Shock damping device for flush valve mechanism
US5396665A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 1, 1993 |
| Grant date | Mar 14, 1995 |
| Priority date | — |
| Expiry date | Sep 1, 2013 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE03D1/144
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A flush valve mechanism for controlling the flushing action of water through the water outlet of a flush cistern, comprising, in combination: (a) a water outlet valve to effect the flushing action; (b) a buoyant device, at least indirectly engaging the outlet valve, to exert a maintaining force thereon at the completion of the lifting thereof and to hold it open while the cistern is emptying and until the completion of a predetermined flushing action; and (c) a shock damping device attachable to the outlet valve and, comprising an inverted cup-shaped member and a body member, the body member being configured to freely move within the inner surface of the cup, the cup-shaped member and the body member defining therebetween a changeable volume of substantially surrounded space and having restricted openings for the passage of water into and out of the space, whereby upon attachment of the device to the valve, any vertical movement of the water outlet valve will also be affected by the device, whereby, upon the emptying of the cistern to a predetermined level below the buoyant means and the consequent completion of the exertion of the maintaining force on the water outlet valve by the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.