EP0037104A2
Expired / Lapsed
EP
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Clutch with pyrolytic carbon friction material
Assignee: Eaton Corp
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Filing: 1981-03-27
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Granted: —
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Expires: 2001-03-27
Abstract
Abstract Disclosed is a locking differential 10 including an oil lubricated clutch assembly 18 having a plurality of interleaved friction discs 48, 50, 60 and 62 formed of steel and squeezed together to retard relative rotation of differential side gears 32 and 34. Adjacent friction discs have mutually facing friction surfaces. One of each mutually facing friction surface is defined by the metal forming the disc and the other surface is defined by a pyrolytic carbon composite friction material 78. In one form, the friction material includes a meshed cloth substrate formed of carbon fibers, which may be woven into a single layer of cloth, and a coating of carbon deposited on the fibers by chemical vapor deposition to a level forming a friction material having a relatively open mesh which is readily penetrated by an adhesive to improve bonding of the friction material to the discs.
Inventors
- 👤 Peter Stanhope Winckler
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 15:34
CPC Classifications
F; F16; F16H; F16H48/00; F16H48/20; F16H48/22; B; B60; B60T; B60T1/00; B60T1/02; B60T1/06; B60T1/065; C; C04; C04B; C04B35/00; C04B35/71; C04B35/78; C04B35/80; C04B35/83; F16D; F16D65/00; F16D65/02; F16D65/12; F16D65/127; F16D69/00; F16D69/02; F16D69/023; F16D69/04; F16D2069/0425; F16D2069/045; F16D2069/0466; F16D65/125; F16D65/126; F16H2048/202; F16H48/06; F16H48/08; F16H48/295; Y; Y10; Y10S; Y10S475/00; Y10S475/901; Y10S475/902; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
37 words
A friction material comprising: a meshed cloth substrate formed of carbon fibers; and a coating of carbon deposited on said fibers by chemical vapor deposition to a level forming a friction material having a relatively open mesh.
Claim 2
Dependent Claim
37 words
A friction material comprising: a meshed cloth substrate formed of carbon fibers; and a coating of carbon deposited on said fibers by chemical vapor deposition to a level forming a friction material having a relatively open mesh.
Claim 3
Dependent Claim
17 words
The material of Claim 1, wherein said carbon fibers are woven into a single layer of cloth.
Claim 4
Dependent Claim
17 words
The material Claims 1 or 2, wherein the thickness of said material is less than 0.080 inches.
Claim 5
Dependent Claim
66 words
In a clutch or brake device including at least two members mounted for relative rotation, each member having a friction surface rotatable therewith and confronting each other, means to frictionally engage said confronting surfaces to retard said relative rotation, and a cooling liquid in contact with said confronting surfaces, the improvement comprising: a pyrolytic carbon composite friction material defining at least one of said confronting surfaces.
Claim 6
Dependent Claim
66 words
In a clutch or brake device including at least two members mounted for relative rotation, each member having a friction surface rotatable therewith and confronting each other, means to frictionally engage said confronting surfaces to retard said relative rotation, and a cooling liquid in contact with said confronting surfaces, the improvement comprising: a pyrolytic carbon composite friction material defining at least one of said confronting surfaces.
Claim 7
Dependent Claim
43 words
The device of Claim 4, wherein said friction material includes: a meshed cloth substrate formed of carbon fibers; and a coating of carbon deposited on said fibers by chemical vapor deposition to a level forming a friction material having a relatively open mesh.
Claim 8
Dependent Claim
50 words
The device of Claim 4, wherein said friction material includes: a meshed cloth substrate formed of carbon fibers woven into a single layer of cloth; and a coating of carbon deposited on said fibers by chemical vapor deposition to a level forming a friction material having a relatively open mesh.
Claim 9
Independent Claim
20 words
The device of Claims 4 or 5 or 6, wherein the thickness of said material is less than 0.080 inches.
Claim 10
Independent Claim
36 words
The device of Claims 4, 5, or 6, wherein said material is bonded to said at least one member by an adhesive which penetrates said mesh to improve the bond between said material and said member.
Claim 11
Independent Claim
31 words
The device of Claims 4, 5, or 6, wherein said members are formed of a metallic material and wherein the other of said confronting surfaces is defined by said metallic material.
Claim 12
Dependent Claim
38 words
The device of Claim 7, wherein said carbon material is bonded to said at least one member by an adhesive which penetrates said mesh to improve the bond between said carbon material and said at least one member.
Claim 13
Dependent Claim
27 words
The device of Claim 7, wherein said members are formed of a metallic material and the other of said confronting surfaces is defined by said metallic material.
Claim 14
Dependent Claim
148 words
In a differential including a casing mounted for rotation in a liquid lubricant bath, first and second side gears mounted for rotation in the casing for rotation relative to each other and relative to the casing, first and second sets of interleaved metal discs respectively rotatable with the casing and at least one of said gears and having mutually facing friction surfaces lubricated by said liquid, means for frictionally engaging said mutually facing surfaces to retard said relative rotation, one of each mutually facing friction surfaces defined by the metal defining its respective disc, the improvement comprising: a pyrolytic carbon composite friction material defining the other of each mutually facing friction surfaces, said material including: a meshed clutch substrate formed of carbon fibers, and a coating of carbon deposited on said fibers by chemical vapor deposition to a level forming a friction material having a relatively open mesh.
Claim 15
Dependent Claim
148 words
In a differential including a casing mounted for rotation in a liquid lubricant bath, first and second side gears mounted for rotation in the casing for rotation relative to each other and relative to the casing, first and second sets of interleaved metal discs respectively rotatable with the casing and at least one of said gears and having mutually facing friction surfaces lubricated by said liquid, means for frictionally engaging said mutually facing surfaces to retard said relative rotation, one of each mutually facing friction surfaces defined by the metal defining its respective disc, the improvement comprising: a pyrolytic carbon composite friction material defining the other of each mutually facing friction surfaces, said material including: a meshed clutch substrate formed of carbon fibers, and a coating of carbon deposited on said fibers by chemical vapor deposition to a level forming a friction material having a relatively open mesh.
Claim 16
Dependent Claim
17 words
The differential of Claim 12, wherein said carbon fibers are woven into a single layer of cloth.
Claim 17
Dependent Claim
29 words
The differential of Claim 12, wherein said carbon fibers are woven into a single layer of cloth and wherein the thickness of said material is less than 0.080 inches.
Claim 18
Dependent Claim
35 words
The differential of Claims 12, 13, or 14, wherein said material is bonded to its respective discs by an adhesive which penetrates said mesh to improve the bond between said material and the respective discs.
References Cited (Backward Citations)
No citation records indexed.
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