Piston for reverse flow diaphragm valve
US7475863B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 14, 2005 |
| Grant date | Jan 13, 2009 |
| Priority date | — |
| Expiry date | Nov 1, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/402
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An improved, reverse-flow diaphragm valve assembly having a valve member encased within a valve housing including a base portion, having inlet and outlet ports, and a bonnet. The valve member is carried by a resilient diaphragm in a pressure chamber. In a preferred form, a solenoid actuated valve can command the movement of the valve member between closed position and open positions. A hand settable control piston and spring manage forces on the diaphragm, allowing the user to set the pressure drop across the valve. The control piston has an enlarged portion, preferably a flared flange, for providing support for the resilient diaphragm to help prevent wear and damage so to prolong the life of the diaphragm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.