Patent ID: 9657805
Date: 2017-05-23
CPC Classifications: F16F,Y10T

Claim:
1. A frequency sensitive shock absorber, comprising: a cylinder containing a damping medium; a piston rod positioned for axial movement within the cylinder along a central axis; a piston assembly coupled to the piston rod and arranged for axial movement in the damping medium along the central axis to separate the cylinder into a first working space on a first side of the piston assembly and a second working space on a second side of the piston assembly, the piston assembly including: a first flow path allowing flow of the damping medium therein, the first flow path extending between the first side and the second side; a second flow path distinct from the first flow path, allowing flow of the damping medium therein, the second flow path extending between the first side and the second side and defining a first opening that is fluidly coupled with the first working space and a second opening that is fluidly coupled with the second working space; and a movable element positioned in the second flow path and movable along the second flow path with respect to the piston assembly between a first position in which the movable element blocks flow through the first opening and a second position in which the movable element blocks flow through the second opening, and the movable element is positionable at an intermediate position allowing flow through both of the first and second openings.