Patents by Inventor Dietmar Rook

Dietmar Rook 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).

  • Screw compressor with cooling
    Patent number: 5924855
    Abstract: The invention provides a two-rotors screw compressor having active cooling means on the pressure side of the motive rotor.
    Type: Grant
    Filed: December 15, 1997
    Date of Patent: July 20, 1999
    Assignee: SIHI Industry Consult GmbH
    Inventors: Christian Dahmlos, Dietmar Rook, Ralf Steffens
  • Vacuum pump
    Patent number: 5904473
    Abstract: A vacuum pump contains two rotary displacement rotor (8) that engage each other, in particular in a convoluted manner, inside in expansion chamber through which flows a stream in the axial direction. The rotors are mounted in cantilever at the delivery side and are linked each to a driving motor (35, 36). Each rotor (8) forms together with its shaft (20), a stationary bearing body (7) and a bearing (21, 22) delimited by the shaft (20) and the bearing body (7) a module that may be removed as a single unit from the housing (3). The rotor (35) of the driving motor is preferably also part of said module.
    Type: Grant
    Filed: December 17, 1997
    Date of Patent: May 18, 1999
    Assignee: SIHI Industry Consult GmbH
    Inventors: Christian Dahmlos, Dietmar Rook, Ralf Steffens