Seal/bearing assembly
US5827042A · kind A · utility
39Cited by
30References
49Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 19, 1996 |
| Grant date | Oct 27, 1998 |
| Priority date | — |
| Expiry date | Dec 19, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2240/42
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
For fitment into the stuffing box of a centrifugal pump. A spiral-groove is cut on the outer surface of the rotor of a pair of tapered bearing surfaces. The groove is 0.02 mm deep, 2 mm wide, and its circumferential length is 50 cm. Barrier-liquid is fed to an entry-mouth of the spiral-groove, and groove generates a pressure in the stuffing box high enough to overcome process pressure. The barrier-liquid may be water. The interface between the bearing surfaces is sealed from the process-fluid and from the outside.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.