Change gear transmission in group arrangement for motor vehicles, especially for use in agriculture and in the construction field

Claim 1

In combination with a geared transmission in group arrangement, especially for motor driven agricultural and construction vehicles; a primary group having an input shaft adapted for connection to a source of power by a selectively operable friction clutch and an output shaft, a countershaft and a primary friction clutch member fixed on said countershaft, a pair of first gears rotatable on said countershaft, one on each side of said primary clutch member and a pair of secondary friction clutch members each connected to one of said first gears for selective cooperation with said primary friction clutch member, a pair of second gears fixed to said output shaft and each meshing with one of said first gears, so that selective engagement of one of said secondary friction clutch members with said primary friction clutch member will drive said output shaft through one of said first gears meshing with one of said second gears, another pair of meshing gears fixed to said input shaft and said countershaft, respectively, in a plane adjacent the plane of one pair of said first and second meshing gears, and coupling mechanism carried by said gear on said countershaft and the first gear in the adjacent plane comprising movable means on one of the said gears movable to engage cooperating means on the other of the said gears for driving the said first and second gears in a plane adjacent said another pair of meshing gears and said output shaft independently of said primary and secondary disengageable friction clutch members bypassed thereby, said transmission including means for connecting said output shaft to a load to be driven.