Hydraulic pump i.e. rotary piston pump, for gear box of bicycle-like multi-track car, has pistons for abutting at opposite portions of control body, and stopper portions for projecting from base plate of carriage towards shaft

摘要

The pump (40) has a housing provided with a suction opening (45) and a pressure port (46), where the suction opening receives hydraulic fluid. Promotion chambers open to an inner surface of the housing and are rotatably stored in the housing. The promotion chambers are limited by sliding pistons and a rotor is formed as a rotor disk that is firmly connected with a shaft (36). The pistons abut at opposite portions of a control body, and stopper portions (65-68) project from a base plate of a carriage towards the shaft. The base plate comprises an oblong hole-like aperture (69). An independent claim is also included for a muscle-operable vehicle comprising wheels.