Seismic detecting shut-down valve device

Details Seismic detecting shut-down valve device Seismic detecting shut-down valve device

1999-11-08

2001-11-06

Buiz, Michael P (Department: 3753)

Fluid handling

Control by change of position or inertia of system

C251S029000, C251S073000, C060S417000

Reexamination Certificate

active

06311714

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to a seismic detecting shut-down valve device in which a fluid path is rapidly closed by a fluid-path opening/closing valve which is moved down by air which is sent into an emergency shut-down cylinder.
There are various types of seismic detecting valve devices in which a fluid-path valve is opened when it detects earthquake which has over a certain seismic intensity, to send compressed air to an emergency shut-down valve which rapidly closes a fluid path.
The known seismic detecting shut-down valve is provided separately from a valve for opening and closing a fluid path. Thus, the structure becomes complicate and expensive, and its installation and maintenance need a lot of time and work.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a seismic detecting shut-down valve device which overcomes the foregoing disadvantage in the prior art.


REFERENCES:
patent: 4503717 (1985-03-01), Keller et al.
patent: 4852600 (1989-08-01), Asbra et al.
patent: 5595207 (1997-01-01), Jiles

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