Disk brakes
AssigneeNippon Oil Co., Ltd.
InventorsTakefumi Kohno, Masakazu Hiro, Yoshio Soda, Mitsuhiro Ishii
Life of this patent
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Abstract
A disk pad type brake comprises a rotor disk provided with a carbon-carbon composite material (a) as a friction member, and at least one pad provided with a carbon-carbon composite material (b) as a friction member, wherein the difference in thermal conductivity between the materials (a) and (b) is 30 to 450 W/m.multidot.K in the radial direction; and a multi-disk type brake comprises at least one rotor disk provided with a carbon-carbon composite material (c) as a friction member, and at least one stator disk provided with a carbon-carbon composite material (d) as a friction member, wherein the difference in thermal conductivity between the materials (c) and (d) is 30 to 450 W/m.multidot.K in the radial direction.
Claims26
A disk pad brake comprising a rotor disk provided with a carbon-carbon composite material (a) as a friction member, and at least one pad provided with a carbon-carbon composite material (b) as a friction member;
- said materials (a) and (b) being each composed of carbon fibers and a carbonaceous matrix;
- and the difference in thermal conductivity between said materials (a) and (b) being in a range of 30 to 450 W/m-K in a radial direction of each of said materials,
- wherein:
- said material (a) is prepared by impregnating the carbon fibers with a thermoplastic organic precursor and firing so impregnated carbon fibers;
- said material (b) is prepared by either 1) impregnating the carbon fibers with a thermoplastic organic precursor, firing so impregnated carbon fibers and then depositing pyrolytic carbon on so fired composite, or 2) depositing pyrolytic carbon on the carbon fibers, impregnating so obtained composite with a thermoplastic organic precursor and then firing so impregnated composite;
- and
- said carbon fibers used in at least either of said materials (a) and (b) are at least one member selected from the group consisting of pitch-based carbon fibers and precursors thereof.
A multi-disk brake comprising at least one rotor disk provided with a carbon-carbon composite material (c) as a friction member, and at least one stator disk provided with a carbon-carbon composite material (d) as a friction member;
- said materials (c) and (d) being each composed of carbon fibers and a carbonaceous matrix;
- and the difference in thermal conductivity between said materials (c) and (d) being in a range of 30 to 450 W/m-K in a radial direction of each of said materials,
- wherein:
- said material (c) is prepared by impregnating the carbon fibers with a thermoplastic organic precursor and firing so impregnated carbon fibers;
- said material (d) is prepared by either 1) impregnating the carbon fibers with a thermoplastic organic precursor, firing so impregnated carbon fibers and then depositing pyrolytic carbon on so fired composite, or 2) depositing pyrolytic carbon on the carbon fibers, impregnating so obtained composite with a thermoplastic organic precursor and then firing so impregnated composite;
- and
- said carbon fibers used in at least either of said materials (c) and (d) are at least one member selected from the group consisting of pitch-based carbon fibers and precursors thereof.
Dependencies are inferred from the claim text.