Rotary fluid seals with floating sealing rings
US4348031A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 9, 1981 |
| Grant date | Sep 7, 1982 |
| Priority date | — |
| Expiry date | Mar 9, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/3456
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A rotary fluid seal, especially an oil seal for a rotary shaft, comprises a sealing ring between axially-opposed divergent frusto-conical counterfaces of relatively rotatable members, preferably casing rings in a self-contained seal unit, the sealing ring having a pair of divergent sealing lips presenting frusto-conical contact faces to the counterfaces and being substantially coaxial with but floating freely between the relatively rotatable members, the contact faces bearing frictionally on the counterfaces so that, on relative rotation of the members, the sealing ring is frictionally driven into rotation by one or other of the members and the effect of centrifugal force, tending to cause the sealing lips to flex angularly outwardly, reduces the bearing load of the contact faces on the counterfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.