Patents by Inventor Tom Cheuk-In Wong
Tom Cheuk-In Wong 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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Publication number: 20120125723Abstract: A disk brake assembly having a rotor and a caliper is provided. The caliper has first and second body portions and an intermediate portion coupled between the body portions. The first body portion has a first brake pad coupled thereto. The second body portion has a bore extending therein that defines an inner surface. The assembly further includes a piston disposed within the bore. The piston has an end portion and a tubular body coupled to the end portion. The end portion has a second brake pad coupled thereto. The assembly further includes a positioning sleeve member disposed on a portion of the inner surface within a portion of the groove. The assembly further includes a spring disposed in the groove that moves the piston and the second brake pad away from the rotor in response to a decreased fluid pressure in the piston.Type: ApplicationFiled: November 23, 2010Publication date: May 24, 2012Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Albert C. Wong, Tom Cheuk-In Wong
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Patent number: 7086845Abstract: A vane pump includes a cylindrical rotor rotatable inside of an oval-shaped rotor chamber of cam ring disposed between a pressed plate and a pressure plate. The rotor has opposite sides and a peripheral outer surface in which radial vane slots are formed and guide slideable vanes. The rotor is coated on its surfaces with a film of abradable coating material which reduces the operating clearance between the rotor and the thrust and pressure plates and cam ring so as to increase the volumetric efficiency of the pump.Type: GrantFiled: January 23, 2003Date of Patent: August 8, 2006Assignee: Delphi Technologies, Inc.Inventors: Albert Cheuk-Yin Wong, Tom Cheuk-In Wong
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Publication number: 20040146421Abstract: A vane pump includes a cylindrical rotor rotatable inside of an oval-shaped rotor chamber of cam ring disposed between a pressed plate and a pressure plate. The rotor has opposite sides and a peripheral outer surface in which radial vane slots are formed and guide slideable vanes. The rotor is coated on its surfaces with a film of abradable coating material which reduces the operating clearance between the rotor and the thrust and pressure plates and cam ring so as to increase the volumetric efficiency of the pump.Type: ApplicationFiled: January 23, 2003Publication date: July 29, 2004Inventors: Albert Cheuk-Yin Wong, Tom Cheuk-In Wong
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Patent number: 6481990Abstract: A multi-vane hydraulic motor for accessory drive in which the vanes of a hydraulically balanced rotor are primarily urged into operative engagement with a surrounding cam by forces of the hydraulic fluid in undervane passage produced by an associated hydraulic pump to eliminate requirement for biasing springs and spring attachment of prior art motor. A high pressure chamber provided between the motor housing and a pressure plate mounted therein is hydraulically connected to the vane chambers of the rotor of the motor for the hydraulic drive thereof. An end cap closing the motor housing has the hydraulic input and output lines operatively connected thereto.Type: GrantFiled: March 21, 2001Date of Patent: November 19, 2002Assignee: Delphi Technologies, Inc.Inventors: Tom Cheuk-In Wong, Johnny M. Paris, Albert Cheuk-Yin Wong
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Patent number: 6481992Abstract: A vane pump includes a cylindrical rotor rotatable inside of an oval-shaped rotor chamber defined by a cam ring around the rotor. A thrust plate and a pressure plate on opposite sides of the cam ring cover the rotor chamber and are squeezed together by a pressure force attributable to fluid in a discharge chamber of the vane pump at a discharge pressure thereof. A first thrust face of the thrust plate is pressed against an end wall of a cavity of a pump housing in which the components are installed. Fluid at the discharge pressure is ported to one or more balance chambers between the thrust plate and the end wall of the housing. The balance chambers are defined by a gasket received in a groove of the first thrust face.Type: GrantFiled: February 8, 2001Date of Patent: November 19, 2002Assignee: Delphi Technologies, Inc.Inventors: Albert Cheuk-Yin Wong, Tom Cheuk-In Wong, Johnny M. Paris, Gary Ray Minnis
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Publication number: 20020136655Abstract: A multi-vane hydraulic motor for accessory drive in which the vanes of a hydraulically balanced rotor are primarily urged into operative engagement with a surrounding cam by forces of the hydraulic fluid in undervane passage produced by an associated hydraulic pump to eliminate requirement for biasing springs and spring attachment of prior art motor. A high pressure chamber provided between the motor housing and a pressure plate mounted therein is hydraulically connected to the vane chambers of the rotor of the motor for the hydraulic drive thereof. An end cap closing the motor housing has the hydraulic input and output lines operatively connected thereto.Type: ApplicationFiled: March 21, 2001Publication date: September 26, 2002Inventors: Tom Cheuk-In Wong, Johnny M. Paris, Albert Cheuk-Yin Wong
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Patent number: 6422845Abstract: The pump has a multi-vane rotor operating within a cam ring to pump oil to a component such as a power steering gear. The pump rotor sandwiched between stationary thrust and pressure plates is supplied with oil from a surrounding fluid chamber through aligned intake ports in the two plates. Fluid chambers formed between the reciprocating vanes of the rotor discharges oil into axially aligned discharge ports of the thrust and pressure plates. The discharge port of the thrust plate is hydraulically connected to the discharge port of the pressure plate . Pressure oil in the discharge port of the pressure plate feeds into a system pressure chamber outboard of the pressure plate. Oil in the system pressure chamber is fed back to a first side chamber of the rotor through at least one simple flow passage in the pressure plate. The first side chamber is formed between inner and outer lands on the rotor.Type: GrantFiled: December 1, 2000Date of Patent: July 23, 2002Assignee: Delphi Technologies, Inc.Inventors: Albert Cheuk-Yin Wong, Tom Cheuk-In Wong, Johnny M. Paris
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Publication number: 20020068001Abstract: The pump has a multi-vane rotor operating within a cam ring to pump oil to a component such as a power steering gear. The pump rotor sandwiched between stationary thrust and pressure plates is supplied with oil from a surrounding fluid chamber through aligned intake ports in the two plates. Fluid chambers formed between the reciprocating vanes of the rotor discharges oil into axially aligned discharge ports of the thrust and pressure plates. The discharge port of the thrust plate is hydraulically connected to the discharge port of the pressure plate . Pressure oil in the discharge port of the pressure plate feeds into a system pressure chamber outboard of the pressure plate. Oil in the system pressure chamber is fed back to a first side chamber of the rotor through at least one simple flow passage in the pressure plate. The first side chamber is formed between inner and outer lands on the rotor.Type: ApplicationFiled: December 1, 2000Publication date: June 6, 2002Inventors: Albert Cheuk-Yin Wong, Tom Cheuk-In Wong, Johnny M. Paris
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Patent number: 6390783Abstract: The fluid reservoir of a hydraulic system is fitted with a nozzle having a constricted primary discharge opening for directing an accelerated jet stream of hydraulic fluid returned to the reservoir from a pump back to an inlet of the pump. The jet stream aspirates additional fluid from the reservoir to boost the supply to the pump to minimize cavitation for quiet operation. The nozzle includes at least one bleed hole located upstream of the primary discharge opening through which a fraction of the fluid stream escapes into the reservoir and is permitted to dwell for a time sufficient to allow natural separation of entrained gas from the fractional stream before being drawn into the reservoir outlet by the jet stream.Type: GrantFiled: July 25, 2000Date of Patent: May 21, 2002Assignee: Delphi Technologies, Inc.Inventors: Albert Cheuk-Yin Wong, Tom Cheuk-In Wong, Johnny M. Paris
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Publication number: 20010033803Abstract: A vane pump includes a cylindrical rotor rotatable inside of an oval-shaped rotor chamber defined by a cam ring around the rotor. A thrust plate and a pressure plate on opposite sides of the cam ring cover the rotor chamber and are squeezed together by a pressure force attributable to fluid in a discharge chamber of the vane pump at a discharge pressure thereof. A first thrust face of the thrust plate is pressed against an end wall of a cavity of a pump housing in which the components are installed. Fluid at the discharge pressure is ported to one or more balance chambers between the thrust plate and the end wall of the housing. The balance chambers are defined by a gasket received in a groove of the first thrust face.Type: ApplicationFiled: February 8, 2001Publication date: October 25, 2001Inventors: Albert Cheuk-Yin Wong, Tom Cheuk-In Wong, Johnny M. Paris, Gary Ray Minnis
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Patent number: 6050796Abstract: A vane pump including a cylindrical rotor rotatable inside of an oval-shaped rotor chamber defined by a cam ring around the rotor. A thrust plate and a pressure plate on opposite sides of the cam ring cover the rotor chamber and are squeezed together by a pressure force attributable to fluid in a discharge chamber of the vane pump at a discharge pressure thereof. Fluid at the discharge pressure of the pump is ported to an annular first longitudinal balance chamber between the pressure plate and an end of the rotor facing the pressure plate and to an annular second longitudinal balance chamber between the thrust plate and an opposite end of the rotor facing the thrust plate. A pressure force on the pressure plate attributable to fluid in the first balance chamber balances a fraction of the pressure force on the pressure plate attributable to fluid in the discharge chamber to reduce flexure of the pressure plate into the rotor chamber.Type: GrantFiled: May 18, 1998Date of Patent: April 18, 2000Assignee: General Motors CorporationInventors: Albert Cheuk-Yin Wong, Tom Cheuk-In Wong
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Patent number: 5802848Abstract: A motor vehicle hydraulic system including a power steering pump, a reservoir, a steering assist fluid motor, and a second fluid motor for a radiator cooling fan. A flow control valve remote from the power steering pump divides the total fluid flow from the power steering pump into a high flow branch and a low flow branch. Fluid circulates in the low flow branch at a substantially constant flow rate for a proportional control valve for the steering assist fluid motor and returns to the reservoir through an unrestricted tubular boss on the reservoir. Fluid in the high flow branch issues as a jet stream from a nozzle on the reservoir into a venturi passage submerged in fluid in the reservoir. The venturi passage is connected to an inlet port of the power steering pump. The jet stream aspirates fluid from the reservoir into the venturi passage. The kinetic energy of the jet stream is converted into superatmospheric pressure at the inlet port of the power steering pump to suppress cavitation.Type: GrantFiled: August 28, 1997Date of Patent: September 8, 1998Assignee: General Motors CorporationInventors: Kevin Mark McClendon, James Leroy Davison, Robert Edward Beyerlein, Tom Cheuk-In Wong, Allan Lee Dickinson, Albert Cheuk-Yin Wong, Carl David Tarum, James Michael Shea, David Fredrick Hammerbacher