Emergency shutoff valve

Details Emergency shutoff valve Emergency shutoff valve

2006-06-13

2006-06-13

Chambers, A. Michael (Department: 3753)

Fluid handling

Processes

Involving pressure control

C137S078500, C137S552000, C251S129110, C251S292000

Reexamination Certificate

active

07059338

ABSTRACT:
A valve control system comprises a programmable electronic controller. The programmable electronic controller is configured to provide an emergency actuation signal to a motor upon receiving an emergency close signal. The programmable electronic controller is configured to provide a test actuation signal to the motor upon receiving a test close signal. The valve control system further comprises a gas detection input configured to receive a gas detection signal. Receipt of the gas detection signal at least partially meeting a first criterion causes the emergency close signal to be supplied to the controller. The valve control system further comprises a user interface configured to provide the controller with the test close signal in response to a user input. The valve control system further comprises a low battery input configured to receive a low battery signal. Receipt of the low battery signal causes the emergency close signal to be supplied to the controller.

REFERENCES:
patent: RE32885 (1989-03-01), Graham
patent: 4973107 (1990-11-01), Graham
patent: 5092745 (1992-03-01), Graham
patent: 5154491 (1992-10-01), Graham
patent: 5255961 (1993-10-01), Graham
patent: 5361877 (1994-11-01), Graham
patent: 5393130 (1995-02-01), Graham
patent: 5588637 (1996-12-01), Carsten et al.
patent: 6267455 (2001-07-01), Graham

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