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Machine translation
1. (WO1980002129) SPROCKET WHEEL ASSEMBLY FOR A CHAIN TRANSMISSION IN PARTICULAR ADAPTED TO BICYCLES
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/002129    International Application No.:    PCT/NL1980/000013
Publication Date: 16.10.1980 International Filing Date: 10.04.1980
IPC:
B62M 9/08 (2006.01)
Applicants:
Inventors:
Priority Data:
7902814 10.04.1979 NL
Title (EN) SPROCKET WHEEL ASSEMBLY FOR A CHAIN TRANSMISSION IN PARTICULAR ADAPTED TO BICYCLES
(FR) ROUE POUR TRANSMISSION PAR CHAINE EN PARTICULIER POUR DES BICYCLETTES
Abstract: front page image
(EN)An improved sprocket wheel assembly for a chain transmission in particular adapted to bicycles, comprising a plurality of chain engaging means (5, 6) mounted in angularly spaced apart relation and for a radial displacement on a wheel (1), spring means (12) being provided for biasing simultaneously said chain engaging means outwardly, while at least two diametrically opposed chain engaging means are formed by a sprocket pinion (6) mounted for rotation but means being provided for blocking said rotation in at least one rotational direction, the improvement comprising two diametrically opposed sprocket pinions (6) coaxially connected with a toothed wheel (7) for a joint rotation, and radial displacement, each toothed wheel (7) being in engagement with a radially extending rack (8) fixedly mounted to said wheel (1), so that in displacing radially of said two toothed wheels the sprocket pinions are rotated in opposite rotational directions.
(FR)Roue pour transmission a chaine adaptee en particulier aux bicyclettes, comprenant une pluralite de moyens d"engagement de chaine (5, 6) montes en relation d"espacement angulaire entre eux et pour un deplacement radial sur une roue (1), des ressorts (12) etant prevus pour rappeler simultanement cesdits moyens d"engagement de chaine vers l"exterieur, tandis qu"au moins deux moyens d"engagement de chaine diametralement opposes sont formes par un pignon de Gall (6) monte en rotation mais des moyens sont prevus pour bloquer cette rotation au moins dans un sens, l"amelioration consistant en deux pignons de Gall diametriquement opposes relies coaxialement avec une roue dentee (7) pour une rotation conjointe, chaque roue dentee (7) cooperant avec une cremaillere s"etendant radialement (8) assujettie sur ladite roue (1) afin que, lors du deplacement radial des deux roues dentees, les pignons de Gall soient mis en rotation en sens opposes.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)