Patents by Inventor Daniel James O'Brien

Daniel James O'Brien 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).

  • Forced oil cooling for refrigeration compressor
    Patent number: 6145326
    Abstract: The invention is a method and apparatus for cooling compressor oil in a refrigeration system by passing the oil through a heat exchanger cooled by evaporating refrigerant. The refrigerant is pumped into the heat exchanger by a liquid refrigerant pump. The use of the pump avoids the requirement of a mixing pipe with an internal venturi nozzle, while also providing oil-cooling that is relatively free of noise and disturbance to those in the vicinity of the refrigeration unit.
    Type: Grant
    Filed: April 29, 1999
    Date of Patent: November 14, 2000
    Assignee: Systematic Refrigeration, Inc.
    Inventor: Daniel James O'Brien