US Patent 8047343 Flow damper for drawer

A flow damper used in an auto-close mechanism of a sliding rail assembly is disclosed to include a first flow cylinder that has coupling grooves provided at one lateral side, and a second flow cylinder that has coupling blocks provided at one side and connectable to the coupling grooves to secure the first and second flow cylinders in parallel in one of the first condition where the piston rods of the first and second flow cylinders extend in same direction and the second condition where the piston rods of the first and second flow cylinders extend in reversed directions.