Twist grip for actuating gears of a pedal cycle

Details Twist grip for actuating gears of a pedal cycle Twist grip for actuating gears of a pedal cycle

1995-06-02

1997-09-16

Marmor, Charles A.

Machine element or mechanism

Control lever and linkage systems

Multiple controlling elements for single controlled element

74506, G05G 1100, F16C 110

Patent

active

056668589

ABSTRACT:
In a twist selector grip for selecting pedal cycle gear ratios, the rotary movement of the grip (3) is converted to a longitudinal movement of a tension member (2). The tension member (2) is fastened to the grip (3) and wound, similar to a screw thread, about the pedal cycle handlebar (1) or a sleeve (4) enclosing it. The tension member (2) is guided in a longitudinal guide (5) fixed in position relative to the pedal cycle handlebar (1) at a relatively great distance, in the direction of the rotation axis of the grip (3), from the fastening point (6) of the tension means (2) to the grip (3). By this construction, the arcuate distance the fastening point (6) travels, upon rotation of the grip (3), is significantly greater than the travel of the tension means (2) in its longitudinal guide (5), whereby a favorable conversion of large rotational movements of the grip (3) into small longitudinal movements of the tension means (2) is achieved. The grip (3) is releasably retained in its speed ratio selecting positions by a spring biased detent having an adjustable retaining force.

REFERENCES:
patent: 635084 (1899-10-01), Taylor
patent: 2874587 (1959-02-01), Schmid
patent: 4840081 (1989-06-01), Nagano
patent: 5134897 (1992-08-01), Romano
patent: 5241877 (1993-09-01), Chen

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