US3349463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making valves for internal combustion engines
Assignee: Engineering Dev Corp
•
Filing: 1964-08-06
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Granted: 1967-10-31
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Expires: 1984-08-06
Abstract
No abstract record available.
Inventors
- 👤 Le Roy O Kittelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:33
CPC Classifications
B; B23; B23P; B23P15/00; B23P15/001; B23P15/002; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49298; Y10T29/49302; Y10T29/49314; Y10T29/49718; Y10T29/49746
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
185 words
THE METHOD OF MAKING A METALLIC BODY SUCH AS A POPPET VALVE FOR AN INTERNAL COMBUSTION ENGINE OR THE LIKE, USING AT LEAST TWO DISTINGUISHABLE PORTIONS OF AT LEAST TWO UNLIKE ALLOYS, COMPRISING THE STEPS OF: (A) FORMING FROM A BODY OF ALLOYED METAL HAVING A PREDETERMINED COEFFICIENT OF EXPANSION AND HIGH STRENGTH AND DUCTILITY AN INITIAL VALVE BODY BLANK INCLUDING: A STEM SECTION, AND AN INTEGRAL UNDERSIZE BELL SECTION MERGING WITH A SUBSTANTIALLY FULL DIAMETER HEAD THINNER THAN THE DESIRED FINISHED VALVE; (B) ROTATING THE VALVE BLANK ABOUT ITS AXIS WITH THE STEM UPWARD AND FLAME-WELD DEPOSITING A WELDED METAL ALLOY COLLAR OF SUBTANTIAL THICKNESS CONTINUOUSLY AROUND THE BACKSIDE OF THE HEAD FROM ITS PERIPHERY TO THE BELL SECTION AND TO AND BEYOND THE JUNCTURE OF THE STEM AND BELL SECTIONS, SAID METAL ALLOY COLLAR HAVING A HIGHER COEFFICIENT OF EXPANSION AND GREATER ANTI-EROSIVE AND SHOCK RESISTANT PROPERTIES THAN THE ALLOYED METAL OF THE VALVE BODY AND CONTAINING PRINCIPALLY COBALT AND CHROMIUM; (C) MACHINING THE MULTIPLE PORTIONED METALLIC BODY TO NEAR FINAL SPECIFICATION DIMENSIONS; AND (D) POLISHING THE VALVE SEALING SURFACES TO FINAL DIMENSIONS.
Claim 2
Independent Claim
185 words
THE METHOD OF MAKING A METALLIC BODY SUCH AS A POPPET VALVE FOR AN INTERNAL COMBUSTION ENGINE OR THE LIKE, USING AT LEAST TWO DISTINGUISHABLE PORTIONS OF AT LEAST TWO UNLIKE ALLOYS, COMPRISING THE STEPS OF: (A) FORMING FROM A BODY OF ALLOYED METAL HAVING A PREDETERMINED COEFFICIENT OF EXPANSION AND HIGH STRENGTH AND DUCTILITY AN INITIAL VALVE BODY BLANK INCLUDING: A STEM SECTION, AND AN INTEGRAL UNDERSIZE BELL SECTION MERGING WITH A SUBSTANTIALLY FULL DIAMETER HEAD THINNER THAN THE DESIRED FINISHED VALVE; (B) ROTATING THE VALVE BLANK ABOUT ITS AXIS WITH THE STEM UPWARD AND FLAME-WELD DEPOSITING A WELDED METAL ALLOY COLLAR OF SUBTANTIAL THICKNESS CONTINUOUSLY AROUND THE BACKSIDE OF THE HEAD FROM ITS PERIPHERY TO THE BELL SECTION AND TO AND BEYOND THE JUNCTURE OF THE STEM AND BELL SECTIONS, SAID METAL ALLOY COLLAR HAVING A HIGHER COEFFICIENT OF EXPANSION AND GREATER ANTI-EROSIVE AND SHOCK RESISTANT PROPERTIES THAN THE ALLOYED METAL OF THE VALVE BODY AND CONTAINING PRINCIPALLY COBALT AND CHROMIUM; (C) MACHINING THE MULTIPLE PORTIONED METALLIC BODY TO NEAR FINAL SPECIFICATION DIMENSIONS; AND (D) POLISHING THE VALVE SEALING SURFACES TO FINAL DIMENSIONS.
References Cited (Backward Citations)
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US2277571A
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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) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |