Patent ID: 8028813
Filing Date: 2011-10-04
Classification: F16F

Abstract:
1. A shock absorber comprising: a cylinder; a piston valve connected to a piston rod within the cylinder to divide the cylinder into a first chamber and a second chamber; a hollow chamber formed within the piston rod; a floating piston disposed within the hollow chamber to move up and down and to divide the hollow chamber into upper and lower chambers; first and second orifices formed in upper and lower ends of the hollow chamber and in fluid communication with the first and second chambers, respectively; and a resistance changing mechanism configured to cooperate with the floating piston and change a fluid resistance with respect to the floating piston, wherein the second orifice extends from an inlet at a side of the hollow chamber to an outlet at a side of the second chamber, the floating piston comprises a taper part formed to be inserted into the inlet of the second orifice and an insertion part formed under the taper part, and the resistance changing mechanism comprises a slant part formed at the inlet of the second orifice to have a decreasing cross-sectional area and having a shape corresponding to the taper part.