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:
Sep. 23, 1997
Filed:
Feb. 14, 1996
Henning Rittstieg, Villa Hills, KY (US);
Hartmut Rolleke, Obereisser, DE;
Fichtel & Sachs AG, Schweinfurt, DE;
Abstract
Self-pumping air suspension spring for a motor vehicle, comprising a roller bellows, which form a spring chamber, a spring carrier which consists of a cylinder and a piston rod (which piston rod can move axially in the cylinder, whereby the roller bellows are functionally connected to the cylinder and the piston rod), a vestibule with at least one connection to the spring chamber and at least one connection to the air reservoir, which can be of any appropriate type. In the event of a movement of the piston rod, there is a pumping action via the vestibule in connection with at least one non-return valve in the spring chamber, whereby the vestibule is located inside the spring chamber enclosed by the roller bellows and the cylinder. At least one of the components of the air suspension spring executing the pumping action is formed by the piston rod. It is appropriate if the cylinder is used in conjunction with a vibration damper which is part of an air suspension spring.