Rotary vane steering gear

A rotary vane steering gear comprising

• a rotary vane hydraulic actuator that has a body divided into a movable part that creates the rotor and a stationary part that creates a stator where both parts together confine the internal hydraulic space in the shape of a toroid with a rotation axis (X-X), and
• a rudder stock placed in the rotation axis (X-X), wherein
• the body is divided by plane (A-A) that crosses a space perpendicularly to the rotation axis (X-X) and in case of a space of circular toroid shape—by plane (A-A) that crosses the space perpendicularly to the rotation axis (X-X) and a center point of a circle delimiting the space, into the rotor and the stator bound by two thrust rings and that are fastened concentrically on both opposite sides of hydraulic space each to the respective edge of one body part and that overlap the other body part radially, to create in conjunction with the both body parts two concentric slewing bearings that keep the rotor and the stator in one axial and radial position to each other and enable the rotor to rotate in relation to the stator around the rotation axis (X-X).