Seal assembly
US4577874A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 16, 1985 |
| Grant date | Mar 25, 1986 |
| Priority date | — |
| Expiry date | Jul 16, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S277/909
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A two element, high and low pressure seal assembly to be used in a hydraulic or pneumatic sealing environment between two relatively movable machine parts, the seal assembly comprising a spring element, circular or rectangular in cross-section and made of a relatively soft elastomeric material, and spring element being substantially contiguously surrounded along all but a small exposed area and contained within an annular slot of a house-shaped elastomeric annular sealing member whereby an integral assembly is formed for easy installation and unitary response. The house-shaped sealing element comprises a central body from which two anti-extrusion legs radially extend. The legs are located fore and aft of the spring element within an annular peripheral groove in one machine part and are disposed perpendicular or radial to the axis of said machine part. Projecting radially beyond said machine part is a convergingly tapered gabled surface defining a central apex or tip portion, said tip portion creating a narrow band contact dynamic seal area between the apex per se and the second machine part when the seal assembly is in said machine part groove and compressed between the two machine…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.