Metering valve

Details Metering valve Metering valve

1985-10-28

1987-05-05

Chambers, A. Michael

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

251 33, 251 46, F16K 31128

Patent

active

046626026

ABSTRACT:
A valve for delivering a metered flow of liquid for flushing of a plumbing fixture or the like includes inlet and outlet ports and a main valve controlling flow from the inlet to the outlet port. A control chamber is in pressure communication with the main valve and a restricted flow path from the inlet port to the control chamber increases the control pressure to hold the main valve closed in a standby condition. A pilot valve is opened by an actuator to reduce control pressure and initiate a cycle of operation of the main valve. A snap acting mechanism is movable between two stable positions for opening and closing the pilot valve. The actuator is capable of operating the snap acting mechanism for opening the pilot valve in its fully opened position closes the pilot valve regardless of the position of the actuator.

REFERENCES:
patent: 1628600 (1927-05-01), Cowley
patent: 3222996 (1965-12-01), Thieme et al.
patent: 4134570 (1979-01-01), Walker

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