A crank assembly for a bicycle includes a crank arm, multiple first and second securing members, and a sprocket unit having small, medium, and large sprockets. The small sprocket includes a toothed ring and multiple first fastening pieces. The medium sprocket includes a toothed ring, multiple second and third fastening pieces, and multiple spacing-adjustment pieces each extending obliquely and interconnecting a respective one of the second fastening pieces and a respective one of the third fastening pieces. The large sprocket includes a toothed ring and multiple fourth fastening pieces. The first securing members secure the small and medium sprockets to the crank arm. The second securing members secure the large sprocket to the medium sprocket.
CRANK ASSEMBLY
14.06.2018
Patent
Elektronische Ressource
Englisch
| IPC: | B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer |
PEDAL CRANK, PEDAL CRANK ASSEMBLY AND A BICYCLE HAVING A PEDAL CRANK ASSEMBLY
| Europäisches Patentamt | 2022