US3087568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibration-damped structure
Assignee: RTX BBN Technologies Corp
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Filing: 1959-03-23
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Granted: 1963-04-30
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Expires: 1979-03-23
Abstract
No abstract record available.
Inventors
- 👤 Kurtze Guenther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:45
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/30; E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/86; E04B2001/8423; E04B2001/8457; E04B2001/8461; Y; Y10; Y10S; Y10S297/00; Y10S297/01; Y10T; Y10T428/00; Y10T428/24; Y10T428/24174; Y10T428/24182
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
AN ACOUSTIC PANEL FOR DAMPING A PREDETERMINED ACOUSTIC FREQUENCY F WITH A MAXIMUM DEGREE OF DAMPING AND FREQUENCIES ABOVE AND BELOW SAID PREDETERMINED FREQNENCY WITH SUBSTANTIAL, BUT LASSER DAMPING, COMPRISING A PAIR OF LAYERS OF STILL STEEL-LIKE SHEET MATERIAL SPACED APART, AND A BODY OF VISCOUS LIQUID-OIL-LIKE MATERIAL SPACED TWEEN AND CONTINUOUSLY CONTACTING SAID LAYERS, BOTH SAID LAYERS BEING MUCH MORE RIGID THAN SAID VISCOUS MATERIAL, ONE OF SAID LAYERS HAVING AN OVERALL BENDING STIFFNESS SUBSTANTIALLY GREATER THAN THE OVERALL BENDING STIFFNESS OF THE OTHER LAYER, WHEREBY THE ACOUSTIC BENDING WAVE PROPAGATING VELOCITY C1 OF ONE LAYER IS SUBSTANTIALLY GREATER THAN THE ACOUSTIC BENDING WAVE PROPAGATING VELOCITY C2 OF THE OTHER LAYER AND THE PHASES OF ACOUSTIC VIBRATIONS ALONG SAID LAYERS ARE DIFFERENT, SAID PANEL HAVING MAXIMUN DAMPING AT SAID PREDETERMINED ACOUSTIC FREQUENCY DETERMINED SUBSTANTIALLY BY THE RELATIONSHIP:
Claim 2
Dependent Claim
138 words
AN ACOUSTIC PANEL FOR DAMPING A PREDETERMINED ACOUSTIC FREQUENCY F WITH A MAXIMUM DEGREE OF DAMPING AND FREQUENCIES ABOVE AND BELOW SAID PREDETERMINED FREQNENCY WITH SUBSTANTIAL, BUT LASSER DAMPING, COMPRISING A PAIR OF LAYERS OF STILL STEEL-LIKE SHEET MATERIAL SPACED APART, AND A BODY OF VISCOUS LIQUID-OIL-LIKE MATERIAL SPACED TWEEN AND CONTINUOUSLY CONTACTING SAID LAYERS, BOTH SAID LAYERS BEING MUCH MORE RIGID THAN SAID VISCOUS MATERIAL, ONE OF SAID LAYERS HAVING AN OVERALL BENDING STIFFNESS SUBSTANTIALLY GREATER THAN THE OVERALL BENDING STIFFNESS OF THE OTHER LAYER, WHEREBY THE ACOUSTIC BENDING WAVE PROPAGATING VELOCITY C1 OF ONE LAYER IS SUBSTANTIALLY GREATER THAN THE ACOUSTIC BENDING WAVE PROPAGATING VELOCITY C2 OF THE OTHER LAYER AND THE PHASES OF ACOUSTIC VIBRATIONS ALONG SAID LAYERS ARE DIFFERENT, SAID PANEL HAVING MAXIMUN DAMPING AT SAID PREDETERMINED ACOUSTIC FREQUENCY DETERMINED SUBSTANTIALLY BY THE RELATIONSHIP:
References Cited (Backward Citations)
US1193013A
Cited
US2407400A
Cited
US2724670A
Cited
US2850109A
Cited
GB754299A
Cited
FR1135422A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-29 | 1966-10-29 | 1967-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-29 | 1970-10-29 | 1971-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-29 | 1974-10-29 | 1975-04-30 | $7700.00 | Window Closed / Lapsed |