Patent US5403994A successfully refreshed from Google Patents.
US5403994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selectively adjustable transverse flux heating apparatus
Assignee: Ajax Tocco Magnethermic Corp
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Filing: 1994-02-14
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Granted: 1995-04-04
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Expires: 2014-02-14
Abstract
Abstract Transverse flux heating assembly for inductively heating a moving strip includes opposite spaced J-shaped conductors to form an inductive heating coil. The coils define a middle spacing therebetween which is unobstructed by flux guides to permit free translation movement between the conductors in a direction parallel to the strip width. The inductors provide a fully adjustable coil width to accommodate different strip widths in the heating operation.
Inventors
- 👤 George Havas
- 👤 Charles N. Howell
- 👤 Joseph E. Quaranta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:12
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/36; H05B6/362; C; C21; C21D; C21D9/00; C21D9/52; C21D9/54; C21D9/56; C21D9/60; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
100 words
An adjustable width transverse flux heating assembly for induction heating of a workpiece including first and second J-shaped conductors disposed in a common plane to comprise an inductive coil and to form a middle spacing in an internal cross-sectional area of the coil; and first and second flux guides associated respectively with the first and second J-shaped conductors to enhance communication of a magnetic field in a direction transverse to the common plane, wherein the flux guides are disposed about the conductors and spaced from the middle spacing to accommodate selective relative translation of the conductors in the common plane.
Claim 2
Dependent Claim
100 words
An adjustable width transverse flux heating assembly for induction heating of a workpiece including first and second J-shaped conductors disposed in a common plane to comprise an inductive coil and to form a middle spacing in an internal cross-sectional area of the coil; and first and second flux guides associated respectively with the first and second J-shaped conductors to enhance communication of a magnetic field in a direction transverse to the common plane, wherein the flux guides are disposed about the conductors and spaced from the middle spacing to accommodate selective relative translation of the conductors in the common plane.
Claim 3
Dependent Claim
23 words
The heating assembly as defined in claim 1 wherein each of the flux guides are disposed on a first side of the conductors.
Claim 4
Dependent Claim
38 words
The heating assembly as defined in claim 1 wherein each of the flux guides are disposed on a first and second side of the conductors, wherein the second side is opposite of the conductor from the middle spacing.
Claim 5
Dependent Claim
39 words
The heating means as defined in claim 1 wherein the conductors include adjacent straight end portions and further include a means for shielding flux lines from being communicated away from the inductive coil at the adjacent straight end portions.
Claim 6
Dependent Claim
33 words
The heating means as defined in claim 4 wherein the means for shielding comprises a flag portion depending from the first J-shaped conductor and extending across the second J-shaped conductor intermediate the conductors.
Claim 7
Dependent Claim
87 words
An induction heating system for metal strip particularly suitable for ready adjustment in heating zone width for ease in accommodation of selectively varying strip widths including opposed J-shaped conductors disposed in a common plane to form an inductive heating coil wherein a middle spacing defined by inner perimeters of the conductors is unobstructed for free selective relative movement of the conductors to one another; and means for shielding flux lines from being communicated away from the coil disposed at adjacent conductor portions exterior of the middle spacing.
Claim 8
Dependent Claim
87 words
An induction heating system for metal strip particularly suitable for ready adjustment in heating zone width for ease in accommodation of selectively varying strip widths including opposed J-shaped conductors disposed in a common plane to form an inductive heating coil wherein a middle spacing defined by inner perimeters of the conductors is unobstructed for free selective relative movement of the conductors to one another; and means for shielding flux lines from being communicated away from the coil disposed at adjacent conductor portions exterior of the middle spacing.
Claim 9
Dependent Claim
32 words
The induction heating system as defined in claim 6 wherein the means for shielding comprises a flag portion of a first J-shaped conductor extending over and across an opposed second J-shaped conductor.
References Cited (Backward Citations)
US2448009A
Cited
US3444346A
Cited
US3842234A
Cited
US4185183A
Cited
US4300031A
Cited
US4258241A
Cited
GB2144609A
Cited
US4694134A
Cited
US4795872A
Cited
US4751360A
Cited
US4891484A
Cited
WO1990007584A1
Cited
US5001319A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-04-03 | 1998-10-03 | 1999-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-03 | 2002-10-03 | 2003-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-03 | 2006-10-03 | 2007-04-04 | $7700.00 | Window Closed / Lapsed |