Zirconia sintered body and use thereof
US-9919971-B2 · Mar 20, 2018 · US
Knife
US11338457B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11338457-B2 |
| Application number | US-201716473627-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 26, 2017 |
| Priority date | Dec 26, 2016 |
| Publication date | May 24, 2022 |
| Grant date | May 24, 2022 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A knife includes a blade having a first side face and a second side face. The blade includes zirconia as a main component, and includes a cutting region including at least a ridge portion between the first side face and the second side face. When a portion including the cutting region in the first side face is referred to as a first cutting face, and a portion including the cutting region in the second side face is referred to as a second cutting face, the proportion of cubic crystals of zirconia in the first cutting face is larger than the proportion of cubic crystals of zirconia in the second cutting face.
First claim
Opening claim text (preview).
What is claimed is: 1. A knife comprising: a blade having: a first portion comprising a first side face, the first side face comprising a first cutting face, and a second portion comprising a second side face, the second side face comprising a second cutting face; wherein the blade comprises zirconia as a main component, and has a cutting region, the cutting region comprising: at least a ridge portion between the first side face and the second side face, the first cutting face in the cutting region, and the second cutting face in the cutting region; and the first portion comprises columnar crystal grains of the zirconia extending in a direction perpendicular to the first cutting face and the second portion comprises granular crystal grains of the zirconia. 2. The knife according to claim 1 , wherein a proportion of cubic crystals of zirconia in the first side face is greater than a proportion of cubic crystals of zirconia in the second side face. 3. The knife according to claim 1 , wherein the first cutting face has a higher hardness than a hardness of the second cutting face. 4. The knife according to claim 1 , wherein the first side face has a higher hardness than a hardness of the second side face.
Assignees
Inventors
Classifications
Yttrium oxide or oxide-forming salts thereof · CPC title
- B26B9/00Primary
Blades for hand knives · CPC title
characterised by the material treated · CPC title
Products with a concentration gradient · CPC title
Oxides · CPC title
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Frequently asked questions
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- What does patent US11338457B2 cover?
- A knife includes a blade having a first side face and a second side face. The blade includes zirconia as a main component, and includes a cutting region including at least a ridge portion between the first side face and the second side face. When a portion including the cutting region in the first side face is referred to as a first cutting face, and a portion including the cutting region in th…
- Who is the assignee on this patent?
- Kyocera Corp
- What technology area does this patent fall under?
- Primary CPC classification B26B9/00. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue May 24 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).