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US 2012/0222315 A1Published application
Cutting Instrument and Coating
OwnerLarry Buchtmann, Gary Piainventors
Life of this patent
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Abstract
A new and improved cutting instrument is provided having an enhanced coating. The coating includes titanium, chromium, nitrogen and carbon elements and provides increased wear resistance. The coating can be applied to a variety of metal and non-metallic substrates, which include scissors and knife blades.
Claims23
A cutting instrument comprising:
- a cutting blade comprising steel;
- and
- a coating disposed directly on the cutting blade, the coating comprising at least a first layer comprising an amorphous material including carbon, titanium, chromium, and nitrogen, wherein at least some of the chromium is in the form of chromium carbonitride and titanium chromium carbonitride and at least some of the titanium is in the form of titanium carbonitride, and further wherein the coating comprises the elements chromium and titanium in a weight ratio in the range of 3:1 to 1:3.
A complementary blade cutting instrument comprising:
- a first and second cutting blade comprising steel;
- and
- a coating disposed directly on the cutting blades, the coating comprising at least a first layer that includes an amorphous material including carbon, nitrogen, titanium, and chromium, wherein at least some of the chromium is in the form of chromium carbonitride and titanium chromium carbonitride and at least some of the titanium is in the form of titanium carbonitride, the coating having a thickness in a range of 0.05 microns to about 1.0 microns, and further wherein the coating comprises the elements chromium and titanium in a weight ratio in the range of 3:1 to 1:3.
A method comprising:
- obtaining a cutting instrument having a cutting blade comprising steel,
- placing the cutting instrument in a position suitable for coating the cutting blade;
- cleaning the cutting blade;
- and
- depositing at least a first layer of a coating comprising an amorphous material including chromium, titanium, carbon and nitrogen directly on the cutting blade,
- wherein at least some of the chromium is in the form chromium carbonitride and titanium chromium carbonitride and at least some of the titanium is in the form of titanium carbonitride, and
- wherein the coating comprises the elements chromium and titanium in a weight ratio in the range of 3:1 to 1:3.
4 more elements
A cutting instrument comprising:
- a cutting blade comprising steel;
- and
- a reactive magnetron sputtered coating disposed directly on the cutting blade, the coating having a thickness of 0.1 to 0.5 microns and comprising at least a first layer comprising an amorphous material including titanium, chromium, and nitrogen, the titanium and chromium being present in a weight ratio in the range of 3:1 to 1:3.
Dependencies are inferred from the claim text.