US4832705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing abrasive particle-containing bodies
Assignee: Individual
•
Filing: 1988-06-03
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Granted: 1989-05-23
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Expires: 2008-06-03
Abstract
Abstract The invention provides a method of producing an abrasive particle, particularly diamond, containing strip. The strip will contain 50 percent or less by volume of the diamond particles and a supporting matrix which will generally be metal. The method involves making a mixture of the abrasive particles and the supporting matrix in particulate form, causing a thin layer of the mixture to be deposited on to a support surface, compacting the layer and heat treating the compacted layer under conditions which will not lead to degradation of the abrasive particles to produce the strip.
Inventors
- 👤 Idwal Davies
- 👤 John Bellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:39
CPC Classifications
B; B24; B24D; B24D3/00; C; C22; C22C; C22C26/00; B22; B22F; B22F3/00; B22F3/18; B22F3/22; B22F5/00; B22F5/006
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
101 words
A method of producing an elongate, thin, coherent and self-supporting body comprising a mass of discrete abrasive particles uniformly dispersed and held in a support matrix, the abrasive particles being present in an amount not exceeding 50 percent by volume of the body, including the steps of providing a mixture of the abrasive particles and the support matrix in particulate form, causing a thin layer of this mixture to be deposited on to a support surface, compacting the layer and heat treating the compacted layer under conditions which will not lead to degradation of the abrasive particles to produce the body.
Claim 2
Independent Claim
101 words
A method of producing an elongate, thin, coherent and self-supporting body comprising a mass of discrete abrasive particles uniformly dispersed and held in a support matrix, the abrasive particles being present in an amount not exceeding 50 percent by volume of the body, including the steps of providing a mixture of the abrasive particles and the support matrix in particulate form, causing a thin layer of this mixture to be deposited on to a support surface, compacting the layer and heat treating the compacted layer under conditions which will not lead to degradation of the abrasive particles to produce the body.
Claim 3
Dependent Claim
19 words
A method according to claim 1 wherein the body has the form of a strip, sheet or the like.
Claim 4
Dependent Claim
17 words
A method according to claim 1 wherein the thickness of the body does not exceed 1 mm.
Claim 5
Dependent Claim
19 words
A method of claim 1 wherein the thickness of the body is in the range 0.2 to 0.7 mm.
Claim 6
Dependent Claim
19 words
A method of claim 1 wherein the thickness of the body is in the range 0.2 to 0.5 mm.
Claim 7
Dependent Claim
12 words
A method according to claim 1 wherein the support matrix is metallic.
Claim 8
Dependent Claim
14 words
A method according to claim 6 wherein the support matrix is an iron-containing alloy.
Claim 9
Dependent Claim
16 words
A method according to claim 1 wherein the abrasive particles are diamond or cubic boron nitride.
Claim 10
Dependent Claim
25 words
A method according to claim 1 wherein the abrasive particles are present in an amount of 20 to 40 percent by volume of the body.
Claim 11
Dependent Claim
19 words
A method according to claim 1 wherein the compaction is achieved under a pressure of up to 60 tons.
Claim 12
Dependent Claim
28 words
A method according to claim 1 wherein the matrix is metallic and the heat treatment is carried out at a temperature below the melting point of the metal.
Claim 13
Dependent Claim
42 words
A method according to claim 11 wherein the metal has a melting point above 1500° C. and the heat treatment is carried out at a temperature in the range 600° C. to 1000° C. for a period of 1 to 20 minutes.
Claim 14
Dependent Claim
47 words
A method according to claim 1 wherein a slurry of the particulate mixture and a film-forming binder material in water is made and the slurry is deposited on the support surface and a major part of the water is removed from the slurry before the compaction step.
Claim 15
Dependent Claim
14 words
A method according to claim 13 wherein the film-forming binder is a cellulose binder.
Claim 16
Dependent Claim
27 words
A method according to claim 1 wherein the body, after heat treatment, is subjected to further compaction or heat treatment steps or a combination of these steps.
Claim 17
Independent Claim
149 words
A method of producing an elongate, thin, coherent and self-supporting strip having a thickness of less than 1 mm and comprising a mass of discrete abrasive particles uniformly dispersed and held in a metallic support matrix, the abrasive particles being present in an amount not exceeding 50 percent by volume of the strip and the metal having a melting point above 1500° C., including the steps of making a slurry a mixture of the abrasive particles and the support matrix, in particulate form, and a film-forming binder material in water, depositing a thin layer of the slurry on a support surface, removing a major part of the water from the slurry, compacting the layer, and heat treating the compacted layer at a temperature in the range 600° C. to 1000° C. for a period of 1 to 20 minutes in an atmosphere selected from non-oxidising, reducing and inert atmospheres.
Claim 18
Independent Claim
149 words
A method of producing an elongate, thin, coherent and self-supporting strip having a thickness of less than 1 mm and comprising a mass of discrete abrasive particles uniformly dispersed and held in a metallic support matrix, the abrasive particles being present in an amount not exceeding 50 percent by volume of the strip and the metal having a melting point above 1500° C., including the steps of making a slurry a mixture of the abrasive particles and the support matrix, in particulate form, and a film-forming binder material in water, depositing a thin layer of the slurry on a support surface, removing a major part of the water from the slurry, compacting the layer, and heat treating the compacted layer at a temperature in the range 600° C. to 1000° C. for a period of 1 to 20 minutes in an atmosphere selected from non-oxidising, reducing and inert atmospheres.
Claim 19
Dependent Claim
12 words
A method of claim 16 wherein the abrasive particles are diamond particles.
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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) | 1992-05-22 | 1992-11-21 | 1993-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-22 | 1996-11-21 | 1997-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-22 | 2000-11-21 | 2001-05-23 | $7700.00 | Window Closed / Lapsed |