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:
Jul. 18, 2000
Filed:
Apr. 22, 1999
Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho, Aichi-ken, JP;
Abstract
A pretensioner for a webbing retractor is provided with a cylinder into which gas is supplied thereby moving a piston. A rack thus causes a pinion to rotate which causes a webbing to be wound onto a winding shaft. During the assembly process for the pretensioner, an O ring is fitted onto a seal holding portion of a piston and the O ring and piston are inserted together into a cylinder. Therefore, the conventional cutting process for forming a seal holding groove is unnecessary. In a normal state, the piston does not come into direct contact with the bottom portion of the cylinder, as in a conventional apparatus, instead the O ring abuts the bottom portion of the cylinder. Therefore, noise generated by the bottom of the cylinder coming into contact with the piston due to vibration and the like can be prevented.