Multi-layer steel cable for tire carcass

Details Multi-layer steel cable for tire carcass Multi-layer steel cable for tire carcass

2005-01-04

2005-01-04

Johnstone, Adrienne C. (Department: 1733)

Resilient tires and wheels

Tires, resilient

Pneumatic tire or inner tube

C057S213000, C057S902000, C152S451000, C428S295400

Reexamination Certificate

active

06837289

ABSTRACT:
A multi-layer cable having an unsaturated outer layer, usable as a reinforcing element for a tire carcass reinforcement, comprising a core of diameter d0surrounded by an intermediate layer (C1) of four or five wires (M=4 or 5) of diameter d1wound together in a helix at a pitch p1, this layer C1itself being surrounded by an outer layer (C2) of N wires of diameter d2wound together in a helix at a pitch p2, N being less by 1 to 3 than the maximum number Nmaxof wires which can be wound in one layer about the layer C1,this cable having the following characteristics (d0, d1, d2, p1and p2in mm):in-line-formulae description="In-line Formulae" end="lead"?0.08<d0<0.28;  (i)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?0.15<d1<0.28;  (ii)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?0.12<d2<0.25;  (iii)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?forM=4: 0.40 <(d0/d1)<0.80;  (iv)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?forM=5: 0.70<(d0/d1)<1.10;in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?4.8π(d0+d1)<p1<p2<5.6π(d0+2d1+d2);  (v)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?the wires of layers C1and C2are wound in the same direction of twist.  (vi)in-line-formulae description="In-line Formulae" end="tail"?The invention furthermore relates to the articles or semi-finished products made of plastics material and/or rubber which are reinforced by such a multi-layer cable, in particular to tires intended for industrial vehicles, more particularly truck tires and their carcass reinforcement plies.

REFERENCES:
patent: 6418994 (2002-07-01), Arnaud
patent: 6748989 (2004-06-01), Cordonnier et al.
patent: 0648891 (1995-04-01), None
patent: 0675223 (1995-10-01), None
patent: 0744490 (1996-11-01), None
patent: 0719889 (1998-07-01), None
patent: WO 9841682 (1998-09-01), None
Rsch Discl 3343 [343, Nov '92.

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