Patent ID: 8590678

Claim:
A shock absorber comprising: a pressure tube forming a fluid chamber; a piston body disposed within said fluid chamber, said piston body dividing said fluid chamber into an upper working chamber and a lower working chamber, said piston body defining a piston compression passage and a piston rebound passage; a piston rod attached to said piston body, said piston rod extending through one end of said pressure tube; a first valve assembly including a first valve disc engaging said piston body; a second valve assembly engaging said piston body; and a normally open piston velocity sensitive valve attached to said piston rod, said piston velocity sensitive valve including a second valve disc movable between an open position and a closed position in response to a first predetermined velocity of said piston body with respect to said pressure tube, said entire second valve disc being spaced from said first valve disc; wherein said second valve disc defines a first fluid passage between said second valve disc and said pressure tube and a second fluid passage between said second valve disc and said piston rod; and said second valve disc is moved to a closed position during movement of said piston body with respect to said pressure tube, said second fluid passage being closed when said second valve disc is in said closed position.