Pump motor having fluid cooling system
US5997261A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1997 |
| Grant date | Dec 7, 1999 |
| Priority date | — |
| Expiry date | Oct 31, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K2211/03
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A brushless water pump motor includes a pump housing having an impeller chamber with an impeller disposed therein, and a motor assembly coupled at a first end thereof to the pump housing. The motor assembly includes a stator assembly having laminations and windings, the stator having an interior portion defining a rotor chamber in which a rotor assembly is disposed. There is a partition structure provided between the rotor assembly and the stator assembly for isolating the stator assembly from the rotor chamber, and the partition structure has a wall in communication with the rotor chamber. The pump/motor assembly further includes a hollow shaft in communication with the rotor chamber, such that the rotor assembly and impeller are mounted on the hollow shaft. A bearing structure is operatively associated with the hollow portion of the shaft for supporting the shaft for rotational movement. The pump motor further includes an electronic control unit coupled to a second end of the motor assembly and has an upper surface in communication with the rotor chamber. A fluid flow path structure is arranged to permit fluid to pass from a high pressure portion of the impeller chamber to enter …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.