Patents by Inventor Vipen Khetarpal
Vipen Khetarpal 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: 7021193Abstract: A hinge mechanism for a variable displacement swash plate type compressor including an arm extending from a rotor and a pair of arms extending from a swash plate hub, wherein a pair of shoes are interposed between the arm of the rotor and each of the arms of the swash plate hub to facilitate a tilting of a swash plate disposed on the swash plate hub, the hinge mechanism militating against undesirable contact between the arms of the swash plate hub and the arm of the rotor.Type: GrantFiled: January 20, 2005Date of Patent: April 4, 2006Assignee: Visteon Global Technologies, Inc.Inventors: Srinivas S. Pitla, Vipen Khetarpal
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Patent number: 7014428Abstract: A control system for a variable displacement compressor uses a mechanical valve to minimize energy consumption in an air conditioning system. The control system can also provide instantaneous indications to the vehicle controller of air conditioning power consumption to avoid engine loading. Controls are also used to contain oil within the compressor and to minimize its presence downstream of the compressor into the gas cooler and evaporator parts of the system.Type: GrantFiled: December 23, 2002Date of Patent: March 21, 2006Assignee: Visteon Global Technologies, Inc.Inventors: Srinivas S. Pitla, Yong Huang, Vipen Khetarpal
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Publication number: 20050226740Abstract: A rear housing for a compressor reduces the operating temperature of the compressor. The compressor generally includes a cylinder block receiving low pressure fluid from the rear housing and providing high pressure fluid back to the rear housing. The rear housing defines a suction chamber and a discharge chamber. The rear housing further defines an isolation chamber positioned between the suction and discharge chambers. In this way, heat transfer between the higher temperature discharge fluid and the lower temperature suction fluid is reduced, thereby reducing the operating temperature of the compressor.Type: ApplicationFiled: April 9, 2004Publication date: October 13, 2005Inventors: Kanwal Bhatia, Eric Gheen, Vipen Khetarpal, Aurelian Bahmata
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Patent number: 6908290Abstract: A compressor for an automotive air conditioning system includes a cylinder head that comprises a mixing chamber, suction chamber and discharge chamber. The cylinder head comprises a first annular wall defining a mixing chamber and a second annular wall disposed about the first annular wall and spaced apart therefrom to define the suction chamber that communicates with the suction ports to the cylinder chambers. The discharge chamber is disposed about the second annular wall and communicates with the discharge ports. Refrigerant flows through the mixing chamber in a swirling or other turbulent pattern and into suction chamber through circumferentially spaced openings. By providing the mixing chamber and isolating the mixing chamber from the suction chamber, pressure pulsation resulting from opening of the suction ports to admit refrigerant is reduced.Type: GrantFiled: May 1, 2003Date of Patent: June 21, 2005Assignee: Visteon Global Technologies, Inc.Inventors: Srinivas S. Pitla, Vipen Khetarpal
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Publication number: 20050126388Abstract: A hinge mechanism for a variable displacement swash plate type compressor including an arm extending from a rotor and a pair of arms extending from a swash plate hub, wherein a pair of shoes are interposed between the arm of the rotor and each of the arms of the swash plate hub to facilitate a tilting of a swash plate disposed on the swash plate hub, the hinge mechanism militating against undesirable contact between the arms of the swash plate hub and the arm of the rotor.Type: ApplicationFiled: January 20, 2005Publication date: June 16, 2005Inventors: Srinivas Pitla, Vipen Khetarpal
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Patent number: 6860188Abstract: A hinge mechanism for a variable displacement swash plate type compressor including an arm extending from a rotor and a pair of arms extending from a swash plate hub, wherein a pair of shoes are interposed between the arm of the rotor and each of the arms of the swash plate hub to facilitate a tilting of a swash plate disposed on the swash plate hub, the hinge mechanism militating against undesirable contact between the arms of the swash plate hub and the arm of the rotor.Type: GrantFiled: June 20, 2003Date of Patent: March 1, 2005Assignee: Visteon Global Technologies, Inc.Inventors: Srinivas S. Pitla, Vipen Khetarpal
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Patent number: 6840054Abstract: An air conditioning system for cooling a vehicle passenger compartment is disclosed. The system includes an air duct, a refrigerant circuit, a variable displacement compressor, and a controller. The air duct directs air conditioned air into the vehicle passenger compartment. The refrigerant circuit circulates a refrigerant, wherein a first portion of the circuit is exposed to the air duct and a second portion of the circuit is exposed to air external of the vehicle passenger compartment. The variable displacement compressor is in fluid communication with the refrigerant circuit, wherein the compressor has a control valve for regulating refrigerant flow between a compressor crankcase and a compressor discharge chamber and between the compressor crankcase and a compressor suction chamber. The controller in electrical communication with the variable displacement compressor for controlling refrigerant flow and a displacement of the compressor by actuating the control valves.Type: GrantFiled: December 21, 2001Date of Patent: January 11, 2005Assignee: Visteon Global Technologies, Inc.Inventors: Srinivas S. Pitla, Vipen Khetarpal, Yong Huang
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Publication number: 20040255775Abstract: A hinge mechanism for a variable displacement swash plate type compressor including an arm extending from a rotor and a pair of arms extending from a swash plate hub, wherein a pair of shoes are interposed between the arm of the rotor and each of the arms of the swash plate hub to facilitate a tilting of a swash plate disposed on the swash plate hub, the hinge mechanism militating against undesirable contact between the arms of the swash plate hub and the arm of the rotor.Type: ApplicationFiled: June 20, 2003Publication date: December 23, 2004Inventors: Srinivas S. Pitla, Vipen Khetarpal
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Publication number: 20040219043Abstract: A compressor for an automotive air conditioning system includes a cylinder head that comprises a mixing chamber, suction chamber and discharge chamber. The cylinder head comprises a first annular wall defining a mixing chamber and a second annular wall disposed about the first annular wall and spaced apart therefrom to define the suction chamber that communicates with the suction ports to the cylinder chambers. The discharge chamber is disposed about the second annular wall and communicates with the discharge ports. Refrigerant flows through the mixing chamber in a swirling or other turbulent pattern and into suction chamber through circumferentially spaced openings. By providing the mixing chamber and isolating the mixing chamber from the suction chamber, pressure pulsation resulting from opening of the suction ports to admit refrigerant is reduced.Type: ApplicationFiled: May 1, 2003Publication date: November 4, 2004Applicant: Visteon Global Technologies, Inc.Inventors: Srinivas S. Pitla, Vipen Khetarpal
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Publication number: 20040120829Abstract: A control system for a variable displacement compressor uses a mechanical valve to minimize energy consumption in an air conditioning system. The control system can also provide instantaneous indications to the vehicle controller of air conditioning power consumption to avoid engine loading. Controls are also used to contain oil within the compressor and to minimize its presence downstream of the compressor into the gas cooler and evaporator parts of the system.Type: ApplicationFiled: December 23, 2002Publication date: June 24, 2004Inventors: Srinivas S. Pitla, Yong Huang, Vipen Khetarpal
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Patent number: 6668702Abstract: A cylinder liner system comprising a cylinder liner having an elongated tube, an inside surface, an outside surface, and a notch on a top side; a block having a bore for concentrically accepting the cylinder liner and a locking pin that engages the cylinder liner and the block.Type: GrantFiled: October 12, 2001Date of Patent: December 30, 2003Assignee: Visteon Global Technologies, Inc.Inventors: Lavlesh Sud, Vipen Khetarpal
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Patent number: 6658986Abstract: A housing assembly for a refrigerant compressor in an air conditioning system includes a forward housing portion, and a rearward housing portion. The two mate together to contain the internal components and seal the compressor. A clamp engages the forward and the rearward housing portions and is rotated to compress the two together. It maintains a desired clamping force under various operating and environmental conditions.Type: GrantFiled: April 11, 2002Date of Patent: December 9, 2003Assignee: Visteon Global Technologies, Inc.Inventors: Srinivas S. Pitla, Chang Yun Ching, Vipen Khetarpal, Mirza Qadir M. Baig
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Publication number: 20030194331Abstract: A housing assembly for a refrigerant compressor in an air conditioning system includes a forward housing portion, and a rearward housing portion. The two mate together to contain the internal components and seal the compressor. A clamp engages the forward and the rearward housing portions and is rotated to compress the two together. It maintains a desired clamping force under various operating and environmental conditions.Type: ApplicationFiled: April 11, 2002Publication date: October 16, 2003Inventors: Srinivas S. Pitla, Chang Yun Ching, Vipen Khetarpal, Mirza Qadir M. Baig
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Patent number: 6591735Abstract: A swashplate type compressor that includes one or more pistons having an extra support surface for receiving a side load is provided. In a first preferred embodiment of the piston, a rotational restrictor that overlaps the head region is utilized as the extra support surface. In a second preferred embodiment, a support projection, separate from the head region, is utilized as the extra support surface. The extra support surface of the piston of the present invention receives a portion of the side load exerted on the piston, thereby relieving some of stress applied to the head region.Type: GrantFiled: February 13, 2001Date of Patent: July 15, 2003Assignee: Visteon Global Technologies, Inc.Inventors: Lavlesh Sud, Mirza Qadir M. Baig, Srinivas S. Pitla, Vipen Khetarpal, Yong Huang
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Publication number: 20030121413Abstract: The present involves an anti-rotation piston for a swash plate compressor assembly having a piston-receiving bore and an anti-rotation groove formed adjacently therein. The anti-rotation piston comprises a body and a skirt extending from the body. The body has a first radius of curvature and first and second ends. The body complements the bore so that the body is slideably moveable within the bore. The skirt extends from the second end of the body and has an arcuate outer surface which complements the groove so that the skirt is slideably moveable along the groove. The skirt has a second radius of curvature which is greater than the first radius of curvature. The second radius of curvature is offset from the first radius of curvature so that the body and the skirt have differing axes of rotation which prevents the piston from rotating.Type: ApplicationFiled: December 28, 2001Publication date: July 3, 2003Inventors: Srinivas S. Pitla, Vipen Khetarpal
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Publication number: 20030115897Abstract: An air conditioning system for cooling a vehicle passenger compartment is disclosed. The system includes an air duct, a refrigerant circuit, a variable displacement compressor, and a controller. The air duct directs air conditioned air into the vehicle passenger compartment. The refrigerant circuit circulates a refrigerant, wherein a first portion of the circuit is exposed to the air duct and a second portion of the circuit is exposed to air external of the vehicle passenger compartment. The variable displacement compressor is in fluid communication with the refrigerant circuit, wherein the compressor has a control valve for regulating refrigerant flow between a compressor crankcase and a compressor discharge chamber and between the compressor crankcase and a compressor suction chamber. The controller in electrical communication with the variable displacement compressor for controlling refrigerant flow and a displacement of the compressor by actuating the control valves.Type: ApplicationFiled: December 21, 2001Publication date: June 26, 2003Inventors: Srinivas S. Pitla, Vipen Khetarpal, Yong Huang
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Publication number: 20030070543Abstract: A cylinder liner system comprising a cylinder liner having an elongated tube, an inside surface an outside surface, and an notch on the top side; a block having a bore for concentrically accepting the cylinder liner and a locking pin that engages the cylinder liner and the block.Type: ApplicationFiled: October 12, 2001Publication date: April 17, 2003Applicant: VISTEON GLOBAL TECHNOLOGIES, INC.Inventors: Lavlesh Sud, Vipen Khetarpal
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Patent number: 6497114Abstract: An oil separator comprising a cylindrical portion, an inlet for incoming gas/oil mixture, an outlet for separated gas, a lower portion, and an outlet for separated oil is provided. The lower portion decreases in diameter as it proceeds from top to bottom, thereby providing for an increase in centrifugal force within the oil separator and greater separation of oil. The inlet traverses an upper wall of the oil separator, and preferably comprises a plurality of passageways angled with respect to the upper wall.Type: GrantFiled: September 18, 2001Date of Patent: December 24, 2002Assignee: Visteon Global Technologies, Inc.Inventors: Guntis Viktors Strikis, Kanwal Bhatia, Srinivas Pitla, Vipen Khetarpal
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Patent number: 6494930Abstract: The present invention relates to an oil separator for separating oil from a gaseous medium discharged by a compressor. The oil separator includes an inlet for communication with the discharge outlet of a compressor, and first and second outlets. The first outlet allows separated refrigerant to escape the oil separator, and the second outlet allows separated oil to escape the oil separator. A tortuous path lies between the inlet and a first outlet, and is comprised of one or more enlarged regions and one or more narrow regions that are angularly situated with each other. The walls of the tortuous path provide surfaces on which the oil contained within the gaseous medium can be impinged, and thereby separated from the gaseous medium. The oil separator may also include a collection chamber and drainage pathways that communicate with the tortuous path. The oil separator can be a separate body that is attached to a compressor, or may be integrally formed by a housing of a compressor.Type: GrantFiled: March 26, 2001Date of Patent: December 17, 2002Assignee: Visteon Global Technologies, Inc.Inventors: Guntis Viktors Strikis, Kanwal Bhatia, Lavlesh Sud, Mirza Mahmood Baig, Vipen Khetarpal
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Patent number: 6481240Abstract: An oil separator comprising a cylindrical portion, an inlet for incoming gas/oil mixture, an outlet for separated gas, a lower portion, and an outlet for separated oil is provided. The lower portion decreases in diameter as it proceeds from top to bottom, thereby providing for an increase in centrifugal force within the oil separator and greater separation of oil.Type: GrantFiled: February 1, 2001Date of Patent: November 19, 2002Assignee: Visteon Global Technologies, Inc.Inventors: Guntis Viktors Strikis, Kanwal Bhatia, Lavlesh Sud, Mirza Qadir Mahmood Baig, Vipen Khetarpal