Bicycle speed change system, bicycle speed change method and bic

Details Bicycle speed change system, bicycle speed change method and bic Bicycle speed change system, bicycle speed change method and bic

1994-02-17

1995-02-21

Luong, Vinh T.

Machine element or mechanism

Control lever and linkage systems

Hand operated

74489, 474 80, F16C 110, G05G 1100

Patent

active

053905652

ABSTRACT:
The following technical measure is taken to provide a bicycle speed change system or method wherein a speed change operation can be performed substantially without unhanding a handlebar and without erroneously shifting to a lower or higher speed.
Specifically, the bicycle speed change system (1) comprises a front speed shifter (1a), a rear speed shifter (1b), and speed change operation assemblies respectively including cylindrical operation members (4a, 4b) rotatably supported around right and left grip portions (3a, 3b), respectively, of a handlebar (2); each of the shifters being operated by a control cable (T) which is pulled or released by rotating a corresponding one of the cylindrical operation members, wherein each of the cylindrical operation members (4a, 4b) is designed so that rotation thereof in a direction of moving its top surface rearward causes a corresponding one of the shifters (1a, 1b) to shift to a lower speed position.

REFERENCES:
patent: 3218879 (1965-11-01), Reed
patent: 3856123 (1974-12-01), Kinsey
patent: 4352303 (1982-10-01), Christner
patent: 4653613 (1987-03-01), Blancas
patent: 5009629 (1991-04-01), Tagawa
patent: 5052242 (1991-10-01), Look
patent: 5102372 (1992-04-01), Patterson
patent: 5197927 (1993-03-01), Patterson
patent: 5303608 (1994-04-01), Iwasaki

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