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:
Aug. 08, 2000
Filed:
Jul. 15, 1998
Applicant:
Inventor:
Takahiro Yamanishi, Shiga, JP;
Assignee:
Takata Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02N / ;
U.S. Cl.
CPC ...
31032309 ;
Abstract
An ultrasonic motor capable of adjusting the degree of contact strength between the rotor and the stator. The ultrasonic motor for driving a reel of a seat belt retractor includes a stator, a rotor, and a spring. The pressing force by the spring is adjusted by moving a clutch shaft in a back-and-forth direction. The clutch shaft is moved by a clutch control ultrasonic motor.