Patent ID: 8616645

Claim:
A seat lifter device comprising: a seat support member; a front link including first and second ends, the first end being rotationally coupled to a front section of the seat support member; a rear link including first and second ends, the first end being rotationally coupled to a rear section of the seat support member; a frame member including a front section rotationally coupled to the second end of the front link and a rear section rotationally coupled to the second end of the rear link at a position rearward of the coupling portion between the seat support member and the rear link, wherein a seat back is supported at a rear end portion of the frame member; a cushion member including part of a seat cushion, the cushion member including a front section rotationally coupled to the frame member and a rear section rotationally coupled to the rear link at a position further separated from the coupling portion between the seat support member and the rear link than the coupling portion between the rear link and the frame member; and a rotation transmitting member for rotating one of the front link and the rear link.