US4933131A
Expired / Lapsed
US
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Method of fabricating composite structures
Assignee: Sundstrand Corp
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Filing: 1987-12-29
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Granted: 1990-06-12
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Expires: 2007-12-29
Abstract
Abstract A method of fabricating a composite structure having at least one skin molecularly bonded to a core. A skin is provided of reinforcing fibrous material and a thermoplastic matrix. The skin is thermoformed to the general exterior shape of the composite strucutre. The skin is placed in a mold, and a core material is injected into the mold against the skin under isostatic conditions. The core material includes a thermoplastic matrix compatible to the thermoplastic matrix of the skin to form a molecular bond therewith.
Inventors
- 👤 David W. Okey
- 👤 Hossein Saatchi
- 👤 John F. Scanlon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:15
CPC Classifications
B; B29; B29D; B29D99/00; B29D99/001; B29D99/0021; B29C; B29C44/00; B29C44/02; B29C44/12; B29C44/14; B29C45/00; B29C45/14; B29C45/14778; B29C70/00; B29C70/04; B29C70/06; B29C70/08; B29C70/086; B32; B32B; B32B37/00; B29K; B29K2071/00; B29K2105/00; B29K2105/04; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
86 words
A method of fabricating a composite structure having at least one skin molecularly bonded to a core, comprising the steps of: providing a skin composed of reinforcing material and a thermoplastic polyetheretherketone matrix; thermoforming the skin to the general shape of the composite structure; and placing the skin in a mold and injecting a core material into the mold against the skin under isostatic conditions, the core material including a thermoplastic matrix compatible to the thermoplastic matrix of the skin to form a molecular bond therewith.
Claim 2
Independent Claim
86 words
A method of fabricating a composite structure having at least one skin molecularly bonded to a core, comprising the steps of: providing a skin composed of reinforcing material and a thermoplastic polyetheretherketone matrix; thermoforming the skin to the general shape of the composite structure; and placing the skin in a mold and injecting a core material into the mold against the skin under isostatic conditions, the core material including a thermoplastic matrix compatible to the thermoplastic matrix of the skin to form a molecular bond therewith.
Claim 3
Independent Claim
86 words
A method of fabricating a composite structure having at least one skin molecularly bonded to a core, comprising the steps of: providing a skin composed of reinforcing material and a thermoplastic matrix; thermoforming the skin to the general shape of the composite structure; and placing the skin in a mold and injecting a core material into the mold against the skin under isostatic conditions, the core material including a thermoplastic polyetheretherketone matrix compatible to the thermoplastic matrix of the skin to form a molecular bond therewith.
Claim 4
Independent Claim
86 words
A method of fabricating a composite structure having at least one skin molecularly bonded to a core, comprising the steps of: providing a skin composed of reinforcing material and a thermoplastic matrix; thermoforming the skin to the general shape of the composite structure; and placing the skin in a mold and injecting a core material into the mold against the skin under isostatic conditions, the core material including a thermoplastic polyetheretherketone matrix compatible to the thermoplastic matrix of the skin to form a molecular bond therewith.
Claim 5
Independent Claim
87 words
A method of fabricating a composite structure having at least one skin molecularly bonded to a core, comprising the steps of: providing a skin composed of reinforcing material and a thermoplastic matrix; thermoforming the skin to the general shape of the composite structure; and placing the skin in a mold and injecting a core material into the mold against the skin under isostatic conditions, the core material including a liquid crystal polymer matrix compatible to the thermoplastic matrix of the skin to form a molecular bond therewith.
Claim 6
Independent Claim
87 words
A method of fabricating a composite structure having at least one skin molecularly bonded to a core, comprising the steps of: providing a skin composed of reinforcing material and a thermoplastic matrix; thermoforming the skin to the general shape of the composite structure; and placing the skin in a mold and injecting a core material into the mold against the skin under isostatic conditions, the core material including a liquid crystal polymer matrix compatible to the thermoplastic matrix of the skin to form a molecular bond therewith.
Claim 7
Independent Claim
86 words
A method of fabricating a composite structure having at least one skin molecularly bonded to a core, comprising the steps of: providing a skin composed of reinforcing material and a thermoplastic matrix; thermoforming the skin to the general shape of the composite structure; and placing the skin in a mold and injecting a core material into the mold against the skin under isostatic conditions, the core material including a thermoplastic polyetherketone matrix compatible to the thermoplastic matrix of the skin to form a molecular bond therewith.
Claim 8
Independent Claim
86 words
A method of fabricating a composite structure having at least one skin molecularly bonded to a core, comprising the steps of: providing a skin composed of reinforcing material and a thermoplastic matrix; thermoforming the skin to the general shape of the composite structure; and placing the skin in a mold and injecting a core material into the mold against the skin under isostatic conditions, the core material including a thermoplastic polyetherketone matrix compatible to the thermoplastic matrix of the skin to form a molecular bond therewith.
Claim 9
Independent Claim
86 words
A method of fabricating a composite structure having at least one skin molecularly bonded to a core, comprising the steps of: providing a skin composed of reinforcing material and a thermoplastic polyetherketone matrix; thermoforming the skin to the general shape of the composite structure; and placing the skin in a mold and injecting a core material into the mold against the skin under isostatic conditions, the core material including a thermoplastic matrix compatible to the thermoplastic matrix of the skin to form a molecular bond therewith.
Claim 10
Independent Claim
86 words
A method of fabricating a composite structure having at least one skin molecularly bonded to a core, comprising the steps of: providing a skin composed of reinforcing material and a thermoplastic polyetherketone matrix; thermoforming the skin to the general shape of the composite structure; and placing the skin in a mold and injecting a core material into the mold against the skin under isostatic conditions, the core material including a thermoplastic matrix compatible to the thermoplastic matrix of the skin to form a molecular bond therewith.
Claim 11
Independent Claim
90 words
A method of fabricating a composite structure having at least one skin molecularly bonded to a core, comprising the steps of: providing a skin composed of reinforcing material and a thermoplastic polyetheretherketone matrix; thermoforming the skin to the general shape of the composite structure; and placing the skin in a mold and injecting a core material into the mold against the skin under conditions of pressure and heat, the core material including a thermoplastic polyetheretherketone matrix compatible to the thermoplastic matrix of the skin to form a molecular bond therewith.
Claim 12
Independent Claim
90 words
A method of fabricating a composite structure having at least one skin molecularly bonded to a core, comprising the steps of: providing a skin composed of reinforcing material and a thermoplastic polyetheretherketone matrix; thermoforming the skin to the general shape of the composite structure; and placing the skin in a mold and injecting a core material into the mold against the skin under conditions of pressure and heat, the core material including a thermoplastic polyetheretherketone matrix compatible to the thermoplastic matrix of the skin to form a molecular bond therewith.
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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) | 1993-06-11 | 1993-12-11 | 1994-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-11 | 1997-12-11 | 1998-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-11 | 2001-12-11 | 2002-06-12 | $7700.00 | Window Closed / Lapsed |