The present invention relates to a rotary engine comprising a stator, a first rotor rotatably mounted on the stator about a rotational axis of the first rotor, and a second rotor rotatably mounted on the stator about a rotational axis of the second rotor parallel to the rotational axis of the first rotor such that the second rotor is eccentrically mounted to and surrounding the first rotor, wherein the first rotor comprises a first cylinder with a piston chamber limited by a translationally displaceable first piston with a first rod fixed to an outer side of the second rotor on an end of the first rod outwardly projecting from the first cylinder towards the outer side of the second rotor and fixed to the first piston on the other end of the first rod, wherein the first rotor further comprises at least one second cylinder, each of the at least one second cylinder comprising a piston chamber limited by a translationally displaceable second piston with a second rod coupled to an outer side of the second rotor on an end of the corresponding second rod outwardly projecting from the respective second cylinder towards the outer side of the second rotor and fixed to the corresponding second piston on the other end of the corresponding second rod, and wherein the end of each second rod coupled to the outer side of the second rotor is supported such that the end is rotationally displaceable along a limited curved guide path within the second rotor.

A radial piston motor comprises cylinder-piston units arranged in a star shape, a housing, an output shaft, an inner axial housing collar, an outer axial shaft collar, an output flange, an output shaft, and a brake positioned at least in certain sections between the inner axial housing collar and the outer axial shaft collar. The output flange is attached to the output shaft. The output flange is attached to the shaft collar radially outside the shaft collar.

The present invention relates to a rotary engine comprising a stator, a first rotor rotatably mounted on the stator about a rotational axis of the first rotor, and a second rotor rotatably mounted on the stator about a rotational axis of the second rotor parallel to the rotational axis of the first rotor such that the second rotor is eccentrically mounted to and surrounding the first rotor, wherein the first rotor comprises a first cylinder with a piston chamber limited by a translationally displaceable first piston with a first rod fixed to an outer side of the second rotor on an end of the first rod outwardly projecting from the first cylinder towards the outer side of the second rotor and fixed to the first piston on the other end of the first rod, wherein the first rotor further comprises at least one second cylinder, each of the at least one second cylinder comprising a piston chamber limited by a translationally displaceable second piston with a second rod coupled to an outer side of the second rotor on an end of the corresponding second rod outwardly projecting from the respective second cylinder towards the outer side of the second rotor and fixed to the corresponding second piston on the other end of the corresponding second rod, and wherein the end of each second rod coupled to the outer side of the second rotor is supported such that the end is rotationally displaceable along a limited curved guide path within the second rotor.

A bearing device includes a piston arranged in a cylinder of a rotor, and a half bearing mounted on the piston to support a roller. The piston includes a recessed holding surface, and holding side surfaces on both axial sides thereof. Each holding side surface includes a ridge portion having an arc-shaped or elliptic-arc-shaped profile protruding toward a radially inner side of the piston. The half bearing includes a partially cylindrical portion, and protruding portions protruding from axial end faces thereof. Each protruding portion has a protruding portion end face which includes a central recessed surface, and two support recessed surfaces located on both circumferential sides thereof, that have an arc shape or an elliptic arc shape to correspond to the profile of the ridge portion, so that only the two support recessed surfaces are in contact with the ridge portion.

A bearing device includes a piston arranged in a cylinder of a rotor, and a half bearing mounted on the piston to support a roller. The piston includes a recessed holding surface, and holding side surfaces on both axial sides thereof. Each holding side surface includes a ridge portion having an arc-shaped or elliptic-arc-shaped profile protruding toward a radially inner side of the piston. The half bearing includes a partially cylindrical portion, and protruding portions at a circumferential center thereof. Each protruding portion has a protruding portion end face which includes a central recessed surface, and two support recessed surfaces located on both circumferential sides thereof, that have an arc shape or an elliptic arc shape to correspond to the profile of the ridge portion, so that only the two support recessed surfaces are in contact with the ridge portion.

A hydrostatic machine comprising a stator and a rotor. The stator comprises an inner cylindrical surface with a constant diameter and a cam ring comprising a cam track on the inner circumference thereof, the outer circumference of the cam ring being mounted in the aforementioned inner cylindrical surface. The hydrostatic machine also comprises two bearings that allow the rotation of the rotor in relation to the stator and that are mounted on the inner cylindrical surface of the stator, axially on either side of the cam ring, the cam ring and the two bearings having the same outer diameter.

A hydrostatic machine comprising a stator and a rotor. The stator comprises an inner cylindrical surface with a constant diameter and a cam ring comprising a cam track on the inner circumference thereof, the outer circumference of the cam ring being mounted in the aforementioned inner cylindrical surface. The hydrostatic machine also comprises two bearings that allow the rotation of the rotor in relation to the stator and that are mounted on the inner cylindrical surface of the stator, axially on either side of the cam ring, the cam ring and the two bearings having the same outer diameter.

A hydrostatic machine comprising a stator and a rotor. The stator comprises an inner cylindrical surface with a constant diameter and a cam ring comprising a cam track on the inner circumference thereof, the outer circumference of the cam ring being mounted in the aforementioned inner cylindrical surface. The hydrostatic machine also comprises two bearings that allow the rotation of the rotor in relation to the stator and that are mounted on the inner cylindrical surface of the stator, axially on either side of the cam ring, the cam ring and the two bearings having the same outer diameter.

A bearing device includes a piston arranged in a cylinder of a rotor, and a half bearing mounted on the piston to support a roller. The piston includes a recessed holding surface, and holding side surfaces on both axial sides thereof. Each holding side surface includes a ridge portion having an arc-shaped or elliptic-arc-shaped profile protruding toward a radially inner side of the piston. The half bearing includes a partially cylindrical portion, and protruding portions protruding from axial end faces thereof. Each protruding portion has a protruding portion end face which includes a central recessed surface, and two support recessed surfaces located on both circumferential sides thereof, that have an arc shape or an elliptic arc shape to correspond to the profile of the ridge portion, so that only the two support recessed surfaces are in contact with the ridge portion.

A bearing device includes a piston arranged in a cylinder of a rotor, and a half bearing mounted on the piston to support a roller. The piston includes a recessed holding surface, and holding side surfaces on both axial sides thereof. Each holding side surface includes a ridge portion having an arc-shaped or elliptic-arc-shaped profile protruding toward a radially inner side of the piston. The half bearing includes a partially cylindrical portion, and protruding portions at a circumferential center thereof. Each protruding portion has a protruding portion end face which includes a central recessed surface, and two support recessed surfaces located on both circumferential sides thereof, that have an arc shape or an elliptic arc shape to correspond to the profile of the ridge portion, so that only the two support recessed surfaces are in contact with the ridge portion.