Springless diaphragm valve
US4244554A · kind A · utility
41Cited by
6References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1979 |
| Grant date | Jan 13, 1981 |
| Priority date | — |
| Expiry date | Apr 2, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/385
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A valve having a flexible diaphragm for opening and closing the valve. The diaphragm is biased into valve-closing position by a ridge, formed in the valve body, which presses the diaphragm toward the valve seat. A rigid backup washer is secured to the diaphragm solely by an elastomeric type adhesive. A bleed hole in the diaphragm establishes communication between the valve inlet port and a chamber on the side of the diaphragm opposite the valve seat. The bleed hole is in the margin of the diaphragm which is sandwiched between two portions of the valve body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.