Patent US3831428A successfully refreshed from Google Patents.
US3831428A
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US
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Composite wire drawing die
Assignee: General Electric Co
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Filing: 1973-03-26
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Granted: 1974-08-27
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Expires: 1993-03-26
Abstract
Abstract Composite wire drawing die construction is described in which a centrally-located mass of diamond, cubic boron nitride or a polycrystalline mixture thereof defines at least the throat of the wire drawing hole, the mass being flanked or girded by at least one mass of metal bonded carbide that is directly bonded thereto. The composite is readily ground into the form of a solid of revolution. In the preferred construction (for dies for drawing 0.008 inches diameter wire and larger) a composite assembly includes at least one high strength metal ring that is press fitted around a composite body or sub-assembly comprising a polycrystalline mass of diamond girded by a metal-bonded carbide jacket.
Inventors
- 👤 R Wentorf
- 👤 W Rocco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:11
CPC Classifications
B; B01; B01J; B01J3/00; B01J3/06; B01J3/062; B21; B21C; B21C3/00; B21C3/02; B21C3/025; B22; B22F; B22F7/00; B22F7/06; B01J2203/00; B01J2203/06; B01J2203/0605; B01J2203/062; B01J2203/0645; B01J2203/065; B01J2203/0655; B01J2203/066; B01J2203/0675; B01J2203/0685
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
17 words
The wire drawing die as recited in claim 1 wherein the inner mass is predominately polycrystalline diamond.
Claim 2
Dependent Claim
19 words
The wire drawing die as recited in claim 1 wherein the inner mass is predominately polycrystalline cubic boron nitride.
Claim 3
Dependent Claim
31 words
The wire drawing die as recited in claim 1 wherein the inner mass is in a generally cylindrical form and the carbide mass is in the form of a jacket therearound.
Claim 4
Dependent Claim
20 words
The wire drawing die as recited in claim 4 wherein the composite is in the shape of a truncated cone.
Claim 5
Dependent Claim
22 words
The wire drawing die as recited in claim 1 wherein the composite is press fitted into a high tensile strength annular body.
Claim 6
Dependent Claim
30 words
The wire drawing die as recited in claim 6 wherein the outer wall of the composite is in a state of permanent compressive stress of at least about 10,000 psi.
Claim 7
Dependent Claim
17 words
The wire drawing die as recited in claim 6 wherein the annular body is made of metal.
Claim 8
Dependent Claim
20 words
The wire drawing die as recited in claim 1 wherein the composite is in the shape of a truncated cone.
Claim 9
Dependent Claim
25 words
The wire drawing die as recited in claim 1 wherein the inner mass is both flanked and girded by the mass of metal bonded carbide.
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) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |