Patents by Inventor Marianus H. J. M. Zwaans

Marianus H. J. M. Zwaans 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).

  • Lubricated rotary compressor having a cooling medium inlet to the delivery port
    Patent number: 5273412
    Abstract: A rotary compressor such as a screw-type or a spiral compressor comprises a compressor stator and one or more rotary compression elements, which compressor stator is provided with a suction port, a delivery port and a lubricant inlet, the lubricant being intended for lubricating each compression element, for sealing the gaps between the individual compression elements and between the compression elements and the compressor stator, and for cooling the medium to be compressed during the compression process. The compressor also comprises an inlet for a cooling medium for cooling the lubricant which opens out near or in the delivery port.
    Type: Grant
    Filed: May 6, 1993
    Date of Patent: December 28, 1993
    Assignee: Grasso's Koninklijke Machinefabrieken N.V.
    Inventor: Marianus H. J. M. Zwaans