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Patent US4708325A successfully refreshed from Google Patents.
US4708325A
Expired / Lapsed
US
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Induction heating system for reheating the edges of a metallurgical product and variable air gap inductor associated therewith
Assignee: Rotelec SA
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Filing: 1986-05-28
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Granted: 1987-11-24
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Expires: 2006-05-28
Abstract
Abstract The device for inductively reheating the verges of a metallurgical product moving down a production line comprises wound pole inductors with C-shaped magnetic yokes, arranged laterally straddling the path followed by the verges. The two arms of the C are trunnioned to open to a greater or lesser extent, providing a variable air gap, controlled by a cylinder.
Inventors
- 👤 Philippe Georges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:21
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/101; H05B6/103; H05B6/104; H05B6/36; H05B6/365; B; B21; B21B; B21B45/00; B21B45/004
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
133 words
A device for the inductive reheating of the verges of a metallurgical product moving down a production line, of the type comprising inductors with C-shaped magnetic yokes set up laterally along the path followed by the verges and straddling said verges, the ends of each yoke facing one another and forming wound magnetic poles of opposite polarity, said device wherein said yokes are formed, for purpose of varying the air gap, or spacing between said poles, of two legs, joined by a hinge swivelable about an axis, each leg being made of a laminate having, at least at the level of the hinge, forming flanges thereon and two side cheeks accommodating two trunnions which do not traverse the laminate, and wherein a semicylindrical clearance is provided between the laminates of the two legs.
Claim 2
Independent Claim
133 words
A device for the inductive reheating of the verges of a metallurgical product moving down a production line, of the type comprising inductors with C-shaped magnetic yokes set up laterally along the path followed by the verges and straddling said verges, the ends of each yoke facing one another and forming wound magnetic poles of opposite polarity, said device wherein said yokes are formed, for purpose of varying the air gap, or spacing between said poles, of two legs, joined by a hinge swivelable about an axis, each leg being made of a laminate having, at least at the level of the hinge, forming flanges thereon and two side cheeks accommodating two trunnions which do not traverse the laminate, and wherein a semicylindrical clearance is provided between the laminates of the two legs.
Claim 3
Dependent Claim
41 words
A device for the inductive reheating of the verges of a metallurgical product as in claim 1, provided with a control means, for adjusting the opening of said hinged legs, which control means is itself controlled by product position sensing means.
Claim 4
Dependent Claim
15 words
A device as in claim 2, wherein said control means is a double acting cylinder.
Claim 5
Dependent Claim
19 words
A device as in claim 3, wherein said control means act on the upper leg of said inductor yokes.
Claim 6
Dependent Claim
15 words
A device as in claim 2, wherein said inductors are provided with lateral guiding means.
Claim 7
Dependent Claim
99 words
An inductor for use in a device for the inductive reheating of the verges of a metallurgical product moving down a production line, having a C-shaped magnetic yoke with facing coil-wound poles, wherein said yoke consists of two legs joined by a hinge rotating about an axis, each leg consisting of a laminate of ferromagnetic sheets sandwiched between side cheeks accommodating two trunnions, one in each side of the laminates, aligned with said hinge axis, wherein a semicylindrical working clearance is provided between the two legs and wherein control means are provided to adjust the opening of the legs.
Claim 8
Dependent Claim
99 words
An inductor for use in a device for the inductive reheating of the verges of a metallurgical product moving down a production line, having a C-shaped magnetic yoke with facing coil-wound poles, wherein said yoke consists of two legs joined by a hinge rotating about an axis, each leg consisting of a laminate of ferromagnetic sheets sandwiched between side cheeks accommodating two trunnions, one in each side of the laminates, aligned with said hinge axis, wherein a semicylindrical working clearance is provided between the two legs and wherein control means are provided to adjust the opening of the legs.
Claim 9
Dependent Claim
14 words
An inductor according to claim 6, wherein said control means include a double-acting cylinder.
Claim 10
Dependent Claim
17 words
Inductor as in claims 6, wherein said control means act upon the upper leg of the yoke.
Claim 11
Dependent Claim
14 words
Inductor as in claims 6, the poles whereof are provided with a heat shield.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-23 | 1991-05-25 | 1991-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-23 | 1995-05-25 | 1995-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-23 | 1999-05-25 | 1999-11-24 | $7700.00 | Window Closed / Lapsed |