US5062865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemically bonded superabrasive grit
Assignee: Saint Gobain Abrasives Inc
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Filing: 1989-11-22
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Granted: 1991-11-05
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Expires: 2009-11-22
Abstract
Abstract Superabrasive grits such as diamond or CBN is chemically bonded with a coating such as tungsten which is in turn bonded to a tool body providing superabrasive cutting tools such as saw blades, grinding wheels, drill bits and the like.
Inventors
- 👤 Sy-Hwa Chen
- 👤 Chien-Min Sung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:04
CPC Classifications
B; B28; B28D; B28D1/00; B28D1/02; B28D1/12; B24; B24D; B24D3/00; B24D3/02; B24D3/04; B24D3/06; C; C09; C09K; C09K3/00; C09K3/14; C09K3/1436; C09K3/1445; C22; C22C; C22C26/00; E; E21; E21B; E21B10/00; E21B10/46
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
105 words
A coated superabrasive grit, comprising superabrasive grit particles having roughened surfaces by chemical and/or mechanical systems, said superabrasive grit being selected from the group consisting of diamond and CBN, a substantially continuous first metallic coating on top of said roughened surfaces and being chemically bonded thereto, said first metallic coating being selected from the group consisting of W, Mo, Ta, Nb, and alloys thereof, and a second substantially continuous metallic coating on tope of said first metallic coating, said second metallic coating comprising nickel or copper said first and second metallic coatings having a total thickness in the range of about 1 to 50 microns.
Claim 2
Dependent Claim
105 words
A coated superabrasive grit, comprising superabrasive grit particles having roughened surfaces by chemical and/or mechanical systems, said superabrasive grit being selected from the group consisting of diamond and CBN, a substantially continuous first metallic coating on top of said roughened surfaces and being chemically bonded thereto, said first metallic coating being selected from the group consisting of W, Mo, Ta, Nb, and alloys thereof, and a second substantially continuous metallic coating on tope of said first metallic coating, said second metallic coating comprising nickel or copper said first and second metallic coatings having a total thickness in the range of about 1 to 50 microns.
Claim 3
Dependent Claim
28 words
A tool which comprises a coated superabrasive grit according to claim 1 which is in contact with a matrix and said matrix being bonded to a tool body.
Claim 4
Dependent Claim
13 words
A tool according to claim 2 in which the tool body is metallic.
Claim 5
Dependent Claim
13 words
A tool according to claim 2 in which the tool body is non-metallic.
Claim 6
Dependent Claim
11 words
A tool according to claim 3 which is a saw blade.
Claim 7
Dependent Claim
11 words
A tool according to claim 3 which is a drill bit.
Claim 8
Dependent Claim
20 words
A tool according to claim 2 in which the grit has a packing efficiency of more than 70% by volume.
Claim 9
Dependent Claim
27 words
A cutting tool which comprises as cutting members a surface roughened superabrasive grit according to claim 1 and said grit being an integral part of a tool.
Claim 10
Dependent Claim
15 words
A tool according to claim 8 which is in the form of a saw blade.
Claim 11
Dependent Claim
15 words
A tool according to claim 8 which is in the form of a grinding wheel.
Claim 12
Dependent Claim
15 words
A tool according to claim 8 which is in the form of a drill bit.
Claim 13
Dependent Claim
16 words
A coated superabrasive grit as defined in claim 1 wherein said first metallic coating is tungsten.
Claim 14
Dependent Claim
16 words
A coated superabrasive grit as defined in claim 1 wherein said second metallic coating comprises nickel.
Claim 15
Dependent Claim
16 words
A coated superabrasive grit as defined in claim 1 wherein said second metallic coating comprises NiB.
Claim 16
Dependent Claim
23 words
A coated superabrasive grit as defined in claim 1 wherein said first metallic coating is tungsten and said second metallic coating comprises NiB.
Claim 17
Dependent Claim
29 words
A coated superabrasive grit as defined in claim 15 wherein said first metallic coating is about 10 microns thick and said second metallic coating is about 30 microns thick.
Claim 18
Independent Claim
103 words
A method for making a superabrasive grit, comprising roughening by chemical and/or mechanical systems the outer surfaces of superabrasive grit particles, said superabrasive grit particles being selected from the group consisting of diamond and CBN particles, applying a first substantially continuous metallic coating on top of said roughened surfaces, said first metallic coating being selected from the group consisting of W, Mo, Ta, Nb, and alloys thereof, causing said first metallic coating to bond chemically to said superabrasive grit particles, and applying a second substantially continuous metallic coating on top of said first metallic coating, said second metallic coating comprising nickel or copper.
Claim 19
Independent Claim
103 words
A method for making a superabrasive grit, comprising roughening by chemical and/or mechanical systems the outer surfaces of superabrasive grit particles, said superabrasive grit particles being selected from the group consisting of diamond and CBN particles, applying a first substantially continuous metallic coating on top of said roughened surfaces, said first metallic coating being selected from the group consisting of W, Mo, Ta, Nb, and alloys thereof, causing said first metallic coating to bond chemically to said superabrasive grit particles, and applying a second substantially continuous metallic coating on top of said first metallic coating, said second metallic coating comprising nickel or copper.
Claim 20
Dependent Claim
13 words
The method of claim 17 wherein said superabrasive grit particles are roughened mechanically.
Claim 21
Dependent Claim
14 words
The method of claim 17 wherein said superabrasive grit particles are roughened by milling.
Claim 22
Dependent Claim
13 words
The method of claim 17 wherein said superabrasive grit particles are roughened chemically.
Claim 23
Dependent Claim
14 words
The method of claim 17 wherein said superabrasive grit particles are roughened by oxidation.
Claim 24
Dependent Claim
15 words
The method of claim 17 wherein said superabrasive grit particles are roughened by chemical etching.
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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) | 1994-11-04 | 1995-05-06 | 1995-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-04 | 1999-05-06 | 1999-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-04 | 2003-05-06 | 2003-11-05 | $7700.00 | Window Closed / Lapsed |