Abstract: A device and a method for foam analysis. The device comprises a cylindrical sample container with a transparent wall, at least one illumination device and a camera, which. can be moved on a track. The curvature of the web runs parallel to the wall of the container. The illumination device directs a light beam onto the wall of the cylindrical sample container at an angle which deflects the light beam into the sample vessel when liquid is present on the inside of the sample container and causes a total reflection when air or another gas fills the foam pores. The camera and the illumination unit are moved along the path in the circumferential direction of the wall of the sample container such that a region to be examined is illuminated in steps or in a continuous progression and the camera records the totally reflected light in the region.

Abstract: The disclosure relates to an actuator having a planetary roller screw drive comprising a housing having a cylinder chamber and a fluid reservoir forming one common volume and the housing is filled with a hydraulic fluid. The planetary roller screw drive comprises a spindle having a profiling, which meshes with a plurality of planetary rollers, which are arranged around the spindle and are supported at both ends in a planetary roller carrier. The planetary rollers mesh with an inner profiling of an internal ring gear surrounding the planetary rollers and the planetary rollers are supported in a sleeve surrounding the internal ring gear. According to the disclosure, the planetary roller carrier and/or the sleeve comprise one or more flow ducts connecting the interior and the exterior of a chamber defined radially by the sleeve and axially by the planetary roller carriers to one another.

Abstract: An actuator with a planetary screw drive (PSD), in particular to operate a clutch of a vehicle, wherein a centric spindle having a pitch is connected non-rotatingly to a rotor of a drive and is drivable by the drive around an axis of rotation, and a plurality of planetary rollers are engaged with the spindle and mesh with a ring gear encircling the planetary rollers which has grooves in the circumferential direction, wherein both ends of the planetary rollers are positioned in a planetary roller carrier. The planetary roller carriers are supported non-rotatingly on both ends in such a way that a fixed assignment of the pitch of the spindle to an axial travel of a component that is movable axially by the PSD, which is operatively connected to an axially actuatable piston, is realized.

Abstract: An actuator having a planetary screw drive (PSD), in particular for the operation of a clutch of a motor vehicle, wherein a plurality of planetary rollers which mesh with a ring gear that encircles the planetary rollers are in contact with a spindle, where the planetary rollers are positioned at both ends in a planetary roller carrier and the planet carriers are supported non-rotatingly in a sleeve that encircles the ring gear and points radially inward at both ends, wherein the sleeve and the planetary carriers supported in it are axially fixed and connected non-rotatingly to a rotor of a drive and are drivable around an axis of rotation, the spindle is supported non-rotatingly and the spindle performs an axial stroke when the rotor and the planetary carriers supported in the sleeve rotate, is provided.

Abstract: A device and a method for foam analysis. The device comprises a cylindrical sample container with a transparent wall, at least one illumination device and a camera, which. can be moved on a track. The curvature of the web runs parallel to the wall of the container. The illumination device directs a light beam onto the wall of the cylindrical sample container at an angle which deflects the light beam into the sample vessel when liquid is present on the inside of the sample container and causes a total reflection when air or another gas fills the foam pores. The camera and the illumination unit are moved along the path in the circumferential direction of the wall of the sample container such that a region to be examined is illuminated in steps or in a continuous progression and the camera records the totally reflected light in the region.

Abstract: Embodiments of the present invention relate to a component group with a friction device with at least two components that are rotatable relative to one another, in particular for actuating a clutch of a vehicle, wherein a coil spring influencing the degree of efficiency, the friction is disposed between the components that are rotatable relative to one another and wherein the component group with a friction device is integrated in a transmission or an actuator, or both.

Abstract: The disclosure relates to an actuator having a planetary roller screw drive comprising a housing having a cylinder chamber and a fluid reservoir forming one common volume and the housing is filled with a hydraulic fluid. The planetary roller screw drive comprises a spindle having a profiling, which meshes with a plurality of planetary rollers, which are arranged around the spindle and are supported at both ends in a planetary roller carrier. The planetary rollers mesh with an inner profiling of an internal ring gear surrounding the planetary rollers and the planetary rollers are supported in a sleeve surrounding the internal ring gear. According to the disclosure, the planetary roller carrier and/or the sleeve comprise one or more flow ducts connecting the interior and the exterior of a chamber defined radially by the sleeve and axially by the planetary roller carriers to one another.

Abstract: A spindle drive unit, in particular for an actuator having a planetary screw drive (PWG) for actuating a clutch of a motor vehicle by an actuating element is provided, where the drive unit has an e-motor with a rotor and a stator and where a spindle provided with a pitch is connected non-rotatingly to the rotor and is drivable by the rotor around an axis of rotation. The spindle is designed as a threaded rod and a rotor carrier that holds the rotor is screwed onto the threaded rod, and the rotor carrier is rotationally secured and axially fixed on the spindle by a lock nut.

Abstract: Embodiments of the present invention provide a memristor having a first electrode, a second electrode and a memristive layer arranged between the first electrode and the second electrode. Thereby, the memristor is adapted to obtain an asymmetrical current density distribution in the memristive layer.

Abstract: A modular concept is proposed for an actuator, in particular a clutch and/or transmission actuator. An electric motor is provided with a universal flange. Through this flange it is possible to connect an electrohydraulic or electromechanical actuating link. A clutch and/or a transmission setting device can then be actuated by means of the resulting actuator. In particular, for use for an electrohydraulic actuator, the motor housing may also have a receptacle for a pressure sensor. This receptacle may already be closed, or may be closed for the connection to a mechanics module.

Abstract: An actuator having a planetary screw drive (PSD), in particular for the operation of a clutch of a motor vehicle, wherein a plurality of planetary rollers which mesh with a ring gear that encircles the planetary rollers are in contact with a spindle, where the planetary rollers are positioned at both ends in a planetary roller carrier and the planet carriers are supported non-rotatingly in a sleeve that encircles the ring gear and points radially inward at both ends, wherein the sleeve and the planetary carriers supported in it are axially fixed and connected non-rotatingly to a rotor of a drive and are drivable around an axis of rotation, the spindle is supported non-rotatingly and the spindle performs an axial stroke when the rotor and the planetary carriers supported in the sleeve rotate, is provided.

Abstract: An actuator with a planetary screw drive (PSD), in particular to operate a clutch of a vehicle, wherein a centric spindle having a pitch is connected non-rotatingly to a rotor of a drive and is drivable by the drive around an axis of rotation, and a plurality of planetary rollers are engaged with the spindle and mesh with a ring gear encircling the planetary rollers which has grooves in the circumferential direction, wherein both ends of the planetary rollers are positioned in a planetary roller carrier. The planetary roller carriers are supported non-rotatingly on both ends in such a way that a fixed assignment of the pitch of the spindle to an axial travel of a component that is movable axially by the PSD, which is operatively connected to an axially actuatable piston, is realized.

Abstract: A spindle drive unit, in particular for an actuator having a planetary screw drive (PWG) for actuating a clutch of a motor vehicle by an actuating element is provided, where the drive unit has an e-motor with a rotor and a stator and where a spindle provided with a pitch is connected non-rotatingly to the rotor and is drivable by the rotor around an axis of rotation. The spindle is designed as a threaded rod and a rotor carrier that holds the rotor is screwed onto the threaded rod, and the rotor carrier is rotationally secured and axially fixed on the spindle by a lock nut.

Abstract: An actuation device especially for actuating a transmission for selecting a gear step and engaging and disengaging the selected gear step and/or for actuating at least one clutch. The actuation device includes at least one rotatable roll element that has guide tracks, into each of which a contact element of a selector fork engages to move the selector fork in order to select and engage or disengage a gear step of a transmission, and an actuation region for a clutch actuation means for actuating the at least one clutch.

Abstract: An actuator for actuating a transmission to select a transmission ratio and to engage or disengage the selected transmission ratio and/or for actuating at least one clutch, with a cylindrical control element on which a first ring element for controlling the clutch, a second ring element as a drive element, a third ring element for shift control, and a fourth ring element for shift operation are disposed for rotation, wherein the first ring element is connected to a clutch for actuating the clutch upon a rotation of the first ring element, the second ring element is connected to a drive for rotating the second ring element, the third ring element is provided with actuating means interacting with corresponding actuating means of the first, second, and fourth ring element, and wherein the fourth ring element is connected to shifting elements of a transmission for shifting a transmission ratio.

Abstract: Embodiments of the present invention relate to a component group with a friction device with at least two components that are rotatable relative to one another, in particular for actuating a clutch of a vehicle, wherein a coil spring influencing the degree of efficiency, the friction is disposed between the components that are rotatable relative to one another and wherein the component group with a friction device is integrated in a transmission or an actuator, or both.

Abstract: The subject matter of this invention is a device for measuring the contact angle of a liquid drop on a material surface. The shadow of a drop of a test liquid is projected onto a tilted shadow surface. An image of the drop on the shadow surface is recorded with an image recording device, and the contact angle is calculated from the image and the known angle of tilt of the shadow surface. A method that is suitable for this is likewise disclosed.

Abstract: Embodiments of the present invention provide a memristor having a first electrode, a second electrode and a memristive layer arranged between the first electrode and the second electrode. Thereby, the memristor is adapted to obtain an asymmetrical current density distribution in the memristive layer.

Abstract: The subject matter of this invention is a device for measuring the contact angle of a liquid drop on a material surface. The shadow of a drop of a test liquid is projected onto a tilted shadow surface. An image of the drop on the shadow surface is recorded with an image recording device, and the contact angle is calculated from the image and the known angle of tilt of the shadow surface. A method that is suitable for this is likewise disclosed.

Abstract: An actuation device especially for actuating a transmission for selecting a gear step and engaging and disengaging the selected gear step and/or for actuating at least one clutch. The actuation device includes at least one rotatable roll element that has guide tracks, into each of which a contact element of a selector fork engages to move the selector fork in order to select and engage or disengage a gear step of a transmission, and an actuation region for a clutch actuation means for actuating the at least one clutch.