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Title: Valve system incorporating single failure protection logic

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.

Inventors:
 [1];  [2]
  1. (San Jose, CA)
  2. (Saratoga, CA)
Issue Date:
OSTI Identifier:
863489
Patent Number(s):
4184514
Assignee:
United States of America as represented by United States (Washington, DC) OSTI
DOE Contract Number:  
E(11-1)-2395
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
valve; incorporating; single; failure; protection; logic; protective; consists; combination; composite; allows; actuation; de-actuation; device; hydraulic; cylinder; mechanism; integral; separate; assembly; means; independent; input; signals; combined; function; commonly; two-out-of-three; redundant; signal; corresponding; set; neither; prevent; desired; action; nor; undesired; input signals; input signal; valve assembly; single failure; hydraulic cylinder; incorporating single; /137/91/376/976/

Citation Formats

Ryan, Rodger, and Timmerman, Walter J. H. Valve system incorporating single failure protection logic. United States: N. p., 1980. Web.
Ryan, Rodger, & Timmerman, Walter J. H. Valve system incorporating single failure protection logic. United States.
Ryan, Rodger, and Timmerman, Walter J. H. Tue . "Valve system incorporating single failure protection logic". United States. https://www.osti.gov/servlets/purl/863489.
@article{osti_863489,
title = {Valve system incorporating single failure protection logic},
author = {Ryan, Rodger and Timmerman, Walter J. H.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {1}
}

Patent:

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