Patents by Inventor Jeffrey Tippton

Jeffrey Tippton 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).

  • Publication number: 20070012172
    Abstract: A control valve for a hydraulic power steering system includes a pair of flow circuits arranged in parallel. Each flow circuit includes an upstream and downstream flow orifices arranged in series. Each set of orifices defines between the orifices an intermediate pressure zone of the valve. Both orifices close together from a centered condition of the valve and fully close substantially together at a fully closed condition of the valve. The downstream orifice is larger than the upstream orifice when open to minimize the likelihood of cavitation and noise. An equalization passage fluidly connects both intermediate pressure zones to equalize pressure despite variations in orifice size due to manufacturing tolerances. The control valve includes a bypass passage in parallel with the flow circuits. A pressure relief valve in the control valve has a normally closed valving member in the bypass passage that opens the valve in the event of overpressure.
    Type: Application
    Filed: September 15, 2006
    Publication date: January 18, 2007
    Applicant: R.H. SHEPPARD CO., INC.
    Inventors: David Danley, Kenneth Giurlando, Jeffrey Tippton
  • Publication number: 20050217739
    Abstract: A control valve for a hydraulic power steering system includes a pair of flow circuits arranged in parallel. Each flow circuit includes an upstream and downstream flow orifices arranged in series. Each set of orifices defines between the orifices an intermediate pressure zone of the valve. Both orifices close together from a centered condition of the valve and fully close substantially together at a fully closed condition of the valve. The downstream orifice is larger than the upstream orifice when open to minimize the likelihood of cavitation and noise. An equalization passage fluidly connects both intermediate pressure zones to equalize pressure despite variations in orifice size due to manufacturing tolerances. The control valve includes a bypass passage in parallel with the flow circuits. A pressure relief valve in the control valve has a normally closed valving member in the bypass passage that opens the valve in the event of overpressure.
    Type: Application
    Filed: April 5, 2004
    Publication date: October 6, 2005
    Inventors: David Danley, Kenneth Giurlando, Jeffrey Tippton