Patent US3776409A successfully refreshed from Google Patents.
US3776409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass fiber container and method of construction
Assignee: Owens Corning
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Filing: 1972-01-31
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Granted: 1973-12-04
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Expires: 1992-01-31
Abstract
Abstract A filament wound glass fiber container includes a base and a hollow tubular wall having a unitary resin matrix reinforced with peripherally wound groups of glass fibers. The tubular wall is apportioned in axially aligned sections which incrementally increase in thickness from one end of the container to the other. Each of the wall sections is wound from a different group of glass fibers with the number of fibers in the respective group being progressively larger in proportion to the thickness of the corresponding sections. The windings of each section overlap in the end regions with the windings of adjacent sections to provide continuity of reinforcement through the region where adjacent sections meet.
Inventors
- 👤 L Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:20
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/56; B29C53/58; B29C53/60; B29K; B29K2309/00; B29K2309/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
157 words
A filament wound glass fiber container, comprising: a unitary side wall of hollow tubular configuration having a series of axially aligned sections, each of said sections being of substantially constant thickness along its length, and each successive section in said series being incrementally thicker than the preceding section from a thinnest section at one end of the tubular wall to a thickest section at the other end, sai tubular wall comprising a matrix of hardened resin extending as a unitary mass throughout said wall and reinforcement in the form of generally peripherally wound groups of continuous glass fiber strands in said matrix, all of said sections having the same number of groups of strands wound about their peripheries with the number of strands in the groups of each wall section being proportionally greater in each successive section from the thinnest section of the tubular wall; and a base integrally joined to said tubular wall at one end.
Claim 2
Dependent Claim
157 words
A filament wound glass fiber container, comprising: a unitary side wall of hollow tubular configuration having a series of axially aligned sections, each of said sections being of substantially constant thickness along its length, and each successive section in said series being incrementally thicker than the preceding section from a thinnest section at one end of the tubular wall to a thickest section at the other end, sai tubular wall comprising a matrix of hardened resin extending as a unitary mass throughout said wall and reinforcement in the form of generally peripherally wound groups of continuous glass fiber strands in said matrix, all of said sections having the same number of groups of strands wound about their peripheries with the number of strands in the groups of each wall section being proportionally greater in each successive section from the thinnest section of the tubular wall; and a base integrally joined to said tubular wall at one end.
Claim 3
Dependent Claim
40 words
A filament wound container as described in claim 1, wherein at least some of the windings of glass fiber strands in the end regions of each section partially overlap with the windings in the end regions of the adjacent sections.
Claim 4
Dependent Claim
17 words
A filament container as described in claim 1, wherein said wall sections are generally equal in length.
Claim 5
Dependent Claim
32 words
A filament wound container as described in claim 1, wherein said tubular wall further comprises a layer of resin reinforced with randomly dispersed chopped glass strands adjacent the interior of said container.
Claim 6
Dependent Claim
77 words
A filament wound container as described in claim 1, wherein said groups of glass fiber strands in each of said sections are angularly wound in superimposed layers in said resin matrix, and wherein said groups are wound in at least one layer in an angular direction opposite to the winding of said groups in another layer to form a criss-cross lay of the groups of fibers effective to provide reinforcement in all directions of said resin matrix.
Claim 7
Dependent Claim
23 words
A filament wound container as described in claim 5, wherein each of said wall sections has the same number of layers of windings.
Claim 8
Dependent Claim
50 words
A filament wound container as described in claim 6, wherein the layers of windings in each section partially overlap and are interleaved with the layers of adjacent sections in the end regions where said adjacent sections meet to provide additional strength where the thickness of the tubular wall incrementally changes.
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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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |