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:
Aug. 25, 2015
Filed:
Nov. 06, 2012
Autoliv Development Ab, Vargarda, SE;
Christian Fischer, Hamburg, DE;
Martin Schmidt, Elmshorn, DE;
Matthias Steinberg, Kiebitzreihe, DE;
Michael Pech, Hamburg, DE;
Tobias Voss, Klein Nordende, DE;
Thomas Schmidt, Timmendorfer Strand, DE;
Simone Mesecke-Rischmann, Hamburg, DE;
AUTOLIV DEVELOPMENT AB, Vargarda, SE;
Abstract
A piston for a pretensioner device () for a motor vehicle seat belt system of a type having a gas generator () with the piston () guided in a tube () that closes a pressure space () in the tube (). The pressure space () can be pressurized by the gas generator (), driving the piston () to undergo pretensioning operation transmitted to the seat belt system by a force transmission means. The piston has a dome shaped front side adapted to engage a force transmission element and a skirt forming a sealing lip oriented toward the pressure space. At least one slot is formed in the outer surface of the piston extending axially from the sealing lip. The slot can be enlarged by the material erosion caused by the pressure and/or pressure conditions in the pressure space produced by gas from the gas generator.