Fluid handling – Systems – Flow path with serial valves and/or closures
Patent
1977-06-13
1980-01-08
Schwadron, Martin P.
Fluid handling
Systems
Flow path with serial valves and/or closures
137231, 13761402, 13761403, 62292, F16L 3722
Patent
active
041823702
ABSTRACT:
An improved air conditioning charging apparatus includes a plug which is connected with the air conditioning system. The plug is provided with a valve of the automotive tire or Dill type to prevent leakage of refrigerant fluid from the air conditioning system. To further prevent leakage of refrigerant fluid from the air conditioning system, the threaded outer end portion of the plug is capped. When the air conditioning system is to be charged with refrigerant fluid, the cap is removed and a socket assembly which is connected to a source of refrigerant fluid under pressure is connected with the plug. To provide a secure connection between the socket assembly and the plug, an external groove is formed in the plug and is engaged by locking balls on the socket assembly. This external groove is disposed inwardly of the threaded outer end portion of the plug.
REFERENCES:
patent: 1534862 (1925-04-01), Myers
patent: 2632462 (1953-03-01), Selwyn
patent: 2837350 (1958-06-01), Druge
patent: 3424181 (1969-01-01), Morse
patent: 3538961 (1970-11-01), Bruce
patent: 3777782 (1973-12-01), Schendure
patent: 3916642 (1975-11-01), Mullins
patent: 3935713 (1976-02-01), Olson
patent: 3976110 (1976-08-01), White
Chambers A. Michael
Schwadron Martin P.
The Hansen Manufacturing Company
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