Hydrostatic piston machine

A hydrostatic piston machine comprising

• a guide member having an axis and a plurality of internal plane guide surfaces thereon, said guide surfaces being disposed tangentially of a common circle;
• a cylinder block mounted within said guide member about an axis eccentric to the axis of said common circle;
• a plurality of pistons movably mounted in the periphery of said block in a radiating pattern, each said piston having a foot at an outer end including a plane rectangular bearing surface guided along a respective one of said guide surfaces of said guide member, each said piston having an axis disposed perpendicularly of said respective guide surface;
• and
• a hydrostatic stabilizing means in said bearing surface of each said piston for maintaining said axis of each said piston perpendicularly of said respective guide surface during operation, said means including a hydrostatic bearing pocket concentric to said piston axis, a plurality of feed openings in corner zones of said bearing surface, a throttle passage communicating said pocket with an inner end face of said respective piston and a plurality of throttle passages for a flow of hydraulic pressure medium extending through a respective piston from said inner end face and terminating in said feed openings.