Measuring and testing – Fluid pressure gauge – Piston
Patent
1987-03-16
1988-09-13
Woodiel, Donald O.
Measuring and testing
Fluid pressure gauge
Piston
731468, 116272, 116335, B60C 2302, G01L 716
Patent
active
047700440
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: 376103 (1888-01-01), Mitchell
patent: 3260233 (1966-07-01), Bergunder
patent: 4244214 (1981-01-01), Curran
patent: 4526030 (1985-07-01), Vecera, Jr.
Kintzinger Warren H.
Woodiel Donald O.
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