Dual flush mechanism

Details Dual flush mechanism Dual flush mechanism

1989-03-20

1989-11-21

Artis, Henry K.

Baths, closets, sinks, and spittoons

Flush closet

Manual selection of the amount of flush

4325, 4249, 4378, 4405, 4415, E03D 114, E03D 312

Patent

active

048812790

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 partial-flush 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 lever extension, thereby keeping the flush valve in an unseated position. As the tank water lever lowers, a partial-flush float also lowers, pulling down the end of a lever which pivots so as to linearly retract the lever extension from engagement with the partial-flush control arm. This permits the control arm to drop, reseating the flush valve. With the refilling of the tank, the partial-flush float rises, forcing the lever, by means of a rigid connecting member, to rotate so as to cause the pivotally attached lever extension to move into pressurized contact against the control arm in preparation for the next partial-flush cycle.

REFERENCES:
patent: 2532977 (1950-12-01), White
patent: 2922168 (1960-01-01), Crandall
patent: 3787902 (1974-01-01), McCombs
patent: 4175296 (1979-11-01), Goldman
patent: 4406024 (1983-09-01), Chiu et al.
patent: 4750220 (1988-06-01), Baumann

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