Patents Assigned to Draf Tool Co., Inc.
  • Automatic refrigerant recovery, purification and recharge apparatus
    Patent number: 4285206
    Abstract: Automatic recovery and purification of refrigerant from air-conditioners about to be discarded or repaired is provided for. In addition, the reclaimed refrigerant with or without fresh refrigerant can be recharged to air-conditioning systems. The apparatus is particularly useful in connection with automatic reclaim and recharge of vehicular air-conditioners where the operation is to carried out at a service station at low cost by semi-skilled operators.
    Type: Grant
    Filed: February 5, 1979
    Date of Patent: August 25, 1981
    Assignee: Draf Tool Co., Inc.
    Inventor: Richard Koser