| 摘要 |
A toilet holding tank water inlet valve of the type utilizing a flexible valve element formed as a portion of a pressure chamber and having a control stem associated with the pressure chamber and a pivot arm associated with the control stem is improved by molding a portion of the pressure chamber to tightly grip the control stem and attaching a vertical member to the pivot arm with a float which can move along the vertical member. An upper float stop is positioned near the uppermost end of the member and a lower float stop is positioned near the lowermost end of the member. As the float moves in response to movement of the water level within the holding tank, the float contacts the upper float stop as the tank is being filled and engages with this stop transferring the buoyant force exerted against the float by the water to the member which in turn moves the pivot arm re-positioning the control stem to effect a seal of a portion of the pressure chamber against a valve seat to inhibit further water influx into the holding tank. As the float moves downwardly with respect to the member as water is being drawn from the tank, the float contacts the lower stop and is momentarily suspended by it as the water level recedes below it. Then, the combined weights of the float, the member and the stops are transferred to the pivot arm which in turn are transferred to the control stem moving the control stem in the pressure chamber allowing the flexible valve element to unseat itself from a valve seat allowing water into the holding tank.
|
