Armoured cable and its manufacture
OwnerMarc Fitzner, Paul Mcmilleninventors
Life of this patent
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Abstract
A product having a metal strip and a central longitudinal axis. The strip has two or more strip parts, each having a common radius of curvature defining a helix having an angle being offset from one another in the direction of the axis. A cross section of the strip parts causes them to be interlocked together throughout their lengths to define a flexible metal tube. The outside diameter of the tube is between ⅜″ and 1⅜″ and the helix angle of each strip part is between eight and thirty degrees.
Claims6
An improved product having a metal strip and a central longitudinal axis, the strip being defined by two or more separate strip parts, the two or more strip parts each:
- having a common radius of curvature;
- defining a helix having an angle;
- being offset from one another in the direction of the axis;
- and
- having cross sections such that the strip parts are interlocked together throughout their lengths and such that the strip is interlocked with itself throughout its length to define a flexible metal tube,
- the improvement comprising:
- an outside diameter of the tube being of a range between ⅜″ and 1⅜″;
- and
- the helix angle of each strip part being of a range between 8 and 30 degrees.
Dependencies are inferred from the claim text.