Variable pump control for hydraulic fan drive
US6179570A · kind A · utility
19Cited by
11References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 8, 1999 |
| Grant date | Jan 30, 2001 |
| Priority date | — |
| Expiry date | Jun 8, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B2205/18
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A variable pump control for a hydraulic fan drive is provided to control the speed of the fan between a maximum and a minimum desired value. A proportional solenoid valve arrangement is provided to established a maximum displacement of a variable displacement pump which drive a fluid motor having a cooling fan attached thereto. A variable electrical signal is directed to the proportional solenoid valve arrangement to proportionally reduce the displacement of the pump thus reducing the speed of the cooling fan to a predetermined minimum desired level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.