US2818359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making flanged cylinder liners
Assignee: Motors Liquidation Co
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Filing: 1954-03-01
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Granted: 1957-12-31
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Expires: 1974-03-01
Abstract
No abstract record available.
Inventors
- 👤 Belle Jack E La
- 👤 Gilbert M Lahr
- 👤 John S Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:28
CPC Classifications
C; C21; C21D; C21D7/00; C21D7/02; C21D7/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
121 words
THE METHOD OF MAKING A FLANGED CYLINDER LINER OF CAST IRON WHICH COMPRISES CASTING THE IRON INTO CYLINDRICAL SHAPE, ROUGH MACHINING THE LINER SUBSTANTIALLY TO FINAL SHAPE BUT SOMEWHAT OVERSIZE AND WITH A FILLETED GROOVE AT THE JUNCTION OF THE EXTERNAL WALL OF THE LINER AND FLANGE HEATING SAID CAST IRON LINER TO A TEMPERATURE ABOVE THE CRITICAL TO AUSTENITIZE THE SAME, QUENCHING SAID HEATED CAST IRON LINER TO HARDEN THE SAME, TEMPERING SAID HARDENED CAST IRON LINER BY REHEATING TO A TEMPERING TEMPERATURE, THEN ANNEALING ONLY THE FLANGE AND CLOSELY ADJACENT PORTIONS INCLUDING SAID FILLET BY REHEATING TO A TEMPEARATURE ON THE ORDER OF 1000*-1400*F., FINISH MACHINING SAID CAST IRON LINER, AND COLD WORKING THE SURFACE OF THE ANNEALED FILLET.
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) | 1960-12-30 | 1961-07-01 | 1961-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-30 | 1965-07-01 | 1965-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-30 | 1969-07-01 | 1969-12-31 | $7700.00 | Window Closed / Lapsed |