Patent US4604542A successfully refreshed from Google Patents.
US4604542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Broadband radial vibrator transducer with multiple resonant frequencies
Assignee: Northrop Grumman Corp
•
Filing: 1984-07-25
•
Granted: 1986-08-05
•
Expires: 2004-07-25
Abstract
Abstract A broadband radial vibrator transducer having at least two laminar resonant sections coupled to a radial electromechanical transducer element where each laminar section includes at least two layers. Each resonant section has a mass layer and a compliant member layer where the compliant member layer is fixed between the transducer element and the mass layer. The compliant member allows the resonant section to mechanically resonate along with the transducer element providing at least two resonant frequencies, thereby expanding the bandwidth of the transducer.
Inventors
- 👤 Stephen C. Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:13
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0644; B06B1/0655
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
49 words
A transducer, comprising: a radial electromechanical transducer element having a radiating surface on an outer circumference of said radial electromechanical transducer element; and at least two mechanically resonant sections coupled to the radiating surface of said radial electromechanical transducer element and each mechanically resonant section having a laminar structure.
Claim 2
Dependent Claim
49 words
A transducer, comprising: a radial electromechanical transducer element having a radiating surface on an outer circumference of said radial electromechanical transducer element; and at least two mechanically resonant sections coupled to the radiating surface of said radial electromechanical transducer element and each mechanically resonant section having a laminar structure.
Claim 3
Dependent Claim
34 words
A transducer as recited in claim 1, wherein said mechanically resonant sections each comprise: a compliant member layer coupled to said radial electromechanical transducer element; and a mass layer coupled to said compliant member.
Claim 4
Dependent Claim
14 words
A transducer as recited in claim 2, wherein said compliant member layer is plastic.
Claim 5
Dependent Claim
24 words
A transducer as recited in claim 1, wherein said mechanically resonant sections do not have the same resonant frequency but have different resonant frequencies.
Claim 6
Dependent Claim
24 words
A transducer as recited in claim 1, wherein each mechanically resonant section has more than two layers where compliant layers alternate with mass layers.
Claim 7
Dependent Claim
13 words
A transducer as recited in claim 5, wherein said compliant layers are plastic.
Claim 8
Dependent Claim
18 words
A transducer as recited in claim 1, wherein said radial electromechanical transducer element has a curved radiating face.
Claim 9
Dependent Claim
49 words
A transducer, comprising: transducer means for providing electromechanical conversion in an outward direction on an outer circumferential surface; and at least two resonant means, coupled to the outer circumferential surface of said transducer means, for allowing said transducer to resonate outward at at least first and second resonant frequencies.
Claim 10
Dependent Claim
49 words
A transducer, comprising: transducer means for providing electromechanical conversion in an outward direction on an outer circumferential surface; and at least two resonant means, coupled to the outer circumferential surface of said transducer means, for allowing said transducer to resonate outward at at least first and second resonant frequencies.
Claim 11
Dependent Claim
66 words
A transducer as recited in claim 8, wherein said transducer means and said at least two resonant means each have a mass, the first resonant frequency is governed by the mass of said transducer means and the mass of said at least two resonant means considered together and the second resonant frequency is governed by the mass of said at least two resonant means considered alone.
Claim 12
Dependent Claim
82 words
A transducer as recited in claim 9, wherein said transducer means, one of said at least two resonant means and the other of said at least two resonant means each have a mass, said transducer resonates at at least a third resonant frequency where the second resonant frequency is governed by the mass of one of said two resonant means considered alone and the third resonant frequency is governed by the mass of the other of said two resonant means considered alone.
Claim 13
Dependent Claim
37 words
A transducer as recited in claim 8, wherein a mass of said transducer means and a mass of said at least two resonant means produce said first and second resonant frequencies forming a single operating frequency band.
Claim 14
Dependent Claim
36 words
A transducer as recited in claim 8, wherein a mass of said transducer means and a mass of said at least two resonant means produce said first and second resonant frequencies forming two separate operating bands.
Claim 15
Dependent Claim
43 words
A transducer as recited in claim 8, wherein each resonant means comprises: at least one compliant means, coupled to said transducer means, for allowing resonance at the first and second resonant frequencies; and at least one resonant mass coupled to said compliant means.
Claim 16
Dependent Claim
13 words
A transducer as recited in claim 13, wherein said compliant means comprises plastic.
Claim 17
Dependent Claim
20 words
A transducer as recited in claim 8, wherein said transducer means is a radial transducer having a curved radiating surface.
References Cited (Backward Citations)
US3142035A
Cited
US3230505A
Cited
US3277433A
Cited
US3845333A
Cited
US3952216A
Cited
US4151437A
Cited
US4433399A
Cited
US4373143A
Cited
US4435794A
Cited
US4432080A
Cited
US4525645A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-04 | 1990-02-03 | 1990-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-04 | 1994-02-03 | 1994-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-04 | 1998-02-03 | 1998-08-05 | $7700.00 | Window Closed / Lapsed |