Dual flush mechanism

Details Dual flush mechanism Dual flush mechanism

1988-01-27

1988-08-23

Phillips, Charles E.

Baths, closets, sinks, and spittoons

Flush closet

Manual selection of the amount of flush

4382, E03D 312

Patent

active

047649950

ABSTRACT:
A dual flush mechanism which allows the user to select either a full or partial flush, while using a single flush valve. A full flush is obtained by a first handle which lifts a flush valve actuating arm to unseat the flush valve in a conventional manner. For a partial flush, a second handle rotates and lifts a partial-flush control arm which extends beneath the flush valve actuating arm. Upward movement of the control arm is limited. Release of the second handle permits the control arm to rotate downwards until stopped by the engagement of a portion of the control arm with a transversely extending rack extension, thereby keeping the flush valve in an unseated position. As the tank water level lowers, a partial-flush float also lowers, pulling down the end of a lever which pivots with an attached pinion gear, toothed with a rack to linearly retract a rack extension from engagement with the control arm. This permits the control arm to drop, reseating the flush valve. With the refilling of the tank, the partial-flush float rises, permitting the lever, assisted by a counterweight, to rotate with its pinion gear so as to cause the rack extension to move into pressured contact against the control arm in preparation for the next partial-flush cycle.

REFERENCES:
patent: 519337 (1894-05-01), Moloney
patent: 3091775 (1963-06-01), Himmelrick
patent: 4175296 (1979-11-01), Goldman
patent: 4530119 (1985-07-01), Chiu et al.

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