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. 18, 1995
Filed:
Jun. 21, 1993
NSK Ltd., Tokyo, JP;
Abstract
An object of the present invention is to provide a seat belt tightening device including a driving unit having excellent properties which assures that an intensity of webbing tightening power and a quantity of webbing tightening activity can easily be increased, and moreover, acceptable webbing tightening properties can be obtained with the seal belt tightening device. A driving unit 4 for a pretensioner disposed on one side wall of a retractor base 18 includes a pair of gas generators 8 and 9 which are arranged on the base end side of a cylinder 5. At the time of vehicle collision, a piston 6 slidably received in the cylinder 5 is driven by the explosion pressure derived from explosion of an explosive filled in both the gas generators 8 and 9, whereby a webbing winding shaft is rotated in such a direction that the loosened state of a seat belt can be eliminated.