Pump
US4798517A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1987 |
| Grant date | Jan 17, 1989 |
| Priority date | — |
| Expiry date | Sep 30, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D15/0038
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The disclosed pump includes a casing housing a working chamber and an impeller. The impeller includes a blade wheel mounted on a rotational shaft, a plurality of pumping blades extending axially from the periphery of the blade wheel and a cover mounted within the casing and fitted over the blade wheel for rotation therewith. The cover includes an end face member defining one side of the working chamber and a cylindrical skirt portion depending from the periphery of the end face member and encircling the blade wheel and defining a hollow interior space within the impeller between the end face member and the blade wheel. The end face member has a plurality of slots through which the blades extend into the working chamber. The interior surface of the cover defines a plurality of pockets, each contoured to receive and mate with one of the blades so that in use each blade rests flush against one surface of the pocket with no space for fluid therebetween.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.