Machined shaft seal encased in an elastomeric sleeve
US5380015A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1993 |
| Grant date | Jan 10, 1995 |
| Priority date | — |
| Expiry date | Dec 17, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/3284
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A manually assembled shaft seal assembly includes a plastic sealing element having an annular tubular mounting portion and a shaft-engaging sealing lip. An annular elastomeric sleeve extends around the inner and outer surfaces of the tubular mounting portion to provide a resilient mounting mechanism for the shaft seal assembly. During service at high operating temperatures, the elastomeric sleeve absorbs and accommodates stresses generated in the plastic tubular portion of the sealing element by thermal expansion. The elastomeric sleeve is in a compressed condition when mounted within a shaft seal housing so that it can expand slightly, if necessary, to compensate for shrinkage or creep in the plastic material, such that the seal assembly is prevented from becoming loose in the shaft seal housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.