Valve system incorporating single failure protection logic

Patent · Tue Jan 22 00:00:00 EST 1980

OSTI ID:7147641

Ryan, R; Timmerman, W J.H.

A valve system is described 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. 3 figs.

• Assignee: Dept. of Energy, Washington, DC (United States)
• Patent Number(s): US 4184514; A
• Application Number: PPN: US 5-868634
• OSTI ID: 7147641
• Resource Relation: Patent File Date: 11 Jan 1978
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
ACTUATORS
LOGIC CIRCUITS
VALVES
FAILURES
SAFETY ENGINEERING
CONTROL EQUIPMENT
ELECTRONIC CIRCUITS
ENGINEERING
EQUIPMENT
FLOW REGULATORS
420000* - Engineering