Gm Global Technolgoy Operations, Inc.

Douglas C Armstrong

Raymond James Haka

Paul Dwight Stevenson

A manual planetary power transmission includes two planetary gearsets and three torque-transmitting synchronizer assemblies. Two of the synchronizer assemblies permit the control of one gear member of the planetary gearsets individually. The third synchronizer permits control of two of the planetary gear members individually or simultaneously. The three synchronizer assemblies are manipulable in combinations of three to provide six forward speed ratios and one reverse speed ratio in the planetary gearsets.

Manual planetary transmission with synchronizer clutches and brakes

A synchronizer clutch assembly includes an input driver member having a shift collar disposed thereon. A plurality of driven members are included in the synchronizer assembly and are operatively connected by the shift collar to provide at least three drive paths from the input driver member to one or more of the output driven members.

Multiple connection synchronizer

A self contained servo mechanism (10, 110) for actuating a friction band assembly (13) in a planetary gear set. The servo mechanism (10, 110) is contained within a housing (25, 125) which incorporates a piston chamber (32, 132). The housing (25, 125) is demountably secured within a socket cavity (21, 121) provided in the transmission case (11, 111). A piston means (40, 140) is slidably received within the chamber (32, 132), and the piston means (40, 140) is operatively secured to an actuating pin (55, 155) that is slidably received within a pilot bore (34, 134) which penetrates the housing (25, 125) and which is aligned with the piston chamber (32, 132). The actuating pin is, in turn, operatively connected to a friction band assembly (13) within the transmission case (11, 111). A cover (41, 141) is secured to the transmission case (11, 111) not only to close the socket cavity (21, 121) and the interior cavity (12, 112) of the transmission case (11, 111) from the environment but also to close the piston chamber (32, 132) and to define a pressure portion (51, 151) of the chamber (32, 132) to act against the head (52, 152) of the piston (40, 140). Feed means (75, 175) are provided to effect hydraulic communication to the pressure portion (51, 151) of the piston chamber (32, 132).

Growing community of inventors

Novi, MI, United States of America

Douglas C Armstrong