US4237175A
Expired / Lapsed
US
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Carbon-filament reinforced gear
Assignee: Individual
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Filing: 1978-06-09
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Granted: 1980-12-02
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Expires: 1998-06-09
Abstract
Abstract A carbon-filament reinforced gear material of laminated structure has layers of carbon filaments. The gear material includes a plurality of circular fabrics each having warps and wefts composed of a plurality of carbon filaments. The circular fabrics are laminated one on another such that the carbon filaments of their warps and wefts are substantially equiangularly spaced from those of another fabric about a common axis. The fabrics thus laminated are bound into a unitary structure by means of a binding agent of a thermosetting resin. A method for preparing the carbon-filament reinforced gear material includes the step of loosening the woven fabrics, each of which has such warps and wefts as are composed of the carbon filaments bundled into strands by means of a binding agent, by brushing the plain weave fabrics while applying thereto a binding agent so that the filaments in each of the strands may be substantially equidistantly separated from one another to make thinner and finer fabrics. The fabrics thus loosened are then laminated one on another with the above-mentioned angular relationships. The fabrics are then subjected to heat and pressure so as to set the binding agent or agents thereby to prepare the desired gear material.
Inventors
- 👤 Tuguo Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:12
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/02; B32B5/12; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/16; B29C70/22; B29C70/228; B29C70/28; B29C70/30; B29C70/34; B29C70/345; B32B38/00; B32B38/18; B32B38/1808; B32B5/024; B32B5/04; B32B5/08; B32B5/22; B32B5/24; B32B5/26; B29K; B29K2307/00; B29L; B29L2009/00; B29L2015/00; B29L2015/003; B32B2262/00; B32B2262/10; B32B2262/106; B32B2305/00; B32B2305/08; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10S74/00; Y10S74/10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T29/00; Y10T29/49; Y10T29/49462; Y10T29/49467; Y10T29/4948; Y10T428/00; Y10T428/24; Y10T428/24777; Y10T428/24785; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/30; Y10T442/00; Y10T442/30; Y10T442/3472; Y10T442/3528
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
239 words
A method for preparing a carbon filament reinforced gear material of laminated structure having layers of carbon filaments, comprising the steps of: loosening the woven fabrics, each of which including warps and wefts being composed of multicarbon filaments bundled into strands by means of a first binding agent; brushing said woven fabrics in the lengthwise and cross-wise or oblique direction while applying thereto a second binding agent so that the filaments in each of the strands may be substantially equidistantly separated from one another to make thinner and finer fabrics, said warps and wefts of said woven fabrics being angularly spaced by approximately 90 degrees; laminating a first said woven fabric with a second said woven fabric wherein said second woven fabric being angularly shifted by approximately 45 degrees relative to said first woven fabric; laminating a third said woven fabric with said first and second said woven fabrics wherein said third woven fabric being angularly shifted by approximately 22.5 degrees relative to said first woven fabric; laminating at least a fourth said woven fabric with said first, second and third said woven fabrics wherein said fourth woven fabric being angularly shifted by approximately 67.5 degrees relative to said first woven fabric; repeating the laminating steps until the desired thickness of the gear material is obtained; and applying heat and pressure to the laminated fabrics so as to set the binding agents thereby to prepare the laminated gear material.
Claim 2
Independent Claim
239 words
A method for preparing a carbon filament reinforced gear material of laminated structure having layers of carbon filaments, comprising the steps of: loosening the woven fabrics, each of which including warps and wefts being composed of multicarbon filaments bundled into strands by means of a first binding agent; brushing said woven fabrics in the lengthwise and cross-wise or oblique direction while applying thereto a second binding agent so that the filaments in each of the strands may be substantially equidistantly separated from one another to make thinner and finer fabrics, said warps and wefts of said woven fabrics being angularly spaced by approximately 90 degrees; laminating a first said woven fabric with a second said woven fabric wherein said second woven fabric being angularly shifted by approximately 45 degrees relative to said first woven fabric; laminating a third said woven fabric with said first and second said woven fabrics wherein said third woven fabric being angularly shifted by approximately 22.5 degrees relative to said first woven fabric; laminating at least a fourth said woven fabric with said first, second and third said woven fabrics wherein said fourth woven fabric being angularly shifted by approximately 67.5 degrees relative to said first woven fabric; repeating the laminating steps until the desired thickness of the gear material is obtained; and applying heat and pressure to the laminated fabrics so as to set the binding agents thereby to prepare the laminated gear material.
Claim 3
Dependent Claim
22 words
A method according to claim 1, further comprising the step of cutting said loosened fabrics into a desired shape including a circle.
Claim 4
Dependent Claim
27 words
A method according to claim 1, wherein the laminating step and the subsequent step of applying heat and pressure are carried out in a pair of molds.
Claim 5
Dependent Claim
34 words
A method for producing a carbon filament reinforced gear of the material which is prepared by the method of claim 1, comprising the step of cutting teeth on the peripheral edge of said material.
Claim 6
Dependent Claim
22 words
A method according to claim 4, wherein following the cutting step the material is subjected to both rough and finish grinding operations.
Claim 7
Dependent Claim
242 words
A carbon filament reinforced gear material of laminated structure having layers of multi- carbon filaments, comprising: a plurality of loosened woven fabrics each having warps and wefts being composed of a plurality of carbon filaments, said woven fabric being brushed in a lengthwise and crosswise or oblique direction while a binding agent is applied thereto to separate the multi-carbon filaments from one another forming thinner and finer fabrics wherein said warps and wefts being angularly spaced by approximately 90 degrees; a first said woven fabric being laminated with a second said woven fabric wherein said second said woven fabric being angularly shifted by approximately 45 degrees relative to said first woven fabric; a third said woven fabric being laminated with said first and second said woven fabrics wherein said third said woven fabric being angularly shifted by approximately 22.5 degrees relative to said first woven fabric; at least a fourth said woven fabric being laminated with said first, second and third said woven fabrics wherein said fourth said woven fabric being angularly shifted by approximately 67.5 degrees relative to said first woven fabric; a thickness of said laminated gear being defined by repeated progressive lamination of said woven fabrics; and said binding agent binding the laminated fabrics into a unitary structure upon the application of heat and pressure; whereby gear teeth formed on the surface of said carbon filament reinforced being an increased strength by the orientation of said warps and wefts.
Claim 8
Dependent Claim
242 words
A carbon filament reinforced gear material of laminated structure having layers of multi- carbon filaments, comprising: a plurality of loosened woven fabrics each having warps and wefts being composed of a plurality of carbon filaments, said woven fabric being brushed in a lengthwise and crosswise or oblique direction while a binding agent is applied thereto to separate the multi-carbon filaments from one another forming thinner and finer fabrics wherein said warps and wefts being angularly spaced by approximately 90 degrees; a first said woven fabric being laminated with a second said woven fabric wherein said second said woven fabric being angularly shifted by approximately 45 degrees relative to said first woven fabric; a third said woven fabric being laminated with said first and second said woven fabrics wherein said third said woven fabric being angularly shifted by approximately 22.5 degrees relative to said first woven fabric; at least a fourth said woven fabric being laminated with said first, second and third said woven fabrics wherein said fourth said woven fabric being angularly shifted by approximately 67.5 degrees relative to said first woven fabric; a thickness of said laminated gear being defined by repeated progressive lamination of said woven fabrics; and said binding agent binding the laminated fabrics into a unitary structure upon the application of heat and pressure; whereby gear teeth formed on the surface of said carbon filament reinforced being an increased strength by the orientation of said warps and wefts.
Claim 9
Dependent Claim
33 words
A carbon-filament reinforced bevel gear material according to claim 6, wherein said woven fabrics are circular and bent at their outer circumferential portions in accordance with a face angle of a bevel gear.
Claim 10
Dependent Claim
18 words
A carbon filament reinforced gear material according to claim 6, wherein said binding agent contains a thermosetting resin.
Claim 11
Dependent Claim
20 words
A method according to claim 1, wherein said first binding agent is the same composition as said second binding agent.
References Cited (Backward Citations)
US3991248A
Cited
US4092453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-02 | 1984-06-02 | 1984-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-02 | 1988-06-02 | 1988-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-02 | 1992-06-02 | 1992-12-02 | $7700.00 | Window Closed / Lapsed |