Rotary shaft bearing isolator seal
US4817966A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 3, 1988 |
| Grant date | Apr 4, 1989 |
| Priority date | — |
| Expiry date | Feb 3, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C33/80
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A bearing isolator seal having a shaft seal assembly that includes a stator housing having an inner radially extending face with an annular flange of substantially frusto-conical shape that extends from a larger diameter end that is fixed to the inner radially extending face to a smaller diameter free end, and a rotor having a peripherally extending radial flange of substantially frusto-conical shape that is provided with a smaller diameter end that is fixed to a hub of the rotor, a larger diameter free end, and a contact sealing surface therebetween, the free end being biased into contact with the inner radially extending face of the stator housing and the contact sealing surface being biased into contact with the free end of the annular flange of the stator housing under static seal conditions, the rotor being constructed in a manner causing these areas of contact to be broken under the effect of centrifugal forces generated by rotation of the rotor with the shaft. In accordance with another feature of the preferred embodiments, drain ports are provided at a radially inner side of the fixed end of the annular flange of the stator housing, and radially extending V-grooves are prov…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.