US Patent 11912170 Angular adjustment device for a vehicle seat

A hinge comprising a first and a second plate intended to be connected respectively to a first and to a second vehicle seat element, the first plate comprising a base toothed portion with N teeth, a plurality of sets of rolling elements, each radially movable between at least one locking position, in which the rolling element is at least partially engaged in a space between two teeth, and an unlocking position in which the rolling element is disengaged from the space, a plurality of movable cams, each cooperating with the rolling elements of a different set, so as to cause the rolling elements to transition from their unlocking position to a locking position, and vice versa, and a control hub, able to move the cams.