Impeller pump with vaned backplate for clearing debris
US5489187A · kind A · utility
29Cited by
12References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 6, 1994 |
| Grant date | Feb 6, 1996 |
| Priority date | — |
| Expiry date | Sep 6, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D31/00
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A centrifugal pump including a pump casing with internal walls defining a pump chamber and a seal cavity or chamber to the rear of the pump chamber. A rotatable impeller within the pump chamber is rotated by an impeller shaft extending through the seal cavity. Seal structure exposed to the seal cavity seals the impeller shaft to the casing. Vane structures joined to the wall defining the seal cavity produce a movement in the pumpage circulated in the seal cavity effective to remove debris and air bubbles that otherwise collect in the seal cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.