Patent US4136846A successfully refreshed from Google Patents.
US4136846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite structure
Assignee: Boeing Commercial Airplane Co
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Filing: 1976-12-20
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Granted: 1979-01-30
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Expires: 1996-12-20
Abstract
Abstract A high density honeycomb with a unidirectional reinforcing fiber located on each face makes up a primary load carrying member. A low density honeycomb material in combination with the load carrying member makes up the core of a structural member which is completed by the core being encased in a reinforced plastic.
Inventors
- 👤 Paul C. Brault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:29
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/10; B32B3/12; B64; B64C; B64C27/00; B64C27/32; B64C27/46; B64C27/463; B64C27/473; B32B2305/00; B32B2305/02; B32B2305/024; B32B2305/08; B32B2605/00; B32B2605/18; B64C2027/4733; B64C2027/4736; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10T; Y10T428/00; Y10T428/23; Y10T428/234; Y10T428/236; Y10T428/24; Y10T428/24149; Y10T428/30; Y10T428/31504; Y10T428/31511; Y10T428/31725; Y10T428/31739; Y10T428/31942
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
62 words
A composite structure comprising: a primary load carrying member of a high density honeycomb strip covered on each face with unidirectional fiber tape to extend lengthwise along the strip, a low density honeycomb core along each side of the primary load carrying member, and a reinforced plastic to cover the core and primary load carrying member to form an integrated structural member.
Claim 2
Dependent Claim
62 words
A composite structure comprising: a primary load carrying member of a high density honeycomb strip covered on each face with unidirectional fiber tape to extend lengthwise along the strip, a low density honeycomb core along each side of the primary load carrying member, and a reinforced plastic to cover the core and primary load carrying member to form an integrated structural member.
Claim 3
Dependent Claim
16 words
A composite structure as in claim 1 wherein the fiber in the unidirectional tape is graphite.
Claim 4
Dependent Claim
22 words
A composite structure as in claim 2 wherein the honeycomb in the primary load carrying member and the honeycomb core is plastic.
Claim 5
Dependent Claim
73 words
A composite wing fin comprising: a pair of spaced apart longitudinally extending dense honeycomb core members, low density honeycomb cores to extend between and laterally outward from said dense honeycomb core members, a unidirectional lengthwise graphite tape to extend along each face of the dense honeycomb core members to form a pair of spaced apart primary load-carrying members, and a reinforced plastic to encase the honeycomb cores to form a composite wing fin.
Claim 6
Dependent Claim
73 words
A composite wing fin comprising: a pair of spaced apart longitudinally extending dense honeycomb core members, low density honeycomb cores to extend between and laterally outward from said dense honeycomb core members, a unidirectional lengthwise graphite tape to extend along each face of the dense honeycomb core members to form a pair of spaced apart primary load-carrying members, and a reinforced plastic to encase the honeycomb cores to form a composite wing fin.
Claim 7
Dependent Claim
27 words
A composite wing fin as in claim 4 wherein the honeycomb core materials are of metal and the encasing reinforced plastic is a glass reinforced epoxy resin.
Claim 8
Dependent Claim
25 words
A composite wing fin as in claim 4 wherein the honeycomb core materials are of plastic and the encasement is of glass reinforced epoxy resin.
Claim 9
Dependent Claim
29 words
A composite wing fin as in claim 4 wherein the reinforced plastic honeycomb is of nylon modified phenolic resin and the encasement material is a glass reinforced epoxy resin.
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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) | 1982-01-29 | 1982-07-31 | 1983-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-29 | 1986-07-31 | 1987-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-29 | 1990-07-31 | 1991-01-30 | $7700.00 | Window Closed / Lapsed |