US3725629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slab heating device
Assignee: PARK O IND Inc
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Filing: 1971-07-16
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Granted: 1973-04-03
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Expires: 1991-07-16
Abstract
Abstract An induction heating unit is provided which is comprised of a plurality of substantially U-shaped or O-shaped tubular conductor sections having opposite ends interconnected one with a first tubular bus bar component and the other with a second tubular bus bar component parallel to the first. The conductor sections are disposed in spaced apart planes which are parallel to one another and perpendicular to the axis of the coil unit. The bus bar components are connected to opposite sides of a source of alternating current, whereby the several conductor sections are connected in electrical parallel. One of the bus bar components serves as an inlet header for coolant fluid for the heating unit and the other of the bus bar components serves as a discharge header for coolant fluid.
Inventors
- 👤 R Vickers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:26
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/36; H05B6/42; H05B6/40
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
139 words
Apparatus for inductively heating a metal workpiece having a longest dimension with respect to said apparatus comprising, a plurality of individual, generally U-shaped conductors of tubular conductor material disposed in parallel spaced-apart planes and having opposite ends connected one to a first bus of tubular conductor material and the other to a second bus of tubular conductor material, means connecting said first and second busses to opposite sides of a source of alternating current, whereby said individual conductors are connected in electrical parallel, said U-shaped conductors having side legs spaced apart to receive a workpiece therebetween, said side legs of said conductors extending in the direction of said longest dimension of a workpiece disposed therebetween, and said planes of said conductors extending generally parallel to the direction of said longest dimension of a workpiece disposed between said side legs.
Claim 2
Dependent Claim
139 words
Apparatus for inductively heating a metal workpiece having a longest dimension with respect to said apparatus comprising, a plurality of individual, generally U-shaped conductors of tubular conductor material disposed in parallel spaced-apart planes and having opposite ends connected one to a first bus of tubular conductor material and the other to a second bus of tubular conductor material, means connecting said first and second busses to opposite sides of a source of alternating current, whereby said individual conductors are connected in electrical parallel, said U-shaped conductors having side legs spaced apart to receive a workpiece therebetween, said side legs of said conductors extending in the direction of said longest dimension of a workpiece disposed therebetween, and said planes of said conductors extending generally parallel to the direction of said longest dimension of a workpiece disposed between said side legs.
Claim 3
Dependent Claim
69 words
The apparatus of claim 1, wherein said side legs of each said conductor are parallel and spaced apart a first distance in the corresponding plane thereof and are of a length greater than said longest dimension of a workpiece disposed therebetween, and said first and second busses are spaced apart a distance less than said first distance, whereby said conductors suBstantially surround a workpiece disposed between said side legs.
Claim 4
Dependent Claim
62 words
The apparatus of claim 2, wherein said conductors and busses are intercommunicating tubular components, means connecting one of said first and second busses to a source of cooling fluid for said one bus to define inlet header means for coolant for said conductors, and the other of said first and second busses defining header means for discharging cooling fluid from said conductors.
Claim 5
Dependent Claim
34 words
The apparatus of claim 3, wherein the side legs of said conductors are of uniform length and are longer than the length of the apparatus as measured perpendicular to said planes of said conductors.
Claim 6
Dependent Claim
62 words
The apparatus of claim 1 wherein said conductors and busses are intercommunicating tubular components, means connecting one of said first and second busses to a source of cooling fluid for said one bus to define inlet header means for coolant for said conductors, and the other of said first and second busses defining header means for discharging cooling fluid from said conductors.
Claim 7
Dependent Claim
34 words
The apparatus of claim 1 wherein the side legs of said conductors are of uniform length and are longer than the length of the apparatus as measured perpendicular to said planes of said conductors.
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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |