Pump with seal rinsing feature
US6966749B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2004 |
| Grant date | Nov 22, 2005 |
| Priority date | — |
| Expiry date | Jan 29, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/128
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A centrifugal pump has a pump case and a rotatable impeller disposed within the pump case. A central aperture is defined within the rearward wall of the pump case to facilitate the connection of an impeller drive shaft to the impeller. A drive shaft seal is disposed within the central aperture to seal the impeller drive shaft to the pump case. At least one or more grooves are defined in the rearward wall of the pump case to carry liquids to and from the drive shaft seal. One or more radial ridges are disposed on the rearward side of the impeller to encourage liquids to flow within the grooves to and from the drive shaft seal to continuously wash away precipitates around the seal and to cool the seal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.