Automatic toilet flushing device

Claim 1

An automatic flushing device for toilets having a flush valve operable for releasing water from a flush tank to a toilet bowl provided with a seat hinged upon the bowl for pivotal movement around a horizontal axis at the rearward end of the seat, said device comprising, in operative combination: a. an elongated arm secured to said seat and extending rearwardly underneath said flush tank; b. means for reciprocating pivotal movements of said seat, and transmitted through said arm, along a vertical axis; c. means for spring biasing said means for reciprocating pivotal movements of said seat so as to urge said arm slightly downwardly thereby lifting said seat slightly from said bowl; d. floating means for actuating said flush valve within predetermined water levels in said tank; e. tripping means disposed so as to prevent said floating means from actuating said flush valve and responsive to the relative positions of said means for reciprocating for triggering its tripping function and wherein said tripping means includes an actuating link having a cam termination in cooperation with said means for reciprocating the pivotal movements of said seat and a shoe member hingedly connected to said actuating link and adapted to prevent the actuation of said flush valve by said floating means until said tripping means is actuated.