US3598168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Titanium casting process
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1968-10-14
•
Granted: 1971-08-10
•
Expires: 1988-10-14
Abstract
Abstract Method and apparatus for casting a titanium alloy which involves suspending a slug of the alloy in spaced relation to the walls of a refractory crucible, inductively heating the slug while so suspended to eventually melt the same, collecting the molten alloy on a disc of titanium alloy positioned in the crucible, and then continuing the application of heat to the molten metal while supported on the disc until the molten metal melts the disc and can then be directed to a mold.
Inventors
- 👤 Clyde C Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:47
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/22; H05B6/30; B; B22; B22D; B22D21/00; B22D21/002; B22D21/005; B22D27/00; B22D27/02; C; C22; C22B; C22B4/00; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
13 words
The method of claim 1 in which said crucible is composed of graphite.
Claim 2
Dependent Claim
18 words
The method of claim 1 in which said disc is composed of the same alloy as said slug.
Claim 3
Dependent Claim
78 words
In a method of casting a titanium alloy, the steps comprising suspending a slug of said alloy in spaced relation to the walls of a refractory electrically conductive crucible, inductively heating said slug until the slug reaches a substantially uniform temperature throughout, which temperature is within about 100* F. of the slug melting point, and increasing the quantity of inductive heating to rapidly melt the slug and thereby create a molten pool of the alloy in said crucible.
References Cited (Backward Citations)
US2091087A
Cited
US2871533A
Cited
US2866700A
Cited
US3060065A
Cited
US3226223A
Cited
US3435878A
Cited
US3529958A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |