Drainage pump
US4998861A · kind A · utility
6Cited by
2References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1989 |
| Grant date | Mar 12, 1991 |
| Priority date | — |
| Expiry date | Dec 6, 2009 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06F2103/48
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A drainage pump includes a pump casing having an inlet and an outlet, and an impeller accommodated in the casing and rotated by a driving motor. The impeller has a plate-like vane. A liquid flows from the inlet toward a front end portion of the vane along the axis of the vane, and is discharged from the outlet in a direction substantially perpendicular to the axis of the vane. The front end portion of the vane has a convex shape, and therefore has an inclined portion which extends from a portion located on the axis of the vane to an outer peripheral edge thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.