Patent ID: 9618059
Date: 2017-04-11
CPC Classifications: F16D,F16H

Claim:
1. A viscous clutch comprising: a housing assembly; a rotor assembly including a disk; a reservoir to hold a supply of a shear fluid; a working chamber operatively positioned between the housing assembly and the rotor assembly, wherein selective introduction of the shear fluid to the working chamber facilitates selective torque transmission between the housing assembly and the rotor assembly; a fluid return bore that extends radially through at least a portion of the disk to the working chamber, the fluid return bore forming at least a portion of the fluid return path from the working chamber to the reservoir; a pump bore insert having a bore in fluid communication with a fluid return path extending from the working chamber to the reservoir, wherein the pump bore insert is positioned at least partially within the radially-extending fluid return bore; and an electromagnetically actuated valve assembly configured to controllably translate a first valve subassembly that controls flow of the shear fluid between the reservoir and the working chamber.