Patents by Inventor Allen J. Friede

Allen J. Friede 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).

  • Adjustable lip type seal for a crankshaft
    Patent number: 4021049
    Abstract: A lip seal assembly provides an axially adjustable seal between a rotating shaft, such as a crankshaft, and a stationary housing, such as an engine block. The assembly includes a generally ring shaped retainer circumscribing the shaft and having a hollow, cylindrical cavity therein which receives a slidably positioned lip seal mounting member. A plurality of ring shaped spacer gaskets enable the lip seal to be axially adjusted within the cavity such that the point of engagement of the lip seal with a running surface of the shaft may be changed.
    Type: Grant
    Filed: December 15, 1975
    Date of Patent: May 3, 1977
    Assignee: Caterpillar Tractor Co.
    Inventors: Elmer B. Phelps, Allen J. Friede