Motor-driven pump unit for a high-pressure cleaning apparatus
US4480967A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 14, 1982 |
| Grant date | Nov 6, 1984 |
| Priority date | — |
| Expiry date | Apr 14, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB08B2203/027
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a motor-driven pump unit for a high-pressure cleaning apparatus, where the cleaning fluid supplied by the high-pressure pump is conveyed through the housing of the motor so as to cool the motor, in order to improve the cooling characteristics and in order to reduce the dimensions of the motor-driven pump unit it is proposed that a fan wheel, which is driven by the motor and which directs a cooling air stream towards the motor housing, be disposed at the end of the motor opposite the pump, and that the fan wheel and the cooling surfaces of the motor be designed in such a way that an adequate cooling of the motor is achieved by the air stream cooling alone when the pump is not conveying any cleaning fluid to the cleaning apparatus or, in other words, is pumping the cleaning fluid only in circulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.