Patent US4602480A successfully refreshed from Google Patents.
US4602480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Threaded polar openings for composite pressure vessels
Assignee: Hercules LLC
•
Filing: 1982-09-29
•
Granted: 1986-07-29
•
Expires: 2002-09-29
Abstract
Abstract A composite pressure vessel having a large diameter, threaded polar opening with integrally depending threads is disclosed. The threaded polar opening is reinforced by a winding pattern that enables it to be closed against the axial forces resulting from significant internal pressures. This closure seals the interior of the pressure vessel in the tactical rocket motor case assembly disclosed.
Inventors
- 👤 Paul W. Hill
- 👤 Thomas C. White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:50
CPC Classifications
B; B32; B32B; B32B1/00; B29; B29C; B29C53/00; B29C53/56; B29C53/58; B29C53/60; B29C53/602; B32B5/00; B32B5/02; B32B5/12; F; F02; F02K; F02K9/00; F02K9/08; F02K9/32; F02K9/34; F02K9/343; F16; F16J; F16J12/00; F17; F17C; F17C1/00; F17C1/16; B29L; B29L2031/00; B29L2031/712; B29L2031/7154; B29L2031/7156; B32B2262/00; B32B2262/02; B32B2262/0261; B32B2262/10; B32B2262/101; B32B2262/106; B32B2307/00; B32B2307/50; B32B2307/514; B32B2307/516; F05; F05D; F05D2250/00; F05D2250/20; F05D2250/28; F05D2250/281; F17C2203/00; F17C2203/06; F17C2203/0634; F17C2203/0658; F17C2203/0663; F17C2209/00; F17C2209/21; F17C2209/2154; F17C2209/2163; F17C2209/23; F17C2209/232; Y; Y10; Y10S; Y10S411/00; Y10S411/904; Y10S411/908
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
288 words
A filament wound pressure vessel adapted to withstand significant internal pressures and having a threaded opening for closure by a threaded closure member having a diameter substantially equal to that of said pressure vessel, said pressure vessel comprising: a first tubular section; a second tubular section that integrates with said first tubular section around a common center axis and comprises threads having a ridge and a valley that adjacently spiral together around the inside of said second tubular section, said ridge depending integrally from said second tubular section into said pressure vessel around said threaded opening and containing overlapping layers of uniaxial filament and cloth filament that alternate with each other; each of said layers of uniaxial filament extending continuously between a location in said first tubular section that is remote from said second tubular section and the end of said second tubular section that is remote from said first tubular section, said uniaxial filament: (i) disposed in said second tubular section at an angle, relative to lines parallel to said center axis, that has an absolute value of between about 5° and 35°, (ii) contoured as said ridge and valley of said second tubular section in layers that are radially spaced from each other; each of said layers of cloth filament extending from locations in said first tubular section proximate said second tubular section to the end of said second tubular section that is remote from said first tubular section, said cloth filaments contoured to said ridge and valley in said second tubular section in layers that are radially spaced from each other; tows of filaments each of said tows tracking said ridge between a layer of said cloth filament and a layer of said unaxial filament.
Claim 2
Dependent Claim
288 words
A filament wound pressure vessel adapted to withstand significant internal pressures and having a threaded opening for closure by a threaded closure member having a diameter substantially equal to that of said pressure vessel, said pressure vessel comprising: a first tubular section; a second tubular section that integrates with said first tubular section around a common center axis and comprises threads having a ridge and a valley that adjacently spiral together around the inside of said second tubular section, said ridge depending integrally from said second tubular section into said pressure vessel around said threaded opening and containing overlapping layers of uniaxial filament and cloth filament that alternate with each other; each of said layers of uniaxial filament extending continuously between a location in said first tubular section that is remote from said second tubular section and the end of said second tubular section that is remote from said first tubular section, said uniaxial filament: (i) disposed in said second tubular section at an angle, relative to lines parallel to said center axis, that has an absolute value of between about 5° and 35°, (ii) contoured as said ridge and valley of said second tubular section in layers that are radially spaced from each other; each of said layers of cloth filament extending from locations in said first tubular section proximate said second tubular section to the end of said second tubular section that is remote from said first tubular section, said cloth filaments contoured to said ridge and valley in said second tubular section in layers that are radially spaced from each other; tows of filaments each of said tows tracking said ridge between a layer of said cloth filament and a layer of said unaxial filament.
Claim 3
Dependent Claim
14 words
A pressure vessel in accordance with claim 1, wherein said threads comprise buttress threads.
Claim 4
Dependent Claim
44 words
A filament wound pressure vessel in accordance with claim 2, which certain of said layers of cloth each have greater strength in a direction parallel to said center axis, these certain layers being between the inner and outer surfaces of said second tubular section.
Claim 5
Dependent Claim
27 words
a filament wound pressure vessel in accordance with claims 1 or 3 or 2 wherein fibers of said uniaxial filament, cloth filament and tow comprise glass fiber.
Claim 6
Dependent Claim
38 words
A pressure vessel in accordance with claim 1, wherein said first and second tubular sections comprise hoop and helical layers that extend around said pressure vessel over said overlapping layers of uniaxial filament and cloth filament and tows.
Claim 7
Dependent Claim
292 words
A filament wound rocket motor case to withstand significant internal pressures and having a threaded forward opening for closure by a threaded closure member having a diameter substantially equal to that of said pressure vessel, said case, comprising: an aft tubular section; a forward tubular section that integrates with said aft tubular section around a common center axis and comprises threads having a ridge and a valley that adjacently spiral togehter around the inside of said forward tubular section, said ridge depending integrally from said forward tubular section into said case around said threaded forward opening and containing overlapping layers of uniaxial filament and cloth filament that alternate with each other; each of said overlapping layers of uniaxial filament extending continuously between a location in said aft tubular section that is remote from said forward tubular section and the end of said forward tubular section that is remote from said aft tubular section, said uniaxial filament; (i) disposed in said forward tubular section at an angle, relative to lines parallel to said center axis, that has an absolute value of between about 5° and 35°, (ii) contoured as said ridge and valley of said forward tubular section in layers that are radially spaced from each other; each of said overlapping layers of cloth filament extending from locations in said aft tubular section adjacent said forward tubular section to a location in said forward tubular section that is remote from said aft tubular section, said cloth filament contoured to said ridge and valley in said forward tubular section in layers that are radially spaced from each other; spaced tows of uniaxial filament, each of said tows tracking said ridge between a layer of said cloth filament and a layer of said unaxial filament.
Claim 8
Dependent Claim
292 words
A filament wound rocket motor case to withstand significant internal pressures and having a threaded forward opening for closure by a threaded closure member having a diameter substantially equal to that of said pressure vessel, said case, comprising: an aft tubular section; a forward tubular section that integrates with said aft tubular section around a common center axis and comprises threads having a ridge and a valley that adjacently spiral togehter around the inside of said forward tubular section, said ridge depending integrally from said forward tubular section into said case around said threaded forward opening and containing overlapping layers of uniaxial filament and cloth filament that alternate with each other; each of said overlapping layers of uniaxial filament extending continuously between a location in said aft tubular section that is remote from said forward tubular section and the end of said forward tubular section that is remote from said aft tubular section, said uniaxial filament; (i) disposed in said forward tubular section at an angle, relative to lines parallel to said center axis, that has an absolute value of between about 5° and 35°, (ii) contoured as said ridge and valley of said forward tubular section in layers that are radially spaced from each other; each of said overlapping layers of cloth filament extending from locations in said aft tubular section adjacent said forward tubular section to a location in said forward tubular section that is remote from said aft tubular section, said cloth filament contoured to said ridge and valley in said forward tubular section in layers that are radially spaced from each other; spaced tows of uniaxial filament, each of said tows tracking said ridge between a layer of said cloth filament and a layer of said unaxial filament.
Claim 9
Dependent Claim
15 words
A rocket motor case in accordance with claim 6, wherein said threads comprise buttress thread.
Claim 10
Dependent Claim
22 words
a rocket motor case in accordance with claim 6 or 7 wherein said uniaxial filament and said cloth filament comprise glass fiber.
Claim 11
Dependent Claim
28 words
A rocket motor case in accordance with claim 8, wherein each of said layers of cloth filament extends axially to a different location in said rocket motor case.
Claim 12
Dependent Claim
32 words
A rocket motor case in accordance with claim 9, wherein a portion of said layers of cloth filament have filament that reinforces greater in the axial direction of said rocket motor case.
Claim 13
Dependent Claim
40 words
A rocket motor case in accordance with claim 6, wherein said first and second tubular sections comprise hoop and helical layers that extend around said pressure vessel and over said overlapping layers of uniaxial filament and cloth filament and tows.
Claim 14
Dependent Claim
20 words
A rocket motor case in accordance with claim 6, wherein said forward and aft tubular sections comprise aromatic polyamide fiber.
Claim 15
Dependent Claim
19 words
A rocket motor case in accordance with claim 6, wherein said forward and aft tubular sections comprise glass fiber.
Claim 16
Dependent Claim
18 words
A rocket motor case in accordance with claim 6, wherein said forward and aft sections comprise carbon fiber.
References Cited (Backward Citations)
US3124001A
Cited
DE910894C
Cited
GB757890A
Cited
US2964209A
Cited
FR1414309A
Cited
FR1456663A
Cited
US3362159A
Cited
GB1161846A
Cited
DE2044170A1
Cited
GB1453680A
Cited
US3969812A
Cited
SU583350A1
Cited
FR2305656A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-28 | 1990-01-27 | 1990-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-28 | 1994-01-27 | 1994-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-28 | 1998-01-27 | 1998-07-29 | $7700.00 | Window Closed / Lapsed |