a passage in the piston into the crankcase. A two-stroke engine also consists of a charge injection system controlled by the crank web eliminating the one-way valve.Type: ApplicationFiled: December 30, 2004Publication date: June 30, 2005Inventors: Nagesh Mavinahally, Jay Veerathappa