| 摘要 |
<p>PCT No. PCT/DK96/00094 Sec. 371 Date Jul. 2, 1997 Sec. 102(e) Date Jul. 2, 1997 PCT Filed Mar. 6, 1996 PCT Pub. No. WO96/27728 PCT Pub. Date Sep. 12, 1996The operating device has an input shaft (20) which by one end is connected with a driving arrangement with a rotatable wheel (17) for receiving an endless cord (8), and which by the other end is coupled to an output shaft (14) which is connected in a rotationally locked manner with the screening arrangement. The input shaft (20) is connected with the output shaft (14) via a transmission shifting device, in particular a planet gear (21). Between the transmission shifting device and the output shaft, a mechanism is engaged for limitation of the transferred driving torque. This mechanism is constituted by a sliding clutch having a first coupling part (25) in connection with the transmission shifting device (21) and a second coupling part (26) in connection with the output shaft (14). The first coupling part (25) may have a toothed shaft (24)and the second coupling part (26) a slotted and toothed rim (27), or vice versa. Furthermore, a brake is provided for retaining the screening arrangement in an arbitrary position.</p> |
