US3675746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact energy absorber
Assignee: United States Atomic Energy Commission
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Filing: 1970-10-23
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Granted: 1972-07-11
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Expires: 1990-10-23
Abstract
Abstract This invention relates to a deformable impact energy absorber consisting of a plurality of unattached tubes confined within a larger tubulation. During an impact loading the resistance to deformation increases with deformation.
Inventors
- 👤 Alvin R Irvine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:58
CPC Classifications
F; F16; F16F; F16F7/00; F16F7/12; F16F7/121
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
96 words
A deformable impact energy absorbing device comprising an elongated metal tubulation, and a quantity of discrete metal tubes of essentially uniform diameter disposed within said tubulation in a side-by-side abutting relationship with one another and with the radially outermost tubes of said plurality of tubes being contiguous to said tubulation, said tubes being of a quantity corresponding to the maximum number of tubes disposable in said tubulation and having essentially similar wall thickness with the latter being less than that which would cause the tubulation to fail under tension when subjected to a crosssectional-area-Decreasing impact loading.
Claim 2
Dependent Claim
96 words
A deformable impact energy absorbing device comprising an elongated metal tubulation, and a quantity of discrete metal tubes of essentially uniform diameter disposed within said tubulation in a side-by-side abutting relationship with one another and with the radially outermost tubes of said plurality of tubes being contiguous to said tubulation, said tubes being of a quantity corresponding to the maximum number of tubes disposable in said tubulation and having essentially similar wall thickness with the latter being less than that which would cause the tubulation to fail under tension when subjected to a crosssectional-area-Decreasing impact loading.
Claim 3
Dependent Claim
52 words
The deformable impact energy absorbing device claimed in claim 1, wherein said tubulation and said tubes are of stainless steel, said tubulation has an inner diameter in the range of 1.25 to 6 inches, and said tubes have an outer diameter of 0.375 inch and a wall thickness of about 0.065 inch.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |