Patent ID: 9080634
Filing Date: 2015-07-14
Classification: F16F

Abstract:
1. A shock absorber comprising: a pressure tube defining a first fluid chamber; a piston assembly disposed within the pressure tube, said piston assembly dividing said first fluid chamber into an upper working chamber and a lower working chamber; a piston rod projecting out of said pressure tube, said piston assembly being attached to said piston rod; a frequency dependent valve assembly attached to said piston rod, said frequency dependent valve assembly comprising: pressure acting on said first side of said piston during a compression stroke of said piston assembly controls movement of said piston within said second fluid chamber in a first direction, which in turn controllably blocks fluid flow through said first radial flow passage, to thus control an amount of fluid flowing through said bypass fluid passage during said compression stroke; and pressure acting on said second side of said piston during an extension stroke of said piston assembly controls movement of said piston within said second fluid chamber in a second direction linearly opposite to said first direction, which in turn controllably blocks fluid flow through said second radial flow passage, to thus also control a flow of fluid flowing through said bypass fluid passage during said extension stroke of said piston assembly.