Rotary seal and/or bearing
US6210103A · kind A · utility
52Cited by
19References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 31, 1998 |
| Grant date | Apr 3, 2001 |
| Priority date | — |
| Expiry date | Mar 31, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/406
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
For an impeller pump, the seal/bearing unit has two rotor-stator pairs of tapered sleeves arranged back-to-back. The sleeves have a spiral groove, and convey barrier-liquid from an entry-mouth in an entry-chamber to an exit-mouth in an exit-chamber. Having two sleeves gives the units mechanical stability, thrust support capability, and resistence to vibrations and other abuses. The tapered sleeves may be arranged wide-narrow-wide, or narrow-wide-narrow. The sleeves may be mounted for sliding in the housing and on the shaft, or may be fixed to the housing or shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.