Patent ID: 9038790
Filing Date: 2015-05-26
Classification: F16F,Y10T

Abstract:
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 and extending from the first side to the second side; a second flow path distinct from the first flow path, allowing flow of the damping medium therein extending from the first side to the second side; a movable element positioned in the second flow path and movable along the second flow path with respect to the piston assembly; and wherein the second flow path defines a first opening fluidly coupled with the first working space and a second opening fluidly coupled with the second working space, the movable element movable among a first position, wherein the movable element blocks flow to the first opening, a second position, wherein the movable element blocks flow to the second opening, and an intermediate position allowing fluid flow to both the first and second openings.