Patents by Inventor John M. Preble

John M. Preble 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).

  • Hydraulic power supply with hermetic sealing of hydraulic fluid and sealing method
    Patent number: 4488856
    Abstract: A hermetically sealed hydraulic power supply having an oil reservoir with a pump for pumping oil from the reservoir which is driven by a gas turbine. The gas turbine has a turbine cavity and fluid inlet and exhaust passages communicating therewith. A pair of burst discs are positioned to block the turbine cavity and a quantity of oil fills the turbine cavity and extends to the burst discs to isolate the oil reservoir from the environment and preclude the existence of any space to which reservoir oil could leak. A bellows is positioned to permit thermal expansion and contraction of the oil sealed in the turbine cavity by the burst discs.
    Type: Grant
    Filed: September 26, 1983
    Date of Patent: December 18, 1984
    Assignee: Sundstrand Corporation
    Inventors: John M. Preble, John A. Anderson, Lawrence D. McGee