Fluid handling – With leakage or drip collecting
Reexamination Certificate
2005-05-31
2005-05-31
Walton, George L. (Department: 3753)
Fluid handling
With leakage or drip collecting
C122S504000, C122S507000, C137S002000, C137S012000, C137S068110, C251S067000, C251S073000, C251S074000
Reexamination Certificate
active
06899122
ABSTRACT:
Safety shutoff apparatus can close a valve using a pressure operable device coupled to and acting upon the valve. The proximal end of a pressure line is coupled to the pressure operable device for applying fluid pressure thereto in order to operate the pressure operable device. A soluble plug at the distal end of the pressure line can seal it in order to maintain pressure at the pressure operable device. By placing the soluble plug next to an object that is subject to leaking, the soluble plug can dissolve when a leak occurs and release the pressure in the pressure line. The released pressure results in closure of the valve when mechanical movement is produced by the pressure operable device in response to the release of pressure.
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Adams Thomas L.
Walton George L.
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