US2863211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction assembly
Assignee: SK Wellman Corp
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Filing: 1955-11-29
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Granted: 1958-12-09
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Expires: 1975-11-29
Abstract
No abstract record available.
Inventors
- 👤 Samuel K Wellman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:53
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0207; C22C33/0228; F; F16; F16D; F16D69/00; F16D69/02; F16D69/027; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12139
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A BRAKE FRICTION MEMBER COMPRISING A METAL BACKING AND A FRICTION FACING, SAID FACING CONSISTING ESSENTIALLY OF ABOUT 80 PERCENT BY WEIGHT OF IRON POWDER FORMING A SUBSTANTIALLY CONTINUOUS SINTERED IRON NETWORK, AND THE BALANCE BEING SUBSTANTIALLY ALL GRAPHITE PARTICLES DISPOSED IN SAID NETWORK TO GENERATE AND MAINTAIN A SUBSTANTIALLY CONTINUOUS GRAPHITIC FILM ON A FRICTION SURFACE OF SAID FACING UPON RUBBING CONTACT WITH ANOTHER SURFACE UNDER A PRESSURE OF MORE THAN ABOUT 30 POUNDS PER SQUARE INCH, SAID FILM BEING GENERATED AND MAINTAINED BY THE COMMINUTION AND SMEARING OF THE GRAPHITE PARTICLES PROGRESSIVELY EXPOSED ON SAID FRICTION SURFACE.
Claim 2
Dependent Claim
99 words
A BRAKE FRICTION MEMBER COMPRISING A METAL BACKING AND A FRICTION FACING, SAID FACING CONSISTING ESSENTIALLY OF ABOUT 80 PERCENT BY WEIGHT OF IRON POWDER FORMING A SUBSTANTIALLY CONTINUOUS SINTERED IRON NETWORK, AND THE BALANCE BEING SUBSTANTIALLY ALL GRAPHITE PARTICLES DISPOSED IN SAID NETWORK TO GENERATE AND MAINTAIN A SUBSTANTIALLY CONTINUOUS GRAPHITIC FILM ON A FRICTION SURFACE OF SAID FACING UPON RUBBING CONTACT WITH ANOTHER SURFACE UNDER A PRESSURE OF MORE THAN ABOUT 30 POUNDS PER SQUARE INCH, SAID FILM BEING GENERATED AND MAINTAINED BY THE COMMINUTION AND SMEARING OF THE GRAPHITE PARTICLES PROGRESSIVELY EXPOSED ON SAID FRICTION SURFACE.
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) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |