| 摘要 |
<p>PCT No. PCT/AU84/00232 Sec. 371 Date Jul. 12, 1985 Sec. 102(e) Date Jul. 12, 1985 PCT Filed Nov. 9, 1984 PCT Pub. No. WO85/02241 PCT Pub. Date May 23, 1985.A silencer attached to a toilet cistern float valve or the like includes damping elements disposed between two cavities with ports communicating between the two cavities. A cylinder beneath a lower one of the two cavities communicates therewith through an apertured partition wall while the lower cavity includes a water outlet disposed at a level above that of the ports leading to the lower cavity to eliminate any air gap during refilling of the cistern. After refilling, water in the lower cavity drains through the apertured partition wall into the cylinder, the latter of which includes a bottom opening providing a siphon-breaking air gap.</p> |
