Patents by Inventor David R. Griffith, Jr.

David R. Griffith, Jr. 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).

  • Portable, automatic, oil recovery system
    Patent number: 6092390
    Abstract: A compressor oil recovery device for use in removing oil from compressors typically found on condensing units used in air conditioning or refrigeration applications is disclosed. The device consists of a canister with a lid that contains a vacuum port, a suction port, a drain port, and a vacuum release port. A vacuum hose is connected at one end to the vacuum port and at the other end to an electric vacuum pump. A suction hose is connected at one end to the suction port and at the other end to the gauge manifold of a compressor. Upon activating the vacuum pump, a vacuum is created that draws the compressor oil into the canister where it is collected for disposal.
    Type: Grant
    Filed: January 2, 1998
    Date of Patent: July 25, 2000
    Inventor: David R. Griffith, Jr.