US3898361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluoroelastomer-based composite material
Assignee: Caterpillar Inc
•
Filing: 1973-06-04
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Granted: 1975-08-05
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Expires: 1993-06-04
Abstract
Abstract High modulus asperities are incorporated into a fluoroelastomer matrix to provide a material which, when cured, exhibits high, stable coefficients of friction over a wide temperature range.
Inventors
- 👤 Roger O Bjerk
- 👤 William D Brandon
- 👤 Frederick S Engelking
- 👤 John P Jero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:54
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/02; F16D69/025; C; C08; C08K; C08K3/00; C08K3/01; C08K3/013; C08K3/02; C08K3/04; C08K3/18; C08K3/20; C08K3/22; C08K7/00; C08K7/02; C08K7/04; C08K7/10; C08K7/14; C08K7/16; C08K7/18; C08K7/20; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/252; Y10T428/26; Y10T428/31504; Y10T428/3154
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
104 words
AS A ARTICLE OF MANUFACTURE A FRICTION MATERIAL FORMED OF A MATRIX COMPRISING FROM ABOUT 30 TO ABOUT 50 PERCENT BY WEIGHT OF A COPOLYMER OF HEXAFLUOROPROPYLENE AND VINYLIDENE FLUORIDE, AND FROM ABOUT 12 TO ABOUT 30 PERCENT BY WEIGHT OF CARBON BLACK, AND SAID FRICTION MATERIAL FURTHER CONTAINING FROM ABOUT 20 TO ABOUT 50 PERCENT BY WEIGHT OF CERAMIC PARTICLES OF FROM ABOUT 0.0001 INCH TO ABOUT 0.005 INCH IN EFFECTIVE DIAMETER INTERMIXED WITH AND DISPERSED THROUGHOUT SAID FRICTION MATERIAL IN MECHANICALLY HELD NONBONDED RELATION TO PROVIDE A FRICTION SURFACE OF SAID ARTICLE OF MANUFACTURE INCLUDING THE SAID IMATIX AND SAID CERAMIC PARTICLES.
Claim 2
Dependent Claim
104 words
AS A ARTICLE OF MANUFACTURE A FRICTION MATERIAL FORMED OF A MATRIX COMPRISING FROM ABOUT 30 TO ABOUT 50 PERCENT BY WEIGHT OF A COPOLYMER OF HEXAFLUOROPROPYLENE AND VINYLIDENE FLUORIDE, AND FROM ABOUT 12 TO ABOUT 30 PERCENT BY WEIGHT OF CARBON BLACK, AND SAID FRICTION MATERIAL FURTHER CONTAINING FROM ABOUT 20 TO ABOUT 50 PERCENT BY WEIGHT OF CERAMIC PARTICLES OF FROM ABOUT 0.0001 INCH TO ABOUT 0.005 INCH IN EFFECTIVE DIAMETER INTERMIXED WITH AND DISPERSED THROUGHOUT SAID FRICTION MATERIAL IN MECHANICALLY HELD NONBONDED RELATION TO PROVIDE A FRICTION SURFACE OF SAID ARTICLE OF MANUFACTURE INCLUDING THE SAID IMATIX AND SAID CERAMIC PARTICLES.
Claim 3
Dependent Claim
104 words
A friction material composition consistIng essentially of a matrix having from about 30 to about 50 percent by weight of a copolymer of hexafluoropropylene and vinylidene fluoride, and from about 12 to about 30 percent by weight of carbon black; and said friction material further consisting of from about 20 to about 50 percent by weight of ceramic particles having a minimum size of 0.0001 inch which are dispersed throughout the copolymer matrix in mechanically held nonbonded relation and assuring a relatively high surface concentration of the ceramic particles to provide a friction surface of said friction material including said matrix and said particles.
Claim 4
Dependent Claim
104 words
A friction material composition consistIng essentially of a matrix having from about 30 to about 50 percent by weight of a copolymer of hexafluoropropylene and vinylidene fluoride, and from about 12 to about 30 percent by weight of carbon black; and said friction material further consisting of from about 20 to about 50 percent by weight of ceramic particles having a minimum size of 0.0001 inch which are dispersed throughout the copolymer matrix in mechanically held nonbonded relation and assuring a relatively high surface concentration of the ceramic particles to provide a friction surface of said friction material including said matrix and said particles.
Claim 5
Dependent Claim
39 words
The friction material composition of claim 2 wherein said particles are glass fibers of a size from about 0.0001 inch to about 0.005 inch in diameter and having a length to diameter ratio of from about 3 to 10,000.
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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) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |