Synchronizer

A synchronized transmission including at least one synchronizer assembly for selectively coupling a gear rotatably mounted about the axis of a shaft with said shaft, said gear having jaw clutch teeth and friction clutch elements at a side thereof facing said clutch and synchronizer assembly, said clutch and synchronizer assembly including a clutch collar member axially slidable on the shaft and mounted for rotation therewith, said clutch collar member having a first set of jaw clutch teeth adapted to cooperate with a second set of jaw clutch teeth on the gear, said clutch collar member having openings formed therethrough parallel to the shaft, an axially movable friction clutch member adapted to cooperate with the friction clutch element on the gear, blocking means rigidly mounted to said axially moveable friction clutch member, said blocking means having a nonblocking position for allowing axial movement of said clutch collar relative to said axially movable friction clutch member and a blocking position, said blocking means in the blocking position being adapted to block axial movement of said clutch collar member relative to said axial moveable friction clutch member when the latter and said clutch collar member are rotating asynchronously, said synchronizer assembly characterized by:

• anti-notchiness means (80) for cooperating with said clutch collar, subsequent to achieving synchronous rotation between said clutch collar and said gear and said blocking means obtaining the nonblocking position thereof, during axial movement of said clutch collar toward a position whereat said first and second sets of jaw clutch teeth will come into axially abutting relationship.