US3974475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for focusing ultrasonic waves in a focal line
Assignee: Kontron Inc
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Filing: 1974-08-28
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Granted: 1976-08-10
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Expires: 1994-08-28
Abstract
Abstract An apparatus for focusing ultrasonic waves in a focal line by an ultrasonic optical system having at least one rotation-symmetrical, non-spherical acoustical reflection surface which together with an ultrasonic transducer element transmits an at least partially convergent ultrasonic field having an annular cross-section.
Inventors
- 👤 Christoph Benedikt Burckhardt
- 👤 Pierre-Andre Grandchamp
- 👤 Heinz Hoffmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:20
CPC Classifications
A; A61; A61B; A61B8/00; A61B8/42; A61B8/4272; A61B8/4281; A61B8/44; A61B8/4483; G; G10; G10K; G10K11/00; G10K11/18; G10K11/26; G10K11/28; G10K11/32; H; H04; H04B; H04B11/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
37 words
A transducer assembly for transmitting a substantially convergent ultrasonic field focusing in a focal line, comprising an annular arrangement of ultrasonic transducers, the operating surfaces of which define a conical transmitting surface inclined towards said focal line.
Claim 2
Dependent Claim
37 words
A transducer assembly for transmitting a substantially convergent ultrasonic field focusing in a focal line, comprising an annular arrangement of ultrasonic transducers, the operating surfaces of which define a conical transmitting surface inclined towards said focal line.
Claim 3
Dependent Claim
20 words
Apparatus according to claim 1 wherein the annular transducer arrangement is composed of a plurality of sectors of an annulus.
Claim 4
Dependent Claim
67 words
Apparatus according to claim 1 wherein said transducer assembly further includes an annular base of substantially U-shaped cross-section which defines an annular recess opening in the direction of the focal line and wherein said annular transducer arrangement is composed of a plurality of transducer sectors arranged in said recess, each of which sectors has the transmitting surface thereof inclined towards the axis of said annular transducer assembly.
Claim 5
Dependent Claim
15 words
Apparatus according to claim 3 wherein said annular transducer arrangement includes ultrasonic transducer receiving means.
Claim 6
Dependent Claim
17 words
Apparatus according to claim 1 wherein the aperture of the annular transducer assembly is greater than 6°.
References Cited (Backward Citations)
US2457393A
Cited
US2399820A
Cited
US2993558A
Cited
US3136381A
Cited
US3451260A
Cited
US3616682A
Cited
US3599747A
Cited
US3686115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |