Abstract: An active aerostatic bearing comprises a first plate and a force actuator. The first plate has a central recess area including an orifice forming an inlet restrictor for pressurized air from a central nozzle. The pressurized air forms an air gap between a guiding surface and the first plate. The force actuator is configured to act to deform the first plate so as to change a shape of the air gap, wherein the actuator is configured to cause a conical deformation of the first plate.

Abstract: An aerostatic bearing includes a slider that is guidable on a guide surface. The slider has an inner, conical sliding surface of an inner air bearing facing the guide surface with a central compressed air supply. The conical sliding surface is attached by first joints to the central compressed air supply and by second joints to a base of the slider arranged on a side of the slider facing away from the guide surface, such that a cone angle of the conical sliding surface is variable. The conical sliding surface is surrounded by an annular sliding surface of an outer air bearing having an annular compressed air supply.

Abstract: An active aerostatic bearing comprises a first plate and a force actuator. The first plate has a central recess area including an orifice forming an inlet restrictor for pressurized air from a central nozzle. The pressurized air forms an air gap between a guiding surface and the first plate. The force actuator is configured to act to deform the first plate so as to change a shape of the air gap, wherein the actuator is configured to cause a conical deformation of the first plate.

Abstract: An aerostatic bearing includes a slider that is guidable on a guide surface. The slider has an inner, conical sliding surface of an inner air bearing facing the guide surface with a central compressed air supply. The conical sliding surface is attached by first joints to the central compressed air supply and by second joints to a base of the slider arranged on a side of the slider facing away from the guide surface, such that a cone angle of the conical sliding surface is variable. The conical sliding surface is surrounded by an annular sliding surface of an outer air bearing having an annular compressed air supply.

Abstract: A positioning device in a gantry type of construction includes two linear guides that are arranged parallel to each other on a base and support a first cross member and a second cross member in a manner allowing movement in a first direction. A carriage having a functional element is supported on the first cross member in a manner allowing movement in a second direction. Position-measuring devices for measuring the position of the carriage relative to the second cross member are disposed on the carriage and on the second cross member.

Abstract: A positioning device in a gantry type of construction includes two linear guides that are arranged parallel to each other on a base and support a first cross member and a second cross member in a manner allowing movement in a first direction. A carriage having a functional element is supported on the first cross member in a manner allowing movement in a second direction. Position-measuring devices for measuring the position of the carriage relative to the second cross member are disposed on the carriage and on the second cross member.