US3236993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction heating
Assignee: Delapena and Son Ltd
•
Filing: 1963-05-06
•
Granted: 1966-02-22
•
Expires: 1983-05-06
Abstract
No abstract record available.
Inventors
- 👤 Jones David Griffiths
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:01
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
AN INDUCTOR FOR INDUCTION HEATING A TOOTHED OR SERRATED SURFACE OF AN ELEMENT, COMPRISING A SINGLE TURN CURRENT-CARRYING LOOP PROVIDING A CONTINUOUS CONDUCTIVE PATH WITH A GAP BETWEEN ITS ENDS, SAID INDUCTOR BEING GENERALLY PROFILED TO SUIT THE SURFACE AND HAVING PROJECTIONS WHICH PROJECT INTO THE SPACES BETWEEN THE TEETH OR SERRATIONS WHEN THE ELEMENT AND THE INDUCTOR ARE COAXIALLY ARRANGED, SAID PROJECTIONS EXTENDING RADIALLY OUTWARDLY A DISTANCE GREATER THAN THE GAPS BETWEEN SAID PROJECTIONS, AND A PLURALITY OF U-SHAPED MAGNETIC CORES INDIVIDUALLY ASSOCIATED WITH SAID PROJECTIONS, EACH MAGNETIC CORE STANDING THE INDUCTOR LOOP WITH THE FREE ENDS OF THE LIMBS OF EACH CORE EXTENDING IN THE SAME DIRECTION AS THE RESPECTIVE PROJECTION AND THE OTHER ENDS OF THE LIMBS EXTENDING RADIALLY OUTWARDLY A DISTANCE GREATER THAN THE GAPS BETWEEN SAID PROJECTIONS.
Claim 2
Dependent Claim
132 words
AN INDUCTOR FOR INDUCTION HEATING A TOOTHED OR SERRATED SURFACE OF AN ELEMENT, COMPRISING A SINGLE TURN CURRENT-CARRYING LOOP PROVIDING A CONTINUOUS CONDUCTIVE PATH WITH A GAP BETWEEN ITS ENDS, SAID INDUCTOR BEING GENERALLY PROFILED TO SUIT THE SURFACE AND HAVING PROJECTIONS WHICH PROJECT INTO THE SPACES BETWEEN THE TEETH OR SERRATIONS WHEN THE ELEMENT AND THE INDUCTOR ARE COAXIALLY ARRANGED, SAID PROJECTIONS EXTENDING RADIALLY OUTWARDLY A DISTANCE GREATER THAN THE GAPS BETWEEN SAID PROJECTIONS, AND A PLURALITY OF U-SHAPED MAGNETIC CORES INDIVIDUALLY ASSOCIATED WITH SAID PROJECTIONS, EACH MAGNETIC CORE STANDING THE INDUCTOR LOOP WITH THE FREE ENDS OF THE LIMBS OF EACH CORE EXTENDING IN THE SAME DIRECTION AS THE RESPECTIVE PROJECTION AND THE OTHER ENDS OF THE LIMBS EXTENDING RADIALLY OUTWARDLY A DISTANCE GREATER THAN THE GAPS BETWEEN SAID PROJECTIONS.
References Cited (Backward Citations)
DE892353C
Cited
GB576791A
Cited
DE904804C
Cited
US2857154A
Cited
GB775463A
Cited
US2761048A
Cited
US3121780A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |