Patent ID: 8668061
Filing Date: 2014-03-11
Classification: B60G,F16F

Abstract:
1. 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 from an open position to a closed position in response to a velocity of said piston body with respect to said pressure tube being greater than a first predetermined value; wherein said second valve disc directly engages said piston body in both said open position and said closed position; and fluid flow through said normally open piston velocity sensitive valve being greater in said open position than in said closed position.