US3804698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesively releasable and reusable shock load absorbing system
Assignee: United States Department of the Navy
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Filing: 1970-05-25
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Granted: 1974-04-16
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Expires: 1990-05-25
Abstract
Abstract A shock-absorbing strap system including a tensile load-bearing basic strap which has a looped portion secured by an adhesive connection designed to fail in above-load conditions to absorb the initial shock before transferring the load to the basic strap.
Inventors
- 👤 J Kinloch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:05
CPC Classifications
B; B60; B60R; B60R22/00; B60R22/28; F; F16; F16F; F16F7/00; F16F7/12; A; A62; A62B; A62B35/00; A62B35/04; Y; Y10; Y10S; Y10S2/00; Y10S2/908; Y10S2/909; Y10T; Y10T156/00; Y10T156/11; Y10T156/1105; Y10T156/1168; Y10T428/00; Y10T428/24; Y10T428/2419; Y10T428/24215; Y10T428/24628; Y10T428/24636; Y10T428/24645; Y10T428/24802; Y10T428/24826; Y10T428/24942
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
153 words
A shock-absorbing parachute webbing strap system comprising solely: a basic tensile load bearing webbing strap of a given length having a predetermined tensile yield strength, at least one intermediate and intermittent portion of said strap having a loop; at least one secondary strap extending longitudinally the basic strap to bridge said looped portion and having a shorter length than the basic strap; said secondary strap having a lesser yield strength than that of the basic strap; contiguous portions of both straps on each side of the looped portion being secured together by an adhesive having a shear strength less than the yield strength of the basic strap; whereby application of an above-normal tensile shock load on said strap system causes the secondary strap to elongate to absorb the initial shock until a predetermined magnitude of load is reached to cause the adhesive bond to fail transferring the entire load on the basic strap.
Claim 2
Dependent Claim
153 words
A shock-absorbing parachute webbing strap system comprising solely: a basic tensile load bearing webbing strap of a given length having a predetermined tensile yield strength, at least one intermediate and intermittent portion of said strap having a loop; at least one secondary strap extending longitudinally the basic strap to bridge said looped portion and having a shorter length than the basic strap; said secondary strap having a lesser yield strength than that of the basic strap; contiguous portions of both straps on each side of the looped portion being secured together by an adhesive having a shear strength less than the yield strength of the basic strap; whereby application of an above-normal tensile shock load on said strap system causes the secondary strap to elongate to absorb the initial shock until a predetermined magnitude of load is reached to cause the adhesive bond to fail transferring the entire load on the basic strap.
Claim 3
Dependent Claim
43 words
The strap system of claim 1 wherein: the looped portion is folded with the contiguous overlapping contacting surfaces also secured together by an adhesive having a different predetermined shear strength whereby shock absorption is achieved gradually by a peeling-off of the overlapping surfaces.
Claim 4
Dependent Claim
34 words
The strap system of claim 1 wherein: two secondary straps are provided one on each side of the looped portion of the basic strap to provide a sandwiched relationship to provide a release connection.
Claim 5
Dependent Claim
15 words
The strap system of claim 3 wherein: the secondary straps have different tensile yield strengths.
Claim 6
Dependent Claim
18 words
The strap system of claim 3 wherein: the secondary straps and their respective adhesives have different yield strengths.
Claim 7
Dependent Claim
43 words
The strap system of claim 3 wherein: a plurality of spaced release connections are provided along the basic strap system, each area having a different shear strength to provide a sequential absorption of the load before it is transferred to the basic strap.
Claim 8
Dependent Claim
26 words
The strap system of claim 6 wherein: the sequential action is provided by varying the extent of contacting area of the straps to be adhesive secured.
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) | 1977-04-15 | 1977-10-15 | 1978-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-15 | 1981-10-15 | 1982-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-15 | 1985-10-15 | 1986-04-16 | $7700.00 | Window Closed / Lapsed |