US4736129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic motor
Assignee: Marcon Electronics Co Ltd
•
Filing: 1986-05-27
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Granted: 1988-04-05
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Expires: 2006-05-27
Abstract
Abstract An ultrasonic motor includes piezoelectric resonators for generating vibration waves, an elastic vibration member along which an elastic wave propagates when driving of the piezoelectric resonators is driven, a sliding member located in contact with the elastic vibration member under pressure and adapted to slide along the elastic vibration member when the elastic wave propagates, and a friction member located on the sliding member and brought into frictional contact with the elastic vibration member, the friction member being made of a material having a hardness of less than 100 and larger than 94 measured by a spring A type hardness tester, a hardness of 40 to 120 measured by a Rockwell's R type hardness tester, hardness of 20 to 80 measured by a Rockwell's M type hardness tester, a hardness of 40 to 90 measured by a Shore A type hardness tester, or a hardness of 20 to 70 measured by a Shore D type hardness tester.
Inventors
- 👤 Akira Endo
- 👤 Nobutoshi Sasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:27
CPC Classifications
H; H02; H02N; H02N2/00; H02N2/02; H02N2/08; H02N2/0005; H02N2/005; H02N2/0065; H02N2/007; H02N2/10; H02N2/16; H02N2/163
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
120 words
An ultrasonic motor comprising: piezoelectric resonators for generating vibration waves; an elastic vibration member along which an elastic wave propagates when said piezoelectric resonators are driven; a sliding member located in contact with said elastic vibration member under pressure and adapted to slide along said elastic vibration member when the elastic wave propagates; and a friction member located on said sliding member and brought into frictional contact with said elastic vibration member, said friction member being made of a resinous material to which is added an additive selected from the group consisting of an inorganic powder and a fibrous material and having a hardness of less than 100 and more than 94 measured by a spring A type hardness tester.
Claim 2
Dependent Claim
120 words
An ultrasonic motor comprising: piezoelectric resonators for generating vibration waves; an elastic vibration member along which an elastic wave propagates when said piezoelectric resonators are driven; a sliding member located in contact with said elastic vibration member under pressure and adapted to slide along said elastic vibration member when the elastic wave propagates; and a friction member located on said sliding member and brought into frictional contact with said elastic vibration member, said friction member being made of a resinous material to which is added an additive selected from the group consisting of an inorganic powder and a fibrous material and having a hardness of less than 100 and more than 94 measured by a spring A type hardness tester.
Claim 3
Dependent Claim
40 words
A motor according to claim 1, wherein said friction material is selected from the group consisting of natural rubber, styrene-butadiene rubber, butadiene rubber, chloroprene rubber, acrylonitrile-butadiene rubber, ethylene-propylene rubber, ethylene-propylenediene terpolymer, isoprene rubber, isobutylene-isoprene rubber, acrylic rubber, and urethan rubber.
Claim 4
Dependent Claim
14 words
A motor according to claim 1, wherein said friction material is made of thermoplastic.
Claim 5
Dependent Claim
36 words
A motor according to claim 4, wherein said friction material is selected from the group consisting of styrene resin, acrylic resin, polyethylene resin, polyamide resin, fluoroplastics, polyester resin, vinylidene chloride resin, polysulfone resin, and polyphenylene sulfide.
Claim 6
Dependent Claim
14 words
A motor according to claim 1, wherein said friction material is made of thermoset.
Claim 7
Dependent Claim
39 words
A motor according to claim 5, wherein said friction material is selected from the group consisting of epoxy resin, unsaturated polyester, phenolic resin, melamine resin, urea resin, furan resin, polyimide resin, diallyl phthalate resin, silicone resin, and alkyl resin.
Claim 8
Dependent Claim
15 words
A motor according to claim 1, wherein said friction material is made of copolymer resin.
Claim 9
Dependent Claim
64 words
A motor according to claim 7, wherein said friction material is selected from the group consisting of acrylonitrile-styrene resin, BS resin, ABS resin, ethylene-vinyl acetal copolymer resin, fluorinated ethylene propylene resin, MM resin, acetal resin, copolymer of epoxy resin and silicon resin, copolymer of polyethylene resin ans styrene resin, copolymer of butadiene rubber and isobutylene-isoprene rubber, and copolymer of chroloprene rubber and acrylonitrile-butadiene rubber.
Claim 10
Dependent Claim
29 words
A motor according to claim 1, wherein said friction material is selected from the group consisting of mixture epoxy resin with acrylonitrile butadiene rubber, unsaturated polyester with styrene-butadiene rubber.
Claim 11
Dependent Claim
119 words
An ultrasonic motor comprising: piezoelectric resonators for generating vibration waves; an elastic vibration member along which an elastic wave propagates when said piezoelectric resonators are driven; a sliding member located in contact with said elastic vibration member under pressure and adapted to slide along said elastic vibration member when the elastic wave propagates; and a friction member located on said sliding member and brought into frictional contact with said elastic vibration member, said friction member being made of a resinous material to which is added an additive selected from the group consisting of an inorganic powder and a fibrous material and having a hardness within the range of 40 to 120 measured by a Rockwell's R type hardness tester.
Claim 12
Dependent Claim
119 words
An ultrasonic motor comprising: piezoelectric resonators for generating vibration waves; an elastic vibration member along which an elastic wave propagates when said piezoelectric resonators are driven; a sliding member located in contact with said elastic vibration member under pressure and adapted to slide along said elastic vibration member when the elastic wave propagates; and a friction member located on said sliding member and brought into frictional contact with said elastic vibration member, said friction member being made of a resinous material to which is added an additive selected from the group consisting of an inorganic powder and a fibrous material and having a hardness within the range of 40 to 120 measured by a Rockwell's R type hardness tester.
Claim 13
Dependent Claim
40 words
A motor according to claim 10, wherein said friction material is selected from the group consisting of natural rubber, styrene-butadiene rubber, butadiene rubber, chloroprene rubber, acrylonitrile-butadiene rubber, ethylene-propylene rubber, ethylene-propylenediene terpolymer, isoprene rubber, isobutylene-isoprene rubber, acrylic rubber, and urethan rubber,
Claim 14
Dependent Claim
14 words
A motor according to claim 11, wherein said friction material is made of thermoplastic.
Claim 15
Dependent Claim
36 words
A motor according to claim 12, wherein said friction material is selected from the group consisting of styrene resin, acrylic resin, polyethylene resin, polyamide resin, fluoroplastics, polyester resin, vinylidene chloride resin, polysulfone resin, and polyphenylene sulfide.
Claim 16
Dependent Claim
14 words
A motor according to claim 10, wherein said friction material is made of thermoset.
Claim 17
Dependent Claim
39 words
A motor according to claim 14, wherein said friction material is selected from the group consisting of epoxy resin, unsaturated polyester, phenolic resin, melamine resin, urea resin, furan resin, polyimide resin, diallyl phthalate resin, silicone resin, and alkyl resin.
Claim 18
Dependent Claim
15 words
A motor according to claim 10, wherein said friction material is made of copolymer resin.
Claim 19
Dependent Claim
64 words
A motor according to claim 16, wherein said friction material is selected from the group consisting of acrylonitrile-styrene resin, BS resin, ABS resin, ethylene-vinyl acetal copolymer resin, fluorinated ethylene propylene resin, MM resin, acetal resin, copolymer of epoxy resin and silicon resin, copolymer of polyethylene resin and styrene resin, copolymer of butadiene rubber and isobutylene-isoprene rubber, and copolymer of chroloprene rubber and acrylonitrile-butadiene rubber.
Claim 20
Dependent Claim
29 words
A motor according to claim 10, wherein said friction material is selected from the group consisting of mixture epoxy resin with acrylonitrile butadiene rubber, unsaturated polyester with styrene-butadiene rubber.
Claim 21
Dependent Claim
119 words
An ultrasonic motor comprising: piezoelectric resonators for generating vibration waves; an elastic vibration member along which an elastic wave propagates when said piezoelectric resonators are driven; a sliding member located in contact with said elastic vibration member under pressure and adapted to slide along said elastic vibration member when the elastic wave propagates; and a friction member located on said sliding member and brought into frictional contact with said elastic vibration member, said friction member being made of a resinous material to which is added an additive selected from the group consisting of an inorganic powder and a fibrous material and having a hardness within the range of 20 to 80 measured by a Rockwell's M type hardness tester.
Claim 22
Dependent Claim
119 words
An ultrasonic motor comprising: piezoelectric resonators for generating vibration waves; an elastic vibration member along which an elastic wave propagates when said piezoelectric resonators are driven; a sliding member located in contact with said elastic vibration member under pressure and adapted to slide along said elastic vibration member when the elastic wave propagates; and a friction member located on said sliding member and brought into frictional contact with said elastic vibration member, said friction member being made of a resinous material to which is added an additive selected from the group consisting of an inorganic powder and a fibrous material and having a hardness within the range of 20 to 80 measured by a Rockwell's M type hardness tester.
Claim 23
Dependent Claim
40 words
A motor according to claim 19, wherein said friction material is selected from the group consisting of natural rubber, styrene-butadiene rubber, butadiene rubber, chloroprene rubber, acyrlonitrile-butadiene rubber, ethylene-propylene rubber, ethylene-propylenediene terpolymer, isoprene rubber, isobutylene-isoprene rubber, acrylic rubber, and urenthan rubber.
Claim 24
Dependent Claim
14 words
A motor according to claim 19, wherein said friction material is made of thermoplastic.
Claim 25
Dependent Claim
36 words
A motor according to claim 21, wherein said friction material is selected from the group consisting of styrene resin, acrylic resin, polyethylene resin, polyamide resin, fluoroplastics, polyester resin, vinylidene chloride resin, polysulfone resin, and polyphenylene, sulfide.
Claim 26
Dependent Claim
14 words
A motor according to claim 19, wherein said friction material is made of thermoset.
Claim 27
Dependent Claim
39 words
A motor according to claim 23, wherein said friction material is selected from the group consisting of epoxy resin, unsaturated polyester, phenolic resin, melamine resin, urea resin, furan resin, polyimide resin, diallyl phthalate resin, silicone resin, and alkyl resin.
Claim 28
Dependent Claim
15 words
A motor according to claim 19, wherein said friction material is made of copolymer resin.
Claim 29
Dependent Claim
64 words
A motor according to claim 25, wherein siad friction material is selected from the group consisting of acrylonitrile-styrene resin, BS resin, ABS resin, ethylene-vinyl acetal copolymer resin, fluorinated ethylene propylene resin, MM resin, acetal resin, copolymer of epoxy resin and silicon resin, copolymer of polyethylene resin and styrene resin, copolymer of butadiene rubber and isobutylene-isoprene rubber, and copolymer of chroloprene rubber and acrylonitrile-butadiene rubber.
Claim 30
Dependent Claim
29 words
A motor according to claim 19, wherein said friction material is selected from the group consisting of mixture epoxy resin with acrylonitrile butadiene rubber, unsaturated polyester with styrene-butadiene rubber.
Claim 31
Dependent Claim
134 words
An ultrasonic motor comprising: piezoelectric resonators for generating vibration waves; an elastic vibration member along which an elastic wave propagates when said piezoelectric resonators are driven; a sliding member located in contact with said elastic vibration member under pressure and adapted to slide along said elastic vibration member when the elastic wave propagates; and a friction member located on said sliding member and brought into frictional contact with said elastic vibration member, said friction member being made of a resinous material to which is added an additive selected from the group consisting of an inorganic powder and a fibrous material and having a hardness within the range of 40 to 90 measured by a Shore A type hardness tester, or the range of 20 to 70 measured by a Shore D type hardness tester.
Claim 32
Dependent Claim
134 words
An ultrasonic motor comprising: piezoelectric resonators for generating vibration waves; an elastic vibration member along which an elastic wave propagates when said piezoelectric resonators are driven; a sliding member located in contact with said elastic vibration member under pressure and adapted to slide along said elastic vibration member when the elastic wave propagates; and a friction member located on said sliding member and brought into frictional contact with said elastic vibration member, said friction member being made of a resinous material to which is added an additive selected from the group consisting of an inorganic powder and a fibrous material and having a hardness within the range of 40 to 90 measured by a Shore A type hardness tester, or the range of 20 to 70 measured by a Shore D type hardness tester.
Claim 33
Dependent Claim
40 words
A motor according to claim 28, wherein said friction material is selected from the group consisting of natural rubber, styrene-butadiene rubber, butadiene rubber, chloroprene rubber, acrylonitrile-butadiene rubber, ethylene-propylene rubber, ethylene-propylene-diene terpolymer, isoprene rubber, isobutylene-isoprene rubber, acrylic rubber, and urethan rubber.
Claim 34
Dependent Claim
14 words
A motor according to claim 28, wherein said friction material is made of thermoplastic.
Claim 35
Dependent Claim
36 words
A motor according to claim 30, wherein said friction material is selected from the group consisting of styrene resin, acrylic resin, polyethylene resin, polyamide resin, fluoroplastics, polyester resin, vinylidene chloride resin, polysulfone resin, and polyphenylene sulfide.
Claim 36
Dependent Claim
14 words
A motor according to claim 28, wherein said friction material is made of thermoset.
Claim 37
Dependent Claim
39 words
A motor according to claim 32, wherein said friction material is selected from the group consisting of epoxy resin, unsaturated polyester, phenolic resin, melamine resin, urea resin, furan resin, polyimide resin, diallyl phthalate resin, silicone resin, and alkyl resin.
Claim 38
Dependent Claim
15 words
A motor according to claim 28, wherein said friction material is made of copolymer resin.
Claim 39
Dependent Claim
64 words
A motor according to claim 34, wherein said friction material is selected from the group consisting of acrylonitrile-styrene resin, BS resin, ABS resin, ethylene-vinyl acetal copolymer resin, fluorinated ethylene propylene resin, MM resin, acetal resin, copolymer of epoxy resin and silicon resin, copolymer of polyethylene resin and styrene resin, copolymer of butadiene rubber and isobutylene-isoprene rubber, and copolymer of chroloprene rubber and acrylonitrile-butadiene rubber.
Claim 40
Dependent Claim
29 words
A motor according to claim 3, wherein said friction material is selected from the group consist of mixture epoxy resin with acrylonitrile butadiene rubber, unsaturated polyester with styrene-butadiene rubber.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-05 | 1991-10-05 | 1992-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-05 | 1995-10-05 | 1996-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-05 | 1999-10-05 | 2000-04-05 | $7700.00 | Window Closed / Lapsed |