Patent US4960125A successfully refreshed from Google Patents.
Patent US3652073A successfully refreshed from Google Patents.
US3652073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic ladling system for delivering molten metal from furnace to die casting machine
Assignee: GERITY SCHULTZ CORP
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Filing: 1969-10-01
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Granted: 1972-03-28
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Expires: 1989-10-01
Abstract
Abstract An automatic ladling system for a cold-chamber, low pressure type die casting machine and permanent molding machines including a housing which is adapted to be submerged in a reservoir of molten cast metal, and a dual piston pumping mechanism structured for synchronous actuation and located in the submerged housing, the first pumping device serving to pump a quantity of molten cast metal into the submerged housing, while the second pumping device is structured to pump molten cast metal from the housing through a gooseneck to the shot sleeve at the die cast injection chamber of a cold-chamber machine or directly into the casting mold in the case of low pressure or permanent molding.
Inventors
- 👤 Dong Sing Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:04
CPC Classifications
B; B22; B22D; B22D17/00; B22D17/20; B22D17/30
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
253 words
A system for delivering molten metal from a molten metal furnace to a casting machine comprising: a housing mounted within said furnace and adapted to be at least partially submerged below the normal level of the molten metal in the furnace, said housing comprising adjacent first, second, and third chambers; said first chamber having a larger volume than said third chamber; first inlet means in said housing disposed to be beneath the normal level of the molten metal in said furnace and providing communication between the molten metal and said first chamber; closed passageway means between and extending from the lower portion of said first chamber to the upper portion of said second chamber and providing communication between said first and second chambers, said passageway means having a substantially smaller volume than said first chamber; second inlet means in said third chamber disposed to be beneath the level of said passageway outlet into said second chamber and providing communication between said second and third chambers; outlet means in said housing providing communication between said third chamber and the casting machine; and pumping means in said first and third chambers, said pumping means being adapted to move vertically with simultaneous reciprocAl movement and the same vertical displacement; whereby molten metal can be pumped through said first and third chambers with each downward stroke of said pumping means, and said second chamber can be constantly maintained at full capacity with molten metal, and thereby effectively delivering molten metal from the furnace to the casting machine.
Claim 2
Independent Claim
253 words
A system for delivering molten metal from a molten metal furnace to a casting machine comprising: a housing mounted within said furnace and adapted to be at least partially submerged below the normal level of the molten metal in the furnace, said housing comprising adjacent first, second, and third chambers; said first chamber having a larger volume than said third chamber; first inlet means in said housing disposed to be beneath the normal level of the molten metal in said furnace and providing communication between the molten metal and said first chamber; closed passageway means between and extending from the lower portion of said first chamber to the upper portion of said second chamber and providing communication between said first and second chambers, said passageway means having a substantially smaller volume than said first chamber; second inlet means in said third chamber disposed to be beneath the level of said passageway outlet into said second chamber and providing communication between said second and third chambers; outlet means in said housing providing communication between said third chamber and the casting machine; and pumping means in said first and third chambers, said pumping means being adapted to move vertically with simultaneous reciprocAl movement and the same vertical displacement; whereby molten metal can be pumped through said first and third chambers with each downward stroke of said pumping means, and said second chamber can be constantly maintained at full capacity with molten metal, and thereby effectively delivering molten metal from the furnace to the casting machine.
Claim 3
Dependent Claim
25 words
The invention defined in claim 1 wherein said passageway outlet is disposed to be above the normal level of the molten metal in the furnace.
Claim 4
Dependent Claim
20 words
The invention defined in claim 1 wherein said pumping means consists of a piston in the first and third chambers.
Claim 5
Dependent Claim
23 words
The invention defined in claim 3 wherein said pumping means includes a pressure fluid motor for effecting simultaneous reciprocal movement of the pistons.
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) | 1975-03-28 | 1975-09-27 | 1976-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-28 | 1979-09-27 | 1980-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-28 | 1983-09-27 | 1984-03-28 | $7700.00 | Window Closed / Lapsed |