US4386612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic transmitter
Assignee: GESELLSCHAFT fur STRAHLEN- und UMWELTFORSCHUNG MB MUNCHEN INGOLSTADER LANDSTR 1 D-8042 NEUHERBERG GERMANY
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Filing: 1981-10-05
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Granted: 1983-06-07
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Expires: 2001-10-05
Abstract
Abstract In an ultrasonic wave transmitter for generating spatially incoherent ultrasonic radiation, which transmitter includes a source of ultrasonic acoustic radiation, there are provided a member holding a fluid medium in a region exposed to the acoustic radiation, a plurality of particles immersed in the medium and having a diameter of the order of magnitude of the wavelength of the acoustic radiation and an acoustic radiation impedance different from that of the medium, and a device for subjecting the particles to an irregular movement in the medium and within the region.
Inventors
- 👤 Ulrich Roder
- 👤 Harald Seidlitz
- 👤 Christof Scherg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:42
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/18
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
89 words
In an ultrasonic wave transmitter for generating spatially incoherent ultrasonic radiation, said transmitter including a source of ultrasonic acoustic radiation, wherein the improvement comprises: means holding a fluid medium in a region exposed to the acoustic radiation; a plurality of particles immersed in said medium and having a diameter of the order of magnitude of the wavelength of the acoustic radiation and an acoustic radiation impedance different from that of said medium; and means for subjecting said particles to an irregular movement in said medium and within said region.
Claim 2
Dependent Claim
89 words
In an ultrasonic wave transmitter for generating spatially incoherent ultrasonic radiation, said transmitter including a source of ultrasonic acoustic radiation, wherein the improvement comprises: means holding a fluid medium in a region exposed to the acoustic radiation; a plurality of particles immersed in said medium and having a diameter of the order of magnitude of the wavelength of the acoustic radiation and an acoustic radiation impedance different from that of said medium; and means for subjecting said particles to an irregular movement in said medium and within said region.
Claim 3
Dependent Claim
44 words
An arrangement as defined in claim 1 wherein said means holding a fluid medium comprise a chamber enclosing said region and containing said medium and said particles, said chamber having at least one window disposed for passage of spatially incoherent radiation from said region.
Claim 4
Dependent Claim
21 words
An arrangement as defined in claim 2 wherein said window has an area corresponding to that of the acoustic radiation source.
Claim 5
Dependent Claim
44 words
An arrangement as defined in claim 2 wherein said means for subjecting said particles to an irregular movement comprise at least one inlet and one outlet associated with said chamber for respectively introducing said medium into and conducting said medium away from said region.
Claim 6
Dependent Claim
21 words
An arrangement as defined in claim 2 wherein said at least one window is constituted by a translucent ground glass sheet.
Claim 7
Dependent Claim
28 words
An arrangement as defined in claim 1 wherein said means for subjecting said particles to an irregular movement comprise means for imparting a turbulent movement to said medium.
Claim 8
Dependent Claim
19 words
An arrangement as defined in claim 1 wherein said medium is water and said particles are made of polystyrene.
References Cited (Backward Citations)
US4153894A
Cited
US4276885A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-06 | 1986-12-06 | 1987-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-06 | 1990-12-06 | 1991-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-06 | 1994-12-06 | 1995-06-07 | $7700.00 | Window Closed / Lapsed |