Air conditioner test gauge with pressure zone markings

Details Air conditioner test gauge with pressure zone markings Air conditioner test gauge with pressure zone markings

1988-07-22

1989-05-16

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Piston

731468, 137227, G01L 716

Patent

active

048298298

ABSTRACT:
A refrigerant system gas pressure check gauge with a valve head opening having a valve pin and shaped to fit on and over the low pressure suction side valve fitting of a refrigeration system, auto or home, with colored zones and safety markings with worded indications including safety danger warnings. The colored zones and safety markings directly match precise pressure zones on the valve stem.

REFERENCES:
patent: 1807752 (1931-06-01), Poster
patent: 2049532 (1936-08-01), Williams
patent: 3230968 (1966-01-01), Struby
patent: 4599903 (1986-07-01), Ferris
patent: 4770044 (1988-09-01), Ferris

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