US5364423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making diamond grit and abrasive media
Assignee: Saint Gobain Abrasives Inc
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Filing: 1993-05-06
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Granted: 1994-11-15
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Expires: 2013-05-06
Abstract
Abstract Synthetic diamond film produced by chemical vapor deposition can be crushed to obtain diamond grit which has useful abrasive properties. The flexibility of CVD deposition processes in determining diamond film properties means that CVD diamond grit properties can be tailored to particular abrasive applications. In a disclosed embodiment, the grit particles are coated with a magnetic material. The coated grit particles can then be aligned with a magnetic field, and the coated grit particles are bonded to a matrix while aligned. In a further disclosed form of the invention, a chemical vapor deposition system, such as an arc jet plasma deposition system, is provided in a chamber.
Inventors
- 👤 Louis K. Bigelow
- 👤 Frank J. Csillag
- 👤 James T. Hoggins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:41
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/44; C23C16/54; C23C16/545; C09; C09K; C09K3/00; C09K3/14; C09K3/1436; C09K3/1445; C23C16/01; C23C16/22; C23C16/26; C23C16/27; C23C16/276; C30; C30B; C30B25/00; C30B25/02; C30B25/10; C30B25/105; C30B29/00; C30B29/02; C30B29/04
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
26 words
A method for making diamond grit, comprising the steps of: producing a diamond film by chemical vapor deposition; and crushing said film to obtain diamond grit.
Claim 2
Independent Claim
26 words
A method for making diamond grit, comprising the steps of: producing a diamond film by chemical vapor deposition; and crushing said film to obtain diamond grit.
Claim 3
Dependent Claim
35 words
The method as defined by claim 1, wherein said step of producing a diamond film comprises providing a substrate, generating a plasma comprising free carbon and atomic hydrogen, and exposing the substrate to the plasma.
Claim 4
Dependent Claim
30 words
The method as defined by claim 1, wherein said step of producing said diamond film comprises forming a film having a thickness in the range of 10 to 1000 microns.
Claim 5
Dependent Claim
30 words
The method as defined by claim 2, wherein said step of producing said diamond film comprises forming a film having a thickness in the range of 10 to 1000 microns.
Claim 6
Dependent Claim
35 words
The method as defined by claim 1, wherein said step of crushing the film comprises crushing said film to obtain grit particles, a substantial portion of which have an aspect ratio of at least 2:1.
Claim 7
Dependent Claim
35 words
The method as defined by claim 4, wherein said step of crushing the film comprises crushing said film to obtain grit particles, a substantial portion of which have an aspect ratio of at least 2:1.
Claim 8
Dependent Claim
32 words
The method as defined by claim 1, wherein said step of crushing said film comprises applying a force to said film in a direction substantially parallel to the thickness of said film.
Claim 9
Dependent Claim
32 words
The method as defined by claim 2, wherein said step of crushing said film comprises applying a force to said film in a direction substantially parallel to the thickness of said film.
Claim 10
Independent Claim
36 words
A method of making an abrasive medium, comprising the steps of: producing a diamond film by chemical vapor deposition; crushing the film to obtain diamond grit; providing a matrix; and bonding the grit to the matrix.
Claim 11
Independent Claim
36 words
A method of making an abrasive medium, comprising the steps of: producing a diamond film by chemical vapor deposition; crushing the film to obtain diamond grit; providing a matrix; and bonding the grit to the matrix.
Claim 12
Dependent Claim
33 words
The method as defined by claim 9, wherein said step of producing a diamond film comprises providing a substrate, generating a plasma comprising carbon and hydrogen, and exposing the substrate to the plasma.
Claim 13
Dependent Claim
29 words
The method as defined by claim 9, wherein said step of producing said diamond film comprises forming a film having a thickness in the range 10 to 1000 microns.
Claim 14
Dependent Claim
35 words
The method as defined by claim 8, wherein said step of crushing the film comprises crushing said film to obtain grit particles, a substantial portion of which have an aspect ratio of at least 2:1.
Claim 15
Dependent Claim
33 words
The method as defined by claim 9, wherein said step of crushing said film comprises applying a force to said film generally in a direction parallel to the thickness direction of said film.
Claim 16
Dependent Claim
46 words
The method as defined by claim 9, further comprising the steps of: coating particles of the grit with a magnetic material; aligning the coated grit particles with a magnetic field; and wherein said coated grit particles are bonded to said matrix while in the aligned condition.
Claim 17
Dependent Claim
47 words
The method as defined by claim 12, further comprising the steps of: coating particles of the grit with a magnetic material; and aligning the coated grit particles with a magnetic field; and wherein said coated grit particles are bonded to said matrix while in the aligned condition.
Claim 18
Independent Claim
60 words
A method for making diamond grit, comprising the steps of: providing a chemical vapor deposition system; moving a carrier strip and the deposition system with respect to each other, and causing said system to deposit a film of a diamond material on said carrier strip; removing the film from the strip; and crushing the film to obtain the diamond grit.
Claim 19
Independent Claim
60 words
A method for making diamond grit, comprising the steps of: providing a chemical vapor deposition system; moving a carrier strip and the deposition system with respect to each other, and causing said system to deposit a film of a diamond material on said carrier strip; removing the film from the strip; and crushing the film to obtain the diamond grit.
Claim 20
Dependent Claim
25 words
The method as defined by claim 16, wherein moving step comprises moving an elongated strip of flexible material with respect to a stationary deposition system.
Claim 21
Dependent Claim
29 words
The method as defined by claim 16, wherein said carrier strip is of a flexible material, and wherein said step of removing the diamond film comprises flexing said strip.
Claim 22
Dependent Claim
35 words
The method as defined by claim 16, wherein said strip has a release agent upon which said film is deposited, and wherein the step of removing said film comprises causing release of said release agent.
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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) | 1997-11-14 | 1998-05-16 | 1998-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-14 | 2002-05-16 | 2002-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-14 | 2006-05-16 | 2006-11-15 | $7700.00 | Window Closed / Lapsed |