US4138285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filament rod construction and method of forming the same
Assignee: Fiber Glass Systems Inc
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Filing: 1977-09-12
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Granted: 1979-02-06
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Expires: 1997-09-12
Abstract
Abstract A rod construction has an inner core of high tensile strength such as a rod or bar of high tensile steel. The reinforcement core has a plurality of surface indentations, preferably uniformly arranged at spaced intervals along the length of the core periphery. Layers of tensioned longitudinal and spiral filaments embedded in a resin matrix are formed about the core periphery so as to provide a rod of excellent strength and corrosion resistance. Also a rod is formed by spirally winding on a rotating assemblage of longitudinal filaments.
Inventors
- 👤 Vesta F. Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:33
CPC Classifications
F; F16; F16C; F16C7/00; F16C7/02; F16C7/026; B; B29; B29C; B29C53/00; B29C53/56; B29C53/58; B29C53/583; B29C53/585; B29C53/80; B29C53/8008; B29C53/805; F16C3/00; F16C3/02; F16C3/026; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2936
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
207 words
A method for forming a solid rod construction of high tensile strength, comprising winding a resin-saturated spiral layer of filaments of high tensile strength under tension transversely to an innermost rotating longitudinally arranged assemblage of substantially parallel filaments of high tensile strength under tension; said filaments being of substantially equal length; winding said spiral layer in discrete strata initially contacting substantially oppositely disposed peripheral portions of said rotating longitudinal assemblage; said spiral strata being wound in the same direction of rotation while having the forces tending to urge such assemblage into a non-linear condition exerted on said longitudinal assemblage by said strata substantially oppositely disposed to each other; each of said discrete strata of said spiral layers being would simultaneously and in adjacent relation along the length of the longitudinal assemblage of substantially parallel-filaments so as to exert substantially opposite forces on the rotating longitudinal assemblage whereby the latter assemblage remains substantially linear along its entire length during rod formation; and applying additional layers of substantially parallel longitudinal and transverse filaments of high tensile strength alternately, under tension, until a rod of desired dimensions is formed; said parallel filaments and spiral filaments being saturated with said resin so as to define a solid, substantially void-free rod construction.
Claim 2
Independent Claim
207 words
A method for forming a solid rod construction of high tensile strength, comprising winding a resin-saturated spiral layer of filaments of high tensile strength under tension transversely to an innermost rotating longitudinally arranged assemblage of substantially parallel filaments of high tensile strength under tension; said filaments being of substantially equal length; winding said spiral layer in discrete strata initially contacting substantially oppositely disposed peripheral portions of said rotating longitudinal assemblage; said spiral strata being wound in the same direction of rotation while having the forces tending to urge such assemblage into a non-linear condition exerted on said longitudinal assemblage by said strata substantially oppositely disposed to each other; each of said discrete strata of said spiral layers being would simultaneously and in adjacent relation along the length of the longitudinal assemblage of substantially parallel-filaments so as to exert substantially opposite forces on the rotating longitudinal assemblage whereby the latter assemblage remains substantially linear along its entire length during rod formation; and applying additional layers of substantially parallel longitudinal and transverse filaments of high tensile strength alternately, under tension, until a rod of desired dimensions is formed; said parallel filaments and spiral filaments being saturated with said resin so as to define a solid, substantially void-free rod construction.
Claim 3
Dependent Claim
16 words
The method of claim 1 in which said filaments of high tensile strength are glass filaments.
Claim 4
Independent Claim
185 words
A method for forming a solid rod construction comprising applying longitudinal filaments of high tensile strength under tension about the periphery of a solid rod core having high tensile strength and spaced surface indentations, said filaments being arranged substantially parallel to the longitudinal axis of said core; anchoring opposed end portions of said filaments under tension; said filaments being in engagement with the periphery of said core in the tensioned, anchored condition; increasing the tension in said longitudinal filaments by winding spirals of filaments of high tensile strength under tension transversely to the axis of said core so as to urge the longitudinal filaments into the core surface indentations; impregnating said longitudinal and spiral filaments with a curable resin whereby a substantially void-free relation is assumed between said core and an overlying shell defined by said filaments, applying additional alternate layers of resin-impregnated longitudinal and spiral filaments of high tensile strength under tension until said core indentations are filled and a cylindrical rod of desired dimensions is formed, and curing said resin with said filaments in the tensioned state into a solid, substantially void-free rod.
Claim 5
Independent Claim
185 words
A method for forming a solid rod construction comprising applying longitudinal filaments of high tensile strength under tension about the periphery of a solid rod core having high tensile strength and spaced surface indentations, said filaments being arranged substantially parallel to the longitudinal axis of said core; anchoring opposed end portions of said filaments under tension; said filaments being in engagement with the periphery of said core in the tensioned, anchored condition; increasing the tension in said longitudinal filaments by winding spirals of filaments of high tensile strength under tension transversely to the axis of said core so as to urge the longitudinal filaments into the core surface indentations; impregnating said longitudinal and spiral filaments with a curable resin whereby a substantially void-free relation is assumed between said core and an overlying shell defined by said filaments, applying additional alternate layers of resin-impregnated longitudinal and spiral filaments of high tensile strength under tension until said core indentations are filled and a cylindrical rod of desired dimensions is formed, and curing said resin with said filaments in the tensioned state into a solid, substantially void-free rod.
Claim 6
Dependent Claim
55 words
The method of claim 3 in which said resin is cured at substantially room temperature until said resin is set, continuing the cure at an elevated temperature controlled so as not to effect relative movement between the core and reinforced resin covering whereby an integral rod construction free of fissures and internal voids is assured.
Claim 7
Dependent Claim
53 words
The method of claim 3 in which an annular reinforcement, concentric with said core axis, is embedded in one end of said rod reinforced shell adjacent a core end limit, and female threads are formed about the inner periphery thereof adjacent the reinforcement whereby the shear strength of said female threads is improved.
Claim 8
Dependent Claim
40 words
The method of claim 5 in which male threads are formed about the external periphery of the rod end opposed to said one end by molding a hardenable epoxy resin composition thereover with the assistance of a male thread form.
Claim 9
Dependent Claim
66 words
The method of claim 5 in which a female thread form is placed adjacent one end of said core end limit whereafter female threads are formed thereover; said annular reinforcement being formed about said formed female threads, and hardenable epoxy resin is packed into the interval between the inner periphery of said annular reinforcement and said underlying rod portion to insure the absence of voids therebetween.
Claim 10
Dependent Claim
41 words
The method of claim 5 in which said annular reinforcement comprises a plate of high tensile steel which is formed about a female thread form abutted against one end of said core after female threads have been formed over said form.
Claim 11
Dependent Claim
45 words
The method of claim 8 in which said plate is welded snugly about the female threads which have been formed about the thread form and has projections formed on at least one surface thereof to embed said plate in the reinforced shell of said rod.
Claim 12
Dependent Claim
13 words
The method of claim 3 in which said core comprises a steel rod.
Claim 13
Dependent Claim
27 words
The method of claim 3 in combination with the steps of forming male and female threads of curable resin on the opposed ends of said rod construction.
Claim 14
Dependent Claim
16 words
The method of claim 16 in which said filaments of high tensile strength are glass filaments.
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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) | 1982-02-05 | 1982-08-07 | 1983-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-05 | 1986-08-07 | 1987-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-05 | 1990-08-07 | 1991-02-06 | $7700.00 | Window Closed / Lapsed |