Valves and valve actuation – Fluid actuated or retarded – Pilot or servo type motor
Patent
1989-05-18
1990-04-10
Walton, George L.
Valves and valve actuation
Fluid actuated or retarded
Pilot or servo type motor
4623, 137605, 137801, 222 63, 250221, 250341, 251 3005, 251 38, 251 45, 25112904, E03C 105, F16K 3102, F16K 31126
Patent
active
049153471
ABSTRACT:
A faucet has a body with a hollow inner cavity and a spout which opens into the inner cavity. A valve assembly is located within the inner cavity to control the flow of water from a source into the spout. The valve assembly comprises a housing with an inlet chamber which opens into a ring-shaped channel, an outlet chamber having an opening centrally located with respect to the ring of the channel, and a diaphragm to selectively close the communication of the inlet and outlet chambers. A solenoid includes a plunger that is biased by a spring against the diaphragm and an electromagnetic coil to pull the plunger away from the diaphragm. A proximity sensor is included to detect the presence of an object adjacent the faucet and energize the coil. A safeguard alarm mechanism is provided to deenergize the coil after a given interval if the object continues to be detected and thereafter periodically briefly energize the solenoid until the object is removed.
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Iqbal Muhammad
Kreutzer Jeffery J.
Schwartz Carl R.
Kohler Co.
Walton George L.
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