Valve with bi-loading seal
US7331359B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 19, 2005 |
| Grant date | Feb 19, 2008 |
| Priority date | — |
| Expiry date | Jan 25, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7613
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A fluid control valve has at its lower inlet end a bi-loading seal. The seal is generally ring shaped in top view. However, it has a first flexible load section for sealing the stationary disk with respect to the housing and a second load section having an annular insert that in cross-section is hook-shaped to form a bend of more than 90 degrees. The insert can be molded within the resilient body of the seal so that its outer rim is disposed at a circular shoulder that bears against a seal stop of the housing. A high load can thus be applied between the bearing shoulder and seal stop to achieve a tight seal, while a lower load can be applied between the flexible, unrigidified part of the seal and a stationary valve disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.