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. 02, 2002
Filed:
Aug. 24, 2000
Hiroki Takehara, Shiga, JP;
Hikaru Kameyoshi, Shiga, JP;
Hiromasa Tanji, Shiga, JP;
Joji Mishina, Shiga, JP;
Taktaka Corporation, Tokyo, JP;
Abstract
To provide a pretensioner with further improved safety of the device, wherein gas is appropriately allowed to escape in the event that the gas pressure within the pipe rises excessively. A pretensioner is attached to the outer side of the frame of a seatbelt retractor. A pressure container is connected to the base portion of a pipe of the pretensioner. A gas generator is stored within this pressure container. Multiple balls are provided within the pipe. A hole is opened in the side wall of the pipe at the portion positioned between the gas generator and ball. A rivet or other device is driven into this hole. The rivet breaks in the event that internal pressure exceeding a certain pressure (i.e., abnormal pressure) is applied to the pipe, and falls loose from the hole. Alternative embodiments of gas escape mechanisms are provided.