US2848795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction elements
Assignee: American Brake Shoe Co
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Filing: 1955-06-23
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Granted: 1958-08-26
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Expires: 1975-06-23
Abstract
No abstract record available.
Inventors
- 👤 Francis J Lowey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:31
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/02; F16D69/027; C; C22; C22C; C22C33/00; C22C33/02; C22C33/0207; C22C33/0228
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
136 words
A POWDERED METAL FRICTION ELEMENT PRODUCED FROM PRESSED AND SINTERED POWDERED INGREDIENTS AND CONSISTING ESSENTIALLY OF THE FOLLOWING IN MINIMUM PROPORTION AND RATIO: 80 PARTS BY WEIGHT OF POWDERED IRON, AND 2 PARTS BY WEIGHT OF POWDERED TIN BINDING AND COALESCING THE IRON INTO A DENSE, HARD ESSENTIALLY IRON MATRIX; SAID MATRIX CONTAINING 2 PARTS BY WEIGHT OF LEAD AND 4 PARTS BY WEIGHT OF GRAPHITE SERVING FRICTION MODIFIERS; AND SAID MATRIX CONTAINING 2 PARTS BY WEIGHT OF MOLYBDENUM SULFIDE AND 3 PARTS BY WEIGHT OF ALUMINA TOGETHER IMPARTMENT HIGH STRENGTH TO SAID MATRIX, IMPARTING HIGH HEAT RESISTANCE TO THE FRICTION ELEMENT AS A WHOLE, AND IMPARTING ANTI-WELD CHARACTERISTICS TO THE WEAR FACE OF SAID FRICTION ELEMENT THEREBY PREVENTING UNDUE WELDING OF THE WEAR FACE OF THE FRICTION ELEMENT TO THE OPPOSING FRICTION MEMBER IN USE.
References Cited (Backward Citations)
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Cited
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US2300118A
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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) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |