Patents by Inventor Donald S. Olen

Donald S. Olen 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).

  • Oil purge system for cold weather shutdown of oil flooded screw compressor
    Patent number: 4475876
    Abstract: A system for purging the lubricating oil from the oil connecting lines (27, 31) and cooler (23) of an oil circulating system for a flooded type screw compressor (10) when the compressor (10) is shut down whereby the lubricating oil is forced into a reservoir (18) which is positioned within a heated enclosure (22) so that upon restarting the compressor (10) in extremely cold weather, cold stiff oil will not be present in the oil connecting lines (27, 31) and cooler (23), thus avoiding delays in compressor start-up.
    Type: Grant
    Filed: December 27, 1982
    Date of Patent: October 9, 1984
    Assignee: Allis-Chalmers Corporation
    Inventor: Donald S. Olen