Asphalt finisher

Abstract

An asphalt finisher includes a screed configured to move in a construction direction and level a paving material; a screed extendible or contractible cylinder configured to extend or contract in accordance with supply of hydraulic oil, thereby moving a side frame that is a limit of leveling by the screed; a hydraulic pump configured to supply the hydraulic oil to the screed extendible or contractible cylinder; a switching valve configured to switch a supply target of the hydraulic oil; and a proportional valve configured to adjust a flow rate of the hydraulic oil. The switching valve and the proportional valve are provided in a path between the hydraulic pump and the screed extendible or contractible cylinder.

Dependencies are inferred from the claim text.