Patents by Inventor Robert E. Holder

Robert E. Holder 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 relief valve with bidirectional damping
    Patent number: 6957660
    Abstract: A pressure relief valve has a valve element that is biased by a spring into a closed position. A pressure being controlled is applied to the valve element to counter the force of the spring. When the pressure applied to the valve element exceeds the force of the spring the pressure relief opens, otherwise the valve closes. The pressure is applied through a damping orifice which controls the rate at which the applied pressure can increase and decrease thus delaying the response of the pressure relief valve to pressure changes in both directions. The relative size relationship between the inlet and outlet can be varied to define the pressure-flow characteristic of the pressure relief valve.
    Type: Grant
    Filed: March 6, 2003
    Date of Patent: October 25, 2005
    Assignee: Eaton Corporation
    Inventor: Robert E. Holder
  • Pressure relief valve with bidirectional damping
    Publication number: 20040173264
    Abstract: A pressure relief valve has a valve element that is biased by a spring into a closed position. A pressure being controlled is applied to the valve element to counter the force of the spring. When the pressure applied to the valve element exceeds the force of the spring the pressure relief opens, otherwise the valve closes. The pressure is applied through a damping orifice which controls the rate at which the applied pressure can increase and decrease thus delaying the response of the pressure relief valve to pressure changes in both directions. The relative size relationship between the inlet and outlet can be varied to define the pressure-flow characteristic of the pressure relief valve.
    Type: Application
    Filed: March 6, 2003
    Publication date: September 9, 2004
    Inventor: Robert E. Holder