Machine element or mechanism – Mechanical movements – Oscillation or reciprocation to intermittent unidirectional...
Patent
1989-11-27
1991-09-03
Herrmann, Allan D.
Machine element or mechanism
Mechanical movements
Oscillation or reciprocation to intermittent unidirectional...
74475, 745022, F16H 2702, B60K 2000
Patent
active
050442139
ABSTRACT:
A bicycle speed control apparatus according to this invention comprises a take-up element for winding up a speed control cable, the take-up element being urged in a cable unwinding direction, a wind-up control member for rotating the take-up element in a cable winding direction, a position maintaining mechanism including a first engaging member and a first engaging portion engageable stepwise for maintaining the take-up element in a selected position, a rotation limiting mechanism including a second engaging member and a second engaging portion engageable stepwise for limiting rotation in the unwinding direction of the take-up element to a predetermined amount, and an unwind control member operable to effect a change speed by actuating the rotation limiting mechanism and releasing the take-up element from the position maintaining mechanism for unwinding the cable.
The first engaging member of the position maintaining mechanism and the second engaging member of the rotation limiting mechanism are movable independently of each other. The apparatus thereby achieves improved durability and relaxation of the requirement for manufacturing dimensional precision.
REFERENCES:
patent: 3945477 (1976-03-01), Macher et al.
patent: 4232564 (1980-11-01), Yamasaki
patent: 4658667 (1987-04-01), Schuller
patent: 4864885 (1989-09-01), Nagano
patent: 4876913 (1989-10-01), Romano
EP 89--12--1848, European Search Report
Herrmann Allan D.
Laub David W.
Shimano Industrial Co. Ltd.
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