Patents by Inventor Victor Wen

Victor Wen 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).

  • Patent number: 8997479
    Abstract: A hydraulic control system is disclosed for use with a machine. The hydraulic control system may have a pump, a tank, and an actuator. The hydraulic control system may also have at least a first valve configured to control fluid flow between the pump, the tank, a first chamber of the actuator, and a second chamber of the actuator; a second valve fluidly disposed between the second chamber and the tank; and a third valve fluidly disposed between the first and second chambers. The hydraulic control system may further have a controller configured to selectively cause the second valve to block fluid flow from the second chamber of the actuator to the tank, and to selectively cause the third valve to fluidly communicate the first and second chambers of the actuator when the second valve blocks fluid flow from the second chamber of the actuator to the tank.
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: April 7, 2015
    Assignee: Caterpillar Inc.
    Inventors: Gang Victor Wen, Jiao Zhang, Pengfei Ma, Tonglin Shang
  • Publication number: 20140230420
    Abstract: An energy recovery system is disclosed for use with a hydraulic machine. The energy recovery system may have a tank, a pump configured to draw fluid from the tank and pressurize the fluid, an actuator, and an actuator control valve movable to direct pressurized fluid from the pump to the actuator and from the actuator to the tank to move the actuator. The energy recovery system may also have a motor mechanically connected to a rotary device and configured to selectively receive fluid discharged from the actuator, and at least one valve movable to selectively redirect fluid exiting the motor back to the actuator.
    Type: Application
    Filed: February 19, 2013
    Publication date: August 21, 2014
    Applicant: CATERPILLAR INC.
    Inventors: Pengfei MA, Tonglin SHANG, Jiao ZHANG, Dayao CHEN, Gang Victor WEN
  • Publication number: 20140208728
    Abstract: A hydraulic control system includes a swing control valve between a pump and a swing motor to control flow to/from the swing motor, and a selector valve between an accumulator and the swing motor to regulate fluid flow. A controller is configured to receive inputs indicative of the pressure differential between the accumulator and conduit between the pump and swing motor, and a swing motor command, calculate a target swing motor flow based on the swing motor command input, and modulate operation of the swing control valve and the selector valve to regulate a swing speed.
    Type: Application
    Filed: January 28, 2013
    Publication date: July 31, 2014
    Applicant: CATERPILLAR INC.
    Inventors: Pengfei Ma, Victor Wen, Jiao Zhang, Dayao Chen, Tonglin Shang, Aleksandar M. Egelja
  • Patent number: 8771213
    Abstract: Orthopaedic foot support (1) to support long-term bedridden patients, characterized in that the foot support includes a preformed support of two parts, i.e. a top piece (2) that consists of a stiff cushion (3) with an erect wall (4) and transverse supports (5,6,7) connected to it for the lateral support of the lower legs (16), and a bottom piece that consists of a base (8) on which the lower legs can rest and whereby the base (8) has a pair of cambers (10) to support the lower legs (16), and whereby the base (8) can be exchanged by a base with different cambers (10) suitable for another leg dimension, and whereby the top piece (2) can be removed to gain access to the legs of the patient who remains lying on the base (8), without having to move this base (8) or the legs (16).
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: July 8, 2014
    Assignee: Theweco BVBA
    Inventor: Heidi Jeanne Victor Wens
  • Publication number: 20140119867
    Abstract: An energy recovery system for a machine is disclosed. The energy recovery system may have a boom circuit with at least a one linear actuator configured to move a work tool, and a boom accumulator configured to selectively collect pressurized fluid from the at least one linear actuator and to discharge pressurized fluid back to the at least one linear actuator. The energy recovery system may also have a swing circuit with a swing motor configured to move the work tool, and a swing accumulator configured to selectively collect pressurized fluid from the swing motor and discharge pressurized fluid back to the swing motor. The energy recovery system may further have a common accumulator passage fluidly connecting the boom accumulator and the swing accumulator.
    Type: Application
    Filed: October 31, 2012
    Publication date: May 1, 2014
    Applicant: CATERPILLAR INC.
    Inventors: Gang Victor WEN, Pengfei MA, Jiao ZHANG, Tonglin SHANG
  • Publication number: 20140119868
    Abstract: An energy recovery system for a machine is disclosed. The energy recovery system may have a tank, a pump configured to draw fluid from the tank and pressurize the fluid, an actuator, and an actuator control valve movable to direct pressurized fluid from the pump to the actuator and from the actuator to the tank to move the actuator. The energy recovery system may also have a motor connected to selectively receive fluid discharged from the actuator and mechanically connected to the pump, and an accumulator configured to store fluid discharged from the motor and to direct stored fluid to the motor to drive the pump.
    Type: Application
    Filed: October 31, 2012
    Publication date: May 1, 2014
    Applicant: CATERPILLAR INC.
    Inventors: Gang Victor WEN, Pengfei MA, Jiao ZHANG, Tonglin SHANG
  • Publication number: 20140026546
    Abstract: A regeneration valve for a hydraulic circuit may include a valve element for controlling flow between first, second, and third ports. The valve element may be formed with a flow slot that generates a slot flow force when hydraulic fluid flows therethrough. The flow slot may be configured so that a predetermined fluid low rate may generate a slot flow force sufficient to actuate the valve element from a first position to a second position. In the second position, the valve element may divert a portion of flow from the second port to the first port is diverted to the third port. The flow slot may be configured so that the fluid exits the slot at an exit angle that varies as the valve element moves between first and second positions, thereby to provide a more uniform flow force across the range of travel of the valve element.
    Type: Application
    Filed: July 25, 2012
    Publication date: January 30, 2014
    Applicant: CATERPILLAR, INC.
    Inventors: Kevin A. Bacon, Gang Victor Wen, Wesley Thomas Payne
  • Publication number: 20130340418
    Abstract: An energy storage system is disclosed for use in a hydraulic system for moving a structural member such as a boom assembly. The system features at least one work cylinder and an additional energy storage cylinder that assists in raising and lowering functions by storing and withdrawing pressurized fluid from an accumulator. The pressurized fluid in the accumulator may be used for raising operations as well as digging and tamping operations. Further, the energy recovery features may be selectively disconnected during either a raising or lowering operation.
    Type: Application
    Filed: June 21, 2012
    Publication date: December 26, 2013
    Applicant: CATERPILLAR, INC.
    Inventors: Gang Victor Wen, Pengfei Ma, Jiao Zhang
  • Publication number: 20130318955
    Abstract: A hydraulic system includes a hydraulic actuator, a pump configured to supply fluid to the hydraulic actuator, and a first accumulator fluidly connected to the hydraulic actuator. The first accumulator is configured to store fluid received from the hydraulic actuator. The hydraulic system also includes a motor drivingly connected to the pump and fluidly connected to the first accumulator. The motor is configured to receive the stored fluid from the first accumulator to drive the pump. The hydraulic system further includes a first discharge valve fluidly connected between the first accumulator and the hydraulic actuator. The first discharge valve is configured to supply the stored fluid from the first accumulator to the hydraulic actuator without the stored fluid from the first accumulator circulating through the pump.
    Type: Application
    Filed: June 4, 2012
    Publication date: December 5, 2013
    Inventors: Jiao ZHANG, Pengfei Ma, Tonglin Shang, Gang Victor Wen, Bryan Edward Nelson, Dayao Chen
  • Publication number: 20130283777
    Abstract: A hydraulic control system is disclosed for use with a machine. The hydraulic control system may have a pump, a tank, and an actuator. The hydraulic control system may also have at least a first valve configured to control fluid flow between the pump, the tank, a first chamber of the actuator, and a second chamber of the actuator; a second valve fluidly disposed between the second chamber and the tank; and a third valve fluidly disposed between the first and second chambers. The hydraulic control system may further have a controller configured to selectively cause the second valve to block fluid flow from the second chamber of the actuator to the tank, and to selectively cause the third valve to fluidly communicate the first and second chambers of the actuator when the second valve blocks fluid flow from the second chamber of the actuator to the tank.
    Type: Application
    Filed: April 27, 2012
    Publication date: October 31, 2013
    Inventors: Gang Victor WEN, Jiao Zhang, Pengfei Ma, Tonglin Shang
  • Publication number: 20130012854
    Abstract: Orthopaedic foot support (1) to support long-term bedridden patients, characterised in that the foot support includes a preformed support of two parts, i.e. a top piece (2) that consists of a stiff cushion (3) with an erect wall (4) and transverse supports (5,6,7) connected to it for the lateral support of the lower legs (16), and a bottom piece that consists of a base (8) on which the lower legs can rest and whereby the base (8) has a pair of cambers (10) to support the lower legs (16), and whereby the base (8) can be exchanged by a base with different cambers (10) suitable for another leg dimension, and whereby the top piece (2) can be removed to gain access to the legs of the patient who remains lying on the base (8), without having to move this base (8) or the legs (16).
    Type: Application
    Filed: March 21, 2011
    Publication date: January 10, 2013
    Inventor: Heidi Jeanne Victor Wens
  • Publication number: 20120152107
    Abstract: A hydraulic circuit capable of both a regeneration mode of operation and a full force mode of operation includes a poppet valve controlled by a control valve operating in conjunction with a shuttle valve. The opening of the poppet valve enables the regeneration mode of operation, and the closing of the poppet valve enables the full force mode of operation.
    Type: Application
    Filed: December 6, 2011
    Publication date: June 21, 2012
    Applicant: Caterpillar Inc.
    Inventors: Timothy Hand, Kevin Bacon, Victor Wen
  • Publication number: 20070200388
    Abstract: The power steering pump of a vehicle powers an auxiliary hydraulic system of the vehicle only when the vehicle is parked.
    Type: Application
    Filed: November 8, 2006
    Publication date: August 30, 2007
    Inventors: Nikesh Bakshi, Victor Wen