Pressure-balanced packing
US4172599A · kind A · utility
21Cited by
9References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 8, 1977 |
| Grant date | Oct 30, 1979 |
| Priority date | — |
| Expiry date | Sep 8, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/3204
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A packing ring comprises a stiffening ring having an angular profile and an angularly profiled sealing element fastened thereon composed of an elastomeric material and having the configuration of a two-armed lever. The sealing element comprises a membrane portion forming one arm, a sealing lip on the other arm and an annular portion fastened by the membrane to the annular portion of the stiffening ring. The radial portion of the stiffening ring and the membrane portion define a cavity therebetween and a fulcrum axis is provided centrally of the two arms to pivot the sealing lip into contact with the surface to be sealed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.