US4391301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hole reinforcement
Assignee: AOS Holding Co
•
Filing: 1981-08-27
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Granted: 1983-07-05
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Expires: 2001-08-27
Abstract
Abstract A filament wound structural vessel includes a cylindrical wall formed of a cured thermosetting resin reinforced by fibrous material. An opening in the wall is reinforced by a series of reinforcement bands formed by filament windings that encircle the wall and run adjacent the opening.
Inventors
- 👤 Fred R. Pflederer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:12
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/56; B29C53/58; B29C53/60; B29C53/602; B29C53/605; B65; B65D; B65D90/00; B65D90/02; B65D90/029; Y; Y10; Y10S; Y10S138/00; Y10S138/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
124 words
A structural article comprising: a cylindrical wall having a longitudinal axis and formed of a cured thermosetting resin reinforced by fibrous material, said wall having an opening therein; and a plurality of pairs of opening reinforcement bands, said bands comprising a series of continuous filaments encircling said wall and bonded to the outer surface of said wall, with said bands in each of said pairs being disposed tangentially to the perimeter of said opening and on substantially opposite sides of said opening, one of said pairs of bands disposed substantially normal to the longitudinal axis of said cylindrical wall and at least one of said pairs of bands overlapping at least one other of said pairs of bands in the vicinity of said opening.
Claim 2
Dependent Claim
124 words
A structural article comprising: a cylindrical wall having a longitudinal axis and formed of a cured thermosetting resin reinforced by fibrous material, said wall having an opening therein; and a plurality of pairs of opening reinforcement bands, said bands comprising a series of continuous filaments encircling said wall and bonded to the outer surface of said wall, with said bands in each of said pairs being disposed tangentially to the perimeter of said opening and on substantially opposite sides of said opening, one of said pairs of bands disposed substantially normal to the longitudinal axis of said cylindrical wall and at least one of said pairs of bands overlapping at least one other of said pairs of bands in the vicinity of said opening.
Claim 3
Dependent Claim
51 words
The structural article defined in claim 1 wherein said cylindrical wall is formed by a plurality of fibrous strands disposed in a helical pattern and wherein some of said filaments of said reinforcement bands are wound around said wall at approximately the same angles as those used in said helical pattern.
References Cited (Backward Citations)
CA624433A
Cited
US1527300A
Cited
US3228549A
Cited
US3106940A
Cited
US3303079A
Cited
US3393821A
Cited
US3315989A
Cited
US3321924A
Cited
US3432188A
Cited
US4202379A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-07-04 | 1987-01-03 | 1987-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-04 | 1991-01-03 | 1991-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-04 | 1995-01-03 | 1995-07-05 | $7700.00 | Window Closed / Lapsed |