Centrifugal pump having improvements in seal life
US4773823A · kind A · utility
22Cited by
15References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 28, 1986 |
| Grant date | Sep 27, 1988 |
| Priority date | — |
| Expiry date | Mar 28, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/128
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Longer shaft seal life in centrifugal pumps is realized by returning liquid from the pressure side of the pump to the seal area via a passage formed in a rib of the housing wall, and without porting the impeller, so that pump efficiency is kept high and its self-priming ability is retained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.