Dual toilet flushing system

Claim 1

A dual toilet flushing system for a water tank having a bottom, a top, a side having a bore formed therethrough in the area of the top, a water dump hole in the bottom of the water tank, a toilet, a water pipe from the water dump hole in the bottom of the water tank to the toilet and a handle member rotatably mounted in the bore through the side of the tank, said dual toilet flushing system comprising a shaft rotatably mounted in the water tank in the area of the top thereof and extending transversely across the tank and across the water dump hole; a first roller affixed to the shaft over the water dump hole and rotatable with said shaft; a hydraulic actuator having a housing in the tank, a control shaft extending through the housing and having spaced opposite first and second ends extending beyond the housing and a coil spring coaxially positioned around the control shaft in the housing and moving the control shaft downward toward the water dump hole after said control shaft is moved upward; a second roller affixed to the handle in the tank and rotatable therewith, said second roller having a pair of spaced indentations formed in its rim; a detent ball mounted at the rim of the second roller in the tank; a detent spring urging the detent ball radially toward the axis of the second roller; a chain wound on the second roller and extending over the first roller, said chain having a free end affixed to the first end of the control shaft whereby said control shaft hangs substantially vertically over the water dump hole; and a dump plug affixed to the second end of the control shaft whereby when the handle is turned until the detent ball is moved by the detent spring into a first of the indentations in the rim of the second roller, the control shaft is moved upward a first predetermined amount and moves the dump plug a first predetermined distance above the water dump hole whereby the spring of the hydraulic actuator moves the control shaft downward to close the water dump hole with the dump plug after the lapse of a first period of time thereby providing a first predetermined volume of flushing water through the water pipe during said first period of time, and when said handle is turned until said detent ball is moved by said detent spring into the second of the indentations in the rim of said second roller, said control shaft is moved upward a second predetermined amount and moves said dump plug a second predetermined distance above said water dump hole greater than said first predetermined distance whereby the spring of said hydraulic actuator moves said control shaft downward to close said water dump hole with said dump plug after the lapse of a second period of time longer than said first period of time thereby providing a second predetermined volume of flushing water greater than said first predetermined volume of flushing water through said water pipe during said second period of time.