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US3823253A Expired / Lapsed US ⏱️ 0.0 years remaining

Stretchable cable

Assignee: Cooper Industries LLC
•
Filing: 1970-07-10
•
Granted: 1974-07-09
•
Expires: 1990-07-10
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Abstract

Abstract An elongated, uncoiled stretchable and retractable cable is formed with the capability of stretching several times its relaxed length and returning to its relaxed length without being damaged by having inner and outer conductors helically wrapped with opposite lays or serves which may move relative to each other without becoming interlocked as in a braided construction. More specifically, the inner one of the conductors is helically wrapped in one direction about and along a central, elastomeric core and the outer conductor is helically wrapped along and circumferentially about the inner conductor but in an opposite direction. In a similar manner, an outer conductor shield for a coaxial cable may be formed of conductors oppositely laid and helically wrapped about an elastomeric layer separating the shield conductors from the interior conductors. Good resistance to ambient and environmental conditions as well as good stretchability and retractability are provided by using thermoplastic, elastomeric polyurethane as the material for the inner central core, the insulating layer and an outer protective sheath.

Inventors

  • 👤 J Walters
  • 👤 R Cole

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 08:15
CPC Classifications
H; H01; H01B; H01B11/00; H01B11/18; H01B11/1808; H01B11/1821; H01B7/00; H01B7/06; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249922

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 189 words
An elongated, uncoiled stretchable and retractable coaxial cable capable of stretching at least three times its relaxed length and contracting to its relaxed length without substantial damage thereto comprising an inner, elongated, central, stretchable and contractable core of elastomeric polyurethane material, a plurality of elongated first electrical, flexible conductors generally helically wrapped around and along said core in a first direction, a plurality of elongated second electrical conductors generally helically wrapped along and disposed circumferentially outward of the outer surface of said first conductor throughout substantially the entire length thereof, said second electrical conductors being helically wrapped in a direction opposite to the helical winding of said first conductors, an insulating layer of stretchable and contractable, elastomeric polyurethane material surrounding said first and second conductors, a plurality of first shield conductors generally helically wrapped in one direction around and along said insulating layer, a plurality of second shield conductors generally helically wrapped around and along said first shield conductors in a direction opposite to said one direction, and an outer sheath of stretchable and contractable elastomeric, polyurethane material surrounding the assembly of said core, insulating layer, and said conductors.
Claim 2
Dependent Claim 189 words
An elongated, uncoiled stretchable and retractable coaxial cable capable of stretching at least three times its relaxed length and contracting to its relaxed length without substantial damage thereto comprising an inner, elongated, central, stretchable and contractable core of elastomeric polyurethane material, a plurality of elongated first electrical, flexible conductors generally helically wrapped around and along said core in a first direction, a plurality of elongated second electrical conductors generally helically wrapped along and disposed circumferentially outward of the outer surface of said first conductor throughout substantially the entire length thereof, said second electrical conductors being helically wrapped in a direction opposite to the helical winding of said first conductors, an insulating layer of stretchable and contractable, elastomeric polyurethane material surrounding said first and second conductors, a plurality of first shield conductors generally helically wrapped in one direction around and along said insulating layer, a plurality of second shield conductors generally helically wrapped around and along said first shield conductors in a direction opposite to said one direction, and an outer sheath of stretchable and contractable elastomeric, polyurethane material surrounding the assembly of said core, insulating layer, and said conductors.
Claim 3
Dependent Claim 39 words
A coaxial cable in accordance with claim 1 in which said first conductors cover substantially the entire peripheral surface of said core and in which said first shield conductors cover substantially the entire peripheral surface of said insulating layer.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-07-08 1978-01-07 1978-07-09 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-07-08 1982-01-07 1982-07-09 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-07-08 1986-01-07 1986-07-09 $7700.00 Window Closed / Lapsed

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