Bicycle front derailleur
AssigneeShimano (Singapore) Pte. Ltd.
InventorPeh Lian Siah
Life of this patent
Estimating the term…
Abstract
A bicycle front derailleur includes a fixed member, a movable member, a chain guide and a linking member. The fixed member is coupled to a bicycle frame. The movable member is movably coupled to the fixed member. The chain guide is coupled to the movable member and extends in a first direction approximately parallel with a lengthwise direction of the bicycle frame. The linking member extends between the fixed member and the movable member and is configured to move the chain guide in a second direction relative to the fixed member between at least a first position and a second position, the first and second directions crossing with an angle therebetween of between 50 and 70 degrees.
Claims17
A bicycle front derailleur comprising:
- a fixed member coupled to a bicycle frame;
- a chain guide movably coupled to the fixed member extending in a first direction approximately parallel with a lengthwise direction of the bicycle frame;
- and
- a linking member extending between the fixed member and the chain guide and configured to move the chain guide in a second direction relative to the fixed member between at least a first position and a second position, the first and second directions crossing with an angle of between 50 and 70 degrees.
A bicycle front derailleur comprising:
- a fixed member coupled to a bicycle frame;
- a chain guide movably coupled to the fixed member;
- and
- a linking member extending between the fixed member and the chain guide and configured to support the chain guide to move relative to the fixed member between at least a first position and a second position forward and away from the bicycle frame, the linking member including two first pivot portions that are co-axially aligned and configured to pivot about a first axis fixed relative to the fixed member and a single second pivot portion that pivots about a second axis fixed to and extending from the chain guide.
A bicycle front derailleur comprising:
- a fixed member;
- a chain guide movably coupled to the fixed member, the chain guide having a first length measured from front to back;
- and
- a linking member extending between the fixed member and the chain guide, the linking member pivotable about two spaced apart pivot axis that are a second distance apart from one another, with the ratio between the first distance and the second distance being between 3 to 1 (3:1) and 4 to 1 (4:1)
Dependencies are inferred from the claim text.