Filtering system for pump shaft seals
US5372730A · kind A · utility
8Cited by
13References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 17, 1993 |
| Grant date | Dec 13, 1994 |
| Priority date | — |
| Expiry date | Aug 17, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S277/918
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filtering system for a pump shaft seal includes a filter for preventing abrasive, fibrous, or other solid materials from entering the region of the stuffing box of the pump in the proximity of the seal. The filter is mounted on the pump shaft between the pump impeller and the seal, adjacent a recirculation flush port of the pump. A venturi draw is used to continuously draw fluid from between the filter and the seal and webs arranged on the rotating filter cause a localized back flushing of the filter to remove accumulated solid material from a front face of the filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.