Patent ID: 6168143
Filing Date: 2001-01-02
Classification: B60G,F16C,F16F

Abstract:
A pneumatic spring in particular for rail vehicles and busses, comprising a bellows (3) made of elastomer material; a pot (2), on an upper part of which the bellows (3) is secured, whereby the bellows rolls off along an outer wall of the pot; a plate-shaped cover (1) arranged with a spacing from the pot (2), with the other end of the bellows (3) being secured on said cover; a centrally arranged rod (A) firmly connected with the cover (1) and protruding from the cover with a projection (B), whereby the rod, furthermore, immerses in the pot (2), extending parallel with the bellows (3); a ball-and-socket joint (7) located between the pot (2) and the rod (A) and supported on an inner wall of the pot, whereby the ball-and-socket joint is a metal-elastomer composite consisting of three layers and formed by two metal layers and an elastomer layer arranged in the middle; an air conduction system (19, 20); a slide bush (6) is arranged between the ball-and-socket joint (7) and the rod (A), said slide bush being supported sliding on an outer wall of the rod, an intermediate bush (5) is present, said bush being located between the ball-and-socket joint (7) and the slide bush (6); whereby the intermediate bush (5), the slide bush (6) and the ball-and-socket joint (7) extend cylindrically around the rod (A).