| 摘要 |
<p>PCT No. PCT/AT97/00169 Sec. 371 Date Jan. 19, 1999 Sec. 102(e) Date Jan. 19, 1999 PCT Filed Jul. 22, 1997 PCT Pub. No. WO98/03391 PCT Pub. Date Jan. 29, 1998A pedal crank drive for a bicycle, comprises a shaft (3) extending through a bearing housing (4), a chain wheel (8) having at least one gear rim (9), where the hub (7) of the chain wheel is rotatably mounted with respect to the shaft (3), and a power transmission spring (10) supported on the one hand on the shaft (3) and on the other hand on the hub (7) of the chain wheel (8) and disposed inside the bearing housing (4). The power transmission spring (10) consist of separate, individual spring elements (11) distributed around the periphery of the shaft (3) and each spring element is supported on the hub (7) of the chain wheel (8) and on the shaft (3).</p> |
