Patent US1730639A successfully refreshed from Google Patents.
Patent US3261440A successfully refreshed from Google Patents.
US3261440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake and clutch assembly
Assignee: American Brake Shoe Co
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Filing: 1964-07-06
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Granted: 1966-07-19
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Expires: 1984-07-06
Abstract
No abstract record available.
Inventors
- 👤 Glenn R Graham
- 👤 Arthur C Echler
- 👤 Nitz Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:03
CPC Classifications
F; F16; F16D; F16D25/00; F16D25/12; F16D25/123; Y; Y10; Y10S; Y10S56/00; Y10S56/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A FRICTION ASSEMBLY ADAPTABLE FOR LOW WEAR, COMPARABLE DYNAMIC AND STATIC COEFFICIENT OF FRICTION VALUES, ABSENCE OF CHAR, WELD SEIZURE, AND SCORING, AND RELATIVELY COOL OPERATION, SAID ASSEMBLY BEING OF THE TYPE HAVING MEANS FOR SELECTIVELY CHANGING SPACING BETWEEN A FRICTION FACING MATERIAL AND AN OPPOSING SURFACE MATERIAL FROM A COMPLETE DISENGAGEMENT POSITION TO AN ENGAGED POSITION, SAID ASSEMBLY BEING THE COMBINATION OF: A COOLING OIL, SAID OPPOSING SURFACE MATERIAL EXPOSED TO SAID COOLING OIL, AND SAID FRICTION FACING MATERIAL WITH SAID FRICTION FACING MATERIAL HAVING AN INTERCONNECTING POROSITY AND PERMEABILITY AND COMPRISING MORE THAN 50% BY WEIGHT ELEMENTAL CARBON EXPOSED TO SAID COOLING OIL.
Claim 2
Dependent Claim
105 words
A FRICTION ASSEMBLY ADAPTABLE FOR LOW WEAR, COMPARABLE DYNAMIC AND STATIC COEFFICIENT OF FRICTION VALUES, ABSENCE OF CHAR, WELD SEIZURE, AND SCORING, AND RELATIVELY COOL OPERATION, SAID ASSEMBLY BEING OF THE TYPE HAVING MEANS FOR SELECTIVELY CHANGING SPACING BETWEEN A FRICTION FACING MATERIAL AND AN OPPOSING SURFACE MATERIAL FROM A COMPLETE DISENGAGEMENT POSITION TO AN ENGAGED POSITION, SAID ASSEMBLY BEING THE COMBINATION OF: A COOLING OIL, SAID OPPOSING SURFACE MATERIAL EXPOSED TO SAID COOLING OIL, AND SAID FRICTION FACING MATERIAL WITH SAID FRICTION FACING MATERIAL HAVING AN INTERCONNECTING POROSITY AND PERMEABILITY AND COMPRISING MORE THAN 50% BY WEIGHT ELEMENTAL CARBON EXPOSED TO SAID COOLING OIL.
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) | 1969-07-18 | 1970-01-17 | 1970-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-18 | 1974-01-17 | 1974-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-18 | 1978-01-17 | 1978-07-19 | $7700.00 | Window Closed / Lapsed |