Title:
BICYCLE CRANK ARM ASSEMBLY HAVING LENGTH EXTENSION EFFECT
Document Type and Number:
WIPO Patent Application WO/2023/182740
Kind Code:
A1
Abstract:
Disclosed is a bicycle crank arm assembly (100), wherein an auxiliary arm is detachably mounted between the end of a bicycle crank arm and a pedal to extend a power transmission point during pedaling, so that the effect of extending the length of the bicycle crank arm is ultimately obtained, and a leverage effect is increased to enable efficient pedaling. An auxiliary arm (60) of the bicycle crank arm assembly (100) is detachably mounted between the other end of the bicycle crank arm (23A) and the pedal (24A) of the bicycle by a screw-type mounting means. The auxiliary arm (60) includes a crank arm fastening part (63) and a pedal fastening part (64) connected integrally and a connection part (66) smoothly connected therebetween, one sides of the crank arm fastening part (63) and the pedal fastening part (64) are formed in an arc shape, the other sides of the crank arm fastening part (63) and the pedal fastening part (64) are integrally connected in a semicircular shape, and the connection part (66) is provided at an intermediate position on the other sides of the crank arm fastening part (63) and the pedal fastening part (64). At the one sides of the crank arm fastening part (63) and the pedal fastening part (64) formed in an arc shape, the boundary between the crank arm fastening part (63) and the pedal fastening part (64) is formed to go inward by a certain distance, wherein a cutout part (65) is formed in a portion other than the connection part (66), and accordingly, the crank arm fastening part (63) and the pedal fastening part (64) are spaced apart from each other.
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Inventors:
SEO DAL WON (KR)
Application Number:
PCT/KR2023/003642
Publication Date:
September 28, 2023
Filing Date:
March 20, 2023
Export Citation:
Assignee:
SEO DAL WON (KR)
International Classes:
B62M3/16; B62M3/00; B62M3/08
Foreign References:
| JPS5624394U | 1981-03-05 | |||
| EP1442973A2 | 2004-08-04 | |||
| JP2003054477A | 2003-02-26 | |||
| KR101904703B1 | 2018-10-04 | |||
| JPH0744941U | 1995-12-05 |
Attorney, Agent or Firm:
DAWOOL PATENT AND LAW FIRM (KR)
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