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. 12, 2002
Filed:
Feb. 14, 2000
Tomonori Nagata, Aichi-ken, JP;
Seiji Hori, Aichi-ken, JP;
Akira Sumiyashiki, Aichi-ken, JP;
Katsuki Asagiri, Aichi-ken, JP;
Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho, Aichi-ken, JP;
Abstract
An inexpensive webbing retractor is obtained by making a pretensioner and a lock device small and reducing the number of parts. A plurality of protrusions are formed on an inner peripheral portion of the bearing body, which pivotally supports a clutch portion. These protrusions are brought into linear contact with an outer peripheral portion of the clutch portion, whereby the bearing body pivotally supports the clutch portion indirectly via the protrusions. Since the protrusions are brought into linear contact with the clutch portion, the contact area becomes quite small. Hence, the protrusions are easily plastically deformed due to friction resistance with the clutch portion. Therefore, resistance that obstructs the rotation of the clutch portion becomes small, and gas pressure can be efficiently supplied for the rotation of a take-up shaft. Also disclosed is a locking device comprising a lock base attached to the winding spool, a lock plate for engagement with ratchet teeth of a frame, and a lock cover which comprises a hook portion with which the lock base is engaged, and an outer peripheral flange portion overlapping the frame.