Patents by Inventor Thomas W. Roeber

Thomas W. Roeber 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).

  • Pressure recovery system
    Patent number: 8181458
    Abstract: A pressure recovery system according to the present invention comprises a pump, a flow control valve and a flow amplifier. The flow control valve has an inlet connected to the outlet of the pump, an outlet for supplying fluid to the load to which pressurized fluid is to be supplied, and a bypass flow outlet connected to the flow amplifier. The bypass flow drives the flow amplifier for supplying fluid to an inlet of the pump.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: May 22, 2012
    Assignee: Parker-Hannifin Corporation
    Inventor: Thomas W. Roeber
  • Rotary control valve for a hydrostatic transmission
    Patent number: 7614227
    Abstract: A rotary control valve for a vehicle hydrostatic transmission includes a hydraulic pump and a hydraulic motor. The valve is configured to control both a direction and a speed of the hydrostatic transmission. The rotary control valve includes a rotary valve plate configured to oscillate through a range of less than 180 degrees independently of the pump and the motor.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: November 10, 2009
    Assignee: Briggs and Stratton Corporation
    Inventors: Robert Carlson, Thomas W. Roeber, Omid Ghayebi
  • PRESSURE RECOVERY SYSTEM
    Publication number: 20090084104
    Abstract: A pressure recovery system according to the present invention comprises a pump, a flow control valve and a flow amplifier. The flow control valve has an inlet connected to the outlet of the pump, an outlet for supplying fluid to the load to which pressurized fluid is to be supplied, and a bypass flow outlet connected to the flow amplifier. The bypass flow drives the flow amplifier for supplying fluid to an inlet of the pump.
    Type: Application
    Filed: September 29, 2008
    Publication date: April 2, 2009
    Inventor: Thomas W. Roeber
  • ROTARY CONTROL VALVE FOR A HYDROSTATIC TRANSMISSION
    Publication number: 20080028759
    Abstract: A rotary control valve for a vehicle hydrostatic transmission includes a hydraulic pump and a hydraulic motor. The valve is configured to control both a direction and a speed of the hydrostatic transmission. The rotary control valve includes a rotary valve plate configured to oscillate through a range of less than 180 degrees independently of the pump and the motor.
    Type: Application
    Filed: July 31, 2007
    Publication date: February 7, 2008
    Applicant: BRIGGS & STRATTON CORPORATION
    Inventors: Robert Carlson, Thomas W. Roeber, Omid Ghayebi