Patent ID: 7441638

Claim:
A front fork interposed between a vehicle body and an axle to restrain a change in vehicle attitude, comprising: an expandable and contractable fork body including a reservoir chamber partially filled with gas; a reservoir tank partially filled with gas and communicating with the reservoir chamber through a flow path in which hydraulic oil flows; an on-off valve blocking the flow path when the vehicle is in a braking operation; a relief valve that accepts a flow of hydraulic oil from the reservoir chamber toward the reservoir tank when a pressure of the reservoir chamber reaches a predetermined pressure by contraction of the fork body in the braking operation in a state of the on-off valve blocking the flow path; and a check valve that accepts only a flow of hydraulic oil from the reservoir tank toward the reservoir chamber when the pressure of the reservoir chamber becomes lower than the pressure of the reservoir tank by shifting from a contraction operation to an expansion operation of the fork body in the state of the on-off valve blocking the flow path.