Patents by Inventor Alan Wycliffe Sparrow

Alan Wycliffe Sparrow 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).

  • Seals
    Patent number: 4026562
    Abstract: A seal for reciprocating members such as a shaft having a seal ring of deformable material on which an annular taper is maintained to provide pumping action for return of fluid to replenish fluid lost past the seal.
    Type: Grant
    Filed: May 27, 1975
    Date of Patent: May 31, 1977
    Assignee: Perkins Engines Limited
    Inventor: Alan Wycliffe Sparrow