Freeze protection device for wall hydrants/faucets

Details Freeze protection device for wall hydrants/faucets Freeze protection device for wall hydrants/faucets

2005-02-22

2005-02-22

Walton, George L. (Department: 3753)

Fluid handling

Freeze condition responsive safety systems

With freeze waste

C137S061000, C137S062000, C137S301000, C137S360000, C137S533110, C137S614180, C137S614200, C138S032000

Reexamination Certificate

active

06857442

ABSTRACT:
A freezeless wall hydrant has a normally horizontal fluid inlet tube with an interior end and exterior end. A hollow valve fitting is rigidly secured to the interior end of the inlet tube for a connection to a source of pressurized fluid. A movable ball is located with a fluid conduit that extends from the interior of the inlet tube to the location of the potable water source. When the water pressure inside the inlet tube increases because of the presence of ice, the high pressure of such water moves the ball to open fluid flow of the high pressure fluid to the source of potable water which will be at a lower pressure, thus reducing the fluid pressure within the inlet tube and saving it from rupture.

REFERENCES:
patent: 3913602 (1975-10-01), Yoon
patent: 4182356 (1980-01-01), Woodford, Sr.
patent: 5392805 (1995-02-01), Chrysler
patent: 5740831 (1998-04-01), DeNardo et al.
patent: 6142172 (2000-11-01), Shuler et al.
patent: 6532986 (2003-03-01), Dickey et al.

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