Patent US3877033A successfully refreshed from Google Patents.
Patent US4252102A successfully refreshed from Google Patents.
US4252102A
Expired / Lapsed
US
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Cutting element for processing rocks, metal or the like
Assignee: Baker Hughes Oilfield Operations LLC
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Filing: 1979-04-19
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Granted: 1981-02-24
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Expires: 1999-04-19
Abstract
Abstract A cutting element for processing of rock, in particular, but also metal, comprising a support member of cemented carbide or the like hard material and a cutting member made of polycrystalline diamond or like superhard cutting material, said members together forming the cutting element, the cutting element being formed by a cutout of a blank comprising a core zone of the cutting material and an outer zone of the hard material surrounding said core zone in the form of a shell, at least at the periphery thereof. The cutting element typically forms a wedge-shaped section of the blank.
Inventors
- 👤 Cornelius Phaal
- 👤 Rainer Jurgens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:25
CPC Classifications
B; B23; B23B; B23B27/00; B23B27/14; B23B27/141; E; E21; E21B; E21B10/00; E21B10/46; E21B10/58; Y; Y10; Y10T; Y10T407/00; Y10T407/27
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
96 words
A cutting element for the processing of rock in particular, but also metal, comprising a support member of cemented carbide or the like hard material and a cutting member made of polycrystalline diamond or cubic boron nitride cutting material, said members together forming said cutting element, characterized in that the cutting element is formed by a wedge-shaped cutout of a blank comprising a core zone of the cutting material and an outer zone of the said hard support material completely surrounding said core zone in the form of a shell, at least at the periphery thereof.
Claim 2
Dependent Claim
96 words
A cutting element for the processing of rock in particular, but also metal, comprising a support member of cemented carbide or the like hard material and a cutting member made of polycrystalline diamond or cubic boron nitride cutting material, said members together forming said cutting element, characterized in that the cutting element is formed by a wedge-shaped cutout of a blank comprising a core zone of the cutting material and an outer zone of the said hard support material completely surrounding said core zone in the form of a shell, at least at the periphery thereof.
Claim 3
Dependent Claim
27 words
A cutting element according to claim 1, characterized in that at least three boundary lines of the cutting member angularly intersect each other to form cutting edges.
Claim 4
Dependent Claim
33 words
A cutting element according to claim 1, characterized in that the support member of the cutting element supports the entire bottom surface as well as the entire rear surface of the cutting member.
Claim 5
Dependent Claim
29 words
A cutting element according to claim 1, characterized in that the outer zone of the blank forms an annular body surrounding the core zone at the periphery thereof only.
Claim 6
Dependent Claim
25 words
A cutting element according to claim 1, characterized in that the outer zone of the blank forms a hollow cylinder closed at the bottom thereof.
Claim 7
Dependent Claim
34 words
a cutting element according to claim 1, characterized in that the outer zone of the blank is formed by a separate preformed body, and the core zone is sinter bonded to the preformed body.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-24 | 1984-08-25 | 1985-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-24 | 1988-08-25 | 1989-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-24 | 1992-08-25 | 1993-02-24 | $7700.00 | Window Closed / Lapsed |