Patents by Inventor Frank S. Wallis

Frank S. Wallis 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).

  • Refrigerant compressor
    Patent number: 5038891
    Abstract: A refrigeration compressor is disclosed which incorporates an improved lubrication system to insure adequate lubrication to all bearings via a single elongated axial offset passage provided in the crankshaft. The lubrication system also incorporates a passage arrangement which serves to vent any refrigerant gases which may be encountered as well as to prevent priming of the vent passage which could result in transfer of lubricant into the motor compartment.
    Type: Grant
    Filed: April 12, 1990
    Date of Patent: August 13, 1991
    Assignee: Copeland Corporation
    Inventor: Frank S. Wallis