Self-lubricating packing member
US4526385A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 13, 1984 |
| Grant date | Jul 2, 1985 |
| Priority date | — |
| Expiry date | Nov 13, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S277/91
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A packing member comprising an annular body having a circular groove extending axially thereinto through an end wall to form inner and outer sealing lips utilizes a resilient circular member embedded in the annular body to exert a radially directed force to a wall surface of the groove to actuate one of the sealing lips. The other sealing lip has a plurality of spaced apart circular holes extending axially there into through the first end wall of the body. In the preferred embodiment the resilient member is a hollow O-ring of elastomeric material carried in a recess formed in the inner wall surface of the groove to actuate the inner sealing lip. An annular layer of self-lubricating polymeric material is disposed over the inner wall surface to facilitate low-friction slidable contact with a separate movable member. The inner sealing lip may be left exposed to ensure proper sealing engagement with a separate movable member, or alternately, an interior annular rib is provided beneath the polymeric layer or film for such improved sealing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.