Extended stroke valve and diaphragm
US7063304B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 8, 2004 |
| Grant date | Jun 20, 2006 |
| Priority date | — |
| Expiry date | Jul 8, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K7/17
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An extended stroke poppet valve particularly suited for handling caustic fluids and having features enabling an extended service life for the valve. The valve includes a two part primary diaphragm assembly with a wetted diaphragm made from highly fatigue resistant fluoropolymer material, and a diaphragm backer made from high strength fluoropolymer material designed to withstand the high stress loads imposed by an extended valve stroke. The combination of these two layers in a single primary diaphragm assembly yields a highly durable, caustic chemical resistant, diaphragm capable of use in a long stroke poppet valve and having a relatively long service life.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.