Patent US5087154A successfully refreshed from Google Patents.
US5111032A
Expired / Lapsed
US
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Method of making an electrical device comprising a conductive polymer
Assignee: Tyco International Ltd
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Filing: 1989-03-13
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Granted: 1992-05-05
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Expires: 2009-03-13
Abstract
Abstract An electrical device, particularly a self-regulating strip heater, has improved thermal efficiency, good mechanical properties, and acceptable resistance to water penetration when an outer insulating layer is applied in a way that it penetrates the interstices of a braid surrounding the heater. Appropriate penetration may be achieved by pressure-extruding the outer jacket over the braid.
Inventors
- 👤 Neville S. Batliwalla
- 👤 Amitkumar N. Dharia
- 👤 Randall M. Feldman
- 👤 Ashok K. Mehan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:17
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/54; H05B3/56; H05B3/10; H05B3/12; H05B3/14; H05B3/146
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
72 words
An electrical device which comprises (1) a resistive element which comprises first and second elongate wire electrodes which are embedded in a continuous strip of conductive polymer; (2) an insulating jacket; (3) an auxiliary member which contains interstices and which is separated from the resistive element by the insulating jacket; and (4) blocking material which fills interstices in the auxiliary member, wherein the blocking material has been applied by a pressure extrusion.
Claim 2
Dependent Claim
72 words
An electrical device which comprises (1) a resistive element which comprises first and second elongate wire electrodes which are embedded in a continuous strip of conductive polymer; (2) an insulating jacket; (3) an auxiliary member which contains interstices and which is separated from the resistive element by the insulating jacket; and (4) blocking material which fills interstices in the auxiliary member, wherein the blocking material has been applied by a pressure extrusion.
Claim 3
Dependent Claim
14 words
A device according to claim 1 wherein the blocking material comprises a polymeric compound.
Claim 4
Dependent Claim
13 words
A device according to claim 1 wherein the blocking material is electrically insulating.
Claim 5
Dependent Claim
13 words
A device according to claim 1 wherein the blocking material is electrically conductive.
Claim 6
Dependent Claim
13 words
A device according to claim 1 wherein the auxiliary member is a braid.
Claim 7
Dependent Claim
14 words
A device according to claim 5 wherein the braid is a metallic grounding braid.
Claim 8
Dependent Claim
21 words
A device according to claim 1 wherein the blocking material fills at least 20% of the interstices of the auxiliary member.
Claim 9
Dependent Claim
21 words
A device according to claim 7 wherein the blocking material fills at least 30% of the interstices of the auxiliary member.
Claim 10
Dependent Claim
18 words
A device according to claim 1 wherein the blocking material comprises the same material as the insulating jacket.
Claim 11
Dependent Claim
32 words
A device according to claim 1 wherein the blocking material comprises a thermally conductive particulate filler selected from the group consisting of ZnO, Al 2 O 3 , graphite and carbon black.
Claim 12
Dependent Claim
15 words
A device according to claim 1 wherein the resistive element is a resistive heating element.
Claim 13
Dependent Claim
25 words
A device according to claim 1 wherein the interstices of the auxiliary member comprise at least 30% of the surface area of the auxiliary member.
Claim 14
Dependent Claim
11 words
A device according to claim 1 which is surrounded by concrete.
Claim 15
Dependent Claim
44 words
A device according to claim 1 wherein the thermal properties of the device comprising the blocking material are such that the device ha a thermal efficiency which is at least 1.05 times that of an identical heater which does not comprise the blocking material.
Claim 16
Dependent Claim
105 words
A flexible elongate electrical heater which comprises (1) an elongate resistive heating element which comprises first and second elongate wire electrodes which are embedded in a continuous strip of conductive polymer; (2) a first elongate jacket which is composed of an insulating polymeric material, and which surrounds the heating element; (3) a metallic braid which surrounds and contacts the first insulating jacket; and (4) a second elongate jacket which is composed of a polymeric material, which surrounds and contacts the metallic braid, and a part of which passes through apertures in the metallic braid to fill at least 20% of the apertures and to contact.
Claim 17
Dependent Claim
105 words
A flexible elongate electrical heater which comprises (1) an elongate resistive heating element which comprises first and second elongate wire electrodes which are embedded in a continuous strip of conductive polymer; (2) a first elongate jacket which is composed of an insulating polymeric material, and which surrounds the heating element; (3) a metallic braid which surrounds and contacts the first insulating jacket; and (4) a second elongate jacket which is composed of a polymeric material, which surrounds and contacts the metallic braid, and a part of which passes through apertures in the metallic braid to fill at least 20% of the apertures and to contact.
Claim 18
Independent Claim
82 words
A method of making an electrical device which comprises (A) providing a device which comprises (1) a resistive element which comprises first and second elongate wire electrodes which are embedded in a continuous strip of conductive polymer, (2) an insulating jacket, and (3) an auxiliary member which contains interstices and which is separated from the resistive element by the insulating jacket; and, (B) filling interstices in the auxiliary member with a blocking material which is applied by means of a pressure extrusion.
Claim 19
Independent Claim
82 words
A method of making an electrical device which comprises (A) providing a device which comprises (1) a resistive element which comprises first and second elongate wire electrodes which are embedded in a continuous strip of conductive polymer, (2) an insulating jacket, and (3) an auxiliary member which contains interstices and which is separated from the resistive element by the insulating jacket; and, (B) filling interstices in the auxiliary member with a blocking material which is applied by means of a pressure extrusion.
Claim 20
Dependent Claim
14 words
A method according to claim 16 wherein the blocking material comprises a polymeric compound.
Claim 21
Dependent Claim
20 words
A method according to claim 16 wherein the interstices are filled by extruding the blocking material over the auxiliary member.
Claim 22
Dependent Claim
20 words
A method according to claim 16 wherein the blocking material passes through the interstices and thus contacts the insulating jacket.
Claim 23
Dependent Claim
79 words
An electrical device which comprises (1) a resistive element which comprises first and second elongate wire electrodes which are embedded in a continuous strip of conductive polymer; (2) an insulating jacket; (3) an auxiliary member which contains interstices and which is separated from the resistive element by the insulating jacket; and (4) blocking material which fills at least 20% of the interstices in the auxiliary member, wherein the blocking material has been applied in the form of a liquid.
Claim 24
Dependent Claim
79 words
An electrical device which comprises (1) a resistive element which comprises first and second elongate wire electrodes which are embedded in a continuous strip of conductive polymer; (2) an insulating jacket; (3) an auxiliary member which contains interstices and which is separated from the resistive element by the insulating jacket; and (4) blocking material which fills at least 20% of the interstices in the auxiliary member, wherein the blocking material has been applied in the form of a liquid.
Claim 25
Dependent Claim
63 words
An electrical device which comprises (1) a resistive element which comprises first and second elongate wire electrodes which are embedded in a continuous strip of conductive polymer; (2) an insulating jacket; (3) an auxiliary member which contains interstices and which is separated from the resistive element by the insulating jacket; and (4) blocking material which completely fills the interstices in the auxiliary member.
Claim 26
Dependent Claim
63 words
An electrical device which comprises (1) a resistive element which comprises first and second elongate wire electrodes which are embedded in a continuous strip of conductive polymer; (2) an insulating jacket; (3) an auxiliary member which contains interstices and which is separated from the resistive element by the insulating jacket; and (4) blocking material which completely fills the interstices in the auxiliary member.
Claim 27
Dependent Claim
86 words
An electrical device which comprises (1) a resistive element which comprises first and second elongate wire electrodes which are embedded in a continuous strip of conductive polymer; (2) an insulating jacket; (3) an auxiliary member which contains interstices and which is separated from the resistive element by the insulating jacket; and (4) blocking material which fills interstices in the auxiliary member, wherein the device has a thermal efficiency which is at least 1.05 times that of an identical heater which does not comprise the blocking material.
Claim 28
Dependent Claim
86 words
An electrical device which comprises (1) a resistive element which comprises first and second elongate wire electrodes which are embedded in a continuous strip of conductive polymer; (2) an insulating jacket; (3) an auxiliary member which contains interstices and which is separated from the resistive element by the insulating jacket; and (4) blocking material which fills interstices in the auxiliary member, wherein the device has a thermal efficiency which is at least 1.05 times that of an identical heater which does not comprise the blocking material.
Claim 29
Independent Claim
82 words
A method of making an electrical device which comprises (A) providing a device which comprises (1) a resistive element which comprises first and second elongate wire electrodes which are embedded in a continuous strip of conductive polymer, (2) an insulating jacket, and (3) an auxiliary member which contains interstices and which is separated from the resistive element by the insulating jacket; and (B) filling interstices in the auxiliary member with a blocking material which is in the form of a liquid material.
Claim 30
Independent Claim
82 words
A method of making an electrical device which comprises (A) providing a device which comprises (1) a resistive element which comprises first and second elongate wire electrodes which are embedded in a continuous strip of conductive polymer, (2) an insulating jacket, and (3) an auxiliary member which contains interstices and which is separated from the resistive element by the insulating jacket; and (B) filling interstices in the auxiliary member with a blocking material which is in the form of a liquid material.
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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) | 1995-05-05 | 1995-11-04 | 1996-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-05 | 1999-11-04 | 2000-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-05 | 2003-11-04 | 2004-05-05 | $7700.00 | Window Closed / Lapsed |