US3131470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making valve lifters
Assignee: Burgess Norton Manufacturing Co Inc
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Filing: 1960-12-09
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Granted: 1964-05-05
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Expires: 1980-12-09
Abstract
No abstract record available.
Inventors
- 👤 Gustav M Waller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:44
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/0008; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49247
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
192 words
A METHOD OF MAKING A VALVE LIFTER COMPRISING, PRODUCING A TUBULAR ROD OPEN AT ONE END AND HAVING AN INTERNAL CYLINDRICAL WALL SURFACE ADJACENT SAID OPEN END, PRODUCING A HEAD HAVING A CYLINDRICAL PORTION FITTING INSIDE SAID INTERNAL WALL SURFACE THROUGH SAID END, A FLAT OUTER SURFACE AND A CENTRAL BORE THROUGH SAID CYLINDRICAL PORTION AND COMMUNICATING WITH SAID SURFACE, PRODUCING A CARBIDE FACING MEMBER FOR COVERING SAID SURFACE, INTRODUCING A RING OF BRAZING METAL INTO SAID OPEN END, INTRODUCING A ROD OF BRAZING METAL INTO SAID BORE, INSERTING SAID CYLINDRICAL PORTION INTO SAID OPEN END TO FIT INSIDE SAID INTERNAL WALL SURFACE, PLACING THE SURFACE OF SAID HEAD ON SAID FACING MEMBER AND HEATING SAID PARTS WHILE IN SUCH UPRIGHT POSITION TO A TEMPERATURE ABOVE THE MELTING POINT OF THE BRAZING METAL TO MELT SAID METAL AND PERMIT THE METAL FROM SAID RING TO FLOW BETWEEN THE CYLINDRICAL PORTION OF THE HEAD AND THE INTERNAL WALL SURFACE ADJACENT THE OPEN END OF THE TUBULAR ROD AND THE METAL FROM SAID ROD TO FLOW BETWEEN THE END SURFACE OF SAID HEAD AND SAID FACING AND COOLING SAID PARTS WHILE IN SUCH POSITION.
Claim 2
Independent Claim
192 words
A METHOD OF MAKING A VALVE LIFTER COMPRISING, PRODUCING A TUBULAR ROD OPEN AT ONE END AND HAVING AN INTERNAL CYLINDRICAL WALL SURFACE ADJACENT SAID OPEN END, PRODUCING A HEAD HAVING A CYLINDRICAL PORTION FITTING INSIDE SAID INTERNAL WALL SURFACE THROUGH SAID END, A FLAT OUTER SURFACE AND A CENTRAL BORE THROUGH SAID CYLINDRICAL PORTION AND COMMUNICATING WITH SAID SURFACE, PRODUCING A CARBIDE FACING MEMBER FOR COVERING SAID SURFACE, INTRODUCING A RING OF BRAZING METAL INTO SAID OPEN END, INTRODUCING A ROD OF BRAZING METAL INTO SAID BORE, INSERTING SAID CYLINDRICAL PORTION INTO SAID OPEN END TO FIT INSIDE SAID INTERNAL WALL SURFACE, PLACING THE SURFACE OF SAID HEAD ON SAID FACING MEMBER AND HEATING SAID PARTS WHILE IN SUCH UPRIGHT POSITION TO A TEMPERATURE ABOVE THE MELTING POINT OF THE BRAZING METAL TO MELT SAID METAL AND PERMIT THE METAL FROM SAID RING TO FLOW BETWEEN THE CYLINDRICAL PORTION OF THE HEAD AND THE INTERNAL WALL SURFACE ADJACENT THE OPEN END OF THE TUBULAR ROD AND THE METAL FROM SAID ROD TO FLOW BETWEEN THE END SURFACE OF SAID HEAD AND SAID FACING AND COOLING SAID PARTS WHILE IN SUCH POSITION.
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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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |