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US4451528A Expired / Lapsed US ⏱️ 0.0 years remaining

Composite fiber reinforced member and method

Assignee: MASCOTECH INDUSTRIAL COMPONENTS Inc
•
Filing: 1982-09-16
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Granted: 1984-05-29
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Expires: 2002-09-16
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Abstract

Abstract A composite fiber reinforced plastic member and its method of manufacture to provide a high-strength light-weight part particularly suitable for use as a structural component. The composite member comprises a body or web comprised of a glass fiber reinforced thermosetting resin matrix having a carbonized fiber reinforced compatible resin stratum integrally bonded by the resin matrix over selected areas thereof corresponding to areas of anticipated high stress. The component is produced by molding under pressure and heat a moldable assembly comprising a first sheet of a flowable heat curable resin containing glass fibers having one or a plurality of second sheets comprised of a compatible flowable heat curable resin containing carbonized fibers disposed over selected areas of the first sheet. During the compression molding operation, the resins in the first and second sheets flow to conform with and fill the mold cavity and the resins cure forming a smooth surfaced composite integral assembly of high strength.

Inventors

  • 👤 Charles J. Krause

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 19:58
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/28; B29C70/40; B29C70/42; B29C70/46; B29K; B29K2307/00; B29K2309/00; B29K2309/08; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/249949; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/292; Y10T428/30

Claims Analysis

Total Claims: 13
Claim 1
Independent Claim 45 words
A composite fiber reinforced article comprising a body comprised of a cured thermosetting resin incorporating glass fibers therein, said body having integrally bonded over at least one localized area thereof, a surface stratum comprised of a cured compatible thermosetting resin having high-strength graphite fibers therein.
Claim 2
Dependent Claim 45 words
A composite fiber reinforced article comprising a body comprised of a cured thermosetting resin incorporating glass fibers therein, said body having integrally bonded over at least one localized area thereof, a surface stratum comprised of a cured compatible thermosetting resin having high-strength graphite fibers therein.
Claim 3
Dependent Claim 22 words
The article as defined in claim 1 in which said glass fibers in said body are chopped fibers disposed in random orientation.
Claim 4
Dependent Claim 25 words
The article as defined in claim 1 in which said glass fibers in said body are disposed in oriented selected directions to provide optimum strength.
Claim 5
Dependent Claim 26 words
The article as defined in claim 1 in which said glass fibers in said body comprise a mixture of chopped glass fibers and continuous glass filaments.
Claim 6
Dependent Claim 31 words
The article as defined in claim 1 in which said glass fibers comprise a mixture of chopped glass fibers disposed in random orientation and continuous glass filaments oriented in selected directions.
Claim 7
Dependent Claim 26 words
The article as defined in claim 1 in which said body contains glass fibers in an amount up to about 80% by weight of said body.
Claim 8
Dependent Claim 17 words
The article as defined in claim 1 in which said graphite fibers are oriented in selected directions.
Claim 9
Dependent Claim 25 words
The article as defined in claim 1 in which said graphite fibers are in the form of continuous filaments disposed in a uni-directional oriented position.
Claim 10
Dependent Claim 27 words
The article as defined in claim 1 in which said graphite fibers are present in an amount up to about 75% by weight of said surface stratum.
Claim 11
Dependent Claim 41 words
The article as defined in claim 1 in which said surface stratum is present over a plurality of localized areas of said body corresponding to those areas of anticipated high stress to which said article is to be subjected during service.
Claim 12
Dependent Claim 26 words
The article as defined in claim 1 in which said thermosetting resin in said body and said surface stratum is of substantially the same chemical composition.
Claim 13
Dependent Claim 24 words
The article as defined in claim 1 in which said thermosetting resin in said body and said surface stratum comprises a cured polyester-type resin.

References Cited (Backward Citations)

US4023801A Cited
US4364990A Cited
US4323623A Cited
US4178406A Cited
US4201823A Cited
US4237177A Cited
US4265968A Cited
US4263367A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1987-05-29 1987-11-28 1988-05-29 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1991-05-29 1991-11-28 1992-05-29 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1995-05-29 1995-11-28 1996-05-29 $7700.00 Window Closed / Lapsed

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