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US 7,740,698 B2Granted
Non-asbestos friction material
AssigneeAkebono Brake Industry Co., Ltd.
InventorsTakuya Kitami, Hiroshi Isobe
Life of this patent
Estimating the term…
Abstract
A non-asbestos friction material not containing a heavy metal and a heavy metallic compound as the blending ingredients of the friction material is provided with graphite and coke in total from 5 to 25 vol % in volume of friction material. A volume ratio of the graphite/coke is preferably from 2/1 to 7/1. An average particle size of the coke is preferably from 150 to 400 μm.
Claims4
A non-asbestos friction material comprising:
- a fibrous material;
- a friction modifier;
- and
- a binder;
- wherein the friction modifier comprises graphite and coke in total from 5 to 25 vol % in the friction material,
- the volume ratio of the graphite/coke is from 2/1 to 7/1,
- wherein an average particle size of the coke is from 150 to 400 μm (micro meter), and
- wherein the friction material does not contain any of iron, copper, zinc, lead, manganese and chromium and any compound of iron, copper, zinc, lead, manganese and chromium.
5 more elements
A non-asbestos friction material comprising:
- a fibrous material;
- a friction modifier;
- and
- a binder;
- wherein the friction modifier comprises graphite and coke in total from 5 to 25 vol % in the friction material,
- an average particle size of the coke is from 150 to 400 μm (micro meter), and
- wherein the friction material does not contain any of iron, copper, zinc, lead, manganese and chromium and any compound of iron, copper, zinc, lead, manganese and chromium.
4 more elements
Dependencies are inferred from the claim text.