Patent US3403241A successfully refreshed from Google Patents.
US3403241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction heating element
Assignee: Ohio Crankshaft Co
•
Filing: 1966-08-22
•
Granted: 1968-09-24
•
Expires: 1986-08-22
Abstract
No abstract record available.
Inventors
- 👤 Harry D Kauffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:41
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/32
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
136 words
IN AN INDUCTION HEATING DEVICE PARTICULARLY ADAPTED FOR HEATING TOOTHED WORKPIECES SUCH AS GEARS DURING HEAT TREATMENT PROCESSING OF THE TOOTH SURFACES, THE COMBINATION OF TWO SETS OF CONDUCTOR COILS MOUNTED IN DIVERGING RELATION CORRESPONDING TO THE RELATION OF THE TOOTH FLANK SURFACES OF ADJACENT GEAR TEETH, EACH SET OF COILS INCLUDING AT LEAST TWO COILS HAVING ONE COMMON CONDUCTOR AND EXTENDING ALONG AND DEFINING A SURFACE CORRESPONDING TO ONE OF THE TOOTH FLANK SURFACES WHEREBY FLOW OF ALTERNATING CURRENT THROUGH EACH OF SAID SET OF COILS WILL RESULT IN OPPOSED CURRENT FLOW THROUGH THE RESPECTIVE COILS OF EACH SET AT ANY INSTANT, AND MEANS FOR MOUNTING A TOOTHED WORKPIECE AND SAID SETS OF COILS FOR RELATIVE MOVEMENT DURING WHICH THE RESPECTIVE SETS OF COILS INDUCE ELECTRICAL HEATING CURRENTS IN OPPOSED WALL SURFACES OF ADJACENT TEETH.
References Cited (Backward Citations)
US2810054A
Cited
US3185808A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-24 | 1972-03-25 | 1972-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-24 | 1976-03-25 | 1976-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-24 | 1980-03-25 | 1980-09-24 | $7700.00 | Window Closed / Lapsed |