Pump fan control circuit and block for truck mountable hydraulic system
US9303662B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 26, 2013 |
| Grant date | Apr 5, 2016 |
| Priority date | — |
| Expiry date | Nov 19, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/6881
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic fan powered in a branch of a vehicle-carried working load hydraulic circuit helps cool hydraulic fluid in a cooler. A switching block has a bypass mode which kicks in whenever sensed hydraulic fluid temperature indicates an overheat condition. The bypass mode shuts off hydraulic fluid to all the working loads of the system, while circulating hydraulic fluid as fast as possible through the cooler and running the cooling fan at a slower rate. After the hydraulic fluid cools below the overheat threshold temperature, a start button must be pressed before the switching block will again power the working loads and run the fan at a higher speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.