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
B62M25/00—Actuators for gearing speed-change mechanisms specially adapted for cycles
Mecanisme d'entrainement d'un element mecanique, notamment un piston de pompe doseuse, le long d'un guide rectiligne et selon une course variable