B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
B62M9/04—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
Dispositif pour fixer une selle et la positionner de maniere a la rendre mobile par rapport au cadre d'une bicyclette, tige de selle, potence et bicyclette equipees d'un tel dispositif