Patent US4296839A successfully refreshed from Google Patents.
US4296839A
Expired / Lapsed
US
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Structurally damped bolt
Assignee: Lockheed Martin Corp
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Filing: 1979-09-26
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Granted: 1981-10-27
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Expires: 1999-09-26
Abstract
Abstract A damping device comprising a first element in the form of a bolt whose central rod portion, as a spring, forms a primary load path between structural elements between which the damping device is mounted, with a damping element of viscoelastic material loaded in shear between a pair of sleeves and forming a secondary load path, in parallel, with the primary load path to damp vibrations in the structural members.
Inventors
- 👤 Robert C. Peller
- 👤 Jack E. Dyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:36
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A structurally damped device for attenuating the vibrations between two structural members and having means for connecting said device to said structural members comprising: means defining a first primary load path designed to take the basic load between said structural elements; and means defining a second structural load path in parallel with said primary load path; said means for defining a primary load path is a spring comprising a bolt having end bosses integral therewith and wherein said means for defining a secondary load path comprises sleeves of material one attached to each of the end bosses and placed in overlapping relationship with viscoelastic damping material located between the sleeves and loaded in shear.
Claim 2
Dependent Claim
114 words
A structurally damped device for attenuating the vibrations between two structural members and having means for connecting said device to said structural members comprising: means defining a first primary load path designed to take the basic load between said structural elements; and means defining a second structural load path in parallel with said primary load path; said means for defining a primary load path is a spring comprising a bolt having end bosses integral therewith and wherein said means for defining a secondary load path comprises sleeves of material one attached to each of the end bosses and placed in overlapping relationship with viscoelastic damping material located between the sleeves and loaded in shear.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-26 | 1985-04-27 | 1985-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-26 | 1989-04-27 | 1989-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-26 | 1993-04-27 | 1993-10-27 | $7700.00 | Window Closed / Lapsed |