Patent ID: 6431529
Filing Date: 2002-08-13
Classification: F16F

Abstract:
An air spring comprising; an outer sleeve provided with a hollow cylindrical body suppressing an expansion of a diaphragm at a stroke in a compression direction of the air spring and an air supply and discharge port, an inner sleeve fitted into an inside of the outside sleeve and a folded portion of the diaphragm connecting the outer sleeve and the inner sleeve to each other to form an air chamber, therein an inner diameter of the diaphragm prior to assembly at a region engaged with at least an inner sleeve of the air spring is made equal to or smaller than a minimum outer diameter of the inner sleeve so as to exert a tensile force in a circumferential direction of the diaphragm at a state of engaging with the inner sleeve, and wherein the diaphragm is a tapered shape wherein the inner diameter becomes gradually small from a position engaging with the outer sleeve toward a position engaging with the inner sleeve.