US4043716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for providing a stream of molten metal from a metallic ingot
Assignee: GTE Sylvania Inc
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Filing: 1975-12-04
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Granted: 1977-08-23
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Expires: 1995-12-04
Abstract
Abstract An apparatus and method for providing a stream of molten metal from a metallic ingot wherein a quantity of the molten metal from the melted ingot is maintained at an established level within the chamber of the apparatus. It is further heated to an established temperature to then facilitate passage of the molten material through the apparatus's orifice.
Inventors
- 👤 William Daniel Lafferty
- 👤 James Thomas Smith
- 👤 Nicholas Wayne Rench
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:29
CPC Classifications
B; B22; B22D; B22D23/00; B22D23/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
183 words
An apparatus for providing a stream of molten metal from a metallic ingot heated to melting within said apparatus, said apparatus comprising: a substantially upright crucible member defining a chamber therein for receiving said metallic ingot and including a lower base portion having at least one orifice therein, said orifice including a first open end having access to said chamber and an opposing second open end having access to the environment below said crucible member; means within said crucible member for maintaining a quantity of molten metal from said metallic ingot at an established level within said chamber substantially below said first open end of said orifice; and heating means positioned externally of said crucible member for heating said metallic ingot to a predetermined temperature sufficient to melt said ingot at a pre-established rate and for heating said quantity of molten metal within said maintaining means to an establishd temperature greater than said predetermined temperature of said ingot to facilitate passage of said molten metal through said orifice when said molten metal within said maintaining means exceeds said established level within said chamber.
Claim 2
Independent Claim
183 words
An apparatus for providing a stream of molten metal from a metallic ingot heated to melting within said apparatus, said apparatus comprising: a substantially upright crucible member defining a chamber therein for receiving said metallic ingot and including a lower base portion having at least one orifice therein, said orifice including a first open end having access to said chamber and an opposing second open end having access to the environment below said crucible member; means within said crucible member for maintaining a quantity of molten metal from said metallic ingot at an established level within said chamber substantially below said first open end of said orifice; and heating means positioned externally of said crucible member for heating said metallic ingot to a predetermined temperature sufficient to melt said ingot at a pre-established rate and for heating said quantity of molten metal within said maintaining means to an establishd temperature greater than said predetermined temperature of said ingot to facilitate passage of said molten metal through said orifice when said molten metal within said maintaining means exceeds said established level within said chamber.
Claim 3
Dependent Claim
15 words
The apparatus according to claim 1 wherein said crucible member is comprised of boron nitride.
Claim 4
Dependent Claim
17 words
The apparatus according to claim 2 wherein said metallic ingot is an iron group metal based superalloy.
Claim 5
Dependent Claim
29 words
The apparatus according to claim 1 wherein said crucible member includes a substantially open upper end portion, said upper end portion adapted for having said metallic ingot pass therethrough.
Claim 6
Dependent Claim
44 words
The apparatus according to claim 1 wherein said means for maintaining said molten metal at an established level comprises a recessed portion within said lower base portion of said crucible member, said recessed portion positioned substantially below said first open end of said orifice.
Claim 7
Dependent Claim
19 words
The apparatus according to claim 5 wherein said recessed portion is positioned relative to and substantially about said orifice.
Claim 8
Dependent Claim
28 words
The apparatus according to claim 5 wherein said base portion further includes an upstanding portion, said upstanding portion extending substantially above said first open end of said orifice.
Claim 9
Dependent Claim
15 words
The apparatus according to claim 7 wherein said upstanding portion is of substantially conical configuration.
Claim 10
Dependent Claim
16 words
The apparatus according to claim 1 wherein said heating means comprises an electrically actuated induction coil.
Claim 11
Dependent Claim
17 words
The apparatus according to claim 9 wherein said induction coil is positioned substantially about said crucible member.
Claim 12
Dependent Claim
23 words
The apparatus according to claim 1 wherein said orifice has a diameter within the range of from about 0.050 to about 0.100 inches.
References Cited (Backward Citations)
US1932499A
Cited
US2712621A
Cited
US2790019A
Cited
US2963821A
Cited
US3378883A
Cited
US3726621A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |