US4764434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diamond tools for rock drilling and machining
Assignee: Sandvik AB
•
Filing: 1987-06-26
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Granted: 1988-08-16
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Expires: 2007-06-26
Abstract
Abstract A polycrystalline diamond tool comprising a diamond layer is bonded to a support body having a complex, non-plane geometry by means of a thin more than 3 μm continuous layer of a refractory material applied by PVD or CVD technique.
Inventors
- 👤 Sven B. Aronsson
- 👤 Mats G. Waldenstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:08
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/56; E21B10/567; E21B10/573; E21B10/5735; B; B22; B22F; B22F7/00; B22F7/06; B24; B24D; B24D3/00; B24D3/007; B24D3/02; B24D3/04; B24D3/06; B24D3/10; C; C23; C23C; C23C14/00; C23C14/06; C23C14/0641; C23C16/00; C23C16/22; C23C16/30; C23C16/34; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12146; Y10T428/30
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
57 words
A polycrystalline diamond tool comprising a layer of more than 50% by volume of diamond compact bonded to a support body by means of a thin, more than 3 μm continuous, metal diffusion-blocking, intermediate bonding layer of a refractory material applied by PVD or CVD technique, the coated surface of said support body having a non-plane geometry.
Claim 2
Dependent Claim
57 words
A polycrystalline diamond tool comprising a layer of more than 50% by volume of diamond compact bonded to a support body by means of a thin, more than 3 μm continuous, metal diffusion-blocking, intermediate bonding layer of a refractory material applied by PVD or CVD technique, the coated surface of said support body having a non-plane geometry.
Claim 3
Dependent Claim
23 words
A polycrystalline diamond tool according to claim 1 wherein the refractory material is titanium nitride and the support body consists of cemented carbide.
Claim 4
Dependent Claim
15 words
A polycrystalline diamond tool according to claim 1 wherein the refractory material is titanium nitride.
Claim 5
Dependent Claim
18 words
A polycrystalline diamond tool according to claim 3 wherein the non-plane geometry comprises a series of rectangular teeth.
Claim 6
Dependent Claim
16 words
A polycrystalline diamond tool according to claim 3 wherein the non-plane geometry comprises a curved surface.
Claim 7
Dependent Claim
71 words
In a polycrystalline diamond tool comprising an outermost layer comprising more than 50 volume percent diamond bonded to a cemented carbide support wherein the support has a non-planer surface, the improvement which comprises bonding said diamond layer to said cemented carbide support through a continuous, metal diffusion-blocking thin bonding layer more than 3 μm thick of a refractory material applied by physical vapor deposition or chemical vapor deposition to said support.
Claim 8
Dependent Claim
71 words
In a polycrystalline diamond tool comprising an outermost layer comprising more than 50 volume percent diamond bonded to a cemented carbide support wherein the support has a non-planer surface, the improvement which comprises bonding said diamond layer to said cemented carbide support through a continuous, metal diffusion-blocking thin bonding layer more than 3 μm thick of a refractory material applied by physical vapor deposition or chemical vapor deposition to said support.
Claim 9
Dependent Claim
63 words
In a polycrystalline diamond tool comprising an outermost layer comprising more than 50 volume percent diamond bonded to a cemented carbide support wherein the support has a non-planer surface, the improvement which comprises bonding said diamond layer to said cemented carbide support through a continuous thin layer more than 3 μm thick of titanium nitride applied by physical vapor deposition to said support.
Claim 10
Dependent Claim
63 words
In a polycrystalline diamond tool comprising an outermost layer comprising more than 50 volume percent diamond bonded to a cemented carbide support wherein the support has a non-planer surface, the improvement which comprises bonding said diamond layer to said cemented carbide support through a continuous thin layer more than 3 μm thick of titanium nitride applied by physical vapor deposition to said support.
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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) | 1991-08-16 | 1992-02-15 | 1992-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-16 | 1996-02-15 | 1996-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-16 | 2000-02-15 | 2000-08-16 | $7700.00 | Window Closed / Lapsed |