Patent US1624615A successfully refreshed from Google Patents.
US3661294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retaining wall for fluids and method for production
Assignee: Owens Corning
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Filing: 1970-08-10
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Granted: 1972-05-09
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Expires: 1990-08-10
Abstract
Abstract A composite wall of reinforced synthetic resin, for retaining both gases and liquids, that is particularly adapted for underground use in gasoline storage tanks, which are resistant to external compression forces; such as, water flooded earth. The wall is characterized by a very high stiffness factor, produced by a combination of spaced ribs of filament wound material and that are hollow, retained on top of a chopped strand-resin wall, where the chopped strand bridges the spaces between the ribs. A process involving the steps of forming a tank end cap on a mandrel and thereafter supporting the end cap in space and laying up a resin-rich wall layer of chopped strand and resin in joined relation to the end cap, and curing the wall partially; then forming over the outer surface of the wall a hollow shell structure which comprises a combination of woven roving and filament wound layers superimposed and saturated with wet resin. Then completely curing the composite wall to produce a monolithic structure.
Inventors
- 👤 Lee E Pearson
- 👤 Jeri O Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:01
CPC Classifications
B; B65; B65D; B65D90/00; B65D90/02; B65D90/029; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1314; Y10T428/1352; Y10T428/1369
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
178 words
In a storage vessel of the class described and having end caps closing the ends of an essentially cylindrical wall, the cylindrical wall consisting essentially of hardened matrix material containing discrete lengths of line-type reinforcement material, the matrix being present in a predominate amount, a plurality of circumferentially extending, substantially hollow, ribs superimposed upon and spaced along the outer surface of said cylindrical wall, each rib being defined by a plateau surface spaced from said cylindrical wall and including sloping side walls extending between and integrally joined to said cylindrical wall and said plateau area, respectively, said ribs being of essentially the same matrix material as said wall plus superimposed continuous filament reinforcing material arranged in layer form and covering substantially the entire extent of each rib, said filament material being angularly disposed relative to each rib and being embedded in the hardened matrix of each rib, said cylindrical wall alone bridging the gap between said spaced ribs, and the matrix of said cylindrical wall and the matrix of said ribs being cured to an integral monolithic mass.
Claim 2
Dependent Claim
170 words
In a composite monolithic structure of the class described, a generally cylindrical primary wall comprising a layer of discrete randomly oriented lengths of line-type reinforcement material and hardened resin bonded together; a hollow rib superimposed upon and circumscribing a portion of the exterior surface of said primary wall and comprising axially spaced side portions projecting from said wall and joined by a peripheral wall spaced from said primary wall, said rib consisting essentially of the same discrete, randomly oriented leNgths of line-type reinforcement material and hardened resin, as comprises the primary wall; and a layer of filament wound roving superimposed only on said hollow rib and extending angularly of the rib in a plurality of layers to circumferentially enclose the rib, the filament wound roving being saturated and bonded with the resin of the hollow rib, and the resin of the primary wall and of said rib being cured to an integral mass including the reinforcement material of said primary wall and of said rib and the filament wound roving.
Claim 3
Dependent Claim
141 words
In a composite monolithic structure for confining fluid contents underground and capable of withstanding the appreciable compression forces engendered by its below-ground location, the improvements of said structure being defined by a primary peripheral wall formed of randomly oriented, line-type reinforcement material and hardened resin bonded together into a sheet of substantially constant wall thickness throughout the length of the peripheral wall; and separate, axially spaced, annular, hollow stiffening ribs formed of reinforcement material and hardened resin and each superimposed upon said primary peripheral wall; said ribs only each being circumscribed by a filament wound roving extending angularly to the rib to an extent such that each such rib is enclosed thereby, the resin of (1) the primary peripheral wall, and (2) the ribs being integrated into an integral monolithic mass, including the filament wound roving, by a common final curing.
Claim 4
Dependent Claim
154 words
In a composite monolithic structure of the class described and having an essentially cylindrical wall capable of confining fluid in an underground installation, said cylindrical wall consisting essentially of hardened matrix material containing discrete lengths of line-type reinforcement material, the matrix being present in a predominate amount, a plurality of circumferentially extending ribs superimposed upon and spaced along the outer surface of said cylindrical wall, said ribs being formed of essentially the same matrix material as said wall and each such rib being circumscribed by superimposed continuous filament reinforcing material arranged in layer form and covering substantially the entire extent of each rib, said filament material being angularly disposed relative to each rib and being embedded in the hardened matrix of each rib, said cylindrical wall along bridging the gap between said spaced ribs, and the matrix of said cylindrical wall and the matrix of said ribs being cured to an integral monolithic mass.
Claim 5
Dependent Claim
164 words
In a composite monolithic structure of the class described, a generally cylindrical primary wall comprising a layer of discrete randomly oriented lengths of line-type reinforcement material and hardened resin bonded together; a rib superimposed upon and circumscribing a portion of the exterior surface of said primary wall and comprising axially spaced side portions projecting from said wall and joined by a peripheral wall spaced from said primary wall, said rib comprising a mixture of hardened resin and reinforcement material enclosing a hollow form, and said rib being circumscribed by a layer of filament wound roving superimposed only on said rib and extending angularly of the rib in a plurality of layers to circumferentially enclose the rib, the filament wound roving being saturated and bonded with the resin of the rib, and the resin of the primary wall and of said rib being cured to an integral mass including the reinforcement material of said primary wall and of said rib and the filament wound roving.
Claim 6
Dependent Claim
145 words
In a composite monolithic structure of the class described, a layer of discrete lengths of line-type reinforcement material and hardened resin bonded together, a hollow shell form having sides joined to and bridged by a wall spaced from said layer, said hollow shell form being of generally trapezoidal shape and wherein the sides slope toward one another and away from said layer, and including a fiber layer as a shaping element, supported by spaced trapezoidal bLocks to establish and retain form, and over the fiber layer shell is positioned a layer of woven roving and on top a layer of filament winding extending axially of the shell, the layers being saturated and bonded with synthetic resin and instantly ready to assume loading, and substantially without tension in the unstressed condition of the structure, and the resin of said composite being cured to an integral mass.
Claim 7
Dependent Claim
18 words
The invention according to claim 7, wherein said fiber layer comprises fiberboard and said trapezoidal block is wood.
Claim 8
Dependent Claim
35 words
The invention according to claim 2, wherein said hardened matrix is a synthetic resin and said discrete lengths of line-type reinforcement material are chopped glass strands, and said continuous filament reinforcement comprises continuous glass strands.
Claim 9
Dependent Claim
91 words
The invention according to claim 2, wherein said tank comprises opposed, aligned, and abutted endless wall elements of frusto-conical configuration, with the large ends abutted at the center of the vessel, and wherein said hardened matrix is a synthetic resin and said discrete lengths of line-type reinforcement material are chopped glass strands and said continuous filament reinforcement comprises continuous glass strands, and said wall elements being connected together at the center by alternate layers of mat and woven roving spanning the abutment line and being embedded in a hardened resin matrix.
Claim 10
Dependent Claim
64 words
The invention according to claim 10, wherein said end caps consist essentially of layer of hardened matrix, in predominant amount, and containing discrete lengths of line-type reinforcement material, a layer of woven reinforcement extending over the end cap and the endless wall along the area where said end cap and endless wall join one another, and the woven reinforcement being embedded in hardened matrix.
Claim 11
Dependent Claim
24 words
The invention according to claim 11, wherein said discrete lengths are chopped glass strands and said woven reinforcement is made of continuous glass strands.
References Cited (Backward Citations)
US2614058A
Cited
US2718583A
Cited
US3335903A
Cited
US3335904A
Cited
US3412891A
Cited
FR1456663A
Cited
US3394841A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |