Patents by Inventor Karl Gustav Berger

Karl Gustav Berger 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).

  • Safety valve for pneumatic tools
    Patent number: 4106750
    Abstract: A safety valve for pneumatic tools, comprising first and second valve bodies which are movable relative to each other and which carry cooperating seat surfaces. The first valve body is of tubular shape and is displaceable between a closed and an opened position by means of a lever.The second valve body is pressure balanced and biased by a spring to maintain sealing contact with the first valve body as the latter is displaced. A lever operated arresting means is arranged to lock the second valve body against movement and thereby interrupt the sealing contact between the first and second valve bodies as the first valve body is displaced.
    Type: Grant
    Filed: November 2, 1976
    Date of Patent: August 15, 1978
    Assignee: Atlas Copco Aktiebolag
    Inventors: Karl Gosta Karden, Karl Gustav Berger
  • Portable grinding machine
    Patent number: D287330
    Type: Grant
    Filed: May 29, 1984
    Date of Patent: December 23, 1986
    Assignee: Atlas Copco AB
    Inventors: Karl G. Karden, Karl-Gustav Berger
  • Portable grinding machine
    Patent number: D288768
    Type: Grant
    Filed: May 29, 1984
    Date of Patent: March 17, 1987
    Assignee: Atlas Copco AG
    Inventors: Karl G. Karden, Karl-Gustav Berger