Air damper for a movably supported structural part, in particular in automobiles

摘要

An air damper for a movably supported structural part in automobiles comprises a hollow cylinder closed at one end thereof, a closure cap mounted on the other end of the cylinder, a piston slidably guided within the cylinder, an annular recess at the circumference of the piston, and an annular sealing ring in the recess. The block-like sealing ring is made of a thermoplastic elastomer coated with a layer which has the same static and sliding frictions with the inner wall of the cylinder and the bottom of the recess. A coil spring is placed between the closure cap and the piston. A piston rod of the piston has an elongated rib contacting the spring when the spring is in a relieved state.