Drive unit of cooling fan
US6286308A · kind A · utility
5Cited by
6References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 17, 1999 |
| Grant date | Sep 11, 2001 |
| Priority date | — |
| Expiry date | May 17, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01P7/044
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A discharged pressurized fluid of a primary hydraulic pump 2 driven by an engine 1 is supplied to an actuator 5 through an operating valve 4. A first hydraulic rotary machine 8 for rotating a cooling fan 7 is driven to rotate by a returning pressurized fluid of the actuator 5. A second hydraulic rotary machine 9 for rotating the cooling fan 7 is driven to rotate by the discharged pressurized fluid of an auxiliary hydraulic pump 3 which is driven by the engine 1. By utilizing the returning pressurized fluid of the actuator 5, the air blowing ability of the cooling fan is made high and the wasting of engine horse power is prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.