Irrigation valve
US5104090A · kind A · utility
13Cited by
18References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1990 |
| Grant date | Apr 14, 1992 |
| Priority date | — |
| Expiry date | Jun 13, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01G25/16
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A fluid flow control valve has a resilient diaphragm that engages a valve seat. A line contact is formed between the diaphragm and the valve seat at or closely adjacent the outer diameter of the valve seat. This enhances the ability of the valve to seal under low fluid pressures. The diaphragm is reinforced by a plastic reinforcing member which is formed separately from the diaphragm. The reinforcing member and the diaphragm are inserted together in a press fit, and barbed posts on the reinforcing member hold the two together.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.