US4543555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coil assembly for hot melt induction heater apparatus
Assignee: Boeing Co
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Filing: 1983-09-12
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Granted: 1985-09-24
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Expires: 2003-09-12
Abstract
Abstract An induction heating coil having fluoroplastic coated polyimide tape wrapped windings for providing a bonded, solid monolithic structure. The induction heating coil includes a cooling heatsink of predetermined size and shape fused in relationship to a plurality of consecutive turns of current-carrying coil windings. A plurality of fluoroplastic coated polyimide sheets are fused to the coil body between the coil body and a fluoroplastic face sheet forming the outer wear surface of the induction heater coil, thereby providing a non-stick surface for release of hot melt adhesives.
Inventors
- 👤 Arthur W. McDermott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:38
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/36; H01; H01F; H01F41/00; H01F41/02; H01F41/04; H01F41/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
133 words
A coil assembly for use in induction heating apparatus comprising a plurality of windings of a flat shaped electrical conductor, said electrical conductor wrapped with a polyimide tape, said polyimide tape having two major side surfaces, each of said side surfaces having a coating of fluoroplastic material, and, including a fluoroplastic face sheet supported by a major surface of said coil assembly and providing a non-stick surface for release of hot melt adhesive material; said coil assembly further including a heat sink disposed on a major surface of said coil assembly opposite said major surface supporting said fluoroplastic face sheet; and, wherein the stack of elements comprising face sheet (12), a plurality of coated polyimide sheets (20) and a coil body (10), when fixtured (FIG. 8), provides a clamping pressure to insure fusing.
Claim 2
Dependent Claim
133 words
A coil assembly for use in induction heating apparatus comprising a plurality of windings of a flat shaped electrical conductor, said electrical conductor wrapped with a polyimide tape, said polyimide tape having two major side surfaces, each of said side surfaces having a coating of fluoroplastic material, and, including a fluoroplastic face sheet supported by a major surface of said coil assembly and providing a non-stick surface for release of hot melt adhesive material; said coil assembly further including a heat sink disposed on a major surface of said coil assembly opposite said major surface supporting said fluoroplastic face sheet; and, wherein the stack of elements comprising face sheet (12), a plurality of coated polyimide sheets (20) and a coil body (10), when fixtured (FIG. 8), provides a clamping pressure to insure fusing.
Claim 3
Dependent Claim
115 words
A coil assembly for use in induction heating apparatus comprising a plurality of windings of a flat shaped electrical conductor, said electrical conductor wrapped with polyimide tape, said polyimide tape having two major side surfaces, each of said side surfaces having a coating of fluoroplastic material, and, including a fluoroplastic face sheet supported by a major surface of said coil assembly and providing a non-stick surface for release of hot melt adhesive material; said coil assembly further including a heat sink disposed on a major surface of said coil assembly opposite said major surface supporting said fluoroplastic face sheet; and, wherein said fluoroplastic face sheet has a thickness of 32 mils ±2 to 3 mils.
Claim 4
Dependent Claim
115 words
A coil assembly for use in induction heating apparatus comprising a plurality of windings of a flat shaped electrical conductor, said electrical conductor wrapped with polyimide tape, said polyimide tape having two major side surfaces, each of said side surfaces having a coating of fluoroplastic material, and, including a fluoroplastic face sheet supported by a major surface of said coil assembly and providing a non-stick surface for release of hot melt adhesive material; said coil assembly further including a heat sink disposed on a major surface of said coil assembly opposite said major surface supporting said fluoroplastic face sheet; and, wherein said fluoroplastic face sheet has a thickness of 32 mils ±2 to 3 mils.
Claim 5
Dependent Claim
31 words
The invention according to claim 2 further including a plurality of fluoroplastic coated polyimide sheets fused to and disposed between said face sheet and said major surface of said heating coil.
Claim 6
Dependent Claim
111 words
A coil assembly for use in induction heating apparatus comprising a plurality of windings of a flat shaped electrical conductor, said electrical conductor wrapped with a polyimide tape, said polyimide tape having two major side surfaces, each of said side surfaces having a coating of fluoroplastic material, and, including a fluoroplastic face sheet supported by a major surface of said coil assembly and providing a non-stick surface for release of hot melt adhesive material; said coil assembly further including a heat sink disposed on a major surface of said coil assembly opposite said major surface supporting said fluoroplastic face sheet; and, wherein said heat sink comprises a copper slotted washer-like member.
Claim 7
Dependent Claim
111 words
A coil assembly for use in induction heating apparatus comprising a plurality of windings of a flat shaped electrical conductor, said electrical conductor wrapped with a polyimide tape, said polyimide tape having two major side surfaces, each of said side surfaces having a coating of fluoroplastic material, and, including a fluoroplastic face sheet supported by a major surface of said coil assembly and providing a non-stick surface for release of hot melt adhesive material; said coil assembly further including a heat sink disposed on a major surface of said coil assembly opposite said major surface supporting said fluoroplastic face sheet; and, wherein said heat sink comprises a copper slotted washer-like member.
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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) | 1988-09-23 | 1989-03-25 | 1989-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-23 | 1993-03-25 | 1993-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-23 | 1997-03-25 | 1997-09-24 | $7700.00 | Window Closed / Lapsed |