US3629929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacturing compacted tubes and rods
Assignee: Vodafone GmbH
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Filing: 1969-07-03
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Granted: 1971-12-28
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Expires: 1989-07-03
Abstract
Abstract The disclosure relates to utilization of metallic shavings, usually regarded as waste. The shavings are compressed to billets and extruded. Prior to extrusion the shavings and/or the billets may be annealed. To control composition the shavings may be mixed with particular powder at selected ratios prior to compression.
Inventors
- 👤 Otto Wessel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:55
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/20; B21; B21C; B21C23/00; B21C23/01; B22F8/00; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y02W; Y02W30/00; Y02W30/50; Y10; Y10S; Y10S29/00; Y10S29/047; Y10T; Y10T29/00; Y10T29/49; Y10T29/49751; Y10T29/49753
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
39 words
The method as set forth in claim 1, including the steps of providing a metal powder having composition different from the shavings, and mixing powder and shavings at a particular selected ratio to control composition of the extruded workpiece.
Claim 2
Dependent Claim
22 words
A method as set forth in claim 1, and including the step, preceding the compressing of the shavings, of cleaning the shavings.
Claim 3
Dependent Claim
19 words
A method as set forth in claim 3, the cleaning step including subjecting the shavings to a degreasing liquid.
Claim 4
Dependent Claim
17 words
A method as set forth in claim 1, the shavings being provided from materials of different composition.
Claim 5
Dependent Claim
20 words
A method as set forth in claim 1, and including the step of mixing different metal powders with the shavings.
Claim 6
Dependent Claim
19 words
A method as set forth in claim 1 and including the step of mixing the shavings with wire cuttings.
Claim 7
Dependent Claim
17 words
A method as set forth in claim 7, the wire cuttings originating from wires of different material.
Claim 8
Dependent Claim
31 words
The method as set forth in claim 1 and including the step of mixing the shavings with a metal powder, the metal powder constituting up to 80 percent of the mixture.
Claim 9
Dependent Claim
26 words
The method as set forth in claim 9 and including the step of heat treating the shavings while exposed to air prior to mixing with powder.
Claim 10
Dependent Claim
21 words
A method as set forth in claim 1 and including the additional step of oxidizingly annealing the shavings prior to compressing.
Claim 11
Dependent Claim
32 words
A method as set forth in claim 1 and including the step of mixing the shavings prior to compressing with metal powder in a relationship of 20 to 60 percent metal powder.
Claim 12
Dependent Claim
39 words
Method as in claim 1, the providing step comprising the providing of chromium nickel steel shavings, and annealing the shavings at a temperature of about 800* to 1,000* C. prior to compression, to obtain oxide coating on the shavings.
Claim 13
Dependent Claim
19 words
Method as in claim 13, including mixing the annealed shavings with a steel powder of differing chromium nickel content.
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |