Derailleur for a bicycle

Details Derailleur for a bicycle Derailleur for a bicycle

1986-10-16

1988-03-15

Leppink, James A.

Endless belt power transmission systems or components

Control for variable input to output speed-ratio

Including belt shiftable axially from one to another surface...

474 80, 474 82, F16H 906

Patent

active

047310456

ABSTRACT:
A bicycle derailleur which includes a linkage mechanism formed of a base member, an inner linkage member, an outer linkage member, and a movable member carrying a chain guide. The derailleur also includes a connecting assembly formed of a pair of connecting pins for respectively pivotably supporting one end of each of the inner and outer linkage members to the base member and a pair of connecting pins for respectively pivotably supporting the movable member to the other end of each of the inner and outer linkage members. The connecting pins are oriented obliquely with respect to a predetermined plane perpendicular to the axis of the sprocket assembly. The chain guide, responsive to deformation of the linkage mechanism, moves axially and radially of the sprocket assembly. The inner linkage member has an upper surface at its end connected to the base member which is positioned on a side closer to the axis of the multi-stage sprocket assembly relative to a line extending from the upper surface of the outer linkage member at its end connected to the base member and perpendicular to the axis of the connecting pin connecting the outer linkage member to the base member.

REFERENCES:
patent: 3964330 (1976-06-01), Ozaki
patent: 4362523 (1982-12-01), Huret
patent: 4610644 (1986-09-01), Nagano

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