| 摘要 |
A flush valve for use on toilet devices such as urinals and water closets includes a body having an inlet and an outlet. There is a valve seat in the body and a valve member movable within the body toward and away from the valve seat to control water flow between the inlet and the outlet. A housing is mounted on the valve body and there i s a chamber within the housing. A piston is movable axially within the chamber and into the val ve body for contact with the valve member to cause actuation thereof. There is a spring within the chamber which normally biases the piston outwardly from the valve body. A controlled passage in the housing connects the valve body inlet and. the chamber to provide water under pressure to move the piston, against the spring, into the valve body to caus e operation of the valve member. The improvement comprises a groove in the exterior of the piston, which groove is adjacent and faces a wall of the chamber. There is a split ring in the groove, with the split ring being outwardly biased against the chamber wall and providing controlled water flow about the piston as it moves outwardly within the chamber in response t o return force from the spring.
|
