A friction clutch having an electromagnet assembly including a coil and a magnet connected to the coil. When the coil is energised, a magnetic field is generated and passes through the magnet and a magnetisable conductive body adjacent to the magnet, such that a displaceable magnetisable armature portion can be brought from one position into another position. The coil has a plurality of outer portions each having an associated outer dimension of the outer portion. The magnet completely covers an outer portion of the coil by a magnet side. Two further outer portions of the coil are not covered by the magnet or are not covered by more than 20% of an outer dimension of the further outer portion, or wherein, in the case a single further outer portion covered by the magnet, the outer portion is not covered by more than 70%.

A compressor assembly (10) for supplying pressure medium to a tire cavity (7) of a tire of a vehicle wheel, which can be mounted on a wheel hub (4) that is mounted on a wheel carrier (3) for rotation about an axis of rotation (32). The compressor assembly (10) includes a hub-side compression chamber (16) and a compressor component (18). A pressure medium is conducted into the tire cavity (7) upon being pressurized in the compression chamber (16) by oscillating translational motion of the compressor component (18). The compressor assembly (10) includes a transmission (20) that converts a rotational motion between the wheel carrier side and the wheel hub side into an oscillating translational motion of the compressor component (18) when a hub-side transmission part (24) is in an operating position with a wheel-carrier-side transmission part (26).

An axially oriented, two-position linear actuator includes a fixed stator having a single stator coil and a linear movable translator. The linear actuator is oriented axially in that the stator and the translator are axially offset from one another and the translator is axially movable between first and second end positions toward and away from the stator. For the translator to move between the end positions, the stator coil attracts or repels the translator depending on the polarity of the electrical current of the stator coil. The linear actuator may be part of a clutch assembly, such as a dynamically controllable clutch, for use in controlling coupling members of the clutch assembly.

An armature is configured to come into contact with an actuator due to magnetic attraction force. An outer plate is fixed to an armature, the outer plate being located on an opposite side of the armature from the actuator, the outer plate being configured to rotate together with the armature. An inner hub is located between the armature and the outer plate to be movable in a direction along a rotation axis, the inner hub being fixed to a driven device. A rubber member is disposed between the inner hub and the outer plate to give an urging force to the inner hub and the outer plate in a direction away from each other. This electromagnetic clutch is configured such that the urging force of the rubber member non-linearly increases as the actuator and the armature approach each other due to the magnetic attraction force.

A compressor assembly (10) for supplying pressure medium to a tire cavity (7) of a tire of a vehicle wheel, which can be mounted on a wheel hub (4) that is mounted on a wheel carrier (3) for rotation about an axis of rotation (32). The compressor assembly (10) includes a hub-side compression chamber (16) and a compressor component (18). A pressure medium is conducted into the tire cavity (7) upon being pressurized in the compression chamber (16) by oscillating translational motion of the compressor component (18). The compressor assembly (10) includes a transmission (20) that converts a rotational motion between the wheel carrier side and the wheel hub side into an oscillating translational motion of the compressor component (18) when a hub-side transmission part (24) is in an operating position with a wheel-carrier-side transmission part (26).

The present invention relates to a lifting apparatus for a pressure paddle, the lifting apparatus for the pressure paddle comprising: a lifting belt rotated by a driving means; a lifting pulley manually rotated by the lifting belt hung thereon; a lifting frame on which the lifting pulley is mounted; and a pressure paddle mounted on the lifting frame.

The present invention relates to a lifting apparatus for a pressure paddle, the lifting apparatus for the pressure paddle comprising: a lifting belt rotated by a driving means; a lifting pulley manually rotated by the lifting belt hung thereon; a lifting frame on which the lifting pulley is mounted; and a pressure paddle mounted on the lifting frame.

A device (10) for providing air under pressure to a rotating pneumatic tire is disclosed. The device comprises a pump (48, 50, 58) which in use rotates with the tire and which provides air under pressure to the tire when the pump is activated. There is a pump drive system for activating the pump upon a loss of pressure in the tire. The pump drive system includes a connecting rod (52) which is rotationally connected to the tire and an eccentric body (32) which rotates with the rod when the pump is inactive. The eccentric body is inhibited from rotating with the rod to activate the pump. Relative rotation between the rod and the eccentric body drives the pump to provide air under pressure to the tire. An electromagnetic clutch is provided which has a first plate (26) which is non-rotatable and a second plate (36) which rotates with the body. The first plate is connected to the second plate electromagnetically when the clutch is engaged to prevent rotation of the second plate and hence of the connecting rod.

A device (10) for providing air under pressure to a rotating pneumatic tire is disclosed. The device comprises a pump (48, 50, 58) which in use rotates with the tire and which provides air under pressure to the tire when the pump is activated. There is a pump drive system for activating the pump upon a loss of pressure in the tire. The pump drive system includes a connecting rod (52) which is rotationally connected to the tire and an eccentric body (32) which rotates with the rod when the pump is inactive. The eccentric body is inhibited from rotating with the rod to activate the pump. Relative rotation between the rod and the eccentric body drives the pump to provide air under pressure to the tire. An electromagnetic clutch is provided which has a first plate (26) which is non-rotatable and a second plate (36) which rotates with the body. The first plate is connected to the second plate electromagnetically when the clutch is engaged to prevent rotation of the second plate and hence of the connecting rod.

The invention describes a switchable clutch for a motor vehicle with hybrid drive, wherein the hybrid drive has a voltage system with a voltage exceeding the 12-volt on-board electrical system voltage of the motor vehicle, composed of a friction disk clutch with an actuator, which can have electricity applied to it, for the actuation of the friction disk clutch in the sense of opening or closing, and wherein the actuator can be actuated with a voltage of the voltage system of the hybrid drive, said voltage exceeding the 12-volt on-board electrical system voltage of the motor vehicle.