Diaphragm valves
US4221361A · kind A · utility
19Cited by
3References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 13, 1978 |
| Grant date | Sep 9, 1980 |
| Priority date | — |
| Expiry date | Feb 13, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87877
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A spring biased diaphragm valve having circular beads on the diaphragm one of which seats against and within the seat and the other surrounding the spring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.