Title:
【考案の名称】自転車のクランク駆動チェーン輪装置
Document Type and Number:
Japanese Patent JP3015024
Kind Code:
U
Abstract:
A bicycle crank driven chain wheel assembly uses a special-shaped chain wheel. The chain wheel has portions of different driving radii. The portion having smaller driving radii is engaged in transmission when the bicycle runs on slopes, so that the bicycle rider can drive the bicycle with smaller force. The portion having larger driving radii carries out transmission when the bicycle runs on flat road, so that the bicycle can be speeded up. The crank is mounted in such a manner that it can rotate with respect to the chain wheel within predetermined range of angle, so as to select the corresponding portion of the chain wheel to be engaged in transmission in accordance with the resistance to motion of the bicycle or with the condition of the road on which the bicycle runs. Thus, a variable transmission can be automatically achieved corresponding to the resistance to motion of the bicycle or to the condition of the road.
More Like This:
Inventors:
Sen Nai Chan
Application Number:
JP91495U
Publication Date:
August 29, 1995
Filing Date:
February 22, 1995
Export Citation:
Assignee:
Suchuan Shin Shin Jii Gong Chen You Sien Renngong
Sen Nai Chan
Sen Nai Chan
International Classes:
B62M9/08; (IPC1-7): B62M9/08; B62M25/00
Attorney, Agent or Firm:
Yoshikazu Tani (1 person outside)