Patent ID: 8746423
Filing Date: 2014-06-10
Classification: F16F

Abstract:
1. A shock absorber comprising: a cylinder in which a working fluid is enclosed; a piston slidably fitted into the cylinder and configured to partition an interior of the cylinder into two chambers; a piston rod connected to the piston and configured to extend to an exterior of the cylinder; first and second passages to which the working fluid flows out from one of the chambers of the interior of the cylinder by movement of the piston; a damping force generation mechanism installed in the first passage and configured to generate a damping force; a housing in which a flow passage corresponding to at least a part of the second passage is formed; a free piston movably installed in the housing and configured to partition the second passage into an upstream side and a downstream side; and an elastic body disposed between the free piston and the housing, wherein at least one of a free piston contact surface of the free piston with which the elastic body is in contact and a housing contact surface of the housing with which the elastic body is in contact includes an inclined surface that is inclined to a moving direction of the free piston, a shortest distance between a portion of the free piston contact surface that is in contact with the elastic body and a portion of the housing contact surface that is in contact with the elastic body is changed by movement of the free piston, and the free piston contact surface and the housing contact surface have a shape set to change a direction of a segment representing the shortest distance between the portion of the free piston contact surface that is in contact with the elastic body and the portion of the housing contact surface that is in contact with the elastic body.