Fluid handling – Back flow prevention by vacuum breaking – Air vent in liquid flow line
Patent
1991-02-11
1992-04-14
Michalsky, Gerald A.
Fluid handling
Back flow prevention by vacuum breaking
Air vent in liquid flow line
137217, F16K 2400, E03C 110
Patent
active
051038560
ABSTRACT:
A faucet with a pull-out spray head includes a mixing valve for combining water from hot and cold supply lines. Water from the mixing valve flows through a check valve assembly having a chamber with an inlet, connected to the mixing valve, and an outlet, that is connected to the spray head. Separate check valves are located in the inlet and the outlet to restrict water flow through the check valve assembly to only the direction from the inlet to the outlet. A hose connects the intermediate chamber of the check valve mechanism to a vacuum breaker adapted to mount next to the faucet. The vacuum breaker includes a housing with an internal cavity into which the conduit communicates. An aperture in the vacuum breaker housing provides a passage between the cavity and the ambient environment of the faucet. Located within the chamber of the vacuum breaker assembly is a float which seals the aperture when pressure within the intermediate chamber of the check valve assembly is significantly greater than the atmospheric pressure of the ambient environment of the faucet. The aperture is opened when the intermediate chamber pressure is less than the atmospheric pressure.
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Page from a catalog which illustrates a faucet design designated K-15176 and K-15173 (undated).
Page from a catalog showing Harden faucet assemblies (undated).
Page from a catalog showing a faucet assembly with a pull-out spray head (undated).
Kohler Co.
Michalsky Gerald A.
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