Fluid seal pumping effect lip seal for rotary shaft
US4410190A · kind A · utility
8Cited by
5References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 12, 1980 |
| Grant date | Oct 18, 1983 |
| Priority date | — |
| Expiry date | Dec 12, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/3204
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A moulded seal for a fluid seal arrangement which requires no trimming of the sealing which comprises an elastomeric frusto-conical body part having a sealing lip at its inner face in spaced disposition relative to the lesser diameter end thereof. In use, the space between the sealing lip and the adjacent free end of the body is subjected to an hydrodynamic pumping action away from the lip on displacement of the shaft to reduce fluid pressure in the region of the lip and hence discourage leakage. Various seal arrangements embodying the moulded seal are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.