Patent ID: 7070527
Filing Date: 2006-07-04
Classification: F16H

Abstract:
1. A clutch assembly comprising: an axially stationary sheave and an axially movable sheave, each sheave having a sheave body with an inner face and an outer face, the inner faces of the sheaves being oppositely disposed from each other, forming a pulley; a plurality of ribs protruding from the outer face of at least one of the axially stationary sheave or the axially movable sheave, the plurality of ribs being spatially distributed over the outer face of the at least one sheave; and at least one bore abutting a side of one or more ribs of the plurality of ribs, the at least one bore positioned to lead the one or more ribs in the rotating direction of the at least one sheave, the at least one bore extending entirely through the at least one sheave, and the at least one bore positioned so air striking the side of the one or more ribs enters the at least one bore when the at least one of the axially stationary sheave or the axially movable sheave is rotated.