US3892912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical conduit containing electrical conductors
Assignee: Frankische Isolierrohr and Metallwaren Werke Gehrueder Kirchner
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Filing: 1973-12-13
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Granted: 1975-07-01
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Expires: 1993-12-13
Abstract
Abstract A flexible tube of electrically insulating synthetic plastic material is corrugated and accommodates loosely a core which extends axially of the tube and which is composed of two or more electrical conductors, each of which is electrically insulated from the other. A method of making the electrical conduit containing electrical conductors consists of continuously extruding a flexible tube formed of electrically insulating synthetic plastic material, and concurrently introducing into the flexible tube a loosely accommodated core which houses therein at least two electrical wire conductors which are electrically insulated from one another. Means for continuously corrugating the flexible tube and means for continuously cooling the extruded tube are also provided.
Inventors
- 👤 Edgar Hauck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:09
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/18; H01B7/184; B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/304; H01B13/00; H01B13/06; H01B13/14; H01B7/04; B29C48/03; B29C48/05; B29C48/06; B29C48/09; B29C48/10; B29C48/13; B29K; B29K2105/00; B29K2105/06; B29K2105/20; B29L; B29L2031/00; B29L2031/34; B29L2031/3462
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
As an article of manufacture, a cable assembly adapted to be pre-shaped prior to installation in various structures, particularly in the walls of buildings or the like, comprising, in combination, a pronouncedly flexible tube of electrically insulating synthetic plastic material, said tube being corrugated; and at least one plastically deformable shape-holding core loosely accommodated in and fractionally filling a part of said tube and extending axially thereof, said core being composed of at least two electrical conductors, at least one of said conductors being a wire which is substantially plastically deformable during bending, and each of said conductors being provided with a respective jacket of electrically insulating material, and a common cover of electrically insulating synthetic plastically deformable shape-holding material frictionally engaging said jackets and combining said conductors into a bundle, whereby said cable assembly may be pre-shaped by bending said shape-holding core to a preDetermined form in which said flexible tube is substantially retained by the presence of said core.
Claim 2
Dependent Claim
161 words
As an article of manufacture, a cable assembly adapted to be pre-shaped prior to installation in various structures, particularly in the walls of buildings or the like, comprising, in combination, a pronouncedly flexible tube of electrically insulating synthetic plastic material, said tube being corrugated; and at least one plastically deformable shape-holding core loosely accommodated in and fractionally filling a part of said tube and extending axially thereof, said core being composed of at least two electrical conductors, at least one of said conductors being a wire which is substantially plastically deformable during bending, and each of said conductors being provided with a respective jacket of electrically insulating material, and a common cover of electrically insulating synthetic plastically deformable shape-holding material frictionally engaging said jackets and combining said conductors into a bundle, whereby said cable assembly may be pre-shaped by bending said shape-holding core to a preDetermined form in which said flexible tube is substantially retained by the presence of said core.
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) | 1978-06-30 | 1978-12-30 | 1979-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-30 | 1982-12-30 | 1983-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-30 | 1986-12-30 | 1987-07-01 | $7700.00 | Window Closed / Lapsed |