US3871409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced synthetic pipe wall construction
Assignee: Owens Corning
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Filing: 1973-05-21
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Granted: 1975-03-18
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Expires: 1993-05-21
Abstract
Abstract A fluid retaining wall or pipe particularly suitable for underground installation having a reinforced thermosetting resin construction. The wall of the pipe consists essentially of a thermosetting resin matrix, chopped glass fibers and a pulverulent filler such as sand distributed through out the matrix and filament wound, continuous glass fibers within the resin matrix, preferably distributed primarily adjacent the interior and exterior surfaces of the cylindical wall. The disclosed method includes applying the resin matrix in a liquid form to a continuously rotating cylindrical form, distributing the sand and chopped glass fibers within the matrix, winding the glass filaments helically in the matrix, and heating the pipe to cure the matrix.
Inventors
- 👤 Agnar Gilbu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:30
CPC Classifications
F; F16; F16L; F16L9/00; F16L9/16; B; B32; B32B; B32B1/00; B32B1/08; B32B27/00; B32B27/06; B32B27/08; B32B27/18; B32B27/20; B32B2260/00; B32B2260/02; B32B2260/021; B32B2260/04; B32B2260/046; B32B2597/00; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/24994
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
84 words
IN A WALL FOR UNDERGROUND INSTALLATION AND THE LIKE AND SEVING TO CONFINE A LIQUID, A WALL STRUCTURE COMPRISING: A. A THERMOSETTING RESIN MATRIX CURED AND COMPRISING FROM ABOUT 30 TO 40 PERCENT BY WEIGHT OF SAID WALL, B. CHOOPED GLASS FIBERS RANDOMLY ORIENTED AND SUBSTANTIALLY UNIFORMLY DISTRIBUTED THROUGH SAID RESIN MATRIX, COMPRISING FROM ABOUT 10 TO 20 PERCENT BY WEIGHT OF SAID WALL; C. A PULVERULENT FILLER UNIFORMLY DISTRIBUTED IN SAID RESIN MATRIX COMPRISING ABOUT 15 TO 60 PERCENT OF SAID WALL, AND
Claim 2
Dependent Claim
84 words
IN A WALL FOR UNDERGROUND INSTALLATION AND THE LIKE AND SEVING TO CONFINE A LIQUID, A WALL STRUCTURE COMPRISING: A. A THERMOSETTING RESIN MATRIX CURED AND COMPRISING FROM ABOUT 30 TO 40 PERCENT BY WEIGHT OF SAID WALL, B. CHOOPED GLASS FIBERS RANDOMLY ORIENTED AND SUBSTANTIALLY UNIFORMLY DISTRIBUTED THROUGH SAID RESIN MATRIX, COMPRISING FROM ABOUT 10 TO 20 PERCENT BY WEIGHT OF SAID WALL; C. A PULVERULENT FILLER UNIFORMLY DISTRIBUTED IN SAID RESIN MATRIX COMPRISING ABOUT 15 TO 60 PERCENT OF SAID WALL, AND
Claim 3
Dependent Claim
65 words
The wall construction defined in claim 1, characterized in that said exterior and interior portions of said wall each comprise about 20 percent of the total radial dimension of said wall, and about 80 percent of the total weight percent of said filament wound fibers being concentrated in said resin matrix wall portions, the chopped fiber and filler substantially evenly distributed in said resin matrix.
Claim 4
Dependent Claim
17 words
The wall construction defined in claim 2, wherein the minimum weight percent of resin is 40 percent.
Claim 5
Dependent Claim
45 words
The wall construction defined in claim 1, characterized in that said pulverulent filler is sand and comprises about 20 to 50 percent by weight of the total weight of said wall and said chopped glass fibers comprise about 15 percent by weight of said wall.
Claim 6
Dependent Claim
154 words
In a wall for underground installation and serving to confine a liquid, a wall structure comprising: a. a resin matrix consisting essentially of a thermosetting resin cured to a hardened state and comprising from 30 to 40 percent by weight of said wall; b. from 15 to 45 percent by weight total glass fibers embedded in said matrix, at least 5 percent by weight filament wound continuous fibers and at least 15 percent by weight chopped glass fibers embedded in said resin matrix, and c. from 20 to 50 percent sand embedded in said matrix, the proportions of sand and glass fibers varying throughout the thickness of said wall in inverse proportion to one another, the concentration of sand being greatest in the central portion of said wall and the concentration of glass fibers being greater at the interior and exterior portions of said wall and least at the central portion of said wall.
Claim 7
Dependent Claim
154 words
In a wall for underground installation and serving to confine a liquid, a wall structure comprising: a. a resin matrix consisting essentially of a thermosetting resin cured to a hardened state and comprising from 30 to 40 percent by weight of said wall; b. from 15 to 45 percent by weight total glass fibers embedded in said matrix, at least 5 percent by weight filament wound continuous fibers and at least 15 percent by weight chopped glass fibers embedded in said resin matrix, and c. from 20 to 50 percent sand embedded in said matrix, the proportions of sand and glass fibers varying throughout the thickness of said wall in inverse proportion to one another, the concentration of sand being greatest in the central portion of said wall and the concentration of glass fibers being greater at the interior and exterior portions of said wall and least at the central portion of said wall.
Claim 8
Dependent Claim
44 words
The wall construction defined in claim 5, characterized in that the total weight percent of said chopped glass fiber is about 10 to 20 percent and the total weight percent of said filament wound fibers is about 15 to 25 percent of said wall.
Claim 9
Dependent Claim
50 words
The wall construction defined in claim 5, characterized in that said interior and exterior portions of said wall each comprise about 20 percent of the total dimension of said wall and at least 60 percent of the total weight percent of said filament fibers are concentrated in said wall portions.
Claim 10
Dependent Claim
93 words
A drain pipe construction as defined in claim 5, characterized in that said exterior and interior portions of said wall each comprise about 20 percent of the total dimension of said wall and at least 90 percent of the total weight percent of said filament wound fibers and about 80 percent of the total weight percent of said chopped fibers are concentrated in said interior and exterior portions and about 80 percent of the total weight percent of said sand is concentrated in the central portion, between said interior and exterior wall portions.
Claim 11
Dependent Claim
83 words
A low pressure pipe as defined in claim 5, characterized in that said interior and exterior portions of said wall each comprise about 20 percent of the total radial dimension of said wall, and about 80 percent of the total weight percent of said filament fibers and about 60 percent of said chopped fibers are concentrated in said interior and exterior wall portions and about 80 percent of said sand is concentrated in the central portion, between said interior and exterior wall portions.
Claim 12
Dependent Claim
86 words
A high pressure pipe as defined in claim 5, characTerized in that said interior and exterior portions of said wall each comprise about 20 percent of the total dimension of said wall, and about 60 percent of the total weight percent of said filament windings and about 40 percent of the total percent of said chopped fibers are located within said interior and exterior wall portions and about 70 percent of said sand is concentrated in the central portion between said interior and exterior wall portions.
Claim 13
Dependent Claim
91 words
In a composite wall structure suitable for confining a liquid in an underground installation having opposed surfaces, comprising: a. a thermosetting resin matrix, b. randomly oriented chopped glass fibers, c. a pulverulent filler, and d. filament wound, substantially continous glass fibers, wherein said resin and chopped glass fibers are substantially uniformly distributed throughout said wall structure, said pulverulent filler is relatively concentrated in the center portion of said wall structure in said resin matrix and said continuous wound glass fibers are concentrated adjacent said opposed wall surfaces in said resin matrix.
Claim 14
Dependent Claim
91 words
In a composite wall structure suitable for confining a liquid in an underground installation having opposed surfaces, comprising: a. a thermosetting resin matrix, b. randomly oriented chopped glass fibers, c. a pulverulent filler, and d. filament wound, substantially continous glass fibers, wherein said resin and chopped glass fibers are substantially uniformly distributed throughout said wall structure, said pulverulent filler is relatively concentrated in the center portion of said wall structure in said resin matrix and said continuous wound glass fibers are concentrated adjacent said opposed wall surfaces in said resin matrix.
Claim 15
Dependent Claim
25 words
The wall structure defined in claim 11, characterized in that said center portion comprises about 60 percent of the total thickness of said wall structure.
Claim 16
Dependent Claim
49 words
The wall structure defined in claim 11, wherein said thermosetting resin matrix comprises from about 30 to 40 percent by weight of said wall, said glass fibers comprise about 15 to 50 percent of said wall and said pulverulent filler comprises about 15 to 60 percent of said wall.
References Cited (Backward Citations)
US912318A
Cited
US3520749A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |