Patent ID: 7201079

Claim:
A rotary actuator for an adjuster of a vehicle seat, the rotary actuator comprising: an operating element for being manually set into motion; an output element for rotationally driving the adjuster; and a transmission gearing operatively positioned between the operating element and the output element for at least intermittently rotatably driving the output element in response to the operating element being in motion, wherein the transmission gearing is configured for operating through two phases while rotatably driving the output element in response to the operating element being in motion, the operating of the transmission gearing through the two phases includes the transmission gearing changing from a higher constant transmission ratio to a lower constant transmission ratio, the transmission gearing is configured, throughout a first of the two phases, for driving the output element at the higher constant transmission ratio in response to the operating element being in motion, and the transmission gearing is configured, throughout a second of the two phases, for driving the output element at the lower constant transmission ratio in response to the operating element being in motion.