Patent ID: 7703587
Filing Date: 2010-04-27
Classification: F16F

Abstract:
1. A rod guide for a monotube shock absorber that includes a piston rod, a cylinder disposed for movement relative to the piston rod and shock oil contained in the cylinder, said rod guide being operatively disposed within the cylinder and about the piston rod and comprising: a guide body peripherally sized for a close fit with an inner wall of the cylinder and having a central throughbore and a first recess defined in the central throughbore at a bottom of said guide body, said guide body being mounted in fluid-sealing engagement with the inner wall of the cylinder; a unitary insert body sized for a frictional fit with and disposed in said first recess and having an insert throughbore sized for fluid-sealing receipt therethrough of the piston rod, said insert body being formed of a plastic material having a coefficient of friction of less than approximately 0.25, the insert body defining holes therethrough to facilitate passage of shock oil therethrough whereby large increases in pressure on the insert body are avoided; and a first sealing body disposed in said guide body for supplementing fluid-sealing contact between said rod guide and the piston rod.