Face seals with liquid pulsation pumping feature
US4799693A · kind A · utility
5Cited by
3References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 30, 1987 |
| Grant date | Jan 24, 1989 |
| Priority date | — |
| Expiry date | Apr 30, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/3416
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A face seal has a sealing ring (7) with a frusto-conical margin (12) diverging from the plane of the contact band (8), so as to define a sealing region (13) which enlarges toward the sealed side "S," and a peripheral shoulder (14) which has a non-constant axial clearance from the counter-face to produce liquid pulsation which slightly reciprocates the sealing ring to effect, by displacement pumping, positive action toward the sealed side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.