Patents by Inventor Goetz Landwehr

Goetz Landwehr 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).

  • Silencer, especially for portable motor chain saws
    Patent number: 4142607
    Abstract: Disclosed is an exhaust silencer suitable for use with portable combustion engines, and particularly for use with chain saw engines, comprising a chamber having an inlet and outlet for receiving the engine exhaust; means disposed about the chamber outlet for reducing the kinetic energy of the exhaust flowing therethrough; and an air duct means mounted exteriorly of the chamber below the chamber outlet for cooling the chamber, the kinetic energy reducing means, and the exhaust gas by contact with a stream of ambient air flowing therethrough.
    Type: Grant
    Filed: September 23, 1977
    Date of Patent: March 6, 1979
    Assignee: Firma Andreas Stihl
    Inventors: Goetz Landwehr, Helmut Lux, Karl-Heinz Duemmel
  • Spring type guide bar stop for portable power chain saw
    Patent number: 4123843
    Abstract: A spring action guide bar stop for portable power chain saw is located adjacent the saw housing near where the chain returns to the housing to absorb and dampen vibration during operation of the saw. The spring stop is preferably a leaf spring coiled into a loop so that the side of the loop contacts the object being cut with friction dampening being obtained by providing frictional contact between the ends of the spring loop.
    Type: Grant
    Filed: July 18, 1977
    Date of Patent: November 7, 1978
    Assignee: Firma Andreas Stihl
    Inventors: Peter Bauer, Guenter Dietzsch, Goetz Landwehr, Gotthilf Schulin