Pump impeller seals with spiral grooves
US4242039A · kind A · utility
125Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 15, 1978 |
| Grant date | Dec 30, 1980 |
| Priority date | — |
| Expiry date | Nov 15, 1998 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/2266
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to internal and shaft outlet seals of a pump. On both sides of a paddle-wheel are arranged a pair of coaxial discs (22-23) and (24-25), the face of one disc being smooth and the face of the other disc having spiral grooves, one of the discs of each pair being interlocked in rotation with wheel 5, whereby the liquid between two discs is subjected to a pressure increase radially outwardly compensating at least for the pressure increase due to pumping by wheel 5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.