Patent US5232469A successfully refreshed from Google Patents.
US5232469A
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Multi-layer metal coated diamond abrasives with an electrolessly deposited metal layer
Assignee: Diamond Innovations Inc
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Filing: 1992-03-25
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Granted: 1993-08-03
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Expires: 2012-03-25
Abstract
Abstract Multi-layer coated diamond abrasive particles having improved wear performance in abrasive tools are provided, wherein the coating comprises a single homogenous, carbide forming metal primary layer, preferably of chromium, and at least one non-carbide forming secondary layer applied by electroless deposition, preferably comprised of nickel/phosphorus or cobalt/phosphorus.
Inventors
- 👤 Roger McEachron
- 👤 Edward J. Connors
- 👤 David E. Slutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:54
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/02; B24D3/04; B24D3/06; B22; B22F; B22F1/00; B22F1/18; C; C09; C09K; C09K3/00; C09K3/14; C09K3/1436; C09K3/1445; C22; C22C; C22C26/00
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
50 words
An abrasive particle suitable for use in sintered metal bonded abrasive tools comprising a diamond abrasive having a multi-layer coating consisting essentially of one homogeneous carbide forming metal primary layer chemically bonded to the surface of the diamond abrasive and at least one non-carbide forming metal secondary layer deposited electrolessly.
Claim 2
Dependent Claim
50 words
An abrasive particle suitable for use in sintered metal bonded abrasive tools comprising a diamond abrasive having a multi-layer coating consisting essentially of one homogeneous carbide forming metal primary layer chemically bonded to the surface of the diamond abrasive and at least one non-carbide forming metal secondary layer deposited electrolessly.
Claim 3
Dependent Claim
19 words
An abrasive particle as in claim 1, wherein said non-carbide forming metal secondary layer comprises cobalt/phosphorus, iron/phosphorus, or nickel/phosphorus.
Claim 4
Dependent Claim
34 words
An abrasive particle as in claim 2, wherein the amount of said non-carbide forming metal secondary layer ranges from 10 to 50 wt %, based on the weight of the uncoated diamond abrasive particle.
Claim 5
Dependent Claim
17 words
An abrasive particle as in claim 2, having two different non-carbide forming metal secondary layers deposited electrolessly.
Claim 6
Dependent Claim
25 words
An abrasive particle as in claim 1, wherein the diamond abrasive particles have an average particle size in the range of 1 to 1500 μm.
Claim 7
Dependent Claim
51 words
An abrasive particle suitable for use in a sintered metal bonded abrasive tool comprising a diamond abrasive having a multi-layer coating consisting essentially of one homogeneous carbide forming metal primary layer deposited by chemical vapor deposition, or packed salt deposition and a non-carbide forming metal secondary layer deposited by electroless deposition.
Claim 8
Dependent Claim
51 words
An abrasive particle suitable for use in a sintered metal bonded abrasive tool comprising a diamond abrasive having a multi-layer coating consisting essentially of one homogeneous carbide forming metal primary layer deposited by chemical vapor deposition, or packed salt deposition and a non-carbide forming metal secondary layer deposited by electroless deposition.
Claim 9
Dependent Claim
18 words
An abrasive particle as in claim 6, wherein said non-carbide forming metal secondary layer comprises cobalt/phosphorus or nickel/phosphorus.
Claim 10
Dependent Claim
21 words
An abrasive particle as in claim 6, wherein the carbide forming metal primary layer has a thickness ranging from 0.1-10 μm.
Claim 11
Dependent Claim
49 words
An abrasive particle suitable for use in sintered metal bonded abrasive tools comprising a diamond abrasive having a multi-layer coating consisting essentially of one homogeneous chromium metal primary layer chemically bonded to the surface of the diamond abrasive and at least one non-carbide forming metal secondary layer deposited electrolessly.
Claim 12
Dependent Claim
49 words
An abrasive particle suitable for use in sintered metal bonded abrasive tools comprising a diamond abrasive having a multi-layer coating consisting essentially of one homogeneous chromium metal primary layer chemically bonded to the surface of the diamond abrasive and at least one non-carbide forming metal secondary layer deposited electrolessly.
Claim 13
Dependent Claim
34 words
An abrasive particle as in claim 9, wherein the amount of said non-carbide forming metal secondary layer ranges from 10 to 50 wt %, based on the weight of the uncoated diamond abrasive particle.
Claim 14
Dependent Claim
23 words
An abrasive particle as in claim 9, wherein the non-carbide forming metal secondary layer is comprised of one layer of nickel/phosphorus or cobalt/phosphorus.
Claim 15
Dependent Claim
17 words
An abrasive particle as in claim 9, having two different non-carbide forming metal secondary layers deposited electrolessly.
Claim 16
Dependent Claim
25 words
An abrasive particle as in claim 9, wherein the diamond abrasive particles have an average particle size in the range of 1 to 1500 μm.
Claim 17
Dependent Claim
50 words
An abrasive particle suitable for use in a sintered metal bonded abrasive tool comprising a diamond abrasive having a multi-layer coating consisting essentially of one homogeneous chromium metal primary layer deposited by chemical vapor deposition, or packed salt deposition and a non-carbide forming metal secondary layer deposited by electroless deposition.
Claim 18
Dependent Claim
50 words
An abrasive particle suitable for use in a sintered metal bonded abrasive tool comprising a diamond abrasive having a multi-layer coating consisting essentially of one homogeneous chromium metal primary layer deposited by chemical vapor deposition, or packed salt deposition and a non-carbide forming metal secondary layer deposited by electroless deposition.
Claim 19
Dependent Claim
18 words
An abrasive particle as in claim 14, wherein said non-carbide forming metal secondary layer comprises cobalt/phosphorus or nickel/phosphorus.
Claim 20
Dependent Claim
20 words
An abrasive particle as in claim 14, wherein the chromium metal primary layer has a thickness ranging from 0.1-10 μm.
Claim 21
Dependent Claim
60 words
A process for the preparation of coated diamond abrasive particles for use in sintered metal bonded abrasive tools, said process comprising applying one homogeneous carbide forming metal primary layer to the surface of said diamond abrasive particles by chemical vapor deposition or packed salt deposition and applying at least one secondary layer of a non-carbide forming metal by electroless deposition.
Claim 22
Dependent Claim
60 words
A process for the preparation of coated diamond abrasive particles for use in sintered metal bonded abrasive tools, said process comprising applying one homogeneous carbide forming metal primary layer to the surface of said diamond abrasive particles by chemical vapor deposition or packed salt deposition and applying at least one secondary layer of a non-carbide forming metal by electroless deposition.
Claim 23
Dependent Claim
32 words
A process according to claim 17, wherein the homogenous carbide forming metal primary layer consists essentially of chromium and is chemically bonded to the diamond abrasive particle without a separate sintering step.
Claim 24
Dependent Claim
50 words
A process according to claim 17, wherein the carbide forming metal primary layer is applied at a thickness ranging from 0.1 to 10 μm, and the secondary layer is applied in an amount in the range of 10-50 wt %, based on the weight of the uncoated diamond abrasive particles.
Claim 25
Dependent Claim
16 words
A process according to claim 17, wherein two different secondary layers are applied by electroless deposition.
Claim 26
Dependent Claim
23 words
A method according to claim 17, wherein the secondary layer is deposited from at least one of nickel hypophosphite or cobalt hypophosphite solution.
Claim 27
Dependent Claim
51 words
A process according to claim 17, comprising the additional steps of mixing the coated diamond abrasive particles with a sinterable metal, pressing the mixture at ambient temperature to form a solid mass of a desired shape and heating the solid mass to a temperature sufficiently high to sinter said sinterable metal.
Claim 28
Dependent Claim
17 words
A sintered metal bonded abrasive tool comprising a sintered metal matrix and abrasive particles of claim 1.
Claim 29
Dependent Claim
48 words
An abrasive tool which comprises a sintered metal matrix and multi-layer coated diamond abrasive particles wherein the multi-layer coating consists essentially of one homogenous carbide-forming primary metal layer chemically bonded to the surface of the diamond abrasive and at least one non-carbide forming metal secondary layer deposited electrolessly.
Claim 30
Dependent Claim
48 words
An abrasive tool which comprises a sintered metal matrix and multi-layer coated diamond abrasive particles wherein the multi-layer coating consists essentially of one homogenous carbide-forming primary metal layer chemically bonded to the surface of the diamond abrasive and at least one non-carbide forming metal secondary layer deposited electrolessly.
Claim 31
Dependent Claim
59 words
An abrasive tool according to claim 24, wherein the primary carbide forming metal primary layer is applied by packed salt deposition or chemical vapor deposition and the non-carbide forming metal secondary layer is applied by electroless deposition, and said carbide forming metal primary layer consists essentially of chromium, and said non-carbide forming metal secondary layer comprises cobalt/phosphorus or nickel/phosphorus.
Claim 32
Dependent Claim
15 words
An abrasive tool according to claim 24, which is an insert for a saw blade.
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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) | 1996-08-02 | 1997-02-01 | 1997-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-02 | 2001-02-01 | 2001-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-02 | 2005-02-01 | 2005-08-03 | $7700.00 | Window Closed / Lapsed |