Patents by Inventor Mark W. Shoemaker
Mark W. Shoemaker 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: 12247617Abstract: A journal bearing for a gear driven pump includes a bearing body having a bearing body circular opening that defines a bearing surface along a length of the bearing body and a face plate adjacent to the bearing surface. The bearing surface is configured to carry a gear shaft load through a hydrodynamic fluid film pressure between a load surface of a gear shaft and the bearing surface. The bearing surface is formed from a leaded bronze material and the face plate is formed from a copper-nickel alloy.Type: GrantFiled: December 8, 2022Date of Patent: March 11, 2025Assignee: HAMILTON SUNDSTRAND CORPORATIONInventors: Mark W. Shoemaker, Ryan Shook
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Publication number: 20250075794Abstract: A pump assembly includes a cylinder block defining a piston bore therein extending in an axial direction. A sleeve lines the piston bore. A piston is included in the piston bore, configured to reciprocate along a stroke in the axial direction within the sleeve. A piston ring is engaged circumferentially about the piston. The piston ring is fixed to the piston and is slidingly engaged to an inner surface of the sleeve.Type: ApplicationFiled: August 28, 2023Publication date: March 6, 2025Applicant: Hamilton Sundstrand CorporationInventors: Jecee Jarman, Zachary Allen Ray Le Duc, Mark W. Shoemaker
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Publication number: 20240350722Abstract: A system includes a variable displacement pump (VDP) in fluid communication with an inlet line and with an outlet line. The VDP includes a variable displacement mechanism configured to vary pressure to the outlet line. An electromechanical actuator (EMA) is operatively connected to actuate the variable displacement mechanism for direct electromechanical control of the VDP.Type: ApplicationFiled: April 21, 2023Publication date: October 24, 2024Applicant: Hamilton Sundstrand CorporationInventors: Ryan Prescott Susca, Mark W. Shoemaker
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Patent number: 12078157Abstract: A variable displacement piston pump, having: a housing, a pivot assembly to pivot between minimal and maximum pivot angles; a pump cover defining an actuator bore with an actuator piston, an actuator arm extending from the actuator piston to the pivot assembly; and an electronic control unit (ECU) coupled to the pump, the ECU having: a pump controller, a linear variable differential transducer (LVDT) coupled to the pump controller and the actuator piston, and an electrohydraulic solenoid valve (EHSV) coupled to the pump controller, the ECU is configured to: determine a pivot differential for the pivot assembly between a target pivot angle and a current pivot angle; determine a position differential for the actuator piston, corresponding to the pivot differential of the pivot assembly; control the EHSV to move the actuator piston by the position differential; and determine, from the LVDT, that the actuator piston moved by the position differential.Type: GrantFiled: December 27, 2021Date of Patent: September 3, 2024Assignee: HAMILTON SUNDSTRAND CORPORATIONInventors: Weishun Willaim Ni, Edward W. Goy, Benjamin T. Harder, Mark W. Shoemaker
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Publication number: 20240191752Abstract: A journal bearing for a gear driven pump includes a bearing body having a bearing body circular opening that defines a bearing surface along a length of the bearing body and a face plate adjacent to the bearing surface. The bearing surface is configured to carry a gear shaft load through a hydrodynamic fluid film pressure between a load surface of a gear shaft and the bearing surface. The bearing surface is formed from a leaded bronze material and the face plate is formed from a copper-nickel alloy.Type: ApplicationFiled: December 8, 2022Publication date: June 13, 2024Inventors: Mark W. Shoemaker, Ryan Shook
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Publication number: 20240183345Abstract: A variable displacement pump system can include a piston sleeve having at least a first inner diameter portion and a second in inner diameter portion and an actuator piston configured to be disposed within the piston sleeve. The actuator piston can have a first piston portion having a first outer diameter, and a second piston portion having a second outer diameter. The first outer diameter can be different than the second outer diameter. The first piston portion can be configured to seal to the first inner diameter portion of the piston sleeve. The second piston portion of the actuator piston can be configured to seal to the second inner diameter portion of the piston sleeve.Type: ApplicationFiled: December 5, 2022Publication date: June 6, 2024Applicant: Hamilton Sundstrand CorporationInventors: Edward W. Goy, Zachary Allen Ray Le Duc, Mark W. Shoemaker, Mason Rosenberg
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Patent number: 11898559Abstract: A gear pump includes gears received within a housing defining an inlet, an outlet and end plates. The gears have shaft portions on each of two sides of each of the two gears. The shaft portions are mounted in journal bearings. The journal bearings each have a gear side face adjacent one of the two gears. A remote face is on a remote side of the journal bearing remote from each of the two gears. There is a plurality of heat pipes in at least one of the journal bearings. The heat pipes move heat from the gear face of the at least one of the journal bearings to the remote face. The plurality of heat pipes is enclosed by the housing, and extend generally in an axial direction from an end adjacent the gear face to an end adjacent the remote face. A fuel supply system is also disclosed.Type: GrantFiled: October 21, 2021Date of Patent: February 13, 2024Assignee: Hamilton Sundstrand CorporationInventors: Mark W. Shoemaker, Zachary Allen Ray Le Duc
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Publication number: 20230417236Abstract: A flow system includes a pump, a motor connected to the pump that drives the pump and draws electrical energy and a sensor that measures the electrical energy drawn by the motor. The system also includes a control module for the flow system. The control module configured to perform a control module method that includes: receiving electrical data from the sensor; receiving operating characteristic data of the pump from one or more pump sensors; comparing the changes in the electrical data over time to the operating characteristic data; and determining a health of the pump on the comparison of changes in the electrical data over time to operating characteristic data.Type: ApplicationFiled: June 27, 2022Publication date: December 28, 2023Inventors: Edward W. Goy, John M. Kassel, Mark W. Shoemaker
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Publication number: 20230204029Abstract: A variable displacement piston pump, having: a housing, a pivot assembly to pivot between minimal and maximum pivot angles; a pump cover defining an actuator bore with an actuator piston, an actuator arm extending from the actuator piston to the pivot assembly; and an electronic control unit (ECU) coupled to the pump, the ECU having: a pump controller, a linear variable differential transducer (LVDT) coupled to the pump controller and the actuator piston, and an electrohydraulic solenoid valve (EHSV) coupled to the pump controller, the ECU is configured to: determine a pivot differential for the pivot assembly between a target pivot angle and a current pivot angle; determine a position differential for the actuator piston, corresponding to the pivot differential of the pivot assembly; control the EHSV to move the actuator piston by the position differential; and determine, from the LVDT, that the actuator piston moved by the position differential.Type: ApplicationFiled: December 27, 2021Publication date: June 29, 2023Inventors: Weishun Willaim Ni, Edward W. Goy, Benjamin T. Harder, Mark W. Shoemaker
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Publication number: 20230127244Abstract: A gear pump includes gears received within a housing defining an inlet, an outlet and end plates. The gears have shaft portions on each of two sides of each of the two gears. The shaft portions are mounted in journal bearings. The journal bearings each have a gear side face adjacent one of the two gears. A remote face is on a remote side of the journal bearing remote from each of the two gears. There is a plurality of heat pipes in at least one of the journal bearings. The heat pipes move heat from the gear face of the at least one of the journal bearings to the remote face. The plurality of heat pipes is enclosed by the housing, and extend generally in an axial direction from an end adjacent the gear face to an end adjacent the remote face. A fuel supply system is also disclosed.Type: ApplicationFiled: October 21, 2021Publication date: April 27, 2023Inventors: Mark W. Shoemaker, Zachary Allen Ray Le Duc
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Patent number: 11624531Abstract: A HVAC system that includes a compressor comprising a suction port and a discharge port. Also included is a refrigerant circulating throughout the HVAC system and through the compressor. Further included is a pressure equalization valve fluidly coupling the discharge port of the compressor with the suction port of the compressor, the pressure equalization valve configured to open while the compressor is operating.Type: GrantFiled: May 15, 2019Date of Patent: April 11, 2023Assignee: CARRIER CORPORATIONInventor: Mark W. Shoemaker
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Patent number: 11215388Abstract: A system includes an indoor HVAC unit and an outdoor HVAC unit in communication with the indoor HVAC unit. The outdoor HVAC unit comprises a compressor, a vapor header in communication with the indoor HVAC unit and compressor, and at least one check valve to allow vapor refrigerant flow into the indoor HVAC unit during a cooling mode and to prevent liquid refrigerant from exiting the vapor header when in a heating mode. A method of operating said system is also disclosed.Type: GrantFiled: December 18, 2019Date of Patent: January 4, 2022Assignee: Carrier CorporationInventors: Derek A. Leman, Matthew T. Austin, Mark W. Shoemaker
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Publication number: 20210123639Abstract: A HVAC system that includes a compressor comprising a suction port and a discharge port. Also included is a refrigerant circulating throughout the HVAC system and through the compressor. Further included is a pressure equalization valve fluidly coupling the discharge port of the compressor with the suction port of the compressor, the pressure equalization valve configured to open while the compressor is operating.Type: ApplicationFiled: May 15, 2019Publication date: April 29, 2021Inventor: Mark W. Shoemaker
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Patent number: 10928080Abstract: A climate control outdoor unit has: a housing; a compressor having an electric motor; a refrigerant-air heat exchanger; an electric fan positioned to drive an air flow along an air flowpath across the refrigerant-air heat exchanger; and an inverter unit coupled to the electric motor to drive the electric motor. An additional air flowpath extends along the inverter unit to merge with the air flowpath.Type: GrantFiled: November 9, 2016Date of Patent: February 23, 2021Assignee: Carrier CorporationInventors: Mark W. Shoemaker, Derek A. Leman
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Patent number: 10823474Abstract: A vapor compression system includes a compressor, a first heat exchanger, an expansion valve and a second heat exchanger arranged serial refrigerant flow path; a first fan configured to direct air over the first heat exchanger; a controller coupled to the first fan and the compressor, the controller configured to: set a compressor discharge superheat limit; determine a compressor discharge superheat; compare the compressor discharge superheat to the compressor discharge superheat limit; and when the compressor discharge superheat is less than the compressor discharge superheat limit, the controller reducing at least one of a compressor speed and a first fan speed.Type: GrantFiled: May 23, 2017Date of Patent: November 3, 2020Assignee: CARRIER CORPORATIONInventors: Matthew Austin, Mark W. Shoemaker
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Publication number: 20200318664Abstract: A clamp (204) for securing an expansion valve (XV) bulb (114) to a vapor header in a refrigeration system is provided. Aspects includes an arcuate member (210) having a first clamping portion (206) and a second clamping portion (208) extending therefrom and a terminal end of the first clamping portion having a first flange (212) and a terminal end of the second clamping portion having a second flange (214). The first clamping portion (206) and the second clamping portion (208) are configured to envelope the expansion valve (XV) bulb (114) and a vapor header in a refrigeration system.Type: ApplicationFiled: September 28, 2018Publication date: October 8, 2020Inventors: Mark W. Shoemaker, James Amick, Parmesh Verma, Yinshan Feng
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Publication number: 20200232694Abstract: A system includes an indoor HVAC unit and an outdoor HVAC unit in communication with the indoor HVAC unit. The outdoor HVAC unit comprises a compressor, a vapor header in communication with the indoor HVAC unit and compressor, and at least one check valve to allow vapor refrigerant flow into the indoor HVAC unit during a cooling mode and to prevent liquid refrigerant from exiting the vapor header when in a heating mode. A method of operating said system is also disclosed.Type: ApplicationFiled: December 18, 2019Publication date: July 23, 2020Inventors: Derek A. Leman, Matthew T. Austin, Mark W. Shoemaker
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Publication number: 20170343260Abstract: A vapor compression system includes a compressor, a first heat exchanger, an expansion valve and a second heat exchanger arranged serial refrigerant flow path; a first fan configured to direct air over the first heat exchanger; a controller coupled to the first fan and the compressor, the controller configured to: set a compressor discharge superheat limit; determine a compressor discharge superheat; compare the compressor discharge superheat to the compressor discharge superheat limit; and when the compressor discharge superheat is less than the compressor discharge superheat limit, the controller reducing at least one of a compressor speed and a first fan speed.Type: ApplicationFiled: May 23, 2017Publication date: November 30, 2017Inventors: Matthew Austin, Mark W. Shoemaker
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Publication number: 20170130975Abstract: A climate control outdoor unit comprises: a housing; a compressor having an electric motor; a refrigerant-air heat exchanger; an electric fan positioned to drive an air flow along an air flowpath across the refrigerant-air heat exchanger; and an inverter unit coupled to the electric motor to drive the electric motor. An additional air flowpath extends along the inverter unit to merge with the air flowpath.Type: ApplicationFiled: November 9, 2016Publication date: May 11, 2017Applicant: Carrier CorporationInventors: Mark W. Shoemaker, Derek A. Leman