Patent ID: 6830256
Filing Date: 2004-12-14
Classification: B60G,F16F

Abstract:
A rebound control shock absorber for placement between an axle and a chassis of a vehicle, the rebound control shock absorber for additionally controlling the vehicle dynamics with increasing resistance under motion between a preloaded vehicle ride height position to a fully extended position during rebound movement of the chassis away from the axle along an axis through the rebound control shock absorber, the rebound control shock absorber comprising:a) an axle mount on the axle of the vehicle and a chassis attachment on the chassis; b) an elongated rod having opposite ends aligned along the axis, the elongated rod connected by one end to either the axle mount or the chassis attachment; c) a fluid displacement piston located on the end opposite to the one end, the fluid displacement piston carried on the elongated rod opposite the one end; d) a tube aligned along the axis and connected to the axle mount if the one end is connected to the chassis attachment or to the chassis attachment if the one end is connected to the axle mount, the tube having inside and outside cylindrical surfaces, the inside cylindrical surface sized diametrically for surrounding the fluid displacement piston for sliding sealing circumferential engagement there between and for reciprocation along the axis; e) a chamber defined within the inside cylindrical surface, the chamber carrying damping fluid about the fluid displacement piston for controlled resistance to sliding reciprocal movement of the fluid displacement piston within the tube against the inside cylindrical surface and along the axis; f) a coil rebound spring carried about the outside cylindrical surface of the tube coaxial to and for expansion and contraction along the axis, the coil rebound spring mounted to restrain expansion along the axis of the rebound control shock absorber between the axle and the chassis from at least the preloaded vehicle ride height position to the fully extended position during rebound motion of the chassis away from the axle; g) a flanged retainer affixed about the outside cylindrical surface of the tube, located between a top and a bottom of the tube and affixed for applying axial rebound loads to the tube from the coil rebound spring during motion of the chassis away from the axle; h) a tube cap mounted in the top and extending from the tube inside cylindrical surface to a seat radially overhanging the tube cap beyond the outside cylindrical surface, and i) a bore passing through the tube cap positioned along the axis allows the elongated rod to pass there through and reciprocate therein, the tube cap connecting axially to the tube top to capture the coil rebound spring between the flanged retainer and the seat, the coil rebound spring thereby supported for coaxially circumscribing the tube so that rebound is resisted during expansion of the rebound control shock absorber from at least a preloaded height to full extension along the axis with motion of the chassis away from the axle.