US3156589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a composite bronze gear ring
Assignee: Ampco Metal Inc
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Filing: 1961-04-27
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Granted: 1964-11-10
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Expires: 1981-04-27
Abstract
No abstract record available.
Inventors
- 👤 John F Klement
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:46
CPC Classifications
B; B22; B22D; B22D19/00; B22D19/08; B22D19/085; B22D13/00; B22D13/04; B32; B32B; B32B15/00; B32B15/01; F; F16; F16H; F16H55/00; F16H55/02; F16H55/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
197 words
A METHOD OF FORMING A COMPOSITE BRONZE GEAR RING, COMPRISING THE STEPS OF POURING A MOLTEN TIN BRONZE ALLOY CONTAINING FROM 9% TO 14% TIN INTO A ROTATING MOLD TO CENTRIFUGALLY CAST AN OUTER SECTION OF THE GEAR RING, COOLING THE OUTER SECTION TO A TEMPERATURE IN THE RANGE OF 1800*F. TO 1900*F. WHILE ROTATING THE MOLD, POURING A MOLTEN COPPER BASE ALLOY INTO THE MOLD WHILE ROTATING THE SAME TO CENTRIFUGALLY CAST THE COPPER BASE ALLOY AGAINST THE INNER SURFACE OF THE OUTER SECTION TO FORM AN INNER SECTION OF THE GEAR RING, SAID COPPER BASE ALLOY HAVING A COEFFICIENT OF THERMAL CONDUCTIVITY GREATER THAN 22 B.T.U./SQ. FT./FT./HR./*F. AND BEING BONDED TO THE FIRST SECTION TO PROVIDE A COMPOSITE BRONZE GEAR RING, COOLING THE COMPOSITE GEAR RING TO A TEMPERATURE IN THE RANGE OF 700*F. TO 1100*F. AT A RATE FASTER THAN 200* F. PER MINUTE PER INCH OF SECTION THICKNESS, AND COOLING THE GEAR RING FROM SAID TEMPERATURE IN THE RANGE OF 700* F. TO 1100*F. TO ROOM TEMPERATURE AT A RATE SLOWER THAN 500*F. PER MINUTE PER INCH OF SECTION THICKNESS TO PROVIDE A CHILLED SURFACE FOR THE OUTER SECTION OF THE GEAR RING.
Claim 2
Independent Claim
197 words
A METHOD OF FORMING A COMPOSITE BRONZE GEAR RING, COMPRISING THE STEPS OF POURING A MOLTEN TIN BRONZE ALLOY CONTAINING FROM 9% TO 14% TIN INTO A ROTATING MOLD TO CENTRIFUGALLY CAST AN OUTER SECTION OF THE GEAR RING, COOLING THE OUTER SECTION TO A TEMPERATURE IN THE RANGE OF 1800*F. TO 1900*F. WHILE ROTATING THE MOLD, POURING A MOLTEN COPPER BASE ALLOY INTO THE MOLD WHILE ROTATING THE SAME TO CENTRIFUGALLY CAST THE COPPER BASE ALLOY AGAINST THE INNER SURFACE OF THE OUTER SECTION TO FORM AN INNER SECTION OF THE GEAR RING, SAID COPPER BASE ALLOY HAVING A COEFFICIENT OF THERMAL CONDUCTIVITY GREATER THAN 22 B.T.U./SQ. FT./FT./HR./*F. AND BEING BONDED TO THE FIRST SECTION TO PROVIDE A COMPOSITE BRONZE GEAR RING, COOLING THE COMPOSITE GEAR RING TO A TEMPERATURE IN THE RANGE OF 700*F. TO 1100*F. AT A RATE FASTER THAN 200* F. PER MINUTE PER INCH OF SECTION THICKNESS, AND COOLING THE GEAR RING FROM SAID TEMPERATURE IN THE RANGE OF 700* F. TO 1100*F. TO ROOM TEMPERATURE AT A RATE SLOWER THAN 500*F. PER MINUTE PER INCH OF SECTION THICKNESS TO PROVIDE A CHILLED SURFACE FOR THE OUTER SECTION OF THE GEAR RING.
References Cited (Backward Citations)
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US1212608A
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US2042800A
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US2710997A
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US2681485A
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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) | 1967-11-10 | 1968-05-11 | 1968-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-10 | 1972-05-11 | 1972-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-10 | 1976-05-11 | 1976-11-10 | $7700.00 | Window Closed / Lapsed |