Patent ID: 6460839
Filing Date: 2002-10-08
Classification: E05F,E05Y,F16F,Y10T

Abstract:
An air damper for a movably supported structural part in automobiles, said air damper comprising:a hollow cylinder (12) closed at one end thereof; a closure cap (14, 14a) mounted on the other end of the cylinder (12); a piston (16) slidably guided within the cylinder and having a rod (26) extending outwardly of the cylinder through the cap (14, 14a); an annular recess at the circumference of the piston (16); an annular sealing ring (20) in the recess which sealingly engages the inner wall of the cylinder (12) and the bottom of the recess, the axial extension of the sealing ring being smaller than that of the recess (18, 18a); at least one axial groove in the bottom of the recess (18, 18a) and at least one radial groove in the walls of the recess which communicate with the axial groove, with the cross section of the axial groove changing from one wall of the recess to the other wall; wherein the sealing ring is block-like and made of a thermoplastic elastomer, the sealing ring being coated with a layer which has approximately equal static and sliding frictions with the inner wall of the cylinder and the bottom of the recess.