Dispensing tool assembly for charging a refrigerant or other flu

Details Dispensing tool assembly for charging a refrigerant or other flu Dispensing tool assembly for charging a refrigerant or other flu

1989-02-21

1989-12-26

Tapolcai, William E.

Fluid handling

Processes

251 58, 251148, 285 18, 285319, E03B 104

Patent

active

048891495

ABSTRACT:
A tubular body supports a fluid actuated tubular piston connected to operate a coupling mechanism for releasably securing the body to a valve or inlet fitting on a refrigerant or coolant receiving system. The body encloses components which define a center passage connected to the fitting for first evacuating air from the system and then for directing liquid refrigerant or coolant into the system. In one embodiment, the passage receives an elongated valve opening member which is fluid actuated to a position opening the valve fitting, and a movable valve member closes the passage to the flow of refrigerant. The fluid actuated coupling mechanism provides for convenient and simple insertion of the tool assembly onto the fitting with no insertion force and also for automatic release of the tool assembly from the fitting after charging is completed. A fluid actuated valve member minimizes the loss of coolant or the volume of residue refrigerant which vaporizes when the tool assembly is removed from the fitting. When a coolant system is charged, the overflow container is also automatically filled.

REFERENCES:
patent: 2462642 (1949-02-01), Jacobson et al.
patent: 2887124 (1959-04-01), Mehl
patent: 3538961 (1970-11-01), Bruce
patent: 3976110 (1976-08-01), White
patent: 4032041 (1977-06-01), Bruce
patent: 4561264 (1985-08-01), Johanson
patent: 4708175 (1987-01-01), Janashak et al.

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