Viscous clutch with controlled drain back
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United States of America Patent
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-
Sep 1, 2009
Grant Date -
Nov 22, 2007
app pub date -
May 18, 2006
filing date -
May 18, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A viscous fluid clutch for controlling the rotation of an engine cooling fan has a dividing disk separating a storage chamber from a working chamber. The dividing disk includes an opening having a geometry that defines a drain-back path to the working chamber regardless of the angular orientation of the clutch.
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