Shaft seal
US4434986A · kind A · utility
28Cited by
3References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 12, 1982 |
| Grant date | Mar 6, 1984 |
| Priority date | — |
| Expiry date | Oct 12, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S277/93
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A shaft seal has a pair of stationary, yet floating, seals which are biased into engagement with opposite sides of a mating ring carried on a rotating drive sleeve. The mating ring is maintained perpendicular to the axis of rotation and against a squaring surface of the drive sleeve. The location of a secondary seal pressure balances internal machine pressure at the primary seal at a ratio of 80:20, and provides a reverse pressure balance of greater than 100%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.