Patent US3978894A successfully refreshed from Google Patents.
US3978894A
Expired / Lapsed
US
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Energy absorbing tear-webbing
Assignee: United States Department of the Navy
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Filing: 1973-02-05
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Granted: 1976-09-07
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Expires: 1993-02-05
Abstract
Abstract An improved tear webbing is fabricated of two woven straps offering graduy increasing resistance to tearing of the pile yarn woven between the straps to assure that sequential tearing of only the pile ends will occur; and by providing the technique of snubbing or binding the pile yarn in place around each adjacent weft picks of the webbing so that the pile yarn will tear and discourage slipping that may otherwise cause failure of the straps.
Inventors
- 👤 Jay D. Boone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:17
CPC Classifications
D; D03; D03D; D03D1/00; D03D1/0005
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
163 words
In an energy-absorbing tear webbing comprising at least two independent webbing straps each of which are fabricated of a separate system of woven warp yarns and weft yarns, said webbing straps being detachably secured together in a contiguous face-to-face relation by a plurality of pile tear yarns which are woven simultaneously into each strap and between the straps, the improvement residing in each pile tear yarn being alternately woven over a predetermined plurality of adjacent weft yarns in each strap before crossing over to the other strap, the number of the pile tear yarns that cross between the straps gradually increasing from one end of the webbing to another end of the webbing along the length thereof, whereby any force causing a lateral separation of the webbing straps starting from said one end of the webbing will be gradually absorbed in an increasing magnitude as the number of the pile tear yarns to be broken increases toward said another end of the webbing.
Claim 2
Dependent Claim
163 words
In an energy-absorbing tear webbing comprising at least two independent webbing straps each of which are fabricated of a separate system of woven warp yarns and weft yarns, said webbing straps being detachably secured together in a contiguous face-to-face relation by a plurality of pile tear yarns which are woven simultaneously into each strap and between the straps, the improvement residing in each pile tear yarn being alternately woven over a predetermined plurality of adjacent weft yarns in each strap before crossing over to the other strap, the number of the pile tear yarns that cross between the straps gradually increasing from one end of the webbing to another end of the webbing along the length thereof, whereby any force causing a lateral separation of the webbing straps starting from said one end of the webbing will be gradually absorbed in an increasing magnitude as the number of the pile tear yarns to be broken increases toward said another end of the webbing.
Claim 3
Dependent Claim
158 words
In an energy-absorbing tear webbing comprising at least two independent webbing straps each of which are fabricated of a separate system of woven warp yarns and weft yarns, said webbing straps being detachably secured together in a contiguous face-to-face relation by a plurality of pile yarns which are interwoven simultaneously into each strap and between the straps; the improvement residing in the pile tear yarns being woven alternately over and under each of at least three immediately adjacent weft yarns in alternate and successive portions of both webbing straps, said pile tear yarns being snubbed around and bound to each of the weft yarns in each strap portion before crossing to the other strap; the total number of pile yarns that cross between the webbing straps varying in number along a selected length of the webbing to change the density of the number of pile yarns that are broken in absorbing the tear force separating the webbing straps.
Claim 4
Dependent Claim
158 words
In an energy-absorbing tear webbing comprising at least two independent webbing straps each of which are fabricated of a separate system of woven warp yarns and weft yarns, said webbing straps being detachably secured together in a contiguous face-to-face relation by a plurality of pile yarns which are interwoven simultaneously into each strap and between the straps; the improvement residing in the pile tear yarns being woven alternately over and under each of at least three immediately adjacent weft yarns in alternate and successive portions of both webbing straps, said pile tear yarns being snubbed around and bound to each of the weft yarns in each strap portion before crossing to the other strap; the total number of pile yarns that cross between the webbing straps varying in number along a selected length of the webbing to change the density of the number of pile yarns that are broken in absorbing the tear force separating the webbing straps.
Claim 5
Dependent Claim
34 words
The webbing of claim 2 wherein the total number of adjacent weft yarns encompassed by the pile tear yarn in each webbing portion gradually decrease in number along a selected length of the webbing.
Claim 6
Dependent Claim
40 words
The webbing of claim 2 wherein the total number of pile tear yarns that cross between the webbing straps are gradually increased along the length of the webbing thereby gradually increasing the resistance of the webbing to the tearing force.
Claim 7
Dependent Claim
32 words
The webbing of claim 2 wherein a selected portion of the webbing contains the same number of pile yarns that cross from one strap to the other for a given length thereof.
Claim 8
Dependent Claim
124 words
In a method of fabricating an energy-absorbing tear webbing comprising a pair of independent webbing straps each being fabricated by weaving warp yarns and weft yarns and by simultaneously weaving pile tear yarns into each strap and between the two straps for securing the two straps in contiguous face-to-face relation, the improvement residing in the steps of: successively snubbing the pile yarns in a pattern alternately over and under each adjacent weft yarn of a predetermined number of weft yarns in each webbing strap before passing the pile yarns across to the other webbing strap; successively repeating the pattern; and gradually increasing the number of pile tear yarns that cross from one strap to the other strap over a given length of the webbing.
Claim 9
Dependent Claim
124 words
In a method of fabricating an energy-absorbing tear webbing comprising a pair of independent webbing straps each being fabricated by weaving warp yarns and weft yarns and by simultaneously weaving pile tear yarns into each strap and between the two straps for securing the two straps in contiguous face-to-face relation, the improvement residing in the steps of: successively snubbing the pile yarns in a pattern alternately over and under each adjacent weft yarn of a predetermined number of weft yarns in each webbing strap before passing the pile yarns across to the other webbing strap; successively repeating the pattern; and gradually increasing the number of pile tear yarns that cross from one strap to the other strap over a given length of the webbing.
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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) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |