US4044273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic transducer
Assignee: Hitachi Ltd
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Filing: 1975-11-25
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Granted: 1977-08-23
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Expires: 1995-11-25
Abstract
Abstract A transducer included in an ultrasonic source is a concave ultrasonic transducer made of a piezoelectric material. The concave ultrasonic transducer is shaped into such body of revolution that a section of the transducer forms a revolutionary arc surface consisting of two arcs. Owing to the shape, an ultrasonic source similar to a conventional ring type source is constructed.
Inventors
- 👤 Hiroshi Kanda
- 👤 Kageyoshi Katakura
- 👤 Takaji Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:43
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/18; G10K11/26; G10K11/32; H; H04; H04R; H04R17/00; G01; G01N; G01N2291/00; G01N2291/02; G01N2291/028; G01N2291/02872
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
74 words
An ultrasonic transducer device comprising ultrasonic transducer means for generating ultrasonic waves and providing a locus of points of convergence of the generated ultrasonic waves in the form of a ring, said ultrasonic transducer means including an ulrasonic transducer formed of a piezoelectric material, said ultrasonic transducer being a surface type transducer and being provided with a shape such that a locus of points of convergence of said generated ultrasonic waves forms a ring.
Claim 2
Dependent Claim
74 words
An ultrasonic transducer device comprising ultrasonic transducer means for generating ultrasonic waves and providing a locus of points of convergence of the generated ultrasonic waves in the form of a ring, said ultrasonic transducer means including an ulrasonic transducer formed of a piezoelectric material, said ultrasonic transducer being a surface type transducer and being provided with a shape such that a locus of points of convergence of said generated ultrasonic waves forms a ring.
Claim 3
Dependent Claim
36 words
An ultrasonic transducer device according to claim 1, wherein said ultrasonic transducer is provided with a shape in the form of a body of revolution of two adjacent curved surfaces joined at the adjacent ends thereof.
Claim 4
Dependent Claim
22 words
An ultrasonic transducer device according to claim 2, wherein each curved surface has a point of convergence at its center of curvature.
Claim 5
Dependent Claim
37 words
An ultrasonic transducer device according to claim 2, wherein said ultrasonic transducer is provided with a shape such that a section of an axis thereof forms a pair of revolutionary planes consisting of said two curved surfaces.
Claim 6
Dependent Claim
17 words
An ultrasonic transducer device according to claim 2, wherein each curved surface is a concave arc surface.
Claim 7
Dependent Claim
17 words
An ultrasonic transducer device according to claim 2, wherein each curved surface is a convex arc surface.
Claim 8
Dependent Claim
19 words
An ultrasonic transducer device according to claim 2, wherein the curved surfaces are one of paraboloidal and ellipsoidal surfaces.
Claim 9
Dependent Claim
22 words
An ultrasonic transducer device according to claim 2, wherein the curved surfaces are formed of a plurality of different radii of curvature.
Claim 10
Dependent Claim
93 words
An ultrasonic transducer device comprising ultrasonic transducer means for generating ultrasonic waves and providing a locus of points of convergence of the generated ultrasonic waves in the form of a ring, said ultrasonic transducer means including an ultrasonic transducer formed of piezoelectric material, said ultrasonic transducer being a surface type plane transducer, said ultrasonic transducer means further comprising an acoustic lens bonded onto one flat surface of said plane transducer, said acoustic lens having a shape of a body of revolution of two adjacent curved surfaces joined together at the adjacent ends thereof.
Claim 11
Dependent Claim
93 words
An ultrasonic transducer device comprising ultrasonic transducer means for generating ultrasonic waves and providing a locus of points of convergence of the generated ultrasonic waves in the form of a ring, said ultrasonic transducer means including an ultrasonic transducer formed of piezoelectric material, said ultrasonic transducer being a surface type plane transducer, said ultrasonic transducer means further comprising an acoustic lens bonded onto one flat surface of said plane transducer, said acoustic lens having a shape of a body of revolution of two adjacent curved surfaces joined together at the adjacent ends thereof.
Claim 12
Dependent Claim
22 words
An ultrasonic transducer device according to claim 9, wherein each curved surface has a point of convergence at its center of curvature.
Claim 13
Dependent Claim
29 words
An ultrasonic transducer device according to claim 9, wherein a section containing an axis of said acoustic lens forms a pair of revolutionary planes consisting of said curved surfaces.
Claim 14
Dependent Claim
28 words
An ultrasonic transducer device according to claim 11, wherein said acoustic lens is provided with a flat surface bonded onto the one flat surface of said plane transducer.
Claim 15
Dependent Claim
17 words
An ultrasonic transducer device according to claim 11, wherein each curved surface is a concave arc surface.
Claim 16
Dependent Claim
17 words
An ultrasonic transducer device according to claim 11, wherein each curved surface is a convex arc surface.
Claim 17
Dependent Claim
19 words
An ultrasonic transducer device according to claim 9, wherein the curved surfaces are one of paraboloidal and ellipsoidal surfaces.
Claim 18
Dependent Claim
22 words
An ultrasonic transducer device according to claim 9, wherein the curved surfaces are formed of a plurality of different radii of curvature.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |