US4328392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welded-turn helical electrical conduit with electrically conductive grounding element
Assignee: Flexible Technologies Inc
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Filing: 1980-05-15
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Granted: 1982-05-04
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Expires: 2000-05-15
Abstract
Abstract An electrical conduit formed of helically fabricated grounding and reinforcing elements, including a foil channel having overlapped turns welded to one another and to a supporting helix.
Inventors
- 👤 Thomas A. Kutnyak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:05
CPC Classifications
H; H02; H02G; H02G3/00; H02G3/02; H02G3/04; H02G3/0462; H02G3/0468; H02G3/06; H02G3/0616; H02G3/0625; H02G3/0666
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
79 words
An electrical conduit comprising: (a) a self-supporting metal wire helix; (b) a metal foil channel applied helically about the helix and spanning the turns thereof, the edge portions of the channel being overlapped over the turns of the helix; (c) weld means affixing the overlapped edge portions of the channel to one another and to the helix; (d) an electrically conductive extended grounding element applied along the central portion of the channel; and (e) an outer circumferentially complete jacket.
Claim 2
Dependent Claim
79 words
An electrical conduit comprising: (a) a self-supporting metal wire helix; (b) a metal foil channel applied helically about the helix and spanning the turns thereof, the edge portions of the channel being overlapped over the turns of the helix; (c) weld means affixing the overlapped edge portions of the channel to one another and to the helix; (d) an electrically conductive extended grounding element applied along the central portion of the channel; and (e) an outer circumferentially complete jacket.
Claim 3
Dependent Claim
14 words
An electrical conduit according to claim 1 wherein the helix is a round wire.
Claim 4
Dependent Claim
16 words
An electrical conduit according to claim 1 wherein the central portion of the channel is flat.
Claim 5
Dependent Claim
17 words
An electrical conduit according to claim 1 wherein the central portion of the channel is convoluted outwardly.
Claim 6
Dependent Claim
19 words
An electrical conduit according to claim 1 wherein the electrically conductive grounding element is a high carbon fiber strip.
Claim 7
Dependent Claim
20 words
An electrical conduit according to claim 5 wherein a tape is applied over the grounding strip and inside the jacket.
Claim 8
Dependent Claim
14 words
An electrical conduit according to claim 6 wherein the tape is of metal foil.
Claim 9
Dependent Claim
22 words
An electrical conduit according to claim 7 wherein the metal foil tape has pressure sensitive adhesive on at least one side thereof.
Claim 10
Dependent Claim
89 words
An electrical conduit comprising (a) a self-supporting metal round wire helix having spaced turns; (b) a pre-formed metal foil channel applied helically about the wire helix and spanning the turns thereof the edge portions of the channel being overlapped over the turns of the wire helix; (c) weld means affixing the overlapped edge portions of the channel to one another and to the wire helix; (d) an electrically conductive extended grounding element applied along the central portion of the channel; and (e) an outer circumferentially complete extruded plastic jacket.
Claim 11
Dependent Claim
89 words
An electrical conduit comprising (a) a self-supporting metal round wire helix having spaced turns; (b) a pre-formed metal foil channel applied helically about the wire helix and spanning the turns thereof the edge portions of the channel being overlapped over the turns of the wire helix; (c) weld means affixing the overlapped edge portions of the channel to one another and to the wire helix; (d) an electrically conductive extended grounding element applied along the central portion of the channel; and (e) an outer circumferentially complete extruded plastic jacket.
Claim 12
Dependent Claim
16 words
An electrical conduit according to claim 9 wherein the central portion of the channel is flat.
Claim 13
Dependent Claim
17 words
An electrical conduit according to claim 9 wherein the central portion of the channel is convoluted outwardly.
Claim 14
Dependent Claim
37 words
An electrical conduit according to claim 9 wherein the grounding element is a high carbon fiber strip and a metal foil tape with pressure sensitive adhesive on at least one side thereof is applied about the strip.
Claim 15
Dependent Claim
13 words
An electrical conduit according to claim 9 wherein the channel is of aluminum.
Claim 16
Dependent Claim
15 words
A electrical conduit according to claim 9 wherein the outer jacket is of polyvinyl chloride.
References Cited (Backward Citations)
US3006664A
Cited
US3239400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-03 | 1985-11-02 | 1986-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-03 | 1989-11-02 | 1990-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-03 | 1993-11-02 | 1994-05-04 | $7700.00 | Window Closed / Lapsed |