Baths – closets – sinks – and spittoons – Flush closet – Manual selection of the amount of flush
Patent
1979-10-18
1981-12-15
Levy, Stuart S.
Baths, closets, sinks, and spittoons
Flush closet
Manual selection of the amount of flush
4379, 4383, 4394, 4405, E03D 100, E03D 114, E03D 134
Patent
active
043051634
ABSTRACT:
A flush valve mechanism for controlling the flushing action of water thro the water outlet of a flush cistern is provided. The mechanism comprises a water outlet valve liftable off the water outlet to effect the flushing action and a buoyant, valve-engaging assembly adapted to move independently of the water outlet valve by virtue of its buoyancy. The water outlet valve having an effectively negative overall buoyancy when the cistern is at least partially full. The valve-engaging assembly comprises a pivotably mounted buoyant lever having at least one arm with a buoyant means attached at one end thereof adjacent the bottom of the cistern and is provided with means at its other end for selectively engaging the valve. The assembly further comprises restraining means having a first position normally engaging and restraining the buoyant lever with the buoyant means in close proximity to the cistern bottom and the engaging means in disengaged relationship to the valve. The restraining means are displaceable to assume a second position freeing the buoyant lever and allowing the same to engage and to exert a maintaining force on the water outlet valve at the completion of the lifting thereof to overcome its negative buoyancy and to hold it open until the completion of the flushing action.
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Ben-Gurion University of the Negev Research and Development Auth
Levy Stuart S.
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