Viscous fan drive having modified land design and armature venting
US7621386B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 2, 2006 |
| Grant date | Nov 24, 2009 |
| Priority date | — |
| Expiry date | Oct 16, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D35/024
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A viscous fan drive in which the output drive to the fan is controlled by the movement of viscous fluid from a fluid reservoir and into the operating and working chamber of the coupling during normal operation. The input-coupling assembly and cover member are formed with a unique combination of continuous and non-continuous radially extending lands and grooves designed to distribute the viscous fluid in a continuous film throughout the shear zone so as to maximize output fan speed at a given input speed. An armature-venting feature is designed to simplify the opening and closing of the valve disk in an electronic version of the viscous fan drive depending upon the desired operating condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.