US4219339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diamond and cubic boron nitride abrasive compacts and conglomerates
Assignee: Individual
•
Filing: 1978-02-28
•
Granted: 1980-08-26
•
Expires: 1998-02-28
Abstract
Abstract An abrasive body for machining a workpiece including an abrasive compact comprising a mass of abrasive particles such as diamond and cubic boron nitride, present in an amount of at least 70 percent by volume of the compact, bonded into a hard conglomerate; support means covering more than 50 percent of the surface of the compact and bonded to the compact; and the compact presenting a formation, salient in relation to the support means, capable of machining the workpiece. Preferred configurations for the body are those in which the compact is sandwiched between two supports and a cylinder of compact inside a supporting sleeve.
Inventors
- 👤 William I. Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:40
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/02; B24D3/20; B24D3/28; B23; B23B; B23B27/00; B23B27/14; B23B27/148
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
128 words
An abrasive body for abrading or machining a workpiece including an abrasive compact comprising a mass of diamond or cubic boron nitride abrasive particles, present in an amount of at least 70 percent by volume of the compact, bonded into a hard conglomerate; support means of high rigidity covering more than 50 percent of the surface of the compact and attached to the compact; the compact presenting a major surface on each of opposite sides thereof and to which the support means is attached, the support means extending over substantially the whole of the one major surface and over at least a part of the other major surface; and the compact presenting a formation salient in relation to the support means, capable of abrading or machining the workpiece.
Claim 2
Dependent Claim
128 words
An abrasive body for abrading or machining a workpiece including an abrasive compact comprising a mass of diamond or cubic boron nitride abrasive particles, present in an amount of at least 70 percent by volume of the compact, bonded into a hard conglomerate; support means of high rigidity covering more than 50 percent of the surface of the compact and attached to the compact; the compact presenting a major surface on each of opposite sides thereof and to which the support means is attached, the support means extending over substantially the whole of the one major surface and over at least a part of the other major surface; and the compact presenting a formation salient in relation to the support means, capable of abrading or machining the workpiece.
Claim 3
Dependent Claim
22 words
An abrasive body according to claim 1 wherein the support means covers at least 75 percent of the surface of the compact.
Claim 4
Dependent Claim
12 words
An abrasive body according to claim 1 wherein the compact is wedge-shaped.
Claim 5
Dependent Claim
13 words
An abrasive body according to claim 1 wherein the salient formation is chisel-shaped.
Claim 6
Dependent Claim
13 words
An abrasive body according to claim 3 wherein the salient formation is chisel-shaped.
Claim 7
Dependent Claim
42 words
An abrasive body according to claim 1 wherein the support means extends across substantially the whole of both major surfaces and is cut away on adjacent edges; and the salient formation is the surface of the compact located between the cut-away edges.
Claim 8
Dependent Claim
21 words
An abrasive body according to claim 1 wherein the mass of the support means is more than that of the compact.
Claim 9
Dependent Claim
23 words
An abrasive body according to claim 7 wherein the mass of the support means is 5 to 15 times that of the compact.
Claim 10
Dependent Claim
21 words
An abrasive body according to claim 6 wherein the mass of the support means is more than that of the compact.
Claim 11
Dependent Claim
23 words
An abrasive body according to claim 9 wherein the mass of the support means is 5 to 15 times that of the compact.
Claim 12
Dependent Claim
28 words
An abrasive body according to claim 1 wherein the compact is attached to the support means directly without the presence of an interposed metal or alloy bonding layer.
Claim 13
Dependent Claim
24 words
An abrasive body according to claim 1 wherein the compact is attached to the support means through a metal or metal alloy braze layer.
Claim 14
Dependent Claim
18 words
An abrasive body according to claim 12 wherein the braze layer is less than 0.5 mm in thickness.
Claim 15
Dependent Claim
18 words
An abrasive body according to claim 12 wherein the braze layer is 50 to 500 microns in thickness.
Claim 16
Dependent Claim
17 words
An abrasive body according to claim 1 wherein the abrasive compact is a cubic boron nitride compact.
Claim 17
Dependent Claim
22 words
An abrasive body according to claim 15 wherein the compact includes a matrix which comprises a catalyst for cubic boron nitride growth.
Claim 18
Dependent Claim
18 words
An abrasive body according to claim 16 wherein the catalyst is selected from aluminum and an aluminum alloy.
Claim 19
Dependent Claim
14 words
An abrasive body according to claim 1 wherein the compact is a diamond compact.
Claim 20
Dependent Claim
20 words
An abrasive body according to claim 18 wherein the compact includes a matrix which comprises a solvent for diamond growth.
Claim 21
Dependent Claim
12 words
An abrasive body according to claim 19 wherein the solvent is cobalt.
Claim 22
Dependent Claim
16 words
An abrasive body according to claim 1 wherein the support means is made of cemented carbide.
Claim 23
Dependent Claim
16 words
An abrasive body according to claim 6 wherein the support means is made of cemented carbide.
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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) | 1983-08-26 | 1984-02-25 | 1984-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-26 | 1988-02-25 | 1988-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-26 | 1992-02-25 | 1992-08-26 | $7700.00 | Window Closed / Lapsed |