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:
Mar. 25, 2014
Filed:
Dec. 08, 2010
Masahiro Shiotani, Tokyo, JP;
Yusuke Iura, Tokyo, JP;
Masahiro Shiotani, Tokyo, JP;
Yusuke Iura, Tokyo, JP;
Takata Corporation, Tokyo, JP;
Abstract
To effectively operate a pretensioner using a plurality of balls and an energy absorption mechanism, to simplify the structure of an exhaust passage in the pretensioner, and to facilitate the working process of the exhaust passage. A pretensionerincludes a plurality of ballsserving as force transmission members and a pistonin a pipe. A piston bodyof the pistonincludes a shaft portionand a substantially hemispherical head portion. The piston bodyis provided with an exhaust holeextending in the axial direction and exhaust groovescommunicating with the exhaust holethat define an exhaust passage. The exhaust groovesprevent the exhaust holefrom being closed even if the head portionof the pistoncontacts the ball. Since the exhaust holeand the exhaust groovesare simply provided in the piston bodyformed as a single member, the structure of the exhaust passage is simple, and working of the exhaust passage is easy.