Baths – closets – sinks – and spittoons – Flush closet – Manual selection of the amount of flush
Patent
1988-03-25
1989-06-13
Roberts, Edward L.
Baths, closets, sinks, and spittoons
Flush closet
Manual selection of the amount of flush
4415, E03D 114
Patent
active
048378674
ABSTRACT:
A dual flush system for toilets to effect a partial or mini-flush of the toilet to carry away liquid wastes by partially opening of the main valve situated in the water holding tank of the toilet or a period of time determined by an operator. So long as the main valve is only opened slightly, downward pressure upon the main valve and suction forces of water passing between the main valve and valve seat exert a downward force on the main valve with the effect that the main valve is pulled back into a closed position after opening. Only when the main valve is raised to a position where its buoyancy exceeds downward pressures is a full flush effected. Accordingly, the described device provides means to limit the upward lifting of the main valve by limiting the lengthwise travel of a cord attached to the main valve, the cord having attached at its other end variously a pull ring or flush handle and lever. Lengthwise travel of the cord is terminated by a stop attached to the cord which strikes an outstanding arm attached to the toilet overflow pipe. An additional embodiment utilizes a spring mechanism to increase resistance at a set point to the main flush handle movement to indicate that point at which a partial flush continues into a complete flush.
REFERENCES:
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patent: 4353138 (1982-10-01), Bell
patent: 4750220 (1988-06-01), Baumann
McClanahan J. Michael
Roberts Edward L.
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