US3087565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for damping
Assignee: RTX BBN Technologies Corp
•
Filing: 1957-04-23
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Granted: 1963-04-30
•
Expires: 1977-04-23
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward M Kerwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:05
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; F; F16; F16F; F16F1/00; F16F1/36; F16F1/3605; F16F1/373; F16F1/377; F16F1/42; F16F1/52; E04B1/84; E04B2001/8457; E04B2001/8461; E04B2001/8476; E04B2001/848; E04B2001/849; F16F2236/00; F16F2236/12; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
IN COMBINATION WITH A SURFACE SUBJECT TO FLEXURAL MOVEMENTS TO BE DAMPED, A THIN DAMPING LAYER OF MECHANICALLY EXTENSIBLE AND CONTRACTABLE VISCO-ELASTIC MATERIAL ARRANGED GENERALLY PARALLEL TO SAID SURFACE, AND A MECHANICALLY STIFF SPACER MUCH THICKER THAN SAID LAYER ARRANGED BETWEEN AND FIRMLY SECURED TO SAID LAYER AND SAID SURFACE FOR COUPLING VIBRATIONS OF SAID SURFACE TO SAID DAMPING LAYER TO CAUSE SAID DAMPING LAYER TO EXTEND AND CONTRACT, SAID DAMPING LAYER BEING FREE OF CONSTRAINT EXCEPT FOR THAT PROVIDED BY SAID SPACER, SAID DAMPING LAYER HAVING A MECHANICAL LOSS FACTOR GREATER THAN THAT OF SAID SURFACE AND HAVING A COMPLEX ELASTIC MODULUS, THE EXTENSIONAL STIFFNESS OF SAID SPACER BEING SUBSTANTIALLY GREATER IN A DIRECTION NORMAL TO SAID SURFACE THAN IN A DIRECTION PARALLEL THERETO, THE SHEAR STIFFNESS OF SAID SPACER BEING SUBSTANTIALLY GREATER THAN THAT OF SAID DAMPING LAYER, WHEREBY THE MECHANICAL ENERGY LOSSES IN SAID DAMPING LAYER ARE SUBSTANTIALLY GREATER THAN OBTAINED IN THE ABSENCE OF SAID STIFF SPACER.
Claim 2
Dependent Claim
161 words
IN COMBINATION WITH A SURFACE SUBJECT TO FLEXURAL MOVEMENTS TO BE DAMPED, A THIN DAMPING LAYER OF MECHANICALLY EXTENSIBLE AND CONTRACTABLE VISCO-ELASTIC MATERIAL ARRANGED GENERALLY PARALLEL TO SAID SURFACE, AND A MECHANICALLY STIFF SPACER MUCH THICKER THAN SAID LAYER ARRANGED BETWEEN AND FIRMLY SECURED TO SAID LAYER AND SAID SURFACE FOR COUPLING VIBRATIONS OF SAID SURFACE TO SAID DAMPING LAYER TO CAUSE SAID DAMPING LAYER TO EXTEND AND CONTRACT, SAID DAMPING LAYER BEING FREE OF CONSTRAINT EXCEPT FOR THAT PROVIDED BY SAID SPACER, SAID DAMPING LAYER HAVING A MECHANICAL LOSS FACTOR GREATER THAN THAT OF SAID SURFACE AND HAVING A COMPLEX ELASTIC MODULUS, THE EXTENSIONAL STIFFNESS OF SAID SPACER BEING SUBSTANTIALLY GREATER IN A DIRECTION NORMAL TO SAID SURFACE THAN IN A DIRECTION PARALLEL THERETO, THE SHEAR STIFFNESS OF SAID SPACER BEING SUBSTANTIALLY GREATER THAN THAT OF SAID DAMPING LAYER, WHEREBY THE MECHANICAL ENERGY LOSSES IN SAID DAMPING LAYER ARE SUBSTANTIALLY GREATER THAN OBTAINED IN THE ABSENCE OF SAID STIFF SPACER.
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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) | 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 |