Patents by Inventor Kirk Stephen Shively

Kirk Stephen Shively 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).

  • Control for electro-hydraulic valve arrangement
    Patent number: 6598391
    Abstract: A system and method for controlling an electro-hydraulic valve arrangement to provide make-up fluid to a hydraulic actuator are disclosed. The system includes an electro-hydraulic valve arrangement actuated by a control lever and disposed between a pump having a stand-by pressure and a hydraulic actuator. A pressure, representative of the fluid in the hydraulic actuator, is sensed and compared to the stand-by pressure of the pump. The control of the control lever over the electro-hydraulic valve arrangement is overridden when the difference between the pump stand-by pressure and the pressure of the fluid in the hydraulic actuator is greater than a predetermined pressure limit.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: July 29, 2003
    Assignee: Caterpillar Inc
    Inventors: Stephen Victor Lunzman, Xiaodong Huang, Kirk Stephen Shively, Bradford Jay Holt
  • Control for electro-hydraulic valve arrangement
    Publication number: 20030041728
    Abstract: A system and method for controlling an electro-hydraulic valve arrangement to provide make-up fluid to a hydraulic actuator are disclosed. The system includes an electro-hydraulic valve arrangement actuated by a control lever and disposed between a pump having a stand-by pressure and a hydraulic actuator. A pressure, representative of the fluid in the hydraulic actuator, is sensed and compared to the stand-by pressure of the pump. The control of the control lever over the electro-hydraulic valve arrangement is overridden when the difference between the pump stand-by pressure and the pressure of the fluid in the hydraulic actuator is greater than a predetermined pressure limit.
    Type: Application
    Filed: August 28, 2001
    Publication date: March 6, 2003
    Applicant: Caterpillar Inc.
    Inventors: Stephen Victor Lunzman, Xiaodong Huang, Kirk Stephen Shively, Bradford Jay Holt