Patent ID: 9062734
Filing Date: 2015-06-23
Classification: F16F

Abstract:
1. A shock absorber comprising: a cylinder in which a working fluid is sealed therein; a piston slidably fitted into the cylinder and configured to partition an inside of the cylinder into two chambers; a piston rod having one end connected to the piston and the other end extending to an outside of the cylinder; a sealing member configured to come in sliding contact with the piston rod and prevent leakage of the working fluid to the outside of the cylinder; a first passage and a second passage configured to flow the working fluid out of one chamber in the cylinder by movement of the piston; a first damping force generation mechanism installed at the first passage and configured to generate a damping force; a housing having at least a partial passage of the second passage formed therein; a free piston movably installed in the housing and configured to partition the second passage into an upstream side and a downstream side; and a spring member disposed in the housing and configured to hold the free piston at a neutral position, wherein the shock absorber has a second damping force generation mechanism comprising: wherein the free piston includes an interior chamber, and wherein the second passage allows fluid within the interior chamber of the free piston to communicate with the one chamber of the cylinder.