| 摘要 |
<p>This invention provides a pressure assisted valve (1) for filling toilet cisterns. The 5 valve (1) has a chamber (6) with an inlet (3) and an annular outlet (4) around the inlet. A diaphragm closure member (12) is located over the inlet (3) and outlet (4) with its upper surface exposed to the chamber (6). Located through the diaphragm (12) is an axially movable pintle (19) and a chamber vent opening (16) from the chamber (6) is closable by an enlarged upper end (20) of the pintle (19). 10 The pintle (19) is has longitudinal ribs on its outer surface to provide a bleed passage (29) past the diaphragm (12). The lower end of the pintle (19) is supported in a perforated guide (27) in the inlet (3) which is resiliently biased to close the enlarged end (20) of the pintle (19) against the chamber vent opening (16). A control spindle (21) extends through the chamber vent opening (16) from 15 the enlarged end (20) of the pintle (19). A manipulating mechanism (25) acts on the spindle (2) to move the pintle (19) to open the chamber vent opening (16). The valve (1) makes use of differential surfaces on the diaphragm (12) to control the flow of water from the inlet (3) to the outlet (4).</p> |
