Patents by Inventor Curtis E. Johns

Curtis E. Johns 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).

  • Siphon prevention in a compressor lubrication system
    Patent number: 6126411
    Abstract: In open drive refrigerant compressors, the location where the shaft extends through the casing provides a potential location for leakage of refrigerant. Where a shaft seal is used which requires an oil seal, the draining of oil from the shaft seal cavity, upon stopping the compressor, is prevented by placing a check valve downstream of the shaft seal cavity which forms a part of the oil distribution system. An optional check valve may be located upstream of the shaft seal cavity.
    Type: Grant
    Filed: September 3, 1998
    Date of Patent: October 3, 2000
    Assignee: Carrier Corporation
    Inventors: Paul J. Flanigan, Curtis E. Johns