The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 28, 2026
Filed:
Oct. 12, 2021
Contitech Luftfedersysteme Gmbh, Hannover, DE;
Reinhard Stahmer, Neustadt am Ruebenberge, DE;
Boris Balachonzew, Garbsen, DE;
ContiTech Luftedersysteme GmbH, Hannover, DE;
Abstract
The invention relates to an air spring () with an elastic air spring bellows (), wherein the air spring bellows is tightly connected to an air spring cover () at its first open end and to an air spring piston () at its second open end and thereby at least partially encloses a working chamber () filled with compressed air, wherein the air spring bellows forms a rolling fold () which can roll on the air spring piston (), wherein the air spring bellows has a fastening bead () at least at its one end which faces the air spring piston, wherein a radially inwardly extending shoulder region () is formed at the bellows-side axial end of the air spring piston (), wherein a conical sealing seat () is formed radially on the inside at the shoulder region, wherein a radially inner sealing face () of the fastening bead bears against the conical sealing seat of the air spring piston so as to seal the working chamber, and wherein the underside () of the fastening bead pointing towards the air spring piston is pushed axially onto the shoulder region of the air spring piston. It is provided according to the invention that an annular piston shoulder attachment () is arranged at the shoulder region of the air spring piston, that the piston shoulder attachment has a radial inner side () which directly or indirectly adjoins the radial outer side () of the fastening bead of the air spring bellows, and that the piston shoulder attachment has a radial outer side () which, at least in the region of its greatest external diameter, adjoins a radial outer contour () of the air spring piston in a radially flush manner.