Patents by Inventor Renate Ruf

Renate Ruf 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).

  • Rotary piston compressor
    Patent number: 5076768
    Abstract: A rotary piston compressor with parallel internal axes has a driven external rotor (12) with a compression chamber (17) in which an internal rotor (20) is rotatably mounted. The internal rotor (20) is hollow, made of light metal, and mounted on a shaft (21). Perfect balancing of the masses of the internal rotor (20) is achieved by having metal pins (42,43) which extend the full length of the internal rotor (20). The heavy metal pin (43) also prevents rotation of the internal rotor (20) about the shaft (21) when these parts are not monolithic.
    Type: Grant
    Filed: March 30, 1990
    Date of Patent: December 31, 1991
    Assignee: Renate Ruf
    Inventors: Renate Ruf, Rudolf Bierling