Patent US5336868A successfully refreshed from Google Patents.
US5336868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for inductively heating flat metal materials
Assignee: Otto Junker GmbH
•
Filing: 1990-08-27
•
Granted: 1994-08-09
•
Expires: 2010-08-27
Abstract
Abstract A device for inductively heating flat metal objects, with at least one pair of induction coils which form a gap through which the object is moved. The induction coils have an iron core made up of transformer stampings with grooves in which current conductors are arranged. The iron cores of at least one inductor coil have grooves which run in a zig-zag or undulating fashion along the direction of motion of the object being heated. The maximum angle the grooves make with the direction of movement of the object is 60°, and the current conductors are disposed in the grooves so as to follow the zig-zags or undulations thereof. The inductor coils of at least one inductor-coil pair include several side-by-side conductors which are arranged so as to carry current in the same direction along the coil. At least some of the current conductors are arranged for selective independent electrical connection to a source of electrical energy.
Inventors
- 👤 Dieter Schluckebier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:50
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/101; H05B6/103; H05B6/104
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
143 words
A device for inductively heating flat metal objects comprising: at least one pair of induction coils which are spaced apart to present a heating gap therebetween through which an object to be heated is moved along a path of travel which extends laterally between said coils, each of said coils including an elongated iron core positioned to extend along said path of travel, each of said cores having a plurality of longitudinally extending grooves therein, the grooves in the iron core of at least one of said coils each having a plurality of segments disposed in a zig-zag or undulating configuration, said segments being disposed at respective angles not greater than 60° relative to said path of travel, said coils including a plurality of elongated, individually electrically connectable current conductors, each of said conductors being disposed within a respective groove to extend therealong.
Claim 2
Independent Claim
143 words
A device for inductively heating flat metal objects comprising: at least one pair of induction coils which are spaced apart to present a heating gap therebetween through which an object to be heated is moved along a path of travel which extends laterally between said coils, each of said coils including an elongated iron core positioned to extend along said path of travel, each of said cores having a plurality of longitudinally extending grooves therein, the grooves in the iron core of at least one of said coils each having a plurality of segments disposed in a zig-zag or undulating configuration, said segments being disposed at respective angles not greater than 60° relative to said path of travel, said coils including a plurality of elongated, individually electrically connectable current conductors, each of said conductors being disposed within a respective groove to extend therealong.
Claim 3
Dependent Claim
32 words
A device as set forth in claim 1, wherein each of said coils have several of said conductors arranged in side-by-side relationship for carrying current in a same direction along said core.
Claim 4
Dependent Claim
48 words
A device as set forth in claim 2, wherein said cores have spaced ends and said several of said conductors each has a first part which carries current toward one end of the core and a second part which carries current toward a second end of the core.
Claim 5
Dependent Claim
27 words
A device as set forth in claim 2, wherein said several of said conductors are arranged symmetrically relative to a longitudinal center line of a respective coil.
Claim 6
Dependent Claim
21 words
A device as set forth in claim 1, wherein each of said coils comprises a pair of longitudinally spaced coil segments.
Claim 7
Dependent Claim
24 words
A device as set forth in claim 5, wherein said coil segments are individually laterally movable toward and away from said path of travel.
Claim 8
Dependent Claim
17 words
A device as set forth in claim 1, wherein said induction coils have an adjustable pole width.
Claim 9
Dependent Claim
36 words
A device as set forth in claim 1, wherein is included a side-by-side pair of said conductors, said pair of conductors being directly electrically connected in a direction which is lateral to the path of travel.
Claim 10
Dependent Claim
43 words
A device as set forth in claim 1, wherein one of said conductors is connected to a first source of electricity having a first frequency and a second of said conductors is connected to a second source of electricity having a second frequency.
References Cited (Backward Citations)
GB593195A
Cited
US2722589A
Cited
US2754397A
Cited
DE1224345B
Cited
DE1158194B
Cited
US3424886A
Cited
US3444346A
Cited
US4195214A
Cited
US4313433A
Cited
EP0150793A2
Cited
US4587392A
Cited
US4694131A
Cited
FR2573947A1
Cited
US4788394A
Cited
EP0246660A2
Cited
US4778971A
Cited
US4891484A
Cited
US5025122A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-08-08 | 1998-02-07 | 1998-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-08 | 2002-02-07 | 2002-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-08 | 2006-02-07 | 2006-08-09 | $7700.00 | Window Closed / Lapsed |