US3859160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced carbon bodies
Assignee: Stemcor Corp
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Filing: 1971-09-02
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Granted: 1975-01-07
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Expires: 1991-09-02
Abstract
Abstract The strength of circumferentially wound carbon-fiber reinforced carbon bodies is vastly improved if the reinforcing fibers are wound loosely, to a width greater than the axial thickness of the desired carbon body, and then axially compressed to cause radial overlapping of the carbon fibers. This technique is particularly useful for carbon bodies having an irregular perimeter, such as brake discs containing keyways or other indentations for bearing circumferential stress, since the reinforcing fibers adjacent to the stress-bearing perimeter can be made to conform substantially to the shape of the perimeter and the indentations therein.
Inventors
- 👤 Glenn R Marin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:25
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/71; C04B35/78; C04B35/80; C04B35/83; C01; C01B; C01B32/00; Y; Y10; Y10S; Y10S273/00; Y10S273/23; Y10T; Y10T428/00; Y10T428/21; Y10T428/218; Y10T428/30
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
95 words
A REINFORCED CARBON BODY COMPRISING (1) AN UNDERLYING NETWORK OF REINFORCED CARBON FIBERS; AND (2) A MATRIX OF CARBONIZED BINDER BINDING TOGETHER THE UNDERLYING NETWORK OF REINFORCING FIBERS, CHARACTERIZED IN THAT THE REINFORCING FIBERS COMPRISE FIBERS WHICH ARE SUCCESSIVELY CIRCUMFERENTIALLY WOUND, AXIALLY COMPRESSED, AND RADIALLY OVERLAPPED THROUGHOUT THE CIRCUMFERENCE OF THE BODY IN EACH CROSS-SECTIONAL PLANE CONTAINING THE AXIS OF THE BODY; SAID BODY HAVING AT LEAST ONE PERIMETER WHICH IS ADAPTED TO BEAR CIRCUMFERENTIAL STRESS, THE CIRCUMFERENTIALLY WOUND REINFORCING FIBERS ADJACENT TO SAID STRESS-BEARING PERIMETER CONFORMING SUBSTANTIALLY TO THE SHAPE OF SAID STRESS-BEARING PERIMETER.
Claim 2
Dependent Claim
95 words
A REINFORCED CARBON BODY COMPRISING (1) AN UNDERLYING NETWORK OF REINFORCED CARBON FIBERS; AND (2) A MATRIX OF CARBONIZED BINDER BINDING TOGETHER THE UNDERLYING NETWORK OF REINFORCING FIBERS, CHARACTERIZED IN THAT THE REINFORCING FIBERS COMPRISE FIBERS WHICH ARE SUCCESSIVELY CIRCUMFERENTIALLY WOUND, AXIALLY COMPRESSED, AND RADIALLY OVERLAPPED THROUGHOUT THE CIRCUMFERENCE OF THE BODY IN EACH CROSS-SECTIONAL PLANE CONTAINING THE AXIS OF THE BODY; SAID BODY HAVING AT LEAST ONE PERIMETER WHICH IS ADAPTED TO BEAR CIRCUMFERENTIAL STRESS, THE CIRCUMFERENTIALLY WOUND REINFORCING FIBERS ADJACENT TO SAID STRESS-BEARING PERIMETER CONFORMING SUBSTANTIALLY TO THE SHAPE OF SAID STRESS-BEARING PERIMETER.
Claim 3
Dependent Claim
43 words
The reinforced carbon body of claim 1, having an outer perimeter provided with indentations adapted to bear circumferential stress, and comprising reinforcing fibers adjacent to said outer perimeter which fibers conform substantially to the shape of said outer perimeter and the indentations therein.
Claim 4
Dependent Claim
43 words
The reinforced carbon body of claim 1, having an inner perimeter provided with indentations adapted to bear circumferential stress, and comprising reinforcing fibers adjacent to said inner perimeter which fibers conform substantially to the shape of said inner perimeter and the indentations therein.
Claim 5
Dependent Claim
43 words
The reinforced carbon body of claim 1, having both inner and outer perimeters provided with indentations adapted to bear circumferential stress, and comprising reinforcing fibers adjacent to each perimeter which conform substantially to the shapes of the respective perimeters and the indentations therein.
Claim 6
Dependent Claim
26 words
The reinforced carbon body of claim 1, comprising carbon fibers coated with from about 10 percent to about 30 percent by weight of a refractory material.
Claim 7
Dependent Claim
14 words
The reinforced carbon body of claim 5 wherein said refractory material is silicon carbide.
Claim 8
Dependent Claim
67 words
The reinforced carbon body of claim 1, comprising in at least a portion of the carbon body, an additive selected from the group consisting of boron, niobium, silicon, tantalum, titanium, tungsten and zirconium; borides of niobium, silicon, tantalum, titanium, tungsten and zirconium; carbides of boron, niobium, silicon, tantalum, titanium, tungsten and zirconium; and nitrides of aluminum, boron, niobium, silicon, tantalum, titanium, tungsten and zirconium; and mixtures thereof.
Claim 9
Dependent Claim
39 words
The reinforced carbon body of claim 7 wherein said additive is particulate and is present in an amount equal to from about 0.25 to about 5 percent by volume of the portion of the carbon body containing the additive.
Claim 10
Dependent Claim
90 words
The reinforced carbon body of claim 1, wherein said reinforcing carbon fibers comprise woven carbon cloth, loosely spirally wound such that the width of the cloth runs in the direction of the axial thickness of the carbon body; but said width, prior to axial compression, is substantially greater than the axial thickness of the carbon body; said spirally wound carbon cloth being axially compressed to approximate the axial thickness of the carbon body, whereby to effect radial overlapping of the circumferentially wound fibers of the spirally wound reinforcing carbon cloth.
Claim 11
Dependent Claim
37 words
The reinforced carbon body of claim 9, wherein the ratio of the width of the spirally wound carbon cloth, prior to axial compression, to the thickness of the carbon body ranges from about 1.25:1 to about 3:1.
Claim 12
Dependent Claim
33 words
The reinforced carbon body of claim 9, wherein the ratio of the width of the spirally wound carbon cloth prior to axial compression to the thickness of the carbon body is about 2:1.
Claim 13
Dependent Claim
37 words
The reinforced carbon body of claim 1, having a circumferentially nonuniform radial depth, and comprising means for balancing the fiber density of the underlying network of reinforcing carbon fibers to compensate for said circumferentially nonuniform radial depth.
Claim 14
Dependent Claim
51 words
The reinforced carbon body of claim 12, wherein said means for balancing the fiber density of the underlying network of reinforcing carbon fibers to compensate for said cIrcumferentially nonuniform radial depth comprises supplemental carbon inserted between circumferential windings of the circumferentially wound reinforcing carbon fibers in locations of greater radial depth.
Claim 15
Dependent Claim
49 words
The reinforced carbon body of claim 12, wherein said means for balancing the fiber density of the underlying network of reinforcing carbon fibers to compensate for said circumferentially nonuniform radial depth comprises supplemental carbon positioned adjacent to the circumferentially wound reinforcing carbon fibers in locations of greater radial depth.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |