Electromagnetic apparatus such as a clutch or a brake. (Machine-translation by Google Translate, not legally binding)

摘要

Electromagnetic apparatus such as a clutch or a brake, including, to transmit a pair between two elements of which at least one is rotating, a stack of friction discs alternately linked in rotation to each other of these elements and arranged between a stop ring and the mobile armature of an annular electromagnet, the stop ring and the yoke of the electromagnet being prevented from moving axially with respect to the two elements mentioned, while the armature can move axially relative to these, being such the assembly that, by exciting the electromagnet with a view to transmitting the torque, the movable armature is urged towards the stop ring compressing the stack of friction discs, characterized in that the disks are at least partly constituted , of magnetic material, so that they are crossed by the magnetic flux between the armature and the stop ring constituted of ma magnetically, and that the armature is arranged inside an annular extension of the cylinder head of the electromagnet so that there is no more than a small radial air gap between this movable armature and said annular extension, the assembly being such that the excitation of the electromagnet move axially away from the coil to the armature. (Machine-translation by Google Translate, not legally binding)