Hydraulic device, has meshed gear wheels, which are provided with external helical gear, and control groove provided at front side of gear and periodically producing pressure compensated connection during rotation of gear wheels

摘要

The device has two meshed gear wheels (16, 18), which are provided with an external helical gear and are arranged between an inlet side and an outlet side. A control groove is provided at a front side of the gear and periodically produces a pressure compensated connection during rotation of the gear wheels. The control groove is completely covered by teeth (20) of the helical gear. The control groove stands in connection with the outlet side.