| 摘要 |
PCT No. PCT/FR84/00131 Sec. 371 Date Jan. 15, 1985 Sec. 102(e) Date Jan. 15, 1985 PCT Filed May 15, 1984 PCT Pub. No. WO84/04570 PCT Pub. Date Nov. 22, 1984.The driving shaft (11) is equipped with two oppositely threaded worms (13a, 13b) with which respectively mesh on opposite sides two worm-wheels (14a, 14b) of a first kinematic channel and two worm-wheels (16a, 16b) of a second kinematic channel, and the worm-wheels of the two channels situated on the same side of the shaft (1) mesh together, the worm-wheels (14a, 14b) of one channel being constrained to rotate with intermediate gear-wheels (15a, 15b) which mesh with a gear-wheel (17) mounted on the driven output shaft, the shafts which carry the worm-wheels of the two kinematic channels being mounted to float in the axial direction. |
