Valves and valve actuation – Fluid actuated or retarded – Pilot or servo type motor
Patent
1988-08-18
1989-05-23
Walton, George L.
Valves and valve actuation
Fluid actuated or retarded
Pilot or servo type motor
251 39, 251 46, 251 47, 251 54, F16K 31128, F16K 2116, F16K 3148, E03D 306
Patent
active
048323101
ABSTRACT:
A flush control valve (10) for metering a predetermined amount of flush fluid, or other liquid, to a facility, such as a urinal, to be flushed. The flush control valve (10) has a push button cap (166) that is actuated to cause the primary valve assembly (33) to open and distribute the flush fluid from the inlet chamber (35) of the flush control valve (10) to the outlet chamber (36) of the flush control valve (10). Depressing the push button cap (166) activates a timing assembly (109), the interior working components of which do not come in contact with the flush fluid controlled by the flush control valve (10), thereby eliminating corrosion to that critical portion of the valve (10). The timing assembly (109) is pneumatically operated and is effective through a diaphragm (108) to actuate a pilot valve assembly (83) which controls the opening and closing of the primary valve assembly (33). By virtue of the interaction between the diaphragm (108) and the stem valve element (79) in the pilot valve assembly (83) and the pressure of the flush fluid within the valve (10), and the control effected by a bleeder sub-assembly (130) in metering the flow of pneumatic fluid from a timing chamber (115) to an energizing chamber (120), the timing assemlby (109) is returned to the unactuated disposition at a rate sensitive to the pressure of the flush fluid so that a substantially constant volume of flush fluid is delivered by the flush control valve (10) over a wide range of flush fluid pressures.
REFERENCES:
patent: 729965 (1903-06-01), Schossow et al.
patent: 871859 (1907-11-01), Brooks
patent: 1123477 (1915-01-01), Brooks
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patent: 1297836 (1919-03-01), Gulick
patent: 1385456 (1921-07-01), Kellan
patent: 1812301 (1931-06-01), Nasmyth
patent: 3610280 (1971-10-01), Kitamura
patent: 4227674 (1980-10-01), Grant, Jr.
Mansfield Plumbing Products, Inc.
Walton George L.
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