Patents by Inventor Bryan Jacob Hillman

Bryan Jacob Hillman 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).

  • Boom cylinder dig flow regeneration
    Patent number: 9261118
    Abstract: A hydraulic system and methods for conserving energy in such system is disclosed. The hydraulic system includes a hydraulic actuator having a head end, a rod end and a piston disposed therebetween. The system also includes a pump that pumps fluid to the actuator, a first valve disposed downstream of the rod end, and a second valve disposed between the pump and the head end of the actuator. When the system is in a load overrunning condition, the second valve is partially closed to restrict the flow of a combined fluid. The combined fluid including fluid received from the pump and fluid received from the rod end of the actuator. When the system is in the light resistive load condition, the second valve is open to allow the combined fluid to flow through the second valve.
    Type: Grant
    Filed: January 15, 2014
    Date of Patent: February 16, 2016
    Assignee: Caterpillar Inc.
    Inventors: Jiao Zhang, Pengfei Ma, Vickram Murugesan, Tonglin Shang, Bryan Jacob Hillman
  • Boom Cylinder Dig Flow Regeneration
    Publication number: 20150197915
    Abstract: A hydraulic system and methods for conserving energy in such system is disclosed. The hydraulic system includes a hydraulic actuator having a head end, a rod end and a piston disposed therebetween. The system also includes a pump that pumps fluid to the actuator, a first valve disposed downstream of the rod end, and a second valve disposed between the pump and the head end of the actuator. When the system is in a load overrunning condition, the second valve is partially closed to restrict the flow of a combined fluid. The combined fluid including fluid received from the pump and fluid received from the rod end of the actuator. When the system is in the light resistive load condition, the second valve is open to allow the combined fluid to flow through the second valve.
    Type: Application
    Filed: January 15, 2014
    Publication date: July 16, 2015
    Applicant: Caterpillar, Inc.
    Inventors: Jiao Zhang, Pengfei Ma, Vickram Murugesan, Tonglin Shang, Bryan Jacob Hillman
  • Hydraulic Circuits with Energy Conservation Features for Overrunning Load Conditions
    Publication number: 20130318959
    Abstract: A hydraulic system is disclosed that includes a hydraulic actuator having a head end, a rod end and a piston disposed therebetween. The system also includes a pump configured to supply fluid to both ends of the actuator. The system also includes an energy conservation system that is configured to reduce flow from the pump to the head end of the actuator and to increase flow from a make-up fluid circuit to the head end of the actuator during an overrunning load condition. The energy conservation system also increases flow from the pump to the head end of the actuator and decreases flow from the make-up circuit to the head end of the actuator after the overrunning load condition has ceased.
    Type: Application
    Filed: June 4, 2012
    Publication date: December 5, 2013
    Applicant: CATERPILLAR, INC.
    Inventors: Tonglin Shang, Jiao Zhang, Bryan Jacob Hillman, Vickram Murugesan