Hard material impeller and methods and apparatus for construction
US6986644B2 · kind B2 · utility
2Cited by
7References
38Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 2, 2003 |
| Grant date | Jan 17, 2006 |
| Priority date | — |
| Expiry date | Nov 19, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49343
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Methods of producing impeller castings from very hard materials are disclosed in which the formation of a selectively configured core produces an impeller casting that does not need to be machined to receive the drive shaft and eliminates the need for employing a lead babbitt or soft insert, as is known in the prior art, to receive the drive shaft, thereby producing a hard material impeller for a centrifugal pump that is significantly less costly to produce and is environmentally safe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.