Underground drainage facility, vertical-shaft multi-stage adjustable vane pump, and method of running drainage pump
US5624226A · kind A · utility
6Cited by
7References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 1, 1994 |
| Grant date | Apr 29, 1997 |
| Priority date | — |
| Expiry date | Nov 1, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/402
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A vertical-shaft multi-stage pump has adjustable vanes on its lower stage. A vane angle operating mechanism has an operating shaft extending through a hollow portion of the drive shaft of the upper stage and a link mechanism connected to the operating shaft and the adjustable vane impeller for converting axial motion of the operating shaft into vane angle rotational motion. The pump is particularly suited for use in an underground drainage system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.