Annular concentric-lay bead cord
AssigneesSumitomo (SEI) Steel Wire Corp., Sumitomo Electric Tochigi Co., Ltd.
InventorsHiroshi Sasabe, Hitoshi Wakahara, Kenichi Okamoto
Life of this patent
Estimating the term…
Abstract
The disclosed bead cord which is lightweight and inexpensive and high in formability includes an annular core and a wrap wire helically wrapped around the annular core, the annular core being made of a medium carbon steel or an alloy steel having a lower carbon content and containing specific elements in suitable amounts. The diameter dC of alular core satisfies 1.04≦dC/dS≦1.30 where dS is the diameter of the wrap wire. The wrap wire has a coil diameter DS which is 0.5 to 1.3 times diameter DC of an annular shape of the annular core. The annular core may be formed with a plating layer of an Al—Zn alloy or a thick plating layer of Zn, or the annular core may be made of stainless steel.
Claims14
An annular concentric-lay bead cord comprising an annular core and a wrap wire helically wrapped around said annular core in a single or a plurality of layers, said annular core being made of a medium carbon steel and having a diameter dC that satisfies the following relation with respect to the diameter dS of the wrap wire:
- 1.04≦dC/dS≦1.30
- said wrap wire having a coil diameter DS which is 0.5 to 1.3 times diameter DC of an annular shape of the annular core, the coil diameter DS of the wrap wire being a coil diameter of the wrap wire while the wrap wire is coiled on a wire supply reel.
An annular concentric-lay bead cord comprising an annular core and a wrap wire helically wrapped around said annular core in a single or a plurality of layers, said annular core being made of an alloy steel comprising 0.08 to 0.27 percent by weight of carbon, 0.30 to 2.00 percent by weight of silicon, 0.50 to 2.00 percent by weight of manganese, and 0.20 to 2.00 percent by weight of chromium, the balance being iron and impurities that may inevitably mix into the alloy, and having a diameter dC that satisfies the following relation with respect to the diameter dS of the wrap wire:
- 1.04≦dC/dS≦1.30
- said wrap wire having a coil diameter DS which is 0.5 to 1.3 times diameter DC of an annular shape of the annular core, the coil diameter DS of the wrap wire being a coil diameter of the wrap wire while the wrap wire is coiled on a wire supply reel.
An annular concentric-lay bead cord comprising an annular core and a wrap wire helically wrapped around said annular core in a single or a plurality of layers, said annular core being made of an alloy steel comprising 0.08 to 0.27 percent by weight of carbon, 0.30 to 2.00 percent by weight of silicon, 0.50 to 2.00 percent by weight of manganese, and 0.20 to 2.00 percent by weight of chromium, and further containing at least one of 0.001 to 0.10 percent by weight of aluminum, 0.001 to 0.10 percent by weight of titanium, 0.001 to 0.10 percent by weight of niobium, 0.001 to 0.10 percent by weight of vanadium, 0.0003 to 0.10 percent by weight of boron, and 0.001 to 0.10 percent by weight of magnesium, the balance being iron and impurities that may inevitably mix into the alloy, and having a diameter dC that satisfies the following relation with respect to the diameter dS of the wrap wire:
- 1.04≦dC/dS≦1.30
- said wrap wire having a coil diameter DS which is 0.5 to 1.3 times diameter DC of an annular shape of the annular core, the coil diameter DS of the wrap wire being a coil diameter of the wrap wire while the wrap wire is coiled on a wire supply reel.
An annular concentric-lay bead cord comprising an annular core and a wrap wire helically wrapped around said annular core in a single or a plurality of layers, said annular core being formed with a plating layer of an aluminum-zinc alloy,
- wherein said annular core is made of an alloy steel comprising 0.08 to 0.27 percent by weight of carbon, 0.30 to 2.00 percent by weight of silicon, 0.50 to 2.00 percent by weight of manganese, and 0.20 to 2.00 percent by weight of chromium, and further containing at least one of 0.01 to 1.00 percent by weight of molybdenum, 0.10 to 2.00 percent by weight of nickel, 0.10 to 2.00 percent by weight of cobalt, and 0.01 to 1.00 percent by weight of tungsten, and 0.001 to 0.10 percent by weight of at least one of aluminum, niobium, titanium and vanadium, the balance being iron and impurities that may inevitably mix into the alloy.
An annular concentric-lay bead cord comprising an annular core and a wrap wire helically wrapped around said annular core in a single or a plurality of layers, said annular core being formed with a plating layer of an aluminum-zinc alloy,
- wherein said annular core is made of an alloy steel comprising 0.08 to 0.27 percent by weight of carbon, 0.30 to 2.00 percent by weight of silicon, 0.50 to 2.00 percent by weight of manganese, and 0.20 to 2.00 percent by weight of chromium, the balance being iron and impurities that may inevitably mix into the alloy.
An annular concentric-lay bead cord comprising an annular core and a wrap wire helically wrapped around said annular core in a single or a plurality of layers, said annular core being formed with a plating layer of zinc,
- wherein said annular core is made of an alloy steel comprising 0.08 to 0.27 percent by weight of carbon, 0.30 to 2.00 percent by weight of silicon, 0.50 to 2.00 percent by weight of manganese, and 0.20 to 2.00 percent by weight of chromium, and further containing at least one of 0.01 to 1.00 percent by weight of molybdenum, 0.10 to 2.00 percent by weight of nickel, 0.10 to 2.00 percent by weight of cobalt, and 0.01 to 1.00 percent by weight of tungsten, and 0.001 to 0.10 percent by weight of at least one of aluminum, niobium, titanium and vanadium, the balance being iron and impurities that may inevitably mix into the alloy.
An annular concentric-lay bead cord comprising an annular core and a wrap wire helically wrapped around said annular core in a single or a plurality of layers, said annular core being formed with a plating layer of zinc,
- wherein said annular core is made of an alloy steel comprising 0.08 to 0.27 percent by weight of carbon, 0.30 to 2.00 percent by weight of silicon, 0.50 to 2.00 percent by weight of manganese, and 0.20 to 2.00 percent by weight of chromium, the balance being iron and impurities that may inevitably mix into the alloy.
Dependencies are inferred from the claim text.