Patent ID: 9656525
Date: 2017-05-23
CPC Classifications: B60D,E01C

Claim:
1. A road finishing machine comprising: a chassis; and a pushing device comprising a docking assembly and an absorber unit, the absorber unit being fixed to the chassis and comprising a piston-cylinder unit, the piston-cylinder unit comprising a cylinder and a working piston that is movable in the cylinder and that divides a chamber of the piston-cylinder unit into a first chamber and a second chamber, wherein the docking assembly is coupled to the working piston and may be positioned relative to the chassis between an extended position and a retracted position by the working piston, wherein the piston-cylinder unit further comprises at least one flow channel disposed in the working piston and provided between the first and second chambers for allowing a fluid enclosed in the piston-cylinder unit to pass through the at least one flow channel, the fluid being prestressed when the docking assembly is in the extended position, wherein the pushing device further comprises at least one one-way valve provided in the working piston for allowing the fluid enclosed in the piston-cylinder unit to pass through the at least one one-way valve when the working piston pushes toward the retracted position, and wherein the at least one one-way valve is configured to allow more of the fluid to pass than the at least one flow channel when the working piston pushes toward the retracted position.