Pressure control for earthquake sensitive shut-off valve

Details Pressure control for earthquake sensitive shut-off valve Pressure control for earthquake sensitive shut-off valve

1988-05-31

1989-12-26

Nilson, Robert G.

Fluid handling

Control by change of position or inertia of system

With second control

137460, 137461, E16K 1736, E16K 1722

Patent

active

048891509

ABSTRACT:
A pressure control for a shut-off valve, preferably an earthquake sensitive shut-off valve, and a control for closing the valve in response to regulated pressure failure in the pressure supply of gas or the like thereto, and including a meter means or the like upstream, the control sensing pressures both upstream and downstream for its operation, for protecting downstream appliances and apparatus.

REFERENCES:
patent: 820598 (1906-05-01), Petersen
patent: 2749926 (1956-06-01), Dillman
patent: 3575204 (1971-04-01), McMurry
patent: 3747616 (1973-07-01), Lloyd
patent: 4120316 (1978-10-01), Robinson
patent: 4278102 (1981-07-01), Kelley
patent: 4715394 (1987-12-01), O'Donnell et al.

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