Device for a bicycle provided with chain wheels and sprockets
OwnerFranck Jean Savardinventor
Life of this patent
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Abstract
A device (10) for a bicycle provided with chain wheels (14) and sprockets (16), a chain stretched between the chain wheels (14) and sprockets (16), and a rear derailleur (DR), the device (10) including a housing (20) containing: chain wheel (14) shifting elements (26) that include direct control of a fork (42) and form a front derailleur (DA); elements (28) for shifting the sprockets (16) via the rear derailleur (DR); and elements (30) for controlling the chain wheel (14) shifting elements (26) and the sprocket (16) shifting elements (23).
Claims20
Single device for shifting gears on a bicycle equipped with chain wheels (14) and sprockets (16), a chain (12) stretched between these chain wheels and sprockets as well as a rear derailleur DR, said single device for shifting gears comprising a single case (20) incorporating:
- means (26) for changing wheel chains with direct control of a fork (42), forming front derailleur DA, means (28) for changing sprockets via the rear derailleur DR, and
- means (30) for control of said means (26) for changing chain wheels and of said means (28) for changing sprockets.
Dependencies are inferred from the claim text.