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US5054246A
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Abrasive compacts
Assignee: Individual
•
Filing: 1989-09-07
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Granted: 1991-10-08
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Expires: 2009-09-07
Abstract
Abstract An abrasive compact is provided which has a plurality of recesses which may take the form of grooves or holes formed in a major surface thereof. The recesses contain no solid material and serve as crack arrester formations.
Inventors
- 👤 Cornelius Phaal
- 👤 Nicholas Mastrantonis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:33
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/56; E21B10/567; E21B10/5673; B; B24; B24D; B24D18/00; B24D99/00; B28; B28D; B28D1/00; B28D1/18; B28D1/186; B28D1/188; Y; Y10; Y10S; Y10S76/00; Y10S76/12; Y10T; Y10T407/00; Y10T407/26
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
55 words
An abrasive compact which has major surfaces on each of opposite sides thereof and a plurality of recesses formed in one of the major surfaces thereon which provides a cutting means, the recesses being less than 0.5 mm in width and containing no solid material, wherein the cutting means are a cutting edge or point.
Claim 2
Dependent Claim
55 words
An abrasive compact which has major surfaces on each of opposite sides thereof and a plurality of recesses formed in one of the major surfaces thereon which provides a cutting means, the recesses being less than 0.5 mm in width and containing no solid material, wherein the cutting means are a cutting edge or point.
Claim 3
Dependent Claim
27 words
An abrasive compact according to claim 1 in which a plurality of spaced recesses are formed in the surface of the compact which provides the cutting means.
Claim 4
Dependent Claim
12 words
An abrasive compact according to claim 2 wherein the recesses are holes.
Claim 5
Dependent Claim
30 words
An abrasive compact according to claim 3 wherein the holes are provided in a random arrangement covering at least a part of the major surface in which they are formed.
Claim 6
Dependent Claim
33 words
An abrasive compact according to claim 3 wherein the holes are provided in the form of a regular pattern covering at least a part of the major surface in which they are formed.
Claim 7
Dependent Claim
33 words
An abrasive compact according to claim 5 wherein the holes are arranged in a series of parallel rows, the holes in one row being staggered relative to the holes in an adjacent row.
Claim 8
Dependent Claim
33 words
An abrasive compact according to claim 5 wherein the holes are arranged in a series of parallel rows, the holes in one row being in register with the holes in an adjacent row.
Claim 9
Dependent Claim
12 words
An abrasive compact according to claim 2 wherein the recesses are grooves.
Claim 10
Dependent Claim
33 words
An abrasive compact according to claim 8 wherein the grooves are provided in a grid-like pattern which covers at least a part of the surface of the compact which provides the cutting means.
Claim 11
Dependent Claim
29 words
An abrasive compact according to claim 1 wherein the recess is a single groove, at least a portion of which is located close to the cutting edge or point.
Claim 12
Dependent Claim
13 words
An abrasive compact according to claim 1 which is a diamond abrasive compact.
Claim 13
Dependent Claim
28 words
An abrasive compact according to claim 1 which is provided with a cemented carbide support bonded to the major surface which does not have said recess formed therein.
Claim 14
Dependent Claim
32 words
An abrasive compact according to claim 1 wherein at least one recess extends into the compact to a depth of about one-half to less than one-half the distance between the major surfaces.
Claim 15
Dependent Claim
58 words
A mehtod of making an abrasive compact according to claim 1 includes the steps of providing an abrasive compact having major surfaces on each of opposite sides thereof, one of the major surfaces providing a cutting edge or point, and forming at least one recess in the surface of the compact which provides the cutting edge or point.
Claim 16
Dependent Claim
23 words
A method according to claim 14 wherein the at least one recess is formed in the compact by laser cutting or spark erosion.
References Cited (Backward Citations)
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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) | 1994-10-07 | 1995-04-08 | 1995-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-07 | 1999-04-08 | 1999-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-07 | 2003-04-08 | 2003-10-08 | $7700.00 | Window Closed / Lapsed |