Liquid shut-off system

Details Liquid shut-off system Liquid shut-off system

2006-06-13

2006-06-13

Walton, George L. (Department: 3753)

Fluid handling

Liquid level responsive or maintaining systems

By float controlled valve

C004S669000, C004S671000, C004S674000, C073S322500, C137S426000, C137S433000

Reexamination Certificate

active

07059342

ABSTRACT:
An automatic liquid shut-off system for a vessel and having a valve in a liquid passageway to control the level of liquid in the vessel so as to prevent an overflow of the liquid. The shut-off system comprises a conduit extending exterior from one wall of the vessel and in liquid communication therewith. A float is disposed in the conduit, and a stem extends from the float co-axially with the conduit, and is affixed to the valve to actuate the valve to a closed position. When the liquid level in the vessel rises to an undesired level, and the liquid in the vessel therefore reaches a level approximately the level of the float, the liquid acting upon the float will actuate the valve to a closed position, thereby shutting off the liquid.

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patent: 4836239 (1989-06-01), Kinkead
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