US3686459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple inductor unit for induction heat device
Assignee: Park Ohio Holdings Corp
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Filing: 1971-10-20
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Granted: 1972-08-22
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Expires: 1991-10-20
Abstract
Abstract In an induction heating device for inductively heating adjacent, first and second generally conical surfaces having generally parallel axes, which device includes at least two inductor units each having a secondary for energizing an inductor thereon, there is provided a common primary surrounding both secondary windings to allow heating of the closely spaced conical surfaces.
Inventors
- 👤 John C Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:11
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/101
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
150 words
In an induction heating device for inductively heating adjacent, first and second generally conical surfaces having generally parallel axes, said device comprising: a first inductor unit for inductively heating said first surface; a second inductor unit for inductively heating said second unit; each of said units including an inductor generally matching its respective surface, means for supporting said inductor, a transformer secondary electrically connected to said inductor and carried by said support means, and means for moving said support means in a direction generally parallel with said surface axis between a first position with said inductor substantially spaced from said respective surface and a second position with said inductor adjacent to its respective surface; and means for inducing current flow into said transformer secondary, the improvement comprising: said current inducing means includes a single multi-turn primary winding surrounding both of said transformer secondaries of said first and second inductor units.
Claim 2
Dependent Claim
150 words
In an induction heating device for inductively heating adjacent, first and second generally conical surfaces having generally parallel axes, said device comprising: a first inductor unit for inductively heating said first surface; a second inductor unit for inductively heating said second unit; each of said units including an inductor generally matching its respective surface, means for supporting said inductor, a transformer secondary electrically connected to said inductor and carried by said support means, and means for moving said support means in a direction generally parallel with said surface axis between a first position with said inductor substantially spaced from said respective surface and a second position with said inductor adjacent to its respective surface; and means for inducing current flow into said transformer secondary, the improvement comprising: said current inducing means includes a single multi-turn primary winding surrounding both of said transformer secondaries of said first and second inductor units.
Claim 3
Dependent Claim
22 words
The improvement as defined in claim 1 wherein said secondaries of said first and said second inductor units are single turn sEcondaries.
Claim 4
Dependent Claim
41 words
The improvement as defined in claim 1 wherein said secondaries each include a central axis generally parallel to said surface axes and said secondary axes are spaced from each other a distance substantially greater than said spacing of said surface axes.
Claim 5
Dependent Claim
110 words
An induction heating device for heating two spaced portions of a workpiece, said device comprising: a first inductor unit including a first inductor adapted to heat the first of said portions and a first secondary winding connected to said first inductor, said first secondary having a first central axis; a second inductor unit including a second inductor adapted to heat the second of said portions and a second secondary winding connected to said second inductor and generally beside said first secondary, said second secondary having a second central axis parallel to and spaced from said first central axis and a single multi-turn primary winding surrounding said first and second secondaries.
Claim 6
Dependent Claim
110 words
An induction heating device for heating two spaced portions of a workpiece, said device comprising: a first inductor unit including a first inductor adapted to heat the first of said portions and a first secondary winding connected to said first inductor, said first secondary having a first central axis; a second inductor unit including a second inductor adapted to heat the second of said portions and a second secondary winding connected to said second inductor and generally beside said first secondary, said second secondary having a second central axis parallel to and spaced from said first central axis and a single multi-turn primary winding surrounding said first and second secondaries.
Claim 7
Dependent Claim
35 words
An induction heating device as defined in claim 4 wherein said first and second inductors have axes spaced from each other a distance less than the spacing between said first and said second central axes.
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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |