Patents by Inventor Gunter G. Matt

Gunter G. Matt 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).

  • Automated shifting of hydraulic drive systems
    Patent number: 9382925
    Abstract: A drive system for propelling a power machine over a support surface is disclosed. The drive system includes a hydraulic pressure source and a drive assembly. The drive assembly has a hydraulic motor in fluid communication with the hydraulic pressure source that is switchable between first and second displacement arrangements. A shift valve receives pressurized fluid from the hydraulic pressure source and provides a shift signal to the hydraulic motor to selectively cause the displacement of the hydraulic motor to shift between the first and second displacement arrangements. A sensing device capable of generating a load signal indicative of a load condition provided by the drive assembly is also provided. An electronic controller provides a control signal to the shift valve to control the displacement of the hydraulic motor in response at least in part due to the load signal.
    Type: Grant
    Filed: March 2, 2012
    Date of Patent: July 5, 2016
    Assignee: Clark Equipment Company
    Inventors: Patrick P. Lacher, Daniel J. Krieger, Gunter G. Matt
  • AUTOMATED SHIFTING OF HYDRAULIC DRIVE SYSTEMS
    Publication number: 20130133319
    Abstract: A drive system for propelling a power machine over a support surface is disclosed. The drive system includes a hydraulic pressure source and a drive assembly. The drive assembly has a hydraulic motor in fluid communication with the hydraulic pressure source that is switchable between first and second displacement arrangements. A shift valve receives pressurized fluid from the hydraulic pressure source and provides a shift signal to the hydraulic motor to selectively cause the displacement of the hydraulic motor to shift between the first and second displacement arrangements. A sensing device capable of generating a load signal indicative of a load condition provided by the drive assembly is also provided. An electronic controller provides a control signal to the shift valve to control the displacement of the hydraulic motor in response at least in part due to the load signal.
    Type: Application
    Filed: March 2, 2012
    Publication date: May 30, 2013
    Applicant: CLARK EQUIPMENT COMPANY
    Inventors: Patrick P. Lacher, Daniel J. Krieger, Gunter G. Matt