Restrained elastomeric seal ring means
US3990711A · kind A · utility
Inventor
Key dates
| Filing date | May 9, 1975 |
| Grant date | Nov 9, 1976 |
| Priority date | — |
| Expiry date | May 9, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S277/91
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An elastomeric sealing system for sealing between two metal plates in contact along a contact plane and simultaneously sealing between a bored opening through the plates perpendicular to the contact plane, and a cylindrical piston in the bored opening. The system provides a recess positioned at the contact plane into which an elastomeric seal ring is positioned. Contrary to the conventional type of O-ring seal, the recess may contain two or even three portions and the seal ring correspondingly will have two or three parts adapted to fit into the two or three portions of the recess. The purpose of the second and/or third portions of the ring is to prevent the seal ring from moving radially inwardly and out of the recess when the piston is removed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.