Refrigeration – Processes – Assembling – charging – or repairing of refrigeration producer
Patent
1975-02-26
1976-02-03
Wayner, William E.
Refrigeration
Processes
Assembling, charging, or repairing of refrigeration producer
62292, 29213E, F25B 4500
Patent
active
039357139
ABSTRACT:
A tool for maintaining and servicing a pressurized refrigeration system or the like wherein it is desirable to remove and replace a threaded check valve core without depressurizing the system. The tool includes a body member having a longitudinal passageway extending therethrough with means to provide sealing communication between one end of the passageway with the fitting in which the check valve is fitted. A removable cap sealingly engages the opposite end of the longitudinal passageway with an operating shaft extending therethrough for axial and rotary movement within the passageway. An annular sliding seal is disposed between the shaft and the removable cap. The shaft includes engaging means formed on one end thereof for releasably engaging the valve core to unthread and remove it from the fitting and withdraw it into the passageway to a position adjacent to the removable cap. A shut-off valve is mounted in the body member to alternately close and open the passageway when the valve core is withdrawn into the passageway adjacent to the cap. An additional port in the body member communicating with the passageway is also disclosed for evacuating or charging the refrigeration system through the passageway. Also disclosed is apparatus for use with the tool for providing initial access into a previously sealed pressurized refrigeration system through the fitting prior to installation of the threaded check valve core therein. A method for removing and replacing the valve core employing the tool is also disclosed.
REFERENCES:
patent: 3252475 (1966-05-01), Jones
patent: 3299648 (1967-01-01), White et al.
C & D Valve Manufacturing Company
Wayner William E.
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