| 摘要 |
<p>A dual-flush flapper valve assembly (1), set for a normally short flush, is provided for use with a pivoting flapper valve (3) in a flush tank. The assembly comprises a weight (6), which moves back and forth along a guide (7) relative to the flapper's pivot point. The moveable weight (6), if activated, temporarily reduces the turning moment arm of the flapper (3) for ensuring a long flush. The assembly (1) further comprises an actuator (8, 9) to trap and release the weight (6) resulting in either a short flush (when the weight (6) is remote from the pivot) or a long flush (when the weight (6) is close to the pivot). The flapper assembly (1) is engageable through a resistance force, for selectively triggering the actuator (8, 9), shifting the weight (6) and resulting in a long flush. After a long flush the assembly (1) resets for a short flush, until activated once again.</p> |
