Patent ID: 8419130

Claim:
Seat tilt apparatus fir an electric wheelchair, which wheelchair comprises a chassis and a seat, the seat tilt apparatus comprising; a base member, which is fixable to the chassis and provided with at least one first guide slot; a seat supporting member which is arranged to supportably receive the seat, movable in relation to the base member and guided by the first guide slot; a linear drive means which is connected to the base member and to the seat supporting member, for moving the seat supporting member along a motion path, in relation to the base member; characterized in that the seat supporting member comprises at least one first cam surface facing in a first direction and at least one second cam surface facing in a second direction, which is opposite to said first direction; and the base member comprises at least one first rotational support member and at least one second rotational support member, said first cam surface being arranged to be in supporting contact with said first rotational support member and formed for altering the angle between the seat supporting member and the base member during movement along a first interval of said motion path and said second cam surface being arranged to be in supporting contact with said second rotational support member and formed for altering the angle between the seat supporting member and the base member during movement along a second interval of said motion path.