US Patent 7478708 Shock absorber

A shock absorber comprises first and second axially aligned cylinders (11, 21) each having a liquid filled prison chamber (12, 22), an axially displaceable piston (13, 23), received in the piston chamber (12, 22), and dampeners (14, 24) for dampening axial displacement of the piston (13, 23) through the liquid in the piston chamber (12, 22). A piston rod (1) axially extends between and into the first and second cylinder piston chambers (12, 22). The first and second axial ends (1a, 1b) of the piston rod (1) are connected to the first and second cylinder pistons (13, 23), respectively.