Flush valve
US3936028A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1973 |
| Grant date | Feb 3, 1976 |
| Priority date | — |
| Expiry date | Jul 13, 1993 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/385
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In one embodiment, a valve body contains a flexible valve sleeve between a fluid inlet and a fluid outlet, and an annular chamber around the sleeve connects with the inlet so that fluid pressure in the chamber normally compresses the sleeve to a closed position. A manually operated pilot valve reduces pressure in the chamber so that the sleeve is expanded by fluid pressure from the inlet to open the valve. In another embodiment, a valve body contains a flexible diaphragm which normally closes an inlet valve port and defines a pressure chamber isolated from a fluid outlet. A manually operated pilot valve reduces pressure in the chamber so that the diaphragm is unseated from the inlet port by fluid pressure from the inlet to open the valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.