Patents by Inventor Richard A. Brautigan

Richard A. Brautigan 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).

  • Butterfly valve sealing means having an improved O-ring groove
    Patent number: 4395017
    Abstract: An improved O-ring groove for a sealing member, the groove being formed in the sealing surface of the member, the groove in cross-section having an outer portion communicating with the sealing surfaces and an inner portion, the inner portion being of width greater than the outer portion, the juncture of the inner and outer portions providing opposed ledge surfaces, the cross-sectional area of the groove inner portion being greater than that of the outer portion and a gasket preferably in the form of an O-ring received in the groove substantially filling the groove inner and outer portions and normally extending slightly beyond the sealing surface.
    Type: Grant
    Filed: December 21, 1981
    Date of Patent: July 26, 1983
    Assignee: Dover Corporation
    Inventor: Richard A. Brautigan