Patent US5387447A successfully refreshed from Google Patents.
US5387447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing uniform cylindrical tubes of CVD diamond
Assignee: Diamond Innovations Inc
•
Filing: 1993-10-19
•
Granted: 1995-02-07
•
Expires: 2013-10-19
Abstract
Abstract The present invention provides a method for forming uniform CVD diamond coatings on a substrate wherein diamond is deposited on a plurality of substrates which are rotated in unison during the coating process to provide for more uniform radial growth. An advantageous substrate is a wire which can be coated with a layer of CVD diamond for making components in water-jet cutting apparatus, wire-drawing dies, or other tubular articles when the wire is separated from the resulting diamond tube. Identical tubes with higher uniformity in wall thickness are among the products which can be obtained. In addition, tubes having a uniform particle size distribution along their wall thickness which supports columnar diamond growth are also provided.
Inventors
- 👤 David E. Slutz
- 👤 Friedel S. Knemeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:02
CPC Classifications
B; B23; B23P; B23P11/00; C; C23; C23C; C23C16/00; C23C16/01; B21; B21C; B21C3/00; B21C3/02; B21C3/025; C23C16/22; C23C16/26; C23C16/27; C23C16/271; Y; Y10; Y10T; Y10T407/00; Y10T407/27; Y10T428/00; Y10T428/13; Y10T428/24; Y10T428/24942; Y10T428/26; Y10T428/268; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/30
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
74 words
A wire die comprising an annularly shaped diamond body with a central opening having an interior surface with a uniform diameter, said body comprising diamond grains having columar growth extending in a radial direction from said interior surface wherein said diamond grains are smaller near said interior surface and larger with increasing distance along a radial direction away from said interior surface, said diamond grains having plurality of grain boundaries adjacent said interior surface.
Claim 2
Dependent Claim
74 words
A wire die comprising an annularly shaped diamond body with a central opening having an interior surface with a uniform diameter, said body comprising diamond grains having columar growth extending in a radial direction from said interior surface wherein said diamond grains are smaller near said interior surface and larger with increasing distance along a radial direction away from said interior surface, said diamond grains having plurality of grain boundaries adjacent said interior surface.
Claim 3
Dependent Claim
34 words
A wire die according to claim 1 consisting essentially of a symmetrical cylinder of chemically vapor-deposited diamond having a uniform inner diameter which varies by less than 0.1% in dimension along the cylinder length.
Claim 4
Dependent Claim
58 words
A wire die according to claim 1 wherein said uniform inner diameter is in the range of 0.025 to 2.5 mm and varies by less than 0.1% in dimension along the length thereof, said annularly shaped body has a wall thickness in the range of 1-2,000 μm, and a particle size distribution gradient along the tube wall thickness.
Claim 5
Dependent Claim
14 words
A wire die according to claim 1 wherein said diamond grains are deposited diamond.
Claim 6
Dependent Claim
18 words
A wire die according to claim 4 wherein said diamond grains are deposited by a hot filament process.
References Cited (Backward Citations)
US4707384A
Cited
JPH01138110A
Cited
US5133332A
Cited
US5130111A
Cited
EP0437830A1
Cited
EP0442303A1
Cited
EP0467634A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-02-06 | 1998-08-08 | 1999-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-02-06 | 2002-08-08 | 2003-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-02-06 | 2006-08-08 | 2007-02-07 | $7700.00 | Window Closed / Lapsed |