Patent ID: 8517888

Claim:
A mechanical power transmission system comprising: a case; at least one rotational member; a gear set being in operable communication with said at least one rotational member wherein said gear set includes a first gear being in operable communication with said at least one rotational member, wherein said gear set further includes a planetary carrier and also includes planetary gears being rotatably supported by said planetary carrier and being in operable communication with said first gear, wherein said gear set further includes a second gear being in operable communication with said planetary gears, wherein said second gear is a ring gear; and a clutch means being in operable communication with said gear set and adapted to use external fluid pressure from a fluid source for changing speeds; wherein said clutch means includes a cone clutch and a gear coupler, wherein said clutch means also includes actuators with fluid pressure from the fluid source being controllably appliable to said at least one of said actuators, wherein said at least one of said actuators includes a first actuator which is in operable communication with said cone clutch for moving said cone clutch to engage or disengage from said ring gear, and also includes a second actuator which is in operable communication with said gear coupler for urging said gear coupler in cooperation with said cone clutch to engage or disengage from said ring gear.