Patents by Inventor Richard Levinsohn, deceased

Richard Levinsohn, deceased 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 sealing member and process
    Patent number: 3971566
    Abstract: Disclosed herein is a metallic V-ring sealing member capable of sealing hydraulic fluid against egress from a hydraulic system. The sealing member of the invention is fabricated from a metal capable of undergoing an austenitic to martensitic state change upon cooling below a transition temperature and of undergoing a further transformation from martensitic to austenitic state upon warming to a temperature of less than the operating temperature of the system. By the process of the invention, a hydraulic system may be sealed by cooling the sealing member of the invention below its transition temperature, placing the sealing member in sealing relationship to the parts of the system to be sealed and warming the sealing member to effect a transformation from its martensitic state to its austenitic state.
    Type: Grant
    Filed: January 6, 1975
    Date of Patent: July 27, 1976
    Assignee: Raychem Corporation
    Inventors: Richard Levinsohn, deceased, Joseph Levinson, administrator-with-will-annexed, James E. Jervis