US5605199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elements faced with super hard material
Assignee: ReedHycalog UK Ltd
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Filing: 1995-06-20
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Granted: 1997-02-25
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Expires: 2015-06-20
Abstract
Abstract A preform element includes a facing table of super hard material having a from face, an outer peripheral surface, and a rear surface bonded to a substrate which is less hard than the super hard material. The facing table comprising a peripheral region surrounding an inner region, the peripheral region having an inner surface which is inclined at an angle of greater than 90° to the rear surface of the facing table so as to face in a direction having a component rearwardly away from the facing table as well as inwardly towards said inner region. The inner region of the facing table may be formed with projections extending into the substrate.
Inventors
- 👤 Alex Newton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:33
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/56; E21B10/567; E21B10/573; E21B10/5735
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
150 words
A preform element including a facing table of superhard material having a front face, an outer peripheral surface, and a rear surface bonded to a substrate which is less hard than the superhard material, the facing table comprising a peripheral region surrounding an inner region disposed inwardly of said peripheral surface, the peripheral region having an inner surface which is generally inclined at an angle of greater than 90° to the rear surface of the facing table so as to face in a direction having a component rearwardly away from the facing table as well as inwardly towards said inner region thereof, and wherein the peripheral edge of said inner surface which is furthest from the facing table is spaced inwardly of said outer peripheral surface, a further annular surface extending outwardly from the rearmost peripheral edge of said inner surface to the outer peripheral surface of the facing table.
Claim 2
Dependent Claim
150 words
A preform element including a facing table of superhard material having a front face, an outer peripheral surface, and a rear surface bonded to a substrate which is less hard than the superhard material, the facing table comprising a peripheral region surrounding an inner region disposed inwardly of said peripheral surface, the peripheral region having an inner surface which is generally inclined at an angle of greater than 90° to the rear surface of the facing table so as to face in a direction having a component rearwardly away from the facing table as well as inwardly towards said inner region thereof, and wherein the peripheral edge of said inner surface which is furthest from the facing table is spaced inwardly of said outer peripheral surface, a further annular surface extending outwardly from the rearmost peripheral edge of said inner surface to the outer peripheral surface of the facing table.
Claim 3
Dependent Claim
31 words
A preform element according to claim 1 wherein the inner surface of the peripheral region extends at an angle of more than 100° to the rear surface of the facing table.
Claim 4
Dependent Claim
31 words
A preform element according to claim 1, wherein the inner surface of the peripheral region extends at an angle of more than 120° to the rear surface of the facing table.
Claim 5
Dependent Claim
30 words
A preform element according to claim 3, wherein the inner surface of the peripheral region extends at an angle of substantially 135° to the rear surface of the facing table.
Claim 6
Dependent Claim
18 words
A preform element according to claim 1, wherein said inner surface of the peripheral region is substantially smooth.
Claim 7
Dependent Claim
17 words
A preform element according to claim 1, wherein said inner surface of the peripheral region is configured.
Claim 8
Dependent Claim
22 words
A preform element according to claim 6, wherein said inner surface of the peripheral region is formed with peripheral grooves and/or ridges.
Claim 9
Dependent Claim
31 words
A preform element according to claim 1, wherein the inner surface of the peripheral region is substantially straight as viewed in cross section, so that its overall configuration is generally frusto-conical.
Claim 10
Dependent Claim
23 words
A preform element according to claim 1, wherein said further annular surface extends generally parallel to the front surface of the facing table.
Claim 11
Dependent Claim
31 words
A preform element according to claim 1, wherein there is provided an angular junction between the inner peripheral edge of said inner surface and the rear surface of the facing table.
Claim 12
Dependent Claim
30 words
A preform element according to claim 1, wherein the junction between the inner peripheral edge of said inner surface and the rear surface of the facing table is smoothly curved.
Claim 13
Dependent Claim
36 words
A preform element according to claim 1, wherein said projections comprise a plurality of spaced generally parallel ribs extending across the inner region of the facing table, the extremities of said ribs meeting the peripheral region.
Claim 14
Dependent Claim
20 words
A preform element according to claim 1, wherein a transition layer is provided between the facing table and the substrate.
Claim 15
Dependent Claim
21 words
A preform element according to claim 13, wherein the transition layer comprises polycrystalline diamond particles embedded in a tungsten carbide matrix.
Claim 16
Dependent Claim
123 words
A preform element including a facing table of superhard material having a front face, an outer peripheral surface, and a rear surface bonded to a substrate which is less hard than the superhard material, the facing table comprising a peripheral region surrounding an inner region disposed inwardly of said peripheral surface, the peripheral region having an inner surface which is generally inclined at an angle of greater than 90° to the rear surface of the facing table so as to face in a direction having a component rearwardly away from the facing table as well as inwardly towards said inner region thereof, and the rear surface of the facing table being formed with a plurality of integral projections which extend into the substrate.
Claim 17
Dependent Claim
123 words
A preform element including a facing table of superhard material having a front face, an outer peripheral surface, and a rear surface bonded to a substrate which is less hard than the superhard material, the facing table comprising a peripheral region surrounding an inner region disposed inwardly of said peripheral surface, the peripheral region having an inner surface which is generally inclined at an angle of greater than 90° to the rear surface of the facing table so as to face in a direction having a component rearwardly away from the facing table as well as inwardly towards said inner region thereof, and the rear surface of the facing table being formed with a plurality of integral projections which extend into the substrate.
Claim 18
Dependent Claim
39 words
A preform element according to claim 15, wherein said projections comprise a plurality of ribs which extend inwardly from said peripheral region of the facing table I and at least partly across said inner region of the facing table.
Claim 19
Dependent Claim
15 words
A preform element according to claim 16, wherein said ribs extend in substantially radial directions.
References Cited (Backward Citations)
EP0389800A1
Cited
US5120327A
Cited
EP0601840A1
Cited
US5469927A
Cited
US5486137A
Cited
EP0638383A1
Cited
GB2283772A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-02-25 | 2000-08-26 | 2001-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-02-25 | 2004-08-26 | 2005-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-02-25 | 2008-08-26 | 2009-02-25 | $7700.00 | Window Closed / Lapsed |