US4563386A
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Friction element comprised of heat resistant heterogeneous thermosetting friction material
Assignee: Cercasbest Corp
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Filing: 1984-09-19
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Granted: 1986-01-07
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Expires: 2004-09-19
Abstract
Abstract Novel heat resistant heterogeneous thermosetting compositions of matter are described wherein one functionally useful thermosetting reinforced plastic friction material comprises a homogeneous continuous phase and another dissimilar functionally useful thermosetting reinforced plastic friction material comprises a second homogeneous phase dispersed heterogeneously as granules in random manner throughout the first phase, whereby a functional advantage is obtained over a simple homogeneous mixture of the two materials, throughout the life of the friction element.
Inventors
- 👤 Hugo D. Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:02
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/02; F16D69/025; F16D69/026; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/268; Y10T442/00; Y10T442/20; Y10T442/2344
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
103 words
A heterogeneous friction element comprising a continuous phase and at least one discrete granular phase embedded randomly throughout said continuous phase, wherein each phase consists of dissimilar thermosetting reinforced plastic friction material, each friction material comprising 10-80% reinforcing filler, 20-40% thermosetting binder and 0-70% modifiers, and wherein the discrete phase comprises particles retained on an 8 mesh screen and further comprises 55-85% of the total by weight, and wherein said friction element exhibits a higher cold coefficient of friction than the continuous phase, a higher hot coefficient of friction than the discrete phase, and a higher resistance to wear then the continuous phase.
Claim 2
Dependent Claim
103 words
A heterogeneous friction element comprising a continuous phase and at least one discrete granular phase embedded randomly throughout said continuous phase, wherein each phase consists of dissimilar thermosetting reinforced plastic friction material, each friction material comprising 10-80% reinforcing filler, 20-40% thermosetting binder and 0-70% modifiers, and wherein the discrete phase comprises particles retained on an 8 mesh screen and further comprises 55-85% of the total by weight, and wherein said friction element exhibits a higher cold coefficient of friction than the continuous phase, a higher hot coefficient of friction than the discrete phase, and a higher resistance to wear then the continuous phase.
Claim 3
Dependent Claim
18 words
A heterogeneous friction element of claim 1 wherein the discrete phase comprises 65-85% of the total by weight.
Claim 4
Dependent Claim
49 words
A heterogeneous friction element of claim 1 wherein the continuous phase comprises asbestos containing friction material and the discrete phase comprises semi-metallic non-asbestos containing friction material, the discrete phase comprising at least 65% of the total weight of the friction element, and wherein the friction element is thermally insulating.
Claim 5
Dependent Claim
49 words
A heterogeneous friction element of claim 1 wherein the continuous phase comprises non-asbestos containing friction material and the discrete phase comprises semi-metallic non-asbestos containing friction material, the discrete phase comprising at least 65% of the total weight of the friction element, and wherein the friction element is thermally insulating.
Claim 6
Dependent Claim
23 words
A heterogeneous friction element of claim 1 wherein the friction materials are a phenolic resin friction material and a polybutadiene rubber friction material.
Claim 7
Dependent Claim
24 words
A heterogeneous friction element of claim 1 wherein the discrete granular phase contains granules of at least two dissimilar thermosetting reinforced plastic friction materials.
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) | 1989-01-06 | 1989-07-08 | 1990-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-06 | 1993-07-08 | 1994-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-06 | 1997-07-08 | 1998-01-07 | $7700.00 | Window Closed / Lapsed |