Patent ID: 9500255
Filing Date: 2016-11-22
CPC Classification: F16F

Claim Text:
1. A shock absorber comprising: a pressure tube defining a fluid chamber for containing a working fluid; a piston assembly disposed within said pressure tube, said piston assembly dividing said fluid chamber into an upper working chamber and a lower working chamber; a piston rod projecting out of said pressure tube and having a bore extending therethrough, 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: movement of said spool valve within said fluid cavity controls an amount of fluid pressure required to open said compression bypass valve assembly, and thus allows a flow of said working fluid through said bore of said spool valve, completely bypassing said upper and lower chambers of said fluid cavity, and through said bore of said piston rod during a first frequency movement of said shock absorber, while at least substantially interrupting flow of said working fluid during a second frequency movement of said shock absorber which is of a lower frequency than said first frequency movement.