Fluid handling – Freeze condition responsive safety systems – With freeze waste
Reexamination Certificate
2005-04-26
2005-04-26
Walton, George L. (Department: 3753)
Fluid handling
Freeze condition responsive safety systems
With freeze waste
C137S061000, C137S062000, C137S301000, C137S360000, C137S539000, C137S540000, C137S614200, C138S032000
Reexamination Certificate
active
06883534
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 valve seat is located on an interior end of the valve fitting. A valve body is longitudinally movably mounted in the inlet tube adjacent to the valve fitting. A pressure relief valve is mounted on the inlet tube between the interior and exterior ends thereof so that if residual water within and adjacent the exterior end of the inlet tube freezes and exerts pressure on residual fluid within the inlet tube adjacent the interior end thereof, the pressure relief valve will actuate to purge some of the high pressure fluid to decrease the pressure being exerted by such fluid to the interior of the inlet tube.
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Almasy Lawrence
Ball William T.
Jackson Cody W.
Walton George L.
WCM Industries, Inc.
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