O-ring retainer for valve stem
US8770442B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2011 |
| Grant date | Jul 8, 2014 |
| Priority date | — |
| Expiry date | Jan 6, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K41/04
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An O-ring retainer is disclosed that is integral with a valve stem of a valve. The valve is intended to move in a valve chamber, which valve chamber has a fluid inlet and a fluid outlet. When manually actuated, the valve moves between a first position, where it is seated against walls of the valve chamber and prevents flow through the chamber, and a second unseated position where it allows flow of the fluid through the chamber between the inlet and the outlet. An O-ring, used in conjunction with the valve and the valve chamber, is maintained in place by an outward projection from the valve stem, which projection is located just below the normally seated O-ring. Thus, if the O-ring becomes unseated, the projection, upon movement of the valve towards the seated position, bumps the O-ring back into its normal position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.