Valve system incorporating single failure protection logic

Details Valve system incorporating single failure protection logic Valve system incorporating single failure protection logic

1978-01-11

1980-01-22

Michalsky, Gerald A.

Fluid handling

Systems

With flow control means for branched passages

91 48, 137885, 176 24, G21C 1700

Patent

active

041845145

ABSTRACT:
A valve system incorporating single failure protective logic. The system consists of a valve combination or composite valve which allows actuation or de-actuation of a device such as a hydraulic cylinder or other mechanism, integral with or separate from the valve assembly, by means of three independent input signals combined in a function commonly known as two-out-of-three logic. Using the input signals as independent and redundant actuation/de-actuation signals, a single signal failure, or failure of the corresponding valve or valve set, will neither prevent the desired action, nor cause the undesired action of the mechanism.

REFERENCES:
patent: 3223590 (1965-12-01), Troeger

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