US4175070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High carbon friction material
Assignee: Bendix Corp
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Filing: 1978-06-02
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Granted: 1979-11-20
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Expires: 1998-06-02
Abstract
Abstract A high carbon friction material for use as a friction lining in a brake or clutch. The friction material consists of a combination of fibers selected from a group including glass, asbestos or other mineral fibers, metal powders, friction modifiers and carbon or graphite particles retained in a matrix created by a thermoset phenolic resin to establish a friction lining. The selected fibers and carbon or graphite particles in the friction material jointly combine to establish a substantially uniform wear rate and coefficient of friction up to 500° C. when the friction lining engages a corresponding mating surface.
Inventors
- 👤 Bruce W. Klein
- 👤 Michael G. Jacko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:59
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/02; F16D69/025; F16D69/026; C; C08; C08K; C08K3/00; C08K3/02; C08K3/04; F16D69/021; F16D69/022; F16D2200/00; F16D2200/006; F16D2200/0069
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
118 words
A friction material consisting of a mixture of: 20-33% by weight of fibers selected from a group consisting of glass fiber, asbestos and other mineral fibers; 4-22% by weight of metal or metal oxide particles; 0-7% by weight of organic modifiers; 7-24% by weight of inorganic modifiers; 18-34% by weight of carbon or graphite particles; and 8-14% by weight of a thermosetting phenolic resin, said thermosetting phenolic resin being cured to form a matrix for holding the selected fibers, metal or metal oxide particles, the organic and inorganic modifiers and carbon or graphite particles in a fixed relationship, said carbon or graphite particles modifying the abrasive effect of said fibers on a mating surface to prevent degradation thereof.
Claim 2
Dependent Claim
118 words
A friction material consisting of a mixture of: 20-33% by weight of fibers selected from a group consisting of glass fiber, asbestos and other mineral fibers; 4-22% by weight of metal or metal oxide particles; 0-7% by weight of organic modifiers; 7-24% by weight of inorganic modifiers; 18-34% by weight of carbon or graphite particles; and 8-14% by weight of a thermosetting phenolic resin, said thermosetting phenolic resin being cured to form a matrix for holding the selected fibers, metal or metal oxide particles, the organic and inorganic modifiers and carbon or graphite particles in a fixed relationship, said carbon or graphite particles modifying the abrasive effect of said fibers on a mating surface to prevent degradation thereof.
Claim 3
Dependent Claim
30 words
The friction material, as recited in claim 1, wherein said metal or metal oxide particles are selected from a group consisting of iron, iron oxide, copper, copper oxide and brass.
Claim 4
Dependent Claim
28 words
The friction material, as recited in claim 2, wherein said 4-22% by weight of metal powders or metal oxide includes at least 5% by weight of iron powder.
Claim 5
Dependent Claim
28 words
The friction material, as recited in claim 2, wherein said 4-22% by weight of metal powders or metal oxide includes at least 10% by weight of copper powder.
Claim 6
Dependent Claim
20 words
The friction material, as recited in claim 4, wherein said fibers include at least 14% by weight of glass fiber.
Claim 7
Dependent Claim
26 words
The friction matrial, as recited in claim 4, wherein said fibers include a combination of equal amount by volume of glass fiber and other mineral fibers.
Claim 8
Dependent Claim
29 words
The friction material, as recited in claim 4, wherein said fibers include a combination of 14% by weight of glass fiber and 14% by weight of other mineral fibers.
Claim 9
Dependent Claim
26 words
The friction material, as recited in claim 5, wherein the amount of said carbon or graphite particles present in the mixture is about 23% by weight.
Claim 10
Dependent Claim
27 words
The friction material, as recited in claim 6, wherein the amount of said carbon or graphite particles present in the mixture is at least 18% by weight.
Claim 11
Dependent Claim
23 words
The friction material, as recited in claim 7, wherein the amount of said resin present in the mixture is about 8% by weight.
Claim 12
Dependent Claim
19 words
The friction material, as recited in claim 1, wherein said fibers include at least 20% by weight of asbestos.
Claim 13
Dependent Claim
17 words
The friction material, as recited in claim 1, wherein said fibers include 20-33% by weight of absestos.
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) | 1982-11-19 | 1983-05-21 | 1983-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-19 | 1987-05-21 | 1987-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-19 | 1991-05-21 | 1991-11-20 | $7700.00 | Window Closed / Lapsed |