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:
Feb. 01, 2022
Filed:
Jul. 06, 2019
Autoliv Development Ab, Vargarda, SE;
Frank Matzen, Hamburg, DE;
Geert Wittenberg, Norderstedt, DE;
Giuliano Begovic, Elmshorn, DE;
David Winheim, Hamburg, DE;
Sven Krambeer, Halstenbek, DE;
AUTOLIV DEVELOPMENT AB, Vargarda, SE;
Abstract
A belt retractor for a motor vehicle seat belt device, with a rotatably mounted belt reel onto which a seat belt is wound, and a belt tensioner with a drive wheel (), which drives the belt reel in the event of an activation. A positively controlled tensioner coupling transfers the drive movement from the drive wheel () onto the belt reel. At least one coupling pawl () mounted on the drive wheel () and which is moved into and out of engagement with a toothing () rotationally fixed in relation to the belt reel to establish and disconnect a rotational connection of the drive wheel () with the belt reel. A friction ring () has a control arm () coupled with the coupling pawl (), wherein in the event of an activation of the belt tensioner, the friction ring () performs a relative movement to the drive wheel () by frictional forces and, controls via the control arm () the movement of the coupling pawl () into engagement and disengagement with the toothing (). The friction ring () and/or the coupling pawl () has a blocking contour (), positioned such that the coupling pawl () abuts thereon after the disengaging movement out of the toothing () and is blocked in the direction of a repeated engagement movement into the toothing ().