Patent ID: 7487950

Claim:
A flush valve for a plumbing fixture, said flush valve comprising; a housing having a longitudinal axis, an inlet, an outlet and a main valve seat between said inlet and said outlet, said main valve seat being oriented transverse to said axis; a main valve assembly including a main valve member movable in the axial direction relative to said main valve seat; a control chamber at a first side of said main valve member and communicating with said inlet for normally holding said main valve member against said main valve seat; said main valve assembly including a guide tube extending axially from a second side of said main valve member; said main valve assembly including a pilot valve seat; a pilot valve member movable relative to said pilot valve seat, the pilot valve member having a central upper portion; a stem extending axially from said pilot valve member; an actuator at a first side of said axis engageable with said stem for tilting said pilot valve by laterally moving said stem; a central abutment configured with a rotator configuration for engaging the central upper portion of the pilot valve member; said housing including a support abutment engaging said guide tube at a second side of said axis opposite to said first side of said axis for opposing the tilting force applied by said pilot valve to said main valve assembly during said lateral movement of said stem; wherein, when the central upper portion of the pilot valve member engages the central abutment upon opening of the main valve assembly, the pilot valve is incrementally rotated.