Impeller pump with self-priming column attachment
US4523900A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 22, 1984 |
| Grant date | Jun 18, 1985 |
| Priority date | — |
| Expiry date | Mar 22, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/445
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The combination of a motor-driven impeller pump assembly and a self-priming column attachment. The column attachment is detachably secured to the pump assembly and includes an elongate shaft exterior which is attached to an impeller in the pump assembly with a detachable connection. An axial flow inducer is located at the bottom end of the column attachment and serves to lift a fluid in the column towards the impeller. A balance line conduit extends from a balance chamber located behind the impeller downwards on the extension of the column to the level of the axial flow inducer, thereby serving to lessen axially imbalanced forces acting on the impeller pump assembly. The column also includes a set of straightener vanes to reduce rotational flow through the length of the column. A double-volute chamber surrounding the impeller serves to radially balance forces acting on the impeller, the motor and their associated bearings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.