US3786552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing a composite bimetallic sleeve for a die-casting machine
Assignee: Mitsubishi Metal Corp
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Filing: 1972-06-27
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Granted: 1974-01-22
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Expires: 1992-06-27
Abstract
Abstract A sleeve is composed of a relatively thin inner layer made of such highly infusible material as molybdenum, tungsten or their alloys, and an outer layer made of an iron-base alloy. For manufacture, a mixture of powders compounded to form an iron-base alloy when heated is compacted to cylindrical shape around a hollow cylinder suitably molded of one of the listed metals and alloys. The compact is then sintered to provide an outer layer of the iron-base alloy solidly united with the hollow cylinder.
Inventors
- 👤 Y Saito
- 👤 T Shikano
- 👤 M Kimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:31
CPC Classifications
B; B22; B22D; B22D17/00; B22D17/20; B22D17/2015; B22D17/2023; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49865; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
The process according to claim 1, further including a step of covering the outer surface of said hollow cylinder, prior to the compacting step, with a thin layer of nickel to increase the bonding strength between said hollow cylinder as the inner layer and the outer layer.
Claim 2
Dependent Claim
19 words
The process according to claim 1, further comprising shrink fitting a hollow cylindrical steel covering on said outer layer.
References Cited (Backward Citations)
US464165A
Cited
US1989186A
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US3014266A
Cited
US3109224A
Cited
US3672881A
Cited
US3678567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |