Patents by Inventor David C. Squires

David C. Squires 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).

  • Adapter plate for refrigeration system servicing
    Patent number: 5222377
    Abstract: An adapter plate for mounting to the outlet side of a refrigeration system compressor including one or two fittings for retrieving refrigerant from the cooling system prior to servicing so as to avoid discharge of the refrigerant gas into the atmosphere. The adapter plate provides a larger fitting than typically provided in refrigerant systems, thereby enabling the retrieval process to be accomplished in a shorter amount of time.
    Type: Grant
    Filed: August 3, 1992
    Date of Patent: June 29, 1993
    Assignee: Squires Enterprises, Inc.
    Inventor: David C. Squires
  • Method and apparatus for passive refrigerant and storage
    Patent number: 5214927
    Abstract: A passive refrigerant retrieval and storage apparatus is shown for retrieving refrigerant from a cooling system prior to servicing the cooling system. The passive apparatus includes a coil collector tube within an insulated housing with an outlet from the collector tube passing through a metering valve into the housing. The collector tube is connected to the condenser outlet of a cooling system and the system compressor operated to pump pressurized liquid refrigerant into the collector tube. A small portion of the refrigerant is discharged through the metering valve into the apparatus housing where it is evaporated and causes extreme subcooling to the refrigerant in the collector tube. A return line from the housing to the inlet side of the compressor returns the evaporated refrigerant to the cooling system.
    Type: Grant
    Filed: March 13, 1992
    Date of Patent: June 1, 1993
    Inventor: David C. Squires
  • Apparatus for passive refrigerant retrieval and storage
    Patent number: 5088291
    Abstract: A passive refrigerant retrieval and storage apparatus is shown for retrieving refrigerant from a cooling system prior to servicing the cooling system. The passive apparatus includes a coil collector tube within an insulated housing with an outlet from the collector tube passing through a metering valve into the housing. The collector tube is connected to the condenser outlet of a cooling system and the system compressor operated to pump pressurized liquid refrigerant into the collector tube. A small portion of the refrigerant is discharged through the metering valve into the apparatus housing where it is evaporated and causes extreme subcooling to the refrigerant in the collector tube. A return line from the housing to the inlet side of the compressor returns the evaporated refrigerant to the cooling system.
    Type: Grant
    Filed: January 18, 1991
    Date of Patent: February 18, 1992
    Assignee: Squires Enterprises
    Inventor: David C. Squires