US5217770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Braided shaped filamentary structures and methods of making
Assignee: DAVID M RONYAK
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Filing: 1991-08-15
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Granted: 1993-06-08
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Expires: 2011-08-15
Abstract
Abstract Fibrous substrates for the production of carbon and/or ceramic (including mixtures of these) fiber reinforced carbon and/or ceramic (including mixtures of these) composites and to methods of manufacture of same. A shaped filamentary structure comprising at least a first braided filamentary tape layer of a width generally corresponding to that of the filamentary structure to be formed, the first braided filamentary tape layer superposed upon and joined to least one other filamentary layer by needlepunching to produce cross-linking of the layers by filaments displaced out of the layers and extending in a direction generally perpendicular to the faces of the layers, and methods of making same. The structure may include a plurality of hellically wound braided tapes arranged to form a flat, hollow annulus having a plurality of interleaved braided layers. The structure may be used in the production of friction discs.
Inventors
- 👤 Edward L. Morris, Jr.
- 👤 Ronnie S. Liew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:05
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/02; F16D69/023; B; B32; B32B; B32B18/00; C; C04; C04B; C04B35/00; C04B35/71; C04B35/78; C04B35/80; C04B35/83; D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4209; D04H1/4242; D04H1/44; D04H1/46; D04H1/498; D04H18/00; D04H18/02; D04H3/00; D04H3/08; D04H3/10; D04H3/105; C04B2235/00; C04B2235/02; C04B2235/50; C04B2235/52; C04B2235/5208; C04B2235/5252; C04B2235/5268; C04B2235/60; C04B2235/604; C04B2237/00; C04B2237/30; C04B2237/32; C04B2237/38; C04B2237/385; C04B2237/50; C04B2237/70; C04B2237/704; C04B2237/76; C04B2237/765; F16D65/00; F16D65/02; F16D65/12; F16D65/125; F16D65/126; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10T; Y10T29/00; Y10T29/49; Y10T29/49801; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1369; Y10T428/24; Y10T428/24777; Y10T428/24785; Y10T428/30
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
81 words
A method of producing a near net shape filamentary structure having a width comprising the steps of forming a braided filamentary tape of a width generally corresponding to the width of the filamentary structure to be formed; superposing at least one filamentary layer on a layer of such braided filamentary tape; needlepunching the superposed layers to produce cross-linking of the layers by filaments displaced out of the layers and extending in a direction generally perpendicular to the faces of the layers.
Claim 2
Independent Claim
81 words
A method of producing a near net shape filamentary structure having a width comprising the steps of forming a braided filamentary tape of a width generally corresponding to the width of the filamentary structure to be formed; superposing at least one filamentary layer on a layer of such braided filamentary tape; needlepunching the superposed layers to produce cross-linking of the layers by filaments displaced out of the layers and extending in a direction generally perpendicular to the faces of the layers.
Claim 3
Dependent Claim
54 words
The method of claim 1 further comprising the steps of superposing at least one layer of braided filamentary tape on another braided filamentary layer; needlepunching the superposed layers to produce cross-linking of the layers by filaments displaced out of the layers and extending in a direction generally perpendicular to the faces of the layers.
Claim 4
Dependent Claim
26 words
The method of claim 1, further comprising forming the braided tape as a tubular braid and introducing unidirectionals into the braid as it is being formed.
Claim 5
Independent Claim
92 words
A method of producing a near net shape hollow flat annular filamentary structure comprising the steps of forming a braided filamentary tape of a width generally corresponding to the radial distance between the inside diameter periphery and the outside diameter periphery of the annular structure to be formed; superposing at least one filamentary layer on a layer of said braided filamentary tape; needlepunching the superposed layers to produce cross-linking of the layers by filaments displaced out of the layers and extending in a direction generally perpendicular to the faces of the layers.
Claim 6
Independent Claim
92 words
A method of producing a near net shape hollow flat annular filamentary structure comprising the steps of forming a braided filamentary tape of a width generally corresponding to the radial distance between the inside diameter periphery and the outside diameter periphery of the annular structure to be formed; superposing at least one filamentary layer on a layer of said braided filamentary tape; needlepunching the superposed layers to produce cross-linking of the layers by filaments displaced out of the layers and extending in a direction generally perpendicular to the faces of the layers.
Claim 7
Dependent Claim
21 words
The method of claim 4, further comprising helically winding the braided tape to form an annulus of superposed braided filamentary layers.
Claim 8
Dependent Claim
27 words
The method of claim 5, further comprising forming the braided tape as a tubular braid, further comprising introducing unidirectionals into the braid as it is being formed.
Claim 9
Dependent Claim
22 words
The method of claim 6, further comprising differentially controlling the tension of the undirectionals as they are formed into the helical braid.
Claim 10
Dependent Claim
20 words
The method of claim 7, further comprising reducing distortion of the braided tape by differential tension control of the unidirectionals.
Claim 11
Dependent Claim
26 words
The method of claim 6, further comprising varying the size of the unidirectionals in a progressively increasing manner toward the outside diameter periphery of the annulus.
Claim 12
Dependent Claim
24 words
The method of claim 6, further comprising varying the spacing of the unidirectionals in a predetermined manner as they are introduced into the braid.
Claim 13
Dependent Claim
28 words
The method of claim 5, further comprising maintaining the fiber volume generally uniform between adjacent the inside diameter periphery and adjacent the outside diameter periphery of the annulus.
Claim 14
Dependent Claim
66 words
The method of claim 3, wherein the structure to be formed has a flat arcuate shape having a width corresponding to the radial distance between the inside periphery and the outside periphery of the arcuate shape, further comprising forming the braided tape of a width generally corresponding to the radial distance between the inside diameter periphery and the outside diameter periphery of the flat arcuate shape.
Claim 15
Dependent Claim
18 words
The method of claim 4, further comprising forming the braided tape by collapsing a helical hollow tubular braid.
Claim 16
Dependent Claim
28 words
The method of claim 5, wherein a plurality of braided tapes are concurrently helically wound to form an annulus of superposed interleaved braided filamentary layers prior to needlepunching.
Claim 17
Dependent Claim
41 words
The method of claim 1 wherein the braided tape is formed from yarns from the group consisting of PAN fibers including OPF, carbon fibers, graphite fibers, ceramic fibers, precursors of carbon fibers and precursor of ceramic fibers, and mixtures of these.
Claim 18
Dependent Claim
41 words
The method of claim 9 wherein the braided tape is formed from yarns from the group consisting of PAN fibers including OPF, carbon fibers, graphite fibers, ceramic fibers, precursors of carbon fibers and precursor of ceramic fibers, and mixtures of these.
Claim 19
Dependent Claim
33 words
The method of claim 1, further including binding together the cross-linked layers by a matrix selected from the group consisting of carbon, ceramic, precursor of carbon, precursor of ceramic, and mixtures of these.
Claim 20
Dependent Claim
71 words
A shaped filamentary structure having a width, the structure comprising at least a first braided filamentary tape layer of a width generally corresponding to the width of the filamentary structure to be formed superposed upon and joined to least one other filamentary layer by needlepunching to produce cross-linking of the layers by filaments displaced out of the layers and extending in a direction generally perpendicular to the faces of the layers.
Claim 21
Dependent Claim
71 words
A shaped filamentary structure having a width, the structure comprising at least a first braided filamentary tape layer of a width generally corresponding to the width of the filamentary structure to be formed superposed upon and joined to least one other filamentary layer by needlepunching to produce cross-linking of the layers by filaments displaced out of the layers and extending in a direction generally perpendicular to the faces of the layers.
Claim 22
Dependent Claim
14 words
The structure of claim 18, wherein said filamentary layer is a braided filamentary layer.
Claim 23
Dependent Claim
66 words
The structure of claim 18, wherein the braided tape is formed from yarns from the group consisting of PAN fibers including OPF, carbon fibers, graphite fibers, ceramic fibers, precursors of carbon fibers and precursor of ceramic fibers, and mixtures of these, further including a matrix selected from the group consisting of carbon, ceramic, precursor of carbon, precursor of ceramic, and mixtures of these binding the filaments.
Claim 24
Dependent Claim
67 words
The structure of claim 18, having a generally flat, hollow annular shape whose width is defined as the radial distance between the inside diameter periphery and the outside diameter periphery of the annular shape, in which the braided layer extends circumferentially, the width of the braided layer generally corresponding to the radial distance between the inside diameter periphery and the outside diameter periphery of the annular structure.
Claim 25
Dependent Claim
27 words
The structure of claim 18, further including a plurality of helically wound braided tapes arranged to form a flat, hollow annulus having plurality of interleaved braided layers.
Claim 26
Dependent Claim
28 words
The structure of claim 21, further including a plurality of helically wound braided tape layers arranged to form a flat, hollow annulus having plurality of interleaved braided layers.
Claim 27
Dependent Claim
70 words
The structure of claim 23, wherein the braided tapes are formed from yarns from the group consisting of PAN fibers including OPF, carbon fibers, graphite fibers, ceramic fibers, precursors of carbon fibers and precursor of ceramic fibers, and mixtures of these, further including a matrix selected from the group consisting of carbon, ceramic, precursor of carbon, precursor of ceramic, and mixtures of these binding the filaments of the braided tapes.
Claim 28
Dependent Claim
47 words
The structure of claim 18, having a flat, arcuate shape whose width is defined as the radial distance between the inner periphery and the outer periphery of the arcuate structure, the structure having substantially uniform fiber volume from adjacent the inner periphery to adjacent the outer periphery.
Claim 29
Dependent Claim
17 words
The structure of claim 18, wherein the braided tape layer is a flattened tubular braid including unidirectionals.
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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) | 1996-06-07 | 1996-12-07 | 1997-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-07 | 2000-12-07 | 2001-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-07 | 2004-12-07 | 2005-06-08 | $7700.00 | Window Closed / Lapsed |