Patent US4363968A successfully refreshed from Google Patents.
Patent US3940050A successfully refreshed from Google Patents.
US3940050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of joining diamond to metal
Assignee: EIDP Inc
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Filing: 1974-10-04
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Granted: 1976-02-24
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Expires: 1994-10-04
Abstract
Abstract Disclosed herein is an improved method for joining diamond to metal using a gold-tantalum or gold-niobium solder. The method utilizes powdered material, and a clamp to keep the diamond in place during the soldering step. The article produces has higher mechanical stability than articles produced by known procedures.
Inventors
- 👤 Donald R. Johnson
- 👤 James R. Sawers, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:12
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3013; B23K1/00; B23K1/19; B23P; B23P5/00; Y; Y10; Y10S; Y10S228/00; Y10S228/903
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
151 words
In a process, for joining a diamond to a metal shank, of the type comprising the steps of applying an alloy selected from the group consisting of gold-tantalum alloys containing from about 1 to about 25 percent by weight of tantalum, and gold-niobium alloys containing from about 1 to about 10 percent by weight of niobium to opposing surfaces of said diamond and said metal shank, and melting said alloy in an inert atmosphere; the improvement wherein said process proceeds by placing a first layer of said alloy and then said diamond in a depression formed in said metal shank, filling the space around said diamond with an inert powdered material, covering said diamond and said powdered material with a second layer of said alloy, and clamping the above constituents in place with a metal cap using sufficient force to prevent movement of said diamond during the melting of said alloy.
Claim 2
Dependent Claim
151 words
In a process, for joining a diamond to a metal shank, of the type comprising the steps of applying an alloy selected from the group consisting of gold-tantalum alloys containing from about 1 to about 25 percent by weight of tantalum, and gold-niobium alloys containing from about 1 to about 10 percent by weight of niobium to opposing surfaces of said diamond and said metal shank, and melting said alloy in an inert atmosphere; the improvement wherein said process proceeds by placing a first layer of said alloy and then said diamond in a depression formed in said metal shank, filling the space around said diamond with an inert powdered material, covering said diamond and said powdered material with a second layer of said alloy, and clamping the above constituents in place with a metal cap using sufficient force to prevent movement of said diamond during the melting of said alloy.
Claim 3
Dependent Claim
13 words
The process of claim 1 wherein said powdered material is a metal powder.
Claim 4
Dependent Claim
23 words
The process of claim 1 wherein said metal shank, said powdered material and said metal cap are all made from the same metal.
Claim 5
Dependent Claim
12 words
The process of claim 1 wherein said powdered material is molybdenum powder.
Claim 6
Dependent Claim
25 words
The process of claim 1 further comprising the step of grinding said shank and said diamond to form an exposed cutting surface on said diamond.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-23 | 1979-08-25 | 1980-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-23 | 1983-08-25 | 1984-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-23 | 1987-08-25 | 1988-02-24 | $7700.00 | Window Closed / Lapsed |