Patent ID: 8231492
Filing Date: 2012-07-31
Classification: F16D

Abstract:
1. A torque transmitting device comprising: a case; a plurality of clutch plates; a ramp member being selectively rotatable about an axis and defining a ramp surface; a worm gear that is operatively connected to the ramp member for rotation therewith about the axis; a worm shaft that is in meshing engagement with the worm gear such that rotation of the worm shaft causes rotation of the worm gear about the axis; a roller element mounted with respect to the case and contacting the ramp surface; wherein the ramp surface is configured such that, when the ramp member is rotated about the axis in either of two rotational directions, the roller element exerts a reaction force on the ramp surface that urges the ramp member to move in a first axial direction and thereby transmit the reaction force to the clutch plates; and an apply member operatively connected to the ramp member to receive the reaction force, and being selectively axially movable to contact at least one of said clutch plates.