Differential pressure-actuated valve with clean bias chamber
US4596269A · kind A · utility
6Cited by
10References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 9, 1984 |
| Grant date | Jun 24, 1986 |
| Priority date | — |
| Expiry date | Mar 9, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7472
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A differential pressure-actuated valve with a piston slidable to open or to close an inlet port. The piston slides in a cylindrical wall, and separates a bias chamber and a flow chamber. The piston is fitted with two oppositely-directed lip seals, one of which seals against bias chamber pressure, and the other of which scrapes particulate matter off of the wall. Optionally, an elongated filter extends from the piston into an inlet pipe where it filters water which flows to the bias chamber. The filter may have a perforated mesh wall, or a solid wall with an open end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.