Patent US4345368A successfully refreshed from Google Patents.
US4345368A
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Parallel-type heating cable and method of making same
Assignee: Thermon Manufacturing Co
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Filing: 1980-09-18
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Granted: 1982-08-24
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Expires: 2000-09-18
Abstract
Abstract A method and apparatus for parallel-type heating cables. In accordance with the present invention a heating core element is formed by connecting two essentially parallel bus wires with a plurality of electrically conductive splices to a centrally disposed resistive element and around which heating core element a protective sheath is formed. The present invention permits this heating core element to be formed by splicing the spaced apart, essentially parallel wire elements followed by a single extrusion application of a protective sheath.
Inventors
- 👤 David C. Goss
- 👤 Daniel R. Springs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:23
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/54; H05B3/56; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49083
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
120 words
A continuous method of manufacturing parallel-type heating cable, comprising the steps of: (a) continuously arranging a first and second bus wire into a spaced apart essentially parallel relationship; (b) continuously supplying a resistive heating element between the essentially parallel to said bus wires; (c) continuously forming a heating core from said bus wires and resistive heating element by deforming a plurality of electrically conductive splices about said first bus wire and resistive heating element and said second bus wire and resistive heating element to establish an alternating series of mechanical-electrical connections between said first bus wire and resistive heating element and said second bus wire and resistive heating element; and (d) continuously covering said heating element; with a protective covering.
Claim 2
Dependent Claim
120 words
A continuous method of manufacturing parallel-type heating cable, comprising the steps of: (a) continuously arranging a first and second bus wire into a spaced apart essentially parallel relationship; (b) continuously supplying a resistive heating element between the essentially parallel to said bus wires; (c) continuously forming a heating core from said bus wires and resistive heating element by deforming a plurality of electrically conductive splices about said first bus wire and resistive heating element and said second bus wire and resistive heating element to establish an alternating series of mechanical-electrical connections between said first bus wire and resistive heating element and said second bus wire and resistive heating element; and (d) continuously covering said heating element; with a protective covering.
Claim 3
Dependent Claim
19 words
The method of claim 1, wherein: said covering is formed by extruding a thermoplastic resin about said heating core.
Claim 4
Dependent Claim
28 words
The method of claim 1, wherein: said electrically conductive splices have deformable end surfaces which are deformed about said bus wires and resistive heating element by mechanical crimping.
Claim 5
Dependent Claim
16 words
The method of claim 3, wherein: said deformable end surfaces of said splices have cleated projections.
Claim 6
Dependent Claim
22 words
The method of claim 1, wherein: said resistive heating element comprises a resistive heating wire helically wound about an electrically nonconductive core.
Claim 7
Dependent Claim
93 words
A continuous method of manufacturing parallel-type heating cable, comprising the steps of: (a) continuously arranging a first and second bus wire into a spaced apart essentially parallel relationship; (b) continuously forming a heating core from said bus wires by deforming a plurality of electrical splices, comprising a high resistance conductive material that generates joule heat upon passage therethrough of electric current, about said first and second bus wire to establish a series of mechanical-electrical connections between said first and second bus wire; and (c) continuously covering said heating core with a protective covering.
Claim 8
Dependent Claim
93 words
A continuous method of manufacturing parallel-type heating cable, comprising the steps of: (a) continuously arranging a first and second bus wire into a spaced apart essentially parallel relationship; (b) continuously forming a heating core from said bus wires by deforming a plurality of electrical splices, comprising a high resistance conductive material that generates joule heat upon passage therethrough of electric current, about said first and second bus wire to establish a series of mechanical-electrical connections between said first and second bus wire; and (c) continuously covering said heating core with a protective covering.
Claim 9
Dependent Claim
19 words
The method of claim 6, wherein: said covering is formed by extruding a thermoplastic resin about said heating core.
Claim 10
Dependent Claim
27 words
The method of claim 6, wherein: said electrically splices have deformable end surfaces which are deformed about said bus wires and resistive heating element by mechanical crimping.
Claim 11
Dependent Claim
16 words
The method of claim 6, wherein: said deformable end surfaces of said splices have cleated projections.
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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) | 1985-08-23 | 1986-02-22 | 1986-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-23 | 1990-02-22 | 1990-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-23 | 1994-02-22 | 1994-08-24 | $7700.00 | Window Closed / Lapsed |