Rear derailer for bicycle gears
AssigneeCampagnolo S.r.l.
InventorSandro Testa
Life of this patent
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Abstract
A rear derailleur for bicycle gears comprises an upper body which can be fixed to the bicycle frame, a lower body carrying a chain tensioning wheel for the bicycle chain and being movable relative to the upper body to bring the chain into selective engagement with a series of sprockets carried by the hub of the rear wheel of the bicycle, and a flexible cable for causing movement of the lower body. This lower body is carried by a control lever which is supported for rotation and axial sliding on a cylindrical guide element fixed to the upper body. Transmission device is interposed between the flexible cable and the control lever and is adapted simultaneously to impart rotation and axial sliding to the control lever, relative to the cylindrical guide element, as a result of operation of the flexible cable.
Claims12
A rear derailleur for bicycle gears, comprising:
- an upper body which can be fixed to the bicycle frame,
- a lower body carrying transmission means for the bicycle chain and connected to the upper body so as to be movable relative thereto to bring the chain into selective engagement with a series of sprockets carried by the hub of the rear wheel of the bicycle, and
- flexible cable means for causing movement of the lower body,
- wherein it further includes a cylindrical guide element fixed to the upper body, a control lever which carries the lower body and is supported for rotation and axial sliding on the cylindrical guide element, and transmission means interposed between the flexible cable means and the control lever for simulaneously imparting rotation and axial sliding to the control lever relative to the cylindrical guide element as a result of operation of the flexible cable means, means also being provided for keeping the orientation of the lower body unchanged as the position of the control lever varies.
Dependencies are inferred from the claim text.