Patent US5141367A successfully refreshed from Google Patents.
US5141367A
Expired / Lapsed
US
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Ceramic cutting tool with chip control
Assignee: Kennametal Inc
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Filing: 1990-12-18
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Granted: 1992-08-25
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Expires: 2010-12-18
Abstract
Abstract A ceramic cutting insert for high speed machining of materials is provided having an integral chip control surface thereon.
Inventors
- 👤 Craig W. Beeghly
- 👤 Deepak P. Ahuja
- 👤 Pankaj K. Mehrotra
- 👤 Kenneth L. Niebauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:01
CPC Classifications
B; B23; B23B; B23B27/00; B23B27/14; B23B27/141; B23B27/143; B23B2200/00; B23B2200/32; B23B2200/321; Y; Y10; Y10T; Y10T407/00; Y10T407/23; Y10T407/235; Y10T407/24; Y10T407/245; Y10T407/27; Y10T82/00; Y10T82/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
84 words
A ceramic cutting insert for high speed machining comprising: a cutting edge, a rake face with a chip control groove surface, a flank face, and wherein said cutting edge is formed at the juncture of said flank face and said rake face; said ceramic insert comprising 0.5 to less than 5 volume percent silicon carbide whiskers, 5 to 15 volume percent zirconia, a residue of a magnesia addition added in an amount of zero to 3 volume percent, all dispersed in an alumina matrix.
Claim 2
Dependent Claim
84 words
A ceramic cutting insert for high speed machining comprising: a cutting edge, a rake face with a chip control groove surface, a flank face, and wherein said cutting edge is formed at the juncture of said flank face and said rake face; said ceramic insert comprising 0.5 to less than 5 volume percent silicon carbide whiskers, 5 to 15 volume percent zirconia, a residue of a magnesia addition added in an amount of zero to 3 volume percent, all dispersed in an alumina matrix.
Claim 3
Dependent Claim
15 words
The insert according to claim 1 wherein said flank face is in as molded condition.
Claim 4
Dependent Claim
18 words
The insert according to claim 1 wherein said chip control groove surface is in an as molded condition.
Claim 5
Dependent Claim
18 words
The insert according to claim 2 wherein said chip control groove surface is in an as molded condition.
Claim 6
Dependent Claim
36 words
The insert according to claim 1 wherein said silicon carbide whiskers are present at a level of 0.5 to 2.5 volume percent and said zirconia is present at a level of 7.5 to 12.5 volume percent.
Claim 7
Dependent Claim
22 words
The insert according to claim 1 wherein said magnesia addition is added in an mount of about 0.04 to 1 volume percent.
Claim 8
Dependent Claim
23 words
The insert according to claim 5 wherein said magnesia addition is added in an amount of about 0.04 to 1 to volume percent.
Claim 9
Dependent Claim
34 words
The insert according to claim 1 further comprising means extending through the rake face and the thickness of the ceramic insert for receiving a locking means for holding said ceramic insert on a toolholder.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-08-25 | 1996-02-24 | 1996-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-25 | 2000-02-24 | 2000-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-25 | 2004-02-24 | 2004-08-25 | $7700.00 | Window Closed / Lapsed |