IP Library › Granted Patent US 12661946
Granted Patent B2
US 12661946 · App. 18/255,836 · Granted Jun 23, 2026

Air spring

Inventors: Ziga Janhar (Smlednik, SI); Peter Heberle (Kranj, SI); Matej Kosir (Trzic, SI); Brane Stojko (Sencur, SI); Francesc Bosch-Masgrau (Wunstorf, DE); Carsten Hansen (Peine, DE); Simon Oman (Ljubljana, SI)
Assignee: ContiTech AG
B60G11/27B60G11/28B60G2202/152B60G2204/126B60G2206/424
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Quick Facts
Patent No.
US 12661946
App. No.
18/255,836
Filed
Jun 2, 2023
Granted
Jun 23, 2026
Kind
B2
Art Unit
3616
USPC
267/64.11
Abstract

An air spring with an air spring rolling bellows made of elastomer material with reinforcing layers embedded within the rolling bellows wall, the air spring being clamped in between a sprung and an unsprung mass, and the air spring rolling bellows, at least at one of its two open ends, having a bead ring or a reinforced end region and being fastened in an airtight manner to an air spring cover connected to the sprung mass, the rolling bellows being fastened in an airtight manner by way of its other open end to a connection part connected to the unsprung mass, and the cover, connection part and rolling bellows delimiting a working space filled with compressed air, wherein at least the airtight connection between the air spring rolling bellows and the air spring cover is effected by means of a connecting element which is fastened to the bead ring or to the reinforced end region in a materially bonded and/or positively locking manner.

Claims (10)

1 . An air spring comprising:

a plurality of air spring rolling bellows made of elastomer material with reinforcing layers embedded within the rolling bellows wall;

the air spring clamped in between a sprung and an unsprung mass;

the air spring rolling bellows comprising two open ends, at least at one of its two open ends, having a bead ring and fastened in an airtight manner to an air spring cover connected to the sprung mass;

the rolling bellows fastened in an airtight manner by way of its other open end to a connection part connected to the unsprung mass;

the air spring cover, connection part and rolling bellows delimiting a working space filled with compressed air, wherein at least the airtight connection between the air spring rolling bellows and the air spring cover is effected by means of a connecting element which is fastened to the bead ring in a materially bonded and/or positively locking manner, wherein the connecting element is configured in the form of a screw ring inserted into the bead ring, the screw ring is provided with an external thread and can be screwed into a complementary internal thread provided in the air spring cover.

2 . The air spring of claim 1 , in which the screw ring ( 7 ) is composed of plastic or plastics resin and is adhesively bonded to, or vulcanized with, the bead ring.

3 . The air spring of claim 1 , in which the bead ring ( 5 , 17 ) is configured such that, during the screwing operation, parts of the bead ring or of the air spring bellows bear against the air spring cover ( 4 , 11 ) and are deformed in a sealing manner.

4 . The air spring of claim 1 , in which the air spring cover has a sealing surface and an associated sealing element which is activated by the screwing-in operation.

5 . The air spring of claim 1 , in which the connecting element ( 7 , 14 ) is connected to the air spring bellows during a vulcanization thereof.