Patent ID: 9506507
Filing Date: 2016-11-29
CPC Classification: F16D

Claim Text:
1. A viscous clutch comprising: a rotor; a housing member; a working chamber located between the housing member and the rotor, wherein a viscous fluid present in the working chamber rotationally couples the rotor and the housing member; a reservoir to hold the viscous fluid, the reservoir configured to rotate with the rotor; a return bore in fluid communication between the working chamber and the reservoir, to allow the viscous fluid to return from the working chamber to the reservoir; a first passage from the reservoir to the working chamber; a second passage from the reservoir to the working chamber, wherein the second passage is spaced from the first passage, and wherein the second passage extends substantially radially through the rotor; and a valve, wherein the valve is configured to selectively regulate flow of the viscous fluid through the first passage, wherein the second passage is unobstructed such that the viscous fluid can pass from the reservoir to the working chamber regardless of an operational state of the valve.