Electric pump for use in filtering system of a tropical fish tank or the like
US4512724A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 17, 1983 |
| Grant date | Apr 23, 1985 |
| Priority date | — |
| Expiry date | Mar 17, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05B2260/303
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An electrically driven pump (10) for circulating liquid in a fish tank (16) or the like comprises a stator (32); an impeller-rotor assembly (80) comprising a shaft (82), a magnetic rotor (84) mounted on the shaft (82) for rotation in response to the electromagnetic field produced by the stator (32), and an impeller (100) rotatable with the rotor (84); and a housing (50, 60) disposed adjacent the stator (32) and defining a chamber for supporting the impeller-rotor assembly (80), the housing having inlet (44) and outlet (70) openings, one of the openings (70) being spaced from one end of the impeller-rotor assembly (80), the housing (50, 60) also defining a connecting channel (66) communicating the one opening (70) with the one end of the assembly (80) for bathing the one end of the assembly (80) in liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.