Patent ID: 7128681

Claim:
A transmission comprising: an input shaft; a countershaft, which is disposed in parallel with said input shaft; a planetary gear train, which includes a sun gear element, a carrier element and a ring gear element, said carrier element being connected to said countershaft and said ring gear element being connected to an output shaft; a first gear train including a first drive gear, which is disposed rotatably over said input shaft, and a first driven gear, which meshes with said first drive gear and is fixed on said countershaft, so that said first driven gear and said countershaft can rotate together as a one-piece body; first clutching means, which connects or disconnects said first drive gear to or from said input shaft; a second gear train including a second drive gear, which is disposed rotatably over said input shaft, and a second driven gear, which meshes with said second drive gear and is connected to said sun gear element, so that said second driven gear can rotate together with said sun gear element as a one-piece body; second clutching means, which connects or disconnects said second drive gear to or from said input shaft; a reverse gear train including a reverse drive gear, which is disposed rotatably over said input shaft, a reverse driven gear, which is connected to said sun gear element so that said reverse driven gear can rotate together with said sun gear element as a one-piece body, and an idler gear, which meshes with said reverse drive gear and with said reverse driven gear; reverse clutching means, which connects or disconnects said reverse drive gear to or from said input shaft; braking means, which can hold said sun gear element stationary; and planetary gear clutching means, which connects said sun gear element and said carrier element or disconnects them from each other.