Patent ID: 6910987

Claim:
A transmission comprising, an input drive shaft, the input drive shaft being elongated along and rotatable about an axis, an elongated output shaft, the output shaft being rotatable about and coaxial with the axis, an input sun gear being selectively rotatable about the axis, a one-way clutch coupled to the input shaft for rotation therewith and selectively engaging the input sun gear, the one-way clutch operable to rotate the input sun gear in forward rotation about the axis when the input drive shaft is rotated about the axis at a faster forward rate than the output drive shaft, an output sun gear spaced axially from the input sun gear, the output sun gear being selectively rotatable about the axis, an output gear brake assembly selectively operable to permit or prevent rotation of the output sun gear radially about the axis, a first clutch assembly including, a first clutch drum assembly including a first selectively actuable clutch piston coupled to the input shaft for rotation therewith, and a first clutch plate array activatable by said first clutch piston to couple the first drum assembly and said output drive shaft, a second clutch assembly including, an annular ring gear having an annularly extending toothed ring gear surface extending radially about and spaced from the axis, a second selectively actuable clutch piston coupled to the ring gear for rotation therewith, and a second clutch plate array activatable by said second clutch piston to coupled the ring gear to the first drum assembly for rotation therewith, a ring gear brake assembly selectively operable to permit or prevent rotation of the ring gear, a planetary gear assembly comprising, a planet gear carrier fixed to said output shaft for rotation therewith, a first set of planetary gears rotatably mounted on said planet gear carrier and meshing with a portion of said input sun gear, and a second set of compound planet gears rotatable mounted on said planet gear carrier, each second compound gear comprising, a first diameter portion and a second diameter portion spaced axially from the first diameter portion, the first diameter portion interposed between and meshing with an associated one of said first planetary gears and said toothed ring gear surface, the second diameter portion meshing with said output sun gear.