Patent EP0222394A2 successfully refreshed from Google Patents.
EP0222394A2
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Ultrasonic motor
Assignee: Panasonic Holdings Corp
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Filing: 1986-11-12
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Granted: —
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Expires: 2006-11-12
Abstract
Abstract A friction material containing at least a rubber-like elastic body is provided between a vibrating stator (2) provided with a piezoelectric element (4) for producing travelling wave and a rotor of an ultrasonic motor. Noise is suppressed and motor capabilities such as driving torque and wear are fairly improved.
Inventors
- 👤 Masanori Sumihara
- 👤 Yoshinobu Imasaka
- 👤 Akira Tokushima
- 👤 Hiroshi Yoneno
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 02:32
CPC Classifications
H; H02; H02N; H02N2/00; H02N2/10; H02N2/16; H02N2/163; H02N2/0005; H02N2/005; H02N2/0065; H02N2/007; H02N2/166
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
84 words
Ultrasonic motor comprising (2) a vibrating stator provided with a piezoelectric (4) element for producing travelling wave, an object to be driven by driving force based on said travelling wave, and a friction material containing at least rubber-like elastic body for transmitting said driving force from (2) (3) said vibrating stator to said object, said friction (1) (2) material being provided between said vibrating stator and said object in a manner to give enough contact therebetween, to transmit said driving force by friction force.
Claim 2
Dependent Claim
84 words
Ultrasonic motor comprising (2) a vibrating stator provided with a piezoelectric (4) element for producing travelling wave, an object to be driven by driving force based on said travelling wave, and a friction material containing at least rubber-like elastic body for transmitting said driving force from (2) (3) said vibrating stator to said object, said friction (1) (2) material being provided between said vibrating stator and said object in a manner to give enough contact therebetween, to transmit said driving force by friction force.
Claim 3
Dependent Claim
39 words
Ultrasonic motor in accordance with claim 1 wherein; said rubber-like elastic body is made of at least one member selected from the group consisting of natural rubber, synthetic rubber, rubber denatured thermosetting resin, flexibility-given thermosetting resin and thermoplastic elastomer.
Claim 4
Dependent Claim
14 words
Ultrasonic motor in accordance with claim 2 wherein; said synthetic rubber is polyurethane elastomer.
Claim 5
Dependent Claim
18 words
Ultrasonic motor in accordance with claim 2 wherein; said rubber denatured thermosetting resin is rubber denatured phenol resin.
Claim 6
Dependent Claim
15 words
Ultrasonic motor in accordance with claim 2 wherein; said flexibility-given thermosetting resin is bismaleimide-triazine resin.
Claim 7
Dependent Claim
15 words
Ultrasonic motor in accordance with claim 1 wherein; said friction material contains aromatic polyamide fiber.
Claim 8
Dependent Claim
28 words
Ultrasonic motor in accordance with claim 6 wherein; said aromatic polyamide fiber is at least one member selected from the group consisting of woven fabric and non-woven fabric.
Claim 9
Dependent Claim
29 words
Ultrasonic motor in accordance with claim 7 wherein; said woven fabric is at least one member selected from the group consisting of plane fabric, diagonal-woven fabric and satin-woven fabric.
Claim 10
Dependent Claim
29 words
Ultrasonic motor in accordance with claim 7 wherein; said non-woven fabric is at least one member selected from the group consisting of felt-like body, pulp-like body and discontinuous filament.
Claim 11
Dependent Claim
16 words
Ultrasonic motor in accordance with claim 6 wherein; said aromatic polyamide fiber is poly-para- phenylene-terephthalamide fiber.
Claim 12
Dependent Claim
24 words
Ultrasonic motor in accordance with claim 1 wherein; said friction material is made by combination of said rubber-like elastic body and aromatic polyamide fiber.
Claim 13
Dependent Claim
32 words
Ultrasonic motor in accordance with claim 11 wherein; (1) said friction material is made by scattering said aromatic polyamide fiber of 2-60 volume % into bismaleimide-triazine resin as said rubber-like elastic body.
Claim 14
Dependent Claim
27 words
Ultrasonic motor in accordance with claim 1 wherein; said friction material contains at least one member selected from the group consisting of inorganic filler and organic filler.
Claim 15
Dependent Claim
13 words
Ultrasonic motor in accordance with claim 13 wherein; said inorganic filler is mica.
Claim 16
Dependent Claim
22 words
Ultrasonic motor in accordance with claim 1 wherein; said friction material is made by combination of aromatic polyamide fiber and inorganic filler.
Claim 17
Dependent Claim
42 words
Ultrasonic motor in accordance with claim 15 wherein; (1) said friction material is made by scattering said aromatic polyamide fiber of 10-60 weight % and mica of 5-30 weight % as said inorganic filler into polyurethane elastomer as said rubber-like elastic body.
References Cited (Backward Citations)
No citation records indexed.
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