US3884291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for production of castings from alloys of metals and gases
Assignee: Institute of Metal Science, Equipment and Technologies
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Filing: 1969-10-02
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Granted: 1975-05-20
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Expires: 1989-10-02
Abstract
Abstract A reservoir for molten metal is disposed in a first, hermetically closed chamber, in which an atmosphere under pressure is created by the gas to be dissolved in the metal. A compression casting cylinder is provided, such cylinder being connected with the mould, which is disposed in a second chamber. By means of a system of pipes and valve the second chamber may selectively be connected to the first chamber and to a source of gas under pressure.
Inventors
- 👤 Angel Tontchev Balevski
- 👤 Ivan Dimov Nikolov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:31
CPC Classifications
B; B22; B22D; B22D18/00; B22D18/04; F; F27; F27B; F27B5/00; F27B5/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
96 words
APPARATUS FOR THE PRODUCTION OF ALLOYS OF METALS AND GASES, COMPRISING A FIRST, HERMETICALLY CLOSED CHAMBER, A RESERVOIR FOR MOLTEN METAL DISPOSED IN SAID FIRST CHAMBER, MEANS FOR CREATING IN SAID FIRST CHAMBER AN ATMOSPHERE UNDER PRESSURE OF THE GAS TO BE DISSOLVED IN THE METAL, A SECOND CHAMBER, A MOULD TO BE CHARGED WITH MOLTEN METAL FROM SAID RESERVOIR DISPOSED IN THE SECOND CHAMBER, MEANS FOR INJECTING THE MOLTEN METAL INTO THE MOULD, AND CONDUIT MEANS FOR SELECTIVELY CONNECTING THE SECOND CHAMBER TO THE FIRST CHAMBER AND TO THE MEANS FOR CREATING GAS UNDER PRESSURE.
Claim 2
Dependent Claim
96 words
APPARATUS FOR THE PRODUCTION OF ALLOYS OF METALS AND GASES, COMPRISING A FIRST, HERMETICALLY CLOSED CHAMBER, A RESERVOIR FOR MOLTEN METAL DISPOSED IN SAID FIRST CHAMBER, MEANS FOR CREATING IN SAID FIRST CHAMBER AN ATMOSPHERE UNDER PRESSURE OF THE GAS TO BE DISSOLVED IN THE METAL, A SECOND CHAMBER, A MOULD TO BE CHARGED WITH MOLTEN METAL FROM SAID RESERVOIR DISPOSED IN THE SECOND CHAMBER, MEANS FOR INJECTING THE MOLTEN METAL INTO THE MOULD, AND CONDUIT MEANS FOR SELECTIVELY CONNECTING THE SECOND CHAMBER TO THE FIRST CHAMBER AND TO THE MEANS FOR CREATING GAS UNDER PRESSURE.
Claim 3
Dependent Claim
80 words
An apparatus for production of castings according to claim 1, wherein a cavity is provided in the upper part of the mould, said cavity protruding outside the contours of the metal part to be cast and resembling a feeder head in shape, said cavity being sealed against the mould in such a way that the whole quantity or a part of the gas contained in the mould is compressed in said cavity when the mould is filled with molten metal.
Claim 4
Dependent Claim
29 words
An apparatus for production of castings according to claim 2, comprising a gas compression device including a cylinder with a piston communicating with the interior of the second chamber.
References Cited (Backward Citations)
US2181157A
Cited
US2195360A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |