Patent ID: 8499903

Claim:
A suspension device comprising: a motion transforming mechanism for transforming a linear motion of a linear motion member into a rotational motion of a rotating member; a disc connected to said linear motion member; a first spring; a second spring; a motor connected to the rotating member in the motion transforming mechanism; an air spring, the air spring including a tubular air chamber connected to the motor, an air piston connected to the linear motion member, and a diaphragm interposed between the air chamber, the motor and the air piston, said tubular air chamber comprising a gas chamber, said air piston being tubular and having a diameter that is smaller than said air chamber; a first spring seat connected to said disc, said first spring being arranged between a lower end portion of said air piston and said first spring seat; a second spring seat connected to an inner surface of an upper end portion of said air piston; a third spring seat connected to said disc, said second spring being arranged between said second spring seat and said third spring seat; a stopper provided on an outer periphery of the air piston; and a stopper seat provided on an inner periphery of the air chamber so as to be put in abutment against said stopper upon maximum extension of the suspension device involving relative separation of the air chamber and the air piston with respect to each other.