Patents by Inventor Arne Engquist

Arne Engquist 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).

  • Piston cylinder assembly
    Patent number: 3999467
    Abstract: A piston-cylinder assembly having a circumferential groove around the piston near the end of the piston facing the cylinder chamber, a cuff around the piston at a location more remote from said chamber from the groove, a guide ring mounted in the groove for slideably abutting the cylinder wall, the guide ring having a convex inner configuration and a generally cylindrical outer configuration.
    Type: Grant
    Filed: September 11, 1975
    Date of Patent: December 28, 1976
    Assignee: AB Bahco Verktyg
    Inventor: Arne Engquist