Fluid handling – With indicator – register – recorder – alarm or inspection means – Position or extent of motion indicator
Patent
1976-10-26
1978-02-21
Cline, William R.
Fluid handling
With indicator, register, recorder, alarm or inspection means
Position or extent of motion indicator
137557, 137541, F16K 3700
Patent
active
040746968
ABSTRACT:
An indicator to show that a pressure relief device has operated. The indicator of the invention comprises a flexed spring which is released to move to an upright position when the pressure relief valve is caused to operate.
REFERENCES:
patent: 2357059 (1944-09-01), Ray
patent: 2506737 (1950-05-01), Paquin
patent: 2744535 (1956-05-01), Baldwin, Jr.
patent: 3251336 (1966-05-01), O'Brien
patent: 3772624 (1973-11-01), Keogh
patent: 3828812 (1974-08-01), Read
Cline William R.
Qualitrol Corporation
Rudy Stephen J.
LandOfFree
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