Patents by Inventor M. Wayne Perkins

M. Wayne Perkins 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).

  • Gas spring actuator
    Patent number: 5140894
    Abstract: A gas spring actuator which, when attached to a valve, will return the valve to its initial position after the valve has been moved to a second position by application of a pressurized fluid that opposes the gas spring. The gas spring is charged to a predetermined gas pressure. A hydraulic fluid is applied in an opposing manner to drive the piston in one direction to operate the valve and simultaneously pressurize the gas in the gas spring. Upon removal of the hydraulic pressure, the pressurized gas returns the piston, and the valve, to its initial position.
    Type: Grant
    Filed: January 16, 1991
    Date of Patent: August 25, 1992
    Assignee: Axelson, Inc.
    Inventors: David E. Snyder, M. Wayne Perkins, Joe D. Maxwell