Device for sealing between preferably movable parts
US3930657A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1973 |
| Grant date | Jan 6, 1976 |
| Priority date | — |
| Expiry date | Jul 31, 1993 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S277/946
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A device for producing a seal between movable and/or stationary parts, such as a piston and a cylinder particularly under conditions of high fluid pressures, comprises a sealing ring having an O-ring configuration and fabricated of a material such as rubber. A support ring is disposed on at least one side of the sealing ring in coaxial relation thereto, the support ring being fabricated of a thermoplastic polymer material having a hardness greater than the sealing ring and being formed with a concavely curved contact surface facing and engaging the sealing ring. A guide ring having an L-shaped cross section is disposed outside of the support ring relative to the sealing ring in coaxial relation to the sealing and support rings, and consists of a polymer material having a hardness greater than the thermoplastic polymer of the support ring. The guide ring includes a side surface in planar engagement with a planar contact surface formed on the support ring on the side thereof opposite to the concavely curved contact surface, the engaged planar surfaces having substantially the same dimensions in a radial direction, and the said guide ring also defines a peripheral sliding surface exte…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.