Hygienic self-priming centrifugal pump
US6585493B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 20, 2001 |
| Grant date | Jul 1, 2003 |
| Priority date | — |
| Expiry date | Sep 20, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D9/041
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A hygienic, self-priming centrifugal pump (1) with a pump housing (4) provided with an inlet opening (2) and a pressure connecting piece (3), where an impeller wheel (7) can rotate inside said pump housing. The inlet opening (2) is connected with a liquid ring pump section (9) comprising an auxiliary housing (10) and a pump screw (11). The pump screw (11) is mounted on and in extension of the hub (7a) of the impeller wheel. A recycling pipe (15) for pump liquid connects the pressure connecting piece (3) of the centrifugal pump and the auxiliary housing (10) of the liquid ring pump section (9), optionally the inlet nozzle (16) or the inlet pipe (18) of the latter. All the surfaces in the pump housing (4) and the auxiliary housing (10) in direct contact with liquid should be smooth and rounded and without holes, crevices, beads or burrs. As a result, the efficiency of the centrifugal pump has been improved, and furthermore the centrifugal pump is more suited for both CIP-cleaning and ordinary manual cleaning than hitherto known pumps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.