Redundant valve system

Details Redundant valve system Redundant valve system

2006-07-18

2006-07-18

Hepperle, Stephen M. (Department: 3753)

Fluid handling

Processes

C137S551000, C137S559000, C137S624120

Reexamination Certificate

active

07077148

ABSTRACT:
The redundant valve system10of the preferred embodiments includes a first valve unit12, a second valve unit14, a third valve unit16, a first diagnostic device18, a second diagnostic device20, and a control unit22. The third valve unit has a first position that allows fluid flow toward the first valve unit and a second position that allows fluid flow toward the second valve unit. The first diagnostic device and the second diagnostic device are adapted to detect the presence of a fault in the first valve unit and the second valve unit, respectively. The control unit is coupled to the third valve unit and adapted to cycle between a first operation mode that requests the first position for the third valve unit and a second operation mode that requests the second position for the third valve unit.

REFERENCES:
patent: 3951162 (1976-04-01), Wilke
patent: 4184410 (1980-01-01), Johnson
patent: 4967792 (1990-11-01), Magee

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