Patents by Inventor Mark D. Pfleeger

Mark D. Pfleeger 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).

  • Background tank fill
    Patent number: 6134896
    Abstract: A refrigerant servicing system includes a main supply tank of refrigerant and an auxiliary tank which is coupled to the main tank by a valve which is selectively controlled by a circuit also coupled to weight and pressure sensors to assure the main tank has a level of refrigerant adequate for providing a continuous supply of refrigerant during servicing.
    Type: Grant
    Filed: March 19, 1999
    Date of Patent: October 24, 2000
    Assignee: SPX Corporation
    Inventors: William C. Brown, Walter D. Murray, Gary P. Murray, Mark D. Pfleeger