Patent ID: 8286761

Claim:
A shock absorber for a transportation means comprising: a sleeve with an operation area; a piston cap, a rod, a rod cap with a rod seal for sealing the rod, a piston with a piston seal; the operation area of the sleeve includes a sleeve area jointed to the piston cap and a sleeve area jointed to the rod cap; the rod includes a rod area jointed to an end free of the piston and a piston area of the rod, wherein the piston is made with a capability of longitudinal movement along the operation area of the sleeve, and the rod with the piston are made with a capability of join longitudinal movement in the sleeve; said shock absorber is different in that: the rod is made such that in the area jointed to the end being free of the piston, the rod surface along a length of the rod includes at least two regions, and on each of the regions along a direction from the piston to the end being free of the piston, an inner diameter of the rod along the length of the rod's region increases to a value of a maximal outer diameter on this region, and then decreases to a value of a minimal outer diameter on this region; and, on the region most proximate to the end being free from the piston, the maximal outer diameter of the rod is greater than the maximal outer diameter of the region most remote from the end being free of the piston; and, in the piston area of the rod, the rod surface, along the length of the area, includes at least two regions, each of the regions in a direction from the piston to the rod's end being free of the piston, an inner diameter of the rod, along the length of the region, increases to a value of a maximal outer diameter of the rod, and then decreases to a value of a minimal outer diameter of the rod on this region; and, on the region, most proximate to the piston, the maximal outer diameter of the rod is greater than the maximal outer diameter of the rod on the region most remote from the piston.