Ultrasonic motor and seat belt retractor

Details Ultrasonic motor and seat belt retractor Ultrasonic motor and seat belt retractor

1998-07-15

2000-08-08

Ramirez, Nestor

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H02N 200

Patent

active

061006246

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.

REFERENCES:
patent: 5313132 (1994-05-01), Nakanishi
patent: 5821669 (1998-10-01), Shin

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