Patent ID: 7866253

Claim:
A pressure-medium actuated swivel motor comprising: a cylinder with closed ends and an inside surface with a pair of diametrically opposed axially extending ribs; a motor shaft with a pair of diametrically opposed axially extending vanes, said vanes and said ribs bounding first and second pairs of diametrically opposed working chambers between said motor shaft and said cylinder; a first pressure medium port connected to said first pair of working chambers, said first pair of working chambers being connected by a first interconnection channel through said shaft; a second pressure medium port connected to said second pair of working chambers, said second pair of working chambers being connected by a second interconnection channel through said shaft; and a pressure compensation element formed by a movable separating element which divides a compensating space into a first compensating subspace and a second compensating subspace, wherein said first compensating subspace is connected to said first pair of working chambers, and said second compensating subspace is connected to said second pair of working chambers, wherein the compensating space is connected to the interconnection channels.