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US 8,769,833 B2Granted
Utility knife blade
AssigneeStanley Black & Decker, Inc.
InventorPeter Geoffrey Culf
Life of this patent
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Abstract
A utility knife blade includes a portion made of a first material; and an elongated portion made of a second material, the second material being harder than the first material and coated on the first material by melting a powder of the second material on the first material, the elongated portion forming the tip of the blade, wherein the second material includes tungsten carbide particles embedded in a soft binder, and wherein the size of at least 90% of the tungsten carbide particles is lower than about 5 micrometers.
Claims21
A utility knife blade comprising:
- a portion made of a first material;
- and
- an elongated portion made of a second material, the second material being harder than the first material and coated on the first material by melting a powder of the second material on the first material, the elongated portion forming the tip of the blade,
- wherein the second material includes tungsten carbide particles embedded in a soft binder,
- wherein the size of at least 90% of the tungsten carbide particles is lower than about 5 micrometers, and
- wherein said portion made of the first material includes a region, in contact with the second material, that has been hardened during deposition of the second material on the first material so that said hardened region has a hardness lower than a hardness of the second material and greater than a hardness of the first material.
3 more elements
Dependencies are inferred from the claim text.