In-line centrifugal pump
US4305214A · kind A · utility
Inventor
Key dates
| Filing date | Aug 10, 1979 |
| Grant date | Dec 15, 1981 |
| Priority date | — |
| Expiry date | Aug 10, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D7/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A ladder pump for use with a hydraulic dredge to increase the main pump efficiency comprises a casing and a vaned impeller located in the casing and mounted for rotation about a normally horizontal axis transverse to the ladder. The casing has an inlet and an outlet defining respective axes lying in a common plane perpendicular to the impeller axis and defining a deflection angle therebetween, with approximately 60.degree. being typical. The diameter of the impeller and the inner dimensions of the casing together define a substantial clearance over at least that portion of an impeller vane's travel between the inlet and the outlet, so that large solid objects entering the pump may pass under the impeller and out the pump outlet. The impeller may have substantially rigid vanes, or the vanes may be flexible. The ladder pump fits in-line with respect to the suction pipe, and has an axial extension little wider than the pipe itself. Thus it is readily positioned proximate the suction mouthpiece where it can work most effectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.