Patents by Inventor Leif Karlberg

Leif Karlberg 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).

  • Motor with spring elements formed on valve assembly
    Patent number: 5203251
    Abstract: The present invention relates to a valve assembly (10) which is mounted on a part (piston unit 40) of an air motor (10) arranged for reciprocating movement in a housing (cylinder 12). The valve assembly includes a first valve unit (50), which is mounted on one side of the part (40), and a second valve unit (70), which is mounted on the other side of the part (40). The second valve unit is connected to the first valve unit (50) by means of the part (40) for common movement with the first valve unit relative to the part (40) when the valve assembly is switched as the part (40) reaches one of its two end turning-positions.
    Type: Grant
    Filed: October 22, 1991
    Date of Patent: April 20, 1993
    Assignee: Alentec Orion Aktiebolag
    Inventor: Leif Karlberg