US3221392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making bearings
Assignee: Federal Mogul Bower Bearings Inc
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Filing: 1964-07-30
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Granted: 1965-12-07
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Expires: 1984-07-30
Abstract
No abstract record available.
Inventors
- 👤 James C Gould
- 👤 Gallatin Victor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:30
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/06; F16C33/14; F16C2220/00; F16C2220/20; F16C2223/00; F16C2223/30; F16C2223/32; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12493; Y10T428/12687; Y10T428/12694; Y10T428/12736; Y10T428/1275; Y10T428/12757
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
91 words
THE METHOD OF MAKING AN ALUMINUM LEAD ALLOY CONTAINING UP TO ABOUT 70% LEAD OF WHICH UP TO ABOUT 5% THEREOF IS IN THE FORM OF LEAD MONOXIDE COMPRISING THE STEPS OF PROVIDING A POWDER BLEND OF ALUMINUM AND LEAD MONOXIDE POWDERS, PREHEATING THE SAID POWDER BLEND AT A TEMPERATURE RANGING FROM ABOUT 800*F. TO ABOUT 1100*F. IN A REDUCING ATMOSPHERE UNTIL SUBSTANTIALLY ALL OF THE LEAD MONOXIDE IS REDUCED TO METALLIC LEAD, COMPACTING THE PREHEATED SAID POWDER BLEND INTO A RELATIVELY DENSE MASS, AND THEREAFTER COOLING THE SAID DENSE MASS.
Claim 2
Independent Claim
91 words
THE METHOD OF MAKING AN ALUMINUM LEAD ALLOY CONTAINING UP TO ABOUT 70% LEAD OF WHICH UP TO ABOUT 5% THEREOF IS IN THE FORM OF LEAD MONOXIDE COMPRISING THE STEPS OF PROVIDING A POWDER BLEND OF ALUMINUM AND LEAD MONOXIDE POWDERS, PREHEATING THE SAID POWDER BLEND AT A TEMPERATURE RANGING FROM ABOUT 800*F. TO ABOUT 1100*F. IN A REDUCING ATMOSPHERE UNTIL SUBSTANTIALLY ALL OF THE LEAD MONOXIDE IS REDUCED TO METALLIC LEAD, COMPACTING THE PREHEATED SAID POWDER BLEND INTO A RELATIVELY DENSE MASS, AND THEREAFTER COOLING THE SAID DENSE MASS.
Claim 3
Independent Claim
179 words
THE METHOD OF MAKING A COMPOSITE STRIP SUITABLE FOR THE MANUFACTURE OF BEARINGS AND THE LIKE COMPRISING THE STEPS OF PROVIDING A HARD METAL BACKING STRIP AND A SUBSTANTIALLY HOMOGENEOUS POWDER BLEND OF ALUMINUM POWDER AND LEAD MONOXIDE POWDER IN THE PROPORTIONS OF UP TO ABOUT 72% LEAD MONOXIDE POWDER AND THE BALANCE ALUMINUM POWDER, SUPERPOSING A RELATIVELY UNIFORM LAYER OF SAID POWDER BLEND ON SAID BACKING STRIP, PREHEATING SAID LAYER OF SAID POWDER BLEND IN A REDUCING ATMOSPHERE AT A TEMPERATURE RANGING FROM ABOUT 800*F. TO ABOUT 1100*F. FOR A PERIOD OF TIME SUFFICINT TO SUBSTANTIALLY COMPLETELY REDUCE SAID LEAD MONOXIDE TO METALLIC LEAD, DENSIFYING THE PREHEATED SAID LAYER ON SAID BACKING STRIP BY PASSING SAID STRIP AND SAID LAYER THEREON THEREOF A PAIR OF ROLLS, ONE OF SAID PAIRS OF ROLLS IN CONTACT WITH SAID LAYER RELATING AT A PERIPHERAL SPEED LESS THAN THE LINEAR SPEED OF SAID LAYER CAUSING CONCURRENT COMPACTING AND EXTRUSION OF SAID LAYER AND TENACIOUSLY BONDING SAID LAYER TO SAID BACKING STRIP, AND THEREAFTER RAPIDLY COOLING SAID COMPOSITE STRIP IN A NON-OXIDIZING ATMOSPHERE.
Claim 4
Independent Claim
179 words
THE METHOD OF MAKING A COMPOSITE STRIP SUITABLE FOR THE MANUFACTURE OF BEARINGS AND THE LIKE COMPRISING THE STEPS OF PROVIDING A HARD METAL BACKING STRIP AND A SUBSTANTIALLY HOMOGENEOUS POWDER BLEND OF ALUMINUM POWDER AND LEAD MONOXIDE POWDER IN THE PROPORTIONS OF UP TO ABOUT 72% LEAD MONOXIDE POWDER AND THE BALANCE ALUMINUM POWDER, SUPERPOSING A RELATIVELY UNIFORM LAYER OF SAID POWDER BLEND ON SAID BACKING STRIP, PREHEATING SAID LAYER OF SAID POWDER BLEND IN A REDUCING ATMOSPHERE AT A TEMPERATURE RANGING FROM ABOUT 800*F. TO ABOUT 1100*F. FOR A PERIOD OF TIME SUFFICINT TO SUBSTANTIALLY COMPLETELY REDUCE SAID LEAD MONOXIDE TO METALLIC LEAD, DENSIFYING THE PREHEATED SAID LAYER ON SAID BACKING STRIP BY PASSING SAID STRIP AND SAID LAYER THEREON THEREOF A PAIR OF ROLLS, ONE OF SAID PAIRS OF ROLLS IN CONTACT WITH SAID LAYER RELATING AT A PERIPHERAL SPEED LESS THAN THE LINEAR SPEED OF SAID LAYER CAUSING CONCURRENT COMPACTING AND EXTRUSION OF SAID LAYER AND TENACIOUSLY BONDING SAID LAYER TO SAID BACKING STRIP, AND THEREAFTER RAPIDLY COOLING SAID COMPOSITE STRIP IN A NON-OXIDIZING ATMOSPHERE.
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) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |