Patents by Inventor Siegfried Ryssel

Siegfried Ryssel 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).

  • Lubricating-oil pump arrangement for a motor-driven apparatus
    Patent number: 4644658
    Abstract: The invention is directed to a motor-driven apparatus such as a motor-driven chain saw or the like. It includes a lubricating-oil pump and an oil supply for a work tool and is equipped with a device for interrupting the supply of oil to the tool. This facilitates use of the chain saw apparatus with an accessory attachment work tool such as a hedge trimmer, drilling tool or the like for which a flow of lubricating oil is unnecessary.
    Type: Grant
    Filed: December 11, 1984
    Date of Patent: February 24, 1987
    Assignee: Andreas Stihl
    Inventors: Hans Dolata, Reinhold Fink, Gerd Itzrodt, Adam Kelbert, Siegfried Ryssel, Anton Wehle, Dieter Wieland, Gerhard Zerrer