US5486137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive tool insert
Assignee: Diamond Innovations Inc
•
Filing: 1994-07-06
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Granted: 1996-01-23
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Expires: 2014-07-06
Abstract
Abstract Disclosed is an abrasive tool insert having an abrasive particle layer having an upper surface, an outer periphery, and a lower surface integrally formed on a substrate which defines an interface therebetween. The abrasive particle layer outer periphery forms a cutting plane. The thickness of the abrasive particle layer at its outer periphery cutting plane decreases radially inwardly. Thus, the interface can have a sawtooth shape cross-sectional profile, at least one slot extending from said abrasive particle layer outer periphery radially inwardly, or other configuration based on the precepts of the present invention. Also, the angle of the outwardly sloping profile can be matched to the anticipated angle of the wear plane which will develop as the PDC wears in use.
Inventors
- 👤 Gary M. Flood
- 👤 David M. Johnson
- 👤 Henry S. Marek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:20
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/56; E21B10/567; E21B10/573; E21B10/5735; B; B23; B23B; B23B27/00; B23B27/14; B23B27/141; B23B27/145; B23B27/146; B23B2222/00; B23B2222/28; B23B2226/00; B23B2226/12; B23B2226/125; B23B2226/31; B23B2226/315; Y; Y10; Y10T; Y10T407/00; Y10T407/27
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
126 words
An abrasive tool insert comprising: a substrate having an end face, a continuous abrasive layer having a center, a periphery forming a cutting surface, an upper surface and a lower surface integrally formed on said end face of said substrate and defining an interface there between, said lower surface of said abrasive layer having at least one protrusion extending from said interface into the substrate and from said center to said periphery, said end face of said substrate having at least one slot for receiving said protrusion of said abrasive layer, wherein said interface includes at least one region extending from said cutting surface such that said abrasive layer is thicker at said cutting surface than at regions immediately and radially interior to said cutting surface.
Claim 2
Dependent Claim
126 words
An abrasive tool insert comprising: a substrate having an end face, a continuous abrasive layer having a center, a periphery forming a cutting surface, an upper surface and a lower surface integrally formed on said end face of said substrate and defining an interface there between, said lower surface of said abrasive layer having at least one protrusion extending from said interface into the substrate and from said center to said periphery, said end face of said substrate having at least one slot for receiving said protrusion of said abrasive layer, wherein said interface includes at least one region extending from said cutting surface such that said abrasive layer is thicker at said cutting surface than at regions immediately and radially interior to said cutting surface.
Claim 3
Dependent Claim
35 words
The tool insert as defined in claim 1, wherein said abrasive layer further comprises a top flat surface, wherein said sloped region is sloped between about 10 to about 50 degrees to said upper surface.
Claim 4
Dependent Claim
24 words
The tool insert as defined in claim 2, wherein said sloped region is sloped between 25 to about 45 degrees to said upper surface.
Claim 5
Dependent Claim
14 words
The tool insert as defined in claim 1, wherein said substrate comprises cemented carbide.
Claim 6
Dependent Claim
15 words
The tool insert as defined in claim 1, wherein said abrasive layer comprises polycrystalline diamond.
References Cited (Backward Citations)
FR2355990A1
Cited
US4109737A
Cited
SU911004A1
Cited
US4525179A
Cited
US4629373A
Cited
US4784023A
Cited
US4872520A
Cited
US4972637A
Cited
EP0322214B1
Cited
US5007207A
Cited
US5025874A
Cited
US4858707A
Cited
US4997049A
Cited
US5037451A
Cited
US5054246A
Cited
EP0369852A1
Cited
SU1657594A1
Cited
US4954139A
Cited
US4984642A
Cited
US5011515A
Cited
US5011515B1
Cited
US5217081A
Cited
JPH04152003A
Cited
US5120327A
Cited
US5172778A
Cited
US5351772A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-01-22 | 1999-07-24 | 2000-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-01-22 | 2003-07-24 | 2004-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-01-22 | 2007-07-24 | 2008-01-23 | $7700.00 | Window Closed / Lapsed |