Patent US3756054A successfully refreshed from Google Patents.
US3756054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing rods or wire of compound material having non-circular cross-section by hydrostatic extrusion
Assignee: ABB Norden Holding AB
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Filing: 1972-02-07
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Granted: 1973-09-04
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Expires: 1992-02-07
Abstract
Abstract A wire or rod having an aluminum or aluminum alloy core and a copper or copper alloy casing is produced by hydrostatic extrusion of a compound billet through a die having a conical inlet with an outerpart with a cone angle between 70* and 115* and an inner part with a cone angle between 130* and 150*, the diameter of the inner part being substantially equal to the greatest dimension of the die opening.
Inventors
- 👤 J Nilsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:29
CPC Classifications
B; B21; B21C; B21C25/00; B21C25/02; B21C23/00; B21C23/22
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
15 words
Method according to claim 1, in which the extrusion ratio is between 50:1 and 500:1.
Claim 2
Dependent Claim
64 words
Die for hydrostatically extruding sections having noncircular cross-section and a core of aluminum and casing of copper the die (10) having a double conical inlet opening (20) and the outer, first conical part (21) having a cone angle ( Alpha ) between 70* and 115* and the inner, second conical part (22) having a cone angle ( Beta ) between 130* and 150* .
Claim 3
Dependent Claim
37 words
Die according to claim 3, in which the diameter at the transition between the first and second conical parts (21,11) of the inlet opening (20) is approximately equal to the largest dimension D of the die opening.
Claim 4
Dependent Claim
48 words
Die according to claim 3, in which the die opening (23) is rectangular and the diameter at the transition between the first and second conical parts (21, 22) of the inlet opening (20) is approximately equal to the length of the diagonal (D) of the die opening (23).
Claim 5
Dependent Claim
43 words
Die according to claim 3, in which the cone angle ( Alpha ) of the first conical part (21) is between 75* and 85* and the cone angle ( Beta ) of the second conical part (22) is between 135* and 145* .
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |