US4764434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diamond tools for rock drilling and machining
Assignee: Sandvik AB
•
Filing: 1987-06-26
•
Granted: 1988-08-16
•
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 19:28
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.
References Cited (Backward Citations)
US2941248A
Cited
US3239321A
Cited
US3136615A
Cited
US3141746A
Cited
US3233988A
Cited
US3407445A
Cited
US3767371A
Cited
US3745623A
Cited
USRE32380E
Cited
US4063909A
Cited
US4108614A
Cited
US4229186A
Cited
US4228942A
Cited
US4167399A
Cited
US4124401A
Cited
US4151686A
Cited
US4293618A
Cited
US4241135A
Cited
JPS56208A
Cited
US4403015A
Cited
US4411672A
Cited
US4311490A
Cited
US4686080A
Cited
US4604106A
Cited
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 |