US3372464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of bonding carbide to steel
Assignee: Pan American Petroleum Corp
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Filing: 1965-10-22
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Granted: 1968-03-12
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Renic P Vincent
- 👤 Lawrence B Wilder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:52
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/14; B23K1/18; B23K20/00; B23K20/22; B23K20/227
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A METHOD OF FASTENING A CARBIDE RING HAVING A LONGITUDINAL LENGTH L TO A HLLOW STEEL SHAFT WHICH COMPRISES: (A) CUTTING LONGITUDINAL SLOTS IN THE WALL OF SAID STEEL SHAFT, SAID SLOTS EXTENDING LONGITUDINALLY A DISTANCE IN EXCESS OF L; (B) PLACING SAID CARBIDE RING OVER THE SLOTTED PORTION OF SAID SHAFT; (C) PROVIDING A CLEARANCE BETWEEN SAID SHAFT AND SAID CARBIDE RING, SAID CLEARANCE BEING FOR A LESSER LENGTH THAN THE LENGTH OF SAID CARBIDE RING; (D) PLACING A BRAZING COMPOUND WITHIN SAID CLEARANCE; (E) PLACING A PLUG WITHIN SAID SHAFT ADJACENT SAID SLOTTED PORTION, SAID PLUG HAVING ESSENTIALLY THE SAME THERMAL COEFFICIENT OF EXPANSION AS SAID CARBIDE-RING, AND MAINTAINING SAID PLUG IN FORCEABLE CONTACT WITH THE INTERIOR WALL OF SAID STEEL SHAFT WHILE HEATING THE ASSEMBLY TO A BRAZING TEMPERATURE, AND DURING THE SUBSEQUENT COOLING OF THE ASSEMBLY AFTER THE BRAZED JOINT IS MADE.
Claim 2
Independent Claim
146 words
A METHOD OF FASTENING A CARBIDE RING HAVING A LONGITUDINAL LENGTH L TO A HLLOW STEEL SHAFT WHICH COMPRISES: (A) CUTTING LONGITUDINAL SLOTS IN THE WALL OF SAID STEEL SHAFT, SAID SLOTS EXTENDING LONGITUDINALLY A DISTANCE IN EXCESS OF L; (B) PLACING SAID CARBIDE RING OVER THE SLOTTED PORTION OF SAID SHAFT; (C) PROVIDING A CLEARANCE BETWEEN SAID SHAFT AND SAID CARBIDE RING, SAID CLEARANCE BEING FOR A LESSER LENGTH THAN THE LENGTH OF SAID CARBIDE RING; (D) PLACING A BRAZING COMPOUND WITHIN SAID CLEARANCE; (E) PLACING A PLUG WITHIN SAID SHAFT ADJACENT SAID SLOTTED PORTION, SAID PLUG HAVING ESSENTIALLY THE SAME THERMAL COEFFICIENT OF EXPANSION AS SAID CARBIDE-RING, AND MAINTAINING SAID PLUG IN FORCEABLE CONTACT WITH THE INTERIOR WALL OF SAID STEEL SHAFT WHILE HEATING THE ASSEMBLY TO A BRAZING TEMPERATURE, AND DURING THE SUBSEQUENT COOLING OF THE ASSEMBLY AFTER THE BRAZED JOINT IS MADE.
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) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |