Hydrostatic pump e.g. two-stroke vane pump for automatic transmission of motor vehicle, has breakthroughs with partition wall that is arranged between first and second rotors

摘要

The pump (1) has first and second rotors (2,4), shaft (3), stationary cam rings (6,7) and rotor displacement chambers. The displacement chambers are divided in the axial direction into first and second pressure chambers. The breakthroughs (11,12) with a partition wall (10) is arranged between the first and second rotors. The first and second pressure chambers communicate by the breakthroughs. An independent claim is included for automatic transmission.