Patent ID: 7530437

Claim:
A transmission synchronizer, comprising a coupling sleeve; a synchro hub; a balk ring including a balk ring cone surface; a clutch gear including a clutch gear cone surface; a relative rotation regulating structure located between the balk ring and the synchro hub; and a synchronizing support force generating mechanism located between the balk ring and the synchro hub and spaced apart in a circumferential direction from the relative rotation regulating structure; wherein a relative rotation is generated between the synchro hub and the balk ring during a shift by a minute synchronizing torque generated between the balk ring cone surface and the clutch gear cone surface, the relative rotation inducing a circumferential force; wherein the synchronizing support force generating mechanism is adapted to convert the circumferential force to a synchronizing support force, the synchronizing support force axially-applied to press the balk ring against the clutch gear; wherein the relative rotation regulating structure is adapted to regulate the relative rotation between the balk ring and the synchro hub to prevent generation of the synchronizing support force by the synchronizing support force generating mechanism while in neutral.