A hysteresis clutch including a first rotor with magnets that are polarized in opposite directions in pairs in a circumferential direction and between which pole pieces are provided for deflecting the magnetic flux in the radial direction and a second rotor of the hysteresis clutch has a series of second permanent magnets that extend in the circumferential direction and which are arranged on a circle that is concentric to the rotational axis A, the number of the first magnets and the number of the second magnet are configured such that a smooth torque curve is achieved which is free of a detent torque or at least has a low detent torque.

A magnetic coupling device (1) is provided for coupling a first member (10) and a second member (11), coaxial with each other, so that they can jointly rotate about a common axis and/or translate along such axis or can perform relative rotary and/or translatory movements depending on the intensity of a torque or an axial force applied to one of the members. At least one of the members (10) has axially extending magnetized areas (12) each consisting of a row of axially aligned magnets (12′), the magnets (12′) in one area (12i) being axially offset relative to the magnets of an adjacent area (12j).

A hysteresis clutch including a first rotor with magnets that are polarized in opposite directions in pairs in a circumferential direction and between which pole pieces are provided for deflecting the magnetic flux in the radial direction and a second rotor of the hysteresis clutch has a series of second permanent magnets that extend in the circumferential direction and which are arranged on a circle that is concentric to the rotational axis A, the number of the first magnets and the number of the second magnet are configured such that a smooth torque curve is achieved which is free of a detent torque or at least has a low detent torque.

In one aspect, a system for controlling the position of an agricultural implement being towed by an agricultural vehicle may include first and second wheels and first and second non-contact-based braking devices. As such, the first braking device may be configured to apply a braking force to the first wheel, and the second braking device may be configured to apply a braking force to the second wheel. Furthermore, the system may include a controller configured to control an operation of the first braking device or the second braking device when it is determined that the position of the implement differs from a predetermined position for the implement such that the braking force is applied to the corresponding wheel in a manner that adjusts the position of the implement towards the predetermined position.

A magnetic type rotation transmitting mechanism has a rotating plate made of a magnetic material, and a magnet to which the rotational movement of the rotating plate is transmitted through a magnetic coupling between the magnet and the rotating plate. When the rotating plate is rotated, a plurality of oblique edge portions formed on the outer peripheral edge of the rotating plate rotate while sequentially passing through a magnet-facing area. The oblique edge portions move in the direction of the rotation centerline of the rotating plate, the rotation centerline being perpendicular to the center axis line of the magnet. The magnet is rotated about the center axis line by a magnetic force occurring between the magnet and the oblique edge portions passing through the magnet-facing area. It is possible to realize a small and compact mechanism for extracting rotation.

A dynamically induced magnetic hysteresis apparatus is described which allows efficient adjustable power coupling without direct mechanical attachment or linking. Adjustment of spatial and penetration gaps are adjusted to vary the ratio of rotation.

A magnetic coupling device (1) is provided for coupling a first member (10) and a second member (11), coaxial with each other, so that they can jointly rotate about a common axis and/or translate along such axis or can perform relative rotary and/or translatory movements depending on the intensity of a torque or an axial force applied to one of the members. At least one of the members (10) has axially extending magnetised areas (12) each consisting of a row of axially aligned magnets (12), the magnets (12) in one area (12i) being axially offset relative to the magnets of an adjacent area (12j).

In one aspect, a system for controlling the position of an agricultural implement being towed by an agricultural vehicle may include first and second wheels and first and second non-contact-based braking devices. As such, the first braking device may be configured to apply a braking force to the first wheel, and the second braking device may be configured to apply a braking force to the second wheel. Furthermore, the system may include a controller configured to control an operation of the first braking device or the second braking device when it is determined that the position of the implement differs from a predetermined position for the implement such that the braking force is applied to the corresponding wheel in a manner that adjusts the position of the implement towards the predetermined position.

A frictionless safety brake actuator, for use in an elevator system, includes at least two stators; a magnet array positioned between the stators; a linkage attached to the magnet array; and a biasing arrangement. The linkage is actuatable to move a safety brake into frictional engagement with an elevator guide rail. The magnet array is moveable between a first position in which the linkage is actuated and a second position in which the linkage is not actuated. The biasing arrangement is arranged to bias the magnet array towards the first position. The magnet array includes a first magnet set and a second magnet set which comprise at least one magnet each and at least three magnets in total. The magnet(s) of the first magnet set is/are arranged alternately with the magnet(s) of the second magnet set in a stack.

A frictionless safety brake actuator, for use in an elevator system, includes at least two stators; a magnet array positioned between the stators; a linkage attached to the magnet array; and a biasing arrangement. The linkage is actuatable to move a safety brake into frictional engagement with an elevator guide rail. The magnet array is moveable between a first position in which the linkage is actuated and a second position in which the linkage is not actuated. The biasing arrangement is arranged to bias the magnet array towards the first position. The magnet array includes a first magnet set and a second magnet set which comprise at least one magnet each and at least three magnets in total. The magnet(s) of the first magnet set is/are arranged alternately with the magnet(s) of the second magnet set in a stack.