Pneumatic valve interlock system

Details Pneumatic valve interlock system Pneumatic valve interlock system

1975-12-18

1977-07-05

Schwadron, Martin P.

Fluid handling

Systems

Valves with separate, correlated, actuators

74483R, 251 94, F16K 3514

Patent

active

040333795

ABSTRACT:
A fluid-actuated interlock system for automatically controlling a plurality of remotely located valve assemblies. A fluid switch and a locking device are disposed for cooperation with each valve operator. The fluid switches are connected to a supply line for a pressure fluid, and the locking devices are connected to a manifold. Communication is permitted between the supply line and the manifold only when one of the fluid switches is moved into an open position. Each fluid switch is maintained in a closed position by its respective valve operator in a preselected position. When one valve operator is moved away from this preselected position, the associated fluid switch is opened whereby pressure fluid flows from the supply line into the manifold which in turn supplies pressure fluid to the locking devices associated with the remaining valve operators. The locking devices are thereby actuated whereby a locking member is moved into a position preventing movement of the valve operators away from said preselected positions.

REFERENCES:
patent: 2457610 (1948-12-01), Stevens
patent: 3856037 (1974-12-01), Garrett et al.

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