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AssigneesMatsushita Electric Industrial Co., Ltd., Teijin Limited
InventorsSeiji Kurozumi, Shigenori Uda, Masatake Hirai, Katuhiro Murano, Takeo Kimura, Nobuyuki Yamamoto
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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.
A lining material composed of a meta-type aramid fibrid and meta-type aramid fiber as main components.
An ultrasonic wave driven motor comprising a stator portion having an excitation portion having a vibration component and forming a driving face having abrasion-proof properties and tenacity therein, and a rotor portion having an inverted face, softer than the driving face and abrasion-resistant, is brought into contact against the driving face, wherein the lining material which is composed of a meta-type aramid fibrid and a meta-type aramid fiber as main components is provided on the inverted face.
Dependencies are inferred from the claim text.