Vacuum valve using improved diaphragm
US4717117A · kind A · utility
92Cited by
6References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 8, 1986 |
| Grant date | Jan 5, 1988 |
| Priority date | — |
| Expiry date | Dec 8, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/1262
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A valve (10) comprising a plurality of passages (22,24), and an annular sealing area (30) in communication with one of the passages. The valve also includes a diaphragm (50), movably supported relative to the sealing area (30) in response to a force differential applied thereacross; including a thin, planar, flexible, non-metallic membrane (92) for sealably engaging against the sealing area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.