Patent ID: 8540065

Claim:
A selectable one way clutch assembly comprising: an outer race; an inner race concentric with the outer race about a central axis; a plurality of struts disposed between the outer race and the inner race; a slide plate concentric with and disposed between the outer race and the inner race, and rotatably moveable between a first mode position, a second mode position and a third mode position for selectively moving the plurality of struts into and out of interlocking engagement with the outer race and the inner race; wherein the plurality of struts engage the outer race and the inner race in interlocking engagement for transmitting torque between the outer race and the inner race in a first direction when the slide plate is in the first mode position, the plurality of struts are disengaged from the inner race to allow the inner race to freewheel relative to the outer race when the slide plate is in the second mode position, and wherein the plurality of struts engage the outer race and the inner race in interlocking engagement for transmitting torque between the outer race and the inner race in a second direction opposite the first direction when the slide plate is in the third mode position; and a mode selector mechanism configured for moving the slide plate between the first mode position, the second mode position and the third mode position, the mode selector mechanism including: a lever coupled to the slide plate and moveable between a first position locating the slide plate in the first mode position, a second position locating the slide plate in the second mode position, and a third position locating the slide plate in the third mode position; a lever biasing device biasing the lever in a first direction; a piston acting in opposition against the lever biasing device for moving the lever in a second direction opposite the first direction, wherein the piston is actuated by a variable hydraulic signal; and a detent configured for engaging the lever and securing the lever in the second position when the variable hydraulic signal is between the first fluid pressure and the second fluid pressure; wherein the detent includes a rolling element for engaging an outer edge of the lever; and wherein the rolling element is rotatable relative to the outer edge of the lever during movement of the lever between the first position, the second position and the third position.