F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
F04B49/002—Hydraulic systems to change the pump delivery
Dispositif de pompe hydraulique basse pression pour l'alimentation d'au moins un moteur hydraulique, notamment destine a equiper une bicyclette a entrainement hydraulique