Lining material and ultrasonic wave driven motor using lining ma

Details Lining material and ultrasonic wave driven motor using lining ma Lining material and ultrasonic wave driven motor using lining ma

1989-03-20

1991-05-07

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H01L 4108

Patent

active

050139568

ABSTRACT:
A lining material superior in abrasion-proof, considerably reducing the sliding sounds to be caused at high speeds, and an ultrasonic wave driven motor using the lining material (9) for the inverted face of a rotor (2).
The lining material is composed of total aromatic polyamide pulp granule of a meta type and/or total aromatic polyamide fiber of a meta type as main comonents, being 3 through 40% in the percentage of voids. As the lining material (9) is used as the inverted face of the rotor portion (2) which comes into contact against the vibration amplifying portion (5) of the stator portion (1), so that the noises during the driving operation may be reduced, and also, the service life of the inverted face may be extended.

REFERENCES:
patent: 4736129 (1988-04-01), Endo et al.
patent: 4739212 (1988-04-01), Imasaka et al.

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