Patents by Inventor Robert William Hammond

Robert William Hammond 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).

  • Dual hydraulic power steering system
    Patent number: 8695750
    Abstract: A hydraulic power steering system controllable by left and right steering wheels has two control valves, each valve connected to a respective left and right steering wheel, and a valve arrangement that selectively connects one control valve to a source of high-pressure fluid and disconnects the other control valve from the source of high-pressure fluid.
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: April 15, 2014
    Assignee: R.H. Sheppard Co., Inc.
    Inventors: Robert William Hammond, Jeffrey Edward Tipton