US4525178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite polycrystalline diamond
Assignee: SII MegaDiamond Inc
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Filing: 1984-04-16
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Granted: 1985-06-25
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Expires: 2004-04-16
Abstract
Abstract A composite material is described which includes a mixture of individual diamond crystals and pieces of precemented carbide. The mixture is heated and pressurized to create intercrystalline bonds between the diamond crystals and chemical bonds between the diamond crystals and the precemented carbide pieces. The resulting composite polycrystalline diamond body exhibits excellent wear characteristics and impact resistance.
Inventors
- 👤 David R. Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:22
CPC Classifications
C; C22; C22C; C22C26/00; B; B01; B01J; B01J3/00; B01J3/06; B01J3/062; B22; B22F; B22F7/00; B22F7/06; B24; B24D; B24D3/00; B24D3/02; B24D3/04; B24D3/06; B28; B28D; B28D1/00; B28D1/02; B28D1/12; B28D1/121; E; E21; E21B; E21B10/00; E21B10/08; E21B10/22; E21B4/00; E21B4/003; F; F16; F16C; F16C17/00; F16C17/04; F16C17/10; F16C33/00; F16C33/02; F16C33/04; F16C33/043; F16C33/26; B01J2203/00; B01J2203/06; B01J2203/0605; B01J2203/062; B01J2203/065; B01J2203/0655; B01J2203/0675; B01J2203/0685; B22F2998/00; F16C2206/00; F16C2206/02; F16C2352/00
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
69 words
A composite material comprising: a mixture of diamond crystals and precemented carbide pieces formed under sufficient heat and pressure to create a composite polycrystalline body in which adjacent diamond crystals are bonded together and to the precemented carbide pieces, and in which the diamond crystals and the precemented carbide pieces are interspersed in one another, either the carbide pieces or diamond crystals providing a matrix for the composite material.
Claim 2
Dependent Claim
69 words
A composite material comprising: a mixture of diamond crystals and precemented carbide pieces formed under sufficient heat and pressure to create a composite polycrystalline body in which adjacent diamond crystals are bonded together and to the precemented carbide pieces, and in which the diamond crystals and the precemented carbide pieces are interspersed in one another, either the carbide pieces or diamond crystals providing a matrix for the composite material.
Claim 3
Dependent Claim
21 words
The invention of claim 1 wherein the weight percentage of the diamond crystals in the mixture is less than 50 percent.
Claim 4
Dependent Claim
21 words
The invention of claim 1 wherein the weight percentage of the diamond crystals in the mixture is less than 15 percent.
Claim 5
Dependent Claim
21 words
The invention of claim 1 wherein the weight percentage of the diamond crystals in the mixture is less than 5 percent.
Claim 6
Dependent Claim
27 words
The invention of claim 1 wherein the weight percentage of the diamond crystals in the mixture is in the range of about 40 to about 70 percent.
Claim 7
Dependent Claim
20 words
The invention of claim 1 wherein the weight percentage of the diamond crystals in the mixture is greater than 70%.
Claim 8
Dependent Claim
24 words
The invention of claim 1 wherein the diamond crystals are characterized by an average cross-sectional dimension less than that of the precemented carbide pieces.
Claim 9
Dependent Claim
13 words
The invention of claim 1 wherein the precemented carbide pieces are irregularly shaped.
Claim 10
Dependent Claim
13 words
The invention of claim 1 wherein the precemented carbide pieces are regularly shaped.
Claim 11
Dependent Claim
14 words
The invention of claim 9 wherein the precemented carbide pieces are substantially spherically shaped.
Claim 12
Dependent Claim
13 words
The invention of claim 1 wherein the precemented carbide pieces comprise tungsten carbide.
Claim 13
Dependent Claim
61 words
A composite material comprising: a polycrystalline diamond matrix formed of individual diamond crystals and having discrete pieces of precemented carbide intermixed with the individual diamond crystals and distributed throughout at least a portion of the polycrystalline diamond matrix, said individual diamond crystals bonded together and to the precemented carbide pieces under sufficient heat and pressure to form a dense, abrasion-resistant mass.
Claim 14
Dependent Claim
61 words
A composite material comprising: a polycrystalline diamond matrix formed of individual diamond crystals and having discrete pieces of precemented carbide intermixed with the individual diamond crystals and distributed throughout at least a portion of the polycrystalline diamond matrix, said individual diamond crystals bonded together and to the precemented carbide pieces under sufficient heat and pressure to form a dense, abrasion-resistant mass.
Claim 15
Dependent Claim
21 words
The invention of claim 12 wherein the weight percentage of the diamond matrix in the material is greater than 80 percent.
Claim 16
Dependent Claim
21 words
The invention of claim 12 wherein the weight percentage of the diamond matrix in the material is less than 50 percent.
Claim 17
Dependent Claim
19 words
The invention of claim 12 wherein the weight percentage of the diamond matrix in the material is about 90%.
Claim 18
Dependent Claim
25 words
The invention of claim 12 wherein the individual diamond crystals are characterized by an average cross-sectional dimension less than that of the precemented carbide pieces.
Claim 19
Dependent Claim
13 words
The invention of claim 12 wherein the precemented carbide pieces are irregularly shaped.
Claim 20
Dependent Claim
13 words
The invention of claim 12 wherein the precemented carbide pieces are regularly shaped.
Claim 21
Dependent Claim
14 words
The invention of claim 18 wherein the precemented carbide pieces are substantially spherically shaped.
Claim 22
Dependent Claim
13 words
The invention of claim 12 wherein the precemented carbide pieces comprise tungsten carbide.
Claim 23
Dependent Claim
68 words
A composite material comprising: a precemented carbide matrix formed of individual pieces of precemented carbide and having individual diamond crystals bonded together to form polycrystalline diamond masses intermixed with the individual pieces of precemented carbide and distributed throughout at least a portion of the precemented carbide matrix, said precemented carbide pieces and individual diamond crystals bonded together under sufficient heat and pressure to form a dense, abrasion-resistant mass.
Claim 24
Dependent Claim
68 words
A composite material comprising: a precemented carbide matrix formed of individual pieces of precemented carbide and having individual diamond crystals bonded together to form polycrystalline diamond masses intermixed with the individual pieces of precemented carbide and distributed throughout at least a portion of the precemented carbide matrix, said precemented carbide pieces and individual diamond crystals bonded together under sufficient heat and pressure to form a dense, abrasion-resistant mass.
Claim 25
Dependent Claim
22 words
The invention of claim 21 wherein the weight percentage of the precemented carbide matrix in the material is greater than 70 percent.
Claim 26
Dependent Claim
22 words
The invention of claim 21 wherein the weight percentage of the precemented carbide matrix in the material is greater than 85 percent.
Claim 27
Dependent Claim
22 words
The invention of claim 21 wherein the weight percentage of the precemented carbide matrix in the material is greater than 95 percent.
Claim 28
Dependent Claim
25 words
The invention of claim 21 wherein the individual diamond crystals are characterized by an average cross-sectional dimension less than that of the precemented carbide pieces.
Claim 29
Dependent Claim
13 words
The invention of claim 21 wherein the precemented carbide pieces are irregularly shaped.
Claim 30
Dependent Claim
13 words
The invention of claim 21 wherein the precemented carbide pieces are regularly shaped.
Claim 31
Dependent Claim
14 words
The invention of claim 27 wherein the precemented carbide pieces are substantially spherically shaped.
Claim 32
Dependent Claim
13 words
The invention of claim 21 wherein the precemented carbide pieces comprise tungsten 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) | 1988-06-24 | 1988-12-24 | 1989-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-24 | 1992-12-24 | 1993-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-24 | 1996-12-24 | 1997-06-25 | $7700.00 | Window Closed / Lapsed |