US3623541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal casting apparatus
Assignee: Individual
•
Filing: 1969-10-29
•
Granted: 1971-11-30
•
Expires: 1989-10-29
Abstract
Abstract A crucible having a bottom outlet opening with heating means disposed about the sidewall and downwardly as far as the outlet, mold supporting means beneath the crucible outlet, a gate for closing and opening the outlet, the underside of the bottom of the crucible being concave and the gate comprising a pair of upwardly convex members in movable sealing engagement with the underside of the crucible bottom and having the same curvature as the concave underside, whereby the outlet and gate are located in the heating zone provided by the heating means.
Inventors
- 👤 William L Schmitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:24
CPC Classifications
B; B22; B22D; B22D18/00; B22D18/04; B22D37/00; B22D41/00; B22D41/14
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
124 words
Casting apparatus for molten materials including a vertical crucible having a sidewall and having a bottom wall with a concave bottom face having an outlet therethrough, wherein the improvement comprises: electrical heatinG means lying about the sidewall and the bottom portion of the sidewall; of the crucible, means for supporting said crucible and its bottom outlet above a mold, and a gate supported beneath said crucible in sealing contact with the concave bottom face of said bottom wall about said outlet and pivotally movable in sliding contact with said concave bottom face; from a position closing said bottom outlet to an open position out of vertical alignment with said outlet permitting free gravity drop of molten materials directly from the outlet of the crucible.
Claim 2
Dependent Claim
124 words
Casting apparatus for molten materials including a vertical crucible having a sidewall and having a bottom wall with a concave bottom face having an outlet therethrough, wherein the improvement comprises: electrical heatinG means lying about the sidewall and the bottom portion of the sidewall; of the crucible, means for supporting said crucible and its bottom outlet above a mold, and a gate supported beneath said crucible in sealing contact with the concave bottom face of said bottom wall about said outlet and pivotally movable in sliding contact with said concave bottom face; from a position closing said bottom outlet to an open position out of vertical alignment with said outlet permitting free gravity drop of molten materials directly from the outlet of the crucible.
Claim 3
Dependent Claim
20 words
The structure in claim 1, and the bottom wall of said crucible increasing in thickness radially outwardly from the outlet.
Claim 4
Dependent Claim
25 words
The structure in claim 1, and said gate having a convex surface conforming to the curvature of the concave bottom face of said bottom wall.
Claim 5
Dependent Claim
30 words
The structure in claim 3, and said gate comprising a pair of jaws movable toward each other to a closed position and away from each other to an open position.
Claim 6
Dependent Claim
27 words
The structure in claim 4, and means connected to said gate jaws to actuate the same, said means including means biasing said jaws to a closed position.
Claim 7
Dependent Claim
51 words
The structure in claim 1, said crucible outlet being located at the apex of said concave bottom face, and said gate having a convex surface conforming in curvature to the concave bottom face of the bottom wall of the crucible, and said mold positioned directly beneath said gate and said outlet.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |