Pump with air purging and self-cleaning features
US6059535A · kind A · utility
2Cited by
5References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1998 |
| Grant date | May 9, 2000 |
| Priority date | — |
| Expiry date | Jan 22, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D9/001
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A pump installation used to maintain liquid level in a tank by pumping down liquid introduced into the tank with rotation of an impeller about a vertical axis features an air purging flow defined by axial openings through the pump impeller and an annular clearance space between the impeller drive and the pump housing cover, the space disposed above the impeller axial openings. A support sleeve surrounding the impeller drive and secured to the pump motor and tank top has openings at the bottom thereof which sets up a flushing liquid flow to eliminate solids forced up through the clearance space and into the sleeve interior.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.