Valve
US4502452A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 26, 1983 |
| Grant date | Mar 5, 1985 |
| Priority date | — |
| Expiry date | Sep 26, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01M13/023
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A valve comprises rolling diaphragm (7) supported at its outer periphery by an annular support member (8) within which the diaphragm rolls in response to inlet pressure so as to uncover an outlet opening (20) in the support member, thereby to allow the escape of said pressure. Preferably, the diaphragm (7) is annular and is supported at its inner periphery by a guide member (9) that engages on abutment (19) when the outlet opening (20) is closed by the diaphragm, and that guides the diaphragm as it rolls back and opens the outlet opening (20). Preferably, the outlet opening (20) is of reduced width towards that part which is first uncovered by the diaphragm in operation. The valve may include a two part housing (1, 4) with the support member (8) located between the two parts and with the outer periphery of the diaphragm (7) gripped between one part of the housing (4) and the support member (8).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.