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US 4,904,830 AGranted
Liquid shut-off system
OwnerAnthony B. Rizzutoinventor
Life of this patent
Estimating the term…
Abstract
The System is designed to shut-off the flow of liquid in a conduit, unattended, i.e., automatically, in the event of a liquid conduit rupture, liquid overflow, or the like. A float which carries a mercury switch is set over a recess formed therefor and into which liquid can flow and collect. The float rises with the collected liquid, and the mercury switch activates a solenoid valve which is interpositioned in a pressured-liquid conduit, to halt the flow of liquid through the conduit. The recess is formed in a lowermost portion of an area in which the subject conduit is sited.
Claims3
For use in a liquid shut-off system, a float switch, comprising:
- a shell;
- a pivot pin fixed in said shell and in traverse thereof;
- a sleeve rotatably encompassing an intermediate portion of said pin;
- a buoyant element coupled at one end thereof to said sleeve;
- a liquid switch carried by said element;
- and
- electrical lines, coupled at first ends thereof, to said switch;
- wherein
- said shell has an unapertured top, and a continuous wall depending from said top;
- and
- said wall has only (a) a pair of apertures in which said pin is fixed, and (b) a third aperture through which said electrical lines pass.
8 more elements
Dependencies are inferred from the claim text.