Patents by Inventor James Howland
James Howland 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: 11225776Abstract: A hydraulic system for recovering potential energy of a load implement of a mobile construction vehicle. The hydraulic system includes first and second actuators and control valving. The first and second actuators are configured to be coupled to the load implement for controlling raising and lowering of the load element. The control valving is operable between a first position at which, during a lowering of the load implement, the control valving directs hydraulic fluid from one of the first and second actuators to an accumulator to charge the accumulator, and a second position at which the control valving directs hydraulic fluid from the accumulator to one or more of the first and second actuators to power the one or more of the first and second actuators to raise the load element.Type: GrantFiled: January 28, 2021Date of Patent: January 18, 2022Assignee: Parker-Hannifin CorporationInventors: Nicholas N. White, James Howland, Hao Zhang, Blake Carl
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Publication number: 20210309287Abstract: A hydraulic system (40) for a work machine comprising a priority circuit (41) including at least a first priority actuator (47, 48) and a priority control valve (58) for controlling the supply of hydraulic fluid to the first priority actuator (47, 48) and for providing a load sense signal indicative of the load acting on the first priority actuator (47, 48); an auxiliary circuit (42) including at least a first auxiliary actuator (51) and at least a first auxiliary control valve (80) for controlling the supply of hydraulic fluid to the first auxiliary actuator (51); at least a first pump (46) for producing a flow of hydraulic fluid; and a priority valve (74) for distributing the flow from the pump (46) to the priority circuit (41) and auxiliary circuit (42) for operating the respective actuators thereof, with priority being given to the priority circuit (41) as a function of the load sense signal.Type: ApplicationFiled: April 19, 2021Publication date: October 7, 2021Inventors: Hao Zhang, Raymond Collett, Rajneesh Kumar, Qiang Wang, Miao Zhang, James Howland
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Publication number: 20210148087Abstract: A hydraulic system for recovering potential energy of a load implement of a mobile construction vehicle. The hydraulic system includes first and second actuators and control valving. The first and second actuators are configured to be coupled to the load implement for controlling raising and lowering of the load element. The control valving is operable between a first position at which, during a lowering of the load implement, the control valving directs hydraulic fluid from one of the first and second actuators to an accumulator to charge the accumulator, and a second position at which the control valving directs hydraulic fluid from the accumulator to one or more of the first and second actuators to power the one or more of the first and second actuators to raise the load element.Type: ApplicationFiled: January 28, 2021Publication date: May 20, 2021Inventors: Nicholas N. WHITE, James HOWLAND, Hao ZHANG, Blake CARL
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Patent number: 10941542Abstract: A hydraulic system for recovering potential energy of a load implement of a mobile construction vehicle. The hydraulic system includes first and second actuators and control valving. The first and second actuators are configured to be coupled to the load implement for controlling raising and lowering of the load element. The control valving is operable between a first position at which, during a lowering of the load implement, the control valving directs hydraulic fluid from one of the first and second actuators to an accumulator to charge the accumulator, and a second position at which the control valving directs hydraulic fluid from the accumulator to one or more of the first and second actuators to power the one or more of the first and second actuators to raise the load element.Type: GrantFiled: September 22, 2020Date of Patent: March 9, 2021Assignee: Parker-Hannifin CorporationInventors: Nicholas N. White, James Howland, Hao Zhang, Blake Carl
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Publication number: 20210002864Abstract: A hydraulic system for recovering potential energy of a load implement of a mobile construction vehicle. The hydraulic system includes first and second actuators and control valving. The first and second actuators are configured to be coupled to the load implement for controlling raising and lowering of the load element. The control valving is operable between a first position at which, during a lowering of the load implement, the control valving directs hydraulic fluid from one of the first and second actuators to an accumulator to charge the accumulator, and a second position at which the control valving directs hydraulic fluid from the accumulator to one or more of the first and second actuators to power the one or more of the first and second actuators to raise the load element.Type: ApplicationFiled: September 22, 2020Publication date: January 7, 2021Inventors: Nicholas N. WHITE, James HOWLAND, Hao ZHANG, Blake CARL
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Patent number: 10815646Abstract: A hydraulic system for recovering potential energy of a load implement of a mobile construction vehicle. The hydraulic system includes first and second actuators and control valving. The first and second actuators are configured to be coupled to the load implement for controlling raising and lowering of the load element. The control valving is operable between a first position at which, during a lowering of the load implement, the control valving directs hydraulic fluid from one of the first and second actuators to an accumulator to charge the accumulator, and a second position at which the control valving directs hydraulic fluid from the accumulator to one or more of the first and second actuators to power the one or more of the first and second actuators to raise the load element.Type: GrantFiled: June 11, 2019Date of Patent: October 27, 2020Assignee: Parker-Hannifin CorporationInventors: Nicholas N. White, James Howland, Hao Zhang, Blake Carl
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Patent number: 10819252Abstract: A device, system and method for harvesting electrical power from hydraulic fluid of a hydraulic system determines at least one of hydraulic fluid flow or hydraulic fluid pressure in the hydraulic system. Based on rules and the determined at least one of the hydraulic fluid flow or hydraulic fluid pressure, an expected conversion efficiency of the power conversion device and an expected rectified power to be generated from the received input power by the power conversion device are determined. From the expected rectified power a potential conversion efficiency of the power conversion device is determined, and the power conversion device is commanded to produce the expected rectified power when the potential conversion efficiency is greater than or equal to the expected conversion efficiency. When the potential conversion efficiency is less than the expected conversion efficiency, the rules are updated.Type: GrantFiled: April 19, 2018Date of Patent: October 27, 2020Assignee: Parker-Hannifin CorporationInventors: Jeff Cullman, Hao Zhang, James Howland, Zhesheng Jiang, Nicholas White
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Publication number: 20200067428Abstract: A device, system and method for harvesting electrical power from hydraulic fluid of a hydraulic system determines at least one of hydraulic fluid flow or hydraulic fluid pressure in the hydraulic system. Based on rules and the determined at least one of the hydraulic fluid flow or hydraulic fluid pressure, an expected conversion efficiency of the power conversion device and an expected rectified power to be generated from the received input power by the power conversion device are determined. From the expected rectified power a potential conversion efficiency of the power conversion device is determined, and the power conversion device is commanded to produce the expected rectified power when the potential conversion efficiency is greater than or equal to the expected conversion efficiency. When the potential conversion efficiency is less than the expected conversion efficiency, the rules are updated.Type: ApplicationFiled: April 19, 2018Publication date: February 27, 2020Inventors: Jeff Cullman, Hao Zhang, James Howland, Zhesheng Jiang, Nicholas White
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Publication number: 20190292752Abstract: A hydraulic system for recovering potential energy of a load implement of a mobile construction vehicle. The hydraulic system includes first and second actuators and control valving. The first and second actuators are configured to be coupled to the load implement for controlling raising and lowering of the load element. The control valving is operable between a first position at which, during a lowering of the load implement, the control valving directs hydraulic fluid from one of the first and second actuators to an accumulator to charge the accumulator, and a second position at which the control valving directs hydraulic fluid from the accumulator to one or more of the first and second actuators to power the one or more of the first and second actuators to raise the load element.Type: ApplicationFiled: June 11, 2019Publication date: September 26, 2019Inventors: Nicholas N. WHITE, James HOWLAND, Hao ZHANG, Blake CARL
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Patent number: 10358797Abstract: A hydraulic system for recovering potential energy of a load implement of a mobile construction vehicle. The hydraulic system includes first and second actuators and control valving. The first and second actuators are configured to be coupled to the load implement for controlling raising and lowering of the load element. The control valving is operable between a first position at which, during a lowering of the load implement, the control valving directs hydraulic fluid from one of the first and second actuators to an accumulator to charge the accumulator, and a second position at which the control valving directs hydraulic fluid from the accumulator to one or more of the first and second actuators to power the one or more of the first and second actuators to raise the load element.Type: GrantFiled: August 15, 2016Date of Patent: July 23, 2019Assignee: Parker-Hannifin CorporationInventors: Nicholas N. White, James Howland, Hao Zhang, Blake Carl
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Publication number: 20180216317Abstract: A hydraulic system for recovering potential energy of a load implement of a mobile construction vehicle. The hydraulic system includes first and second actuators and control valving. The first and second actuators are configured to be coupled to the load implement for controlling raising and lowering of the load element. The control valving is operable between a first position at which, during a lowering of the load implement, the control valving directs hydraulic fluid from one of the first and second actuators to an accumulator to charge the accumulator, and a second position at which the control valving directs hydraulic fluid from the accumulator to one or more of the first and second actuators to power the one or more of the first and second actuators to raise the load element.Type: ApplicationFiled: August 15, 2016Publication date: August 2, 2018Inventors: Nicholas N. WHITE, James HOWLAND, Hao ZHANG, Blake CARL
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Patent number: 10024341Abstract: A hybrid swing drive system (1) of a hydraulic construction machine includes a variable displacement hydraulic swing pump (3) operable by a prime mover (2); a hydraulic swing motor (16) for performing a swing function of the machine; an accumulator (10); a controller (244); a swing control valve assembly (15) disposed in a first hydraulic path extending from the swing pump to the swing motor, the swing control valve assembly having a first position fluidly connecting the swing pump to a first side of the swing motor and a second position fluidly connecting the swing pump to a second side of the swing motor; and an accumulator control valve (12) having an open position fluidly connecting the accumulator to the first hydraulic path at an accumulator control valve connection point and a closed position fluidly isolating the accumulator from the first hydraulic path.Type: GrantFiled: January 30, 2014Date of Patent: July 17, 2018Assignee: Parker-Hannifin CorporationInventors: Hao Zhang, Jeff Cullman, Raymond Collett, James Howland, Nick White, Patrick Stegemann
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Patent number: 9879403Abstract: A hydraulic machine includes an undercarriage; a rotating structure rotatably mounted on the undercarriage and configured to rotate with and with respect to the undercarriage; a first controller configured to receive user input and configured; a user interface configured to accept commands from a user and output a command signal to the controller; and a first gyroscope fixed to the rotating structure and electrically connected to the controller and configured to provide a data signal of rotation information of the rotating structure to the controller. An axis of rotation of the gyroscope is parallel to the axis of rotation of the rotating structure. The controller is configured to generate a control signal to control the rotating structure and cause the rotating structure to rotate with respect to the undercarriage based on the command signal from the user interface and the data signal from the first gyroscope.Type: GrantFiled: August 8, 2014Date of Patent: January 30, 2018Assignee: Parker-Hannifin CorporationInventors: Nicholas N. White, James Howland, Hao Zhang
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Publication number: 20170274930Abstract: A hydraulic system (40) for a work machine comprising a priority circuit (41) including at least a first priority actuator (47, 48) and a priority control valve (58) for controlling the supply of hydraulic fluid to the first priority actuator (47, 48) and for providing a load sense signal indicative of the load acting on the first priority actuator (47, 48); an auxiliary circuit (42) including at least a first auxiliary actuator (51) and at least a first auxiliary control valve (80) for controlling the supply of hydraulic fluid to the first auxiliary actuator (51); at least a first pump (46) for producing a flow of hydraulic fluid; and a priority valve (74) for distributing the flow from the pump (46) to the priority circuit (41) and auxiliary circuit (42) for operating the respective actuators thereof, with priority being given to the priority circuit (41) as a function of the load sense signal.Type: ApplicationFiled: November 24, 2015Publication date: September 28, 2017Applicant: Parker-Hannifin CorporationInventors: Hao Zhang, Raymond Collett, Rajneesh Kumar, Qiang Wang, Miao Zhang, James Howland
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Publication number: 20160168822Abstract: A hydraulic machine includes an undercarriage; a rotating structure rotatably mounted on the undercarriage and configured to rotate with and with respect to the undercarriage; a first controller configured to receive user input and configured; a user interface configured to accept commands from a user and output a command signal to the controller; and a first gyroscope fixed to the rotating structure and electrically connected to the controller and configured to provide a data signal of rotation information of the rotating structure to the controller. An axis of rotation of the gyroscope is parallel to the axis of rotation of the rotating structure. The controller is configured to generate a control signal to control the rotating structure and cause the rotating structure to rotate with respect to the undercarriage based on the command signal from the user interface and the data signal from the first gyroscope.Type: ApplicationFiled: August 8, 2014Publication date: June 16, 2016Applicant: Parker-Hannifin CorporationInventors: Nicholas N. White, James Howland, Hao Zhang
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Publication number: 20160010663Abstract: A hybrid swing drive system (1) of a hydraulic construction machine includes a variable displacement hydraulic swing pump (3) operable by a prime mover (2); a hydraulic swing motor (16) for performing a swing function of the machine; an accumulator (10); a controller (244); a swing control valve assembly (15) disposed in a first hydraulic path extending from the swing pump to the swing motor, the swing control valve assembly having a first position fluidly connecting the swing pump to a first side of the swing motor and a second position fluidly connecting the swing pump to a second side of the swing motor; and an accumulator control valve (12) having an open position fluidly connecting the accumulator to the first hydraulic path at an accumulator control valve connection point and a closed position fluidly isolating the accumulator from the first hydraulic path.Type: ApplicationFiled: January 30, 2014Publication date: January 14, 2016Inventors: Hao Zhang, Jeff Cullman, Raymond Collett, James Howland, Nick White, Patrick Stegemann
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Publication number: 20150361970Abstract: A compressor is provided suitable for compressing natural gas from a pressure associated with a residential gas supply to a pressure suitable for an automotive gas tank. The compressor utilizes a par of pneumatic cylinders driven by a hydraulic cylinder to compress the gas in a multi-stage process. Various embodiments are provided with respect to the gas compressor portion and the drive portion. A pressure boost system is also provided which utilizes an internal control valve and internal orifice through the piston of one of the pneumatic cylinders.Type: ApplicationFiled: February 4, 2014Publication date: December 17, 2015Applicant: Parker-Hannifin Corporation ("Parker")Inventors: Nicholas N. White, Blake Carl, Tim Beck, Raymond E. Collett, Christopher Parafinczuk, Thomas Biagi, James Howland, Hao Zhang
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Patent number: 7895125Abstract: State information is shared across domains. The state information is placed in one or more cookies that are shared across disjoint domains. An intermediary application is used, as one example, to enable the sharing of the state information (e.g., the cookies) across the different domains. The intermediary application is used to add state information to requests received from a client and to responses going to the client. Further, an intermediary application is used to cause a client to save state information for any range of Uniform Resource Locators (URLs), and to cause the client to send any previously stored state information to the intermediary application. Additionally, the intermediary application is used to cause state information previously saved by the client for one range of URLs to be subsequently saved by the client for one or more other range of URLs.Type: GrantFiled: October 4, 2007Date of Patent: February 22, 2011Assignee: International Business Machines CorporationInventors: Patrick Joseph Callaghan, Michael James Howland, Steven M. Pritko
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Patent number: 7302402Abstract: State information is shared across domains. The state information is placed in one or more cookies that are shared across disjoint domains. An intermediary application is used, as one example, to enable the sharing of the state information (e.g., the cookies) across the different domains. The intermediary application is used to add state information to requests received from a client and to responses going to the client. Further, an intermediary application is used to cause a client to save state information for any range of Uniform Resource Locators (URLs), and to cause the client to send any previously stored state information to the intermediary application. Additionally, the intermediary application is used to cause state information previously saved by the client for one range of URLs to be subsequently saved by the client for one or more other range of URLs.Type: GrantFiled: March 30, 1998Date of Patent: November 27, 2007Assignee: International Business Machines CorporationInventors: Patrick Joseph Callaghan, Michael James Howland, Steven M. Pritko
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Patent number: D745112Type: GrantFiled: April 21, 2014Date of Patent: December 8, 2015Assignee: Parker-Hannifin CorporationInventors: Clyde B Stevens, Dennis C Allen, Hao Zhang, James Howland, Michelle Tauchen, Shawn Vogel, Stephen Brunton, Yong Woon Jeon, Peter Stambro, Raymond E Collett