Valve having improved bleed assembly
US4911401A · kind A · utility
73Cited by
7References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 15, 1989 |
| Grant date | Mar 27, 1990 |
| Priority date | — |
| Expiry date | May 15, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/5994
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An improved valve includes an inlet, an outlet and a valve seat. A flexible diaphragm assembly seals against the valve seat. A bleed assembly extends into a pressure chamber located above the diaphragm for bleeding fluid pressure out of the chamber, thereby opening the valve. The bleed assembly includes a hollow tube inserted into a plastic plunger seat that is carried on the cap of the valve beneath the plunger of an actuating solenoid. Such a bleed assembly does not need a bleed tube having a precisely controlled length, and is not sensitive to flexure of the cap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.