Patent ID: 7306285
Filing Date: 2007-12-11
Classification: B60N,Y10T

Abstract:
1. An adjuster for a vehicle seat, the adjuster comprising: a gear stage operatively associated with a geared fitting so that the geared fitting is driven in response to the gear stage being driven, and the geared fitting is operatively associated with a component for moving the component in response to the geared fitting being driven, whereby the geared fitting is operative between the gear stage and the component, and wherein the component is selected from the group consisting of a component of the adjuster, a component of the vehicle seat, and a component that is part of both the adjuster and the vehicle seat, the gear stage comprises an eccentric gear that has a fluctuating transmission ratio, the eccentric gear comprises a plurality of gearwheels that are configured for rotating through a plurality of full revolutions, the plurality of gearwheels includes a first gearwheel mounted for being rotated about a first axis of rotation, the first gearwheel's toothing geometry area has a center of gravity that is positioned offset with respect to the first axis of rotation, whereby the first gearwheel is eccentric, the geared fitting is adapted for being driven by a drive shaft mounted for being rotated about a second axis of rotation, the plurality of gearwheels includes a second gearwheel mounted on the drive shaft for rotating with the drive shaft about the second axis of rotation, the second gearwheel's toothing geometry area has a center of gravity that is positioned offset with respect to the second axis of rotation, whereby the second gearwheel is eccentric, the geared fitting is self-locking and has a fluctuating torque requirement, and the fluctuating transmission ratio of the eccentric gear is adapted to at least partially compensate for the fluctuating torque requirement of the geared fitting.