Patent US4027719A successfully refreshed from Google Patents.
US4027719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Argon bath induction casting system
Assignee: Ultratek International Corp
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Filing: 1976-03-24
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Granted: 1977-06-07
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Expires: 1996-03-24
Abstract
Abstract A system for centrifugal casting of induction melted metal includes a crucible and a porous mold secured to a casting arm. The casting arm is secured to a hollow rotatable shaft which includes two separate fluid channels extending axially therethrough. The shaft is supported on a rotary valve which provides separate flow communication with each flow channel. One flow channel provides pressurized argon to the crucible to prevent oxide formation during casting. The other channel provides a vacuum to the exterior of the mold to draw gasses out of the metal, aid in the argon flow into the mold, and to augment the centrifugal flow of the molten metal into the mold.
Inventors
- 👤 Willy Strempel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:23
CPC Classifications
B; B22; B22D; B22D13/00; B22D13/06; B22D13/063
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
100 words
A method of metal casting, comprising the steps of providing a crucible secured to a centrifuge arm, and a metal flow channel extending therefrom to a porous mold spaced radially outwardly therefrom, supplying an inert gas to said crucible, applying a continuous vacuum to the exterior distal portions of said porous mold to draw said inert gas through said channel and said mold, heating a metal charge to a molten state in the inert gas bath in said crucible, and rotating said centrifuge arm to drive said metal into said mold, said vacuum removing any gas from the molten metal.
Claim 2
Independent Claim
100 words
A method of metal casting, comprising the steps of providing a crucible secured to a centrifuge arm, and a metal flow channel extending therefrom to a porous mold spaced radially outwardly therefrom, supplying an inert gas to said crucible, applying a continuous vacuum to the exterior distal portions of said porous mold to draw said inert gas through said channel and said mold, heating a metal charge to a molten state in the inert gas bath in said crucible, and rotating said centrifuge arm to drive said metal into said mold, said vacuum removing any gas from the molten metal.
Claim 3
Dependent Claim
29 words
The method of claim 1, wherein said step of heating said metal charge includes disposing an induction coil about said crucible and applying radio frequency energy to said coil.
Claim 4
Independent Claim
86 words
An apparatus for metal casting, comprising a centrifuge arm, a crucible secured to said arm, a porous mold secured to said arm and spaced radially outwardly from said crucible, a closed metal flow channel extending between said crucible and said mold, rotating means for rotating said centrifuge arm at high speed, gas delivery means for supplying an inert pressurized gas to said crucible, said metal flow channel, and said mold, and vacuum means for continuously applying a vacuum to the exterior distal portions of said mold.
Claim 5
Independent Claim
86 words
An apparatus for metal casting, comprising a centrifuge arm, a crucible secured to said arm, a porous mold secured to said arm and spaced radially outwardly from said crucible, a closed metal flow channel extending between said crucible and said mold, rotating means for rotating said centrifuge arm at high speed, gas delivery means for supplying an inert pressurized gas to said crucible, said metal flow channel, and said mold, and vacuum means for continuously applying a vacuum to the exterior distal portions of said mold.
Claim 6
Dependent Claim
17 words
The apparatus of claim 3, wherein said rotating means includes a shaft secured to said centrifuge arm.
Claim 7
Dependent Claim
30 words
The apparatus of claim 4, wherein said gas delivery means and said vacuum means includes separate, sealed fluid channels extending through said shaft to said crucible and said mold, respectively.
Claim 8
Dependent Claim
26 words
The apparatus of claim 5, further including a rotary valve supporting said shaft, said valve including means for providing separate flow communication to said fluid channels.
Claim 9
Independent Claim
120 words
An apparatus for metal casting, comprising a centrifuge arm, a crucible secured to said arm, a porous mold secured to said arm and spaced radially outwardly from said crucible, a closed metal flow channel extending between said crucible and said mold, rotating means for rotating said centrifuge arm at high speed, gas delivery means for supplying an inert pressurized gas to said crucible, said metal flow channel, and said mold, and vacuum means for continuously applying a vacuum to the exterior distal portions of said mold, said rotating means including a rotary valve for supplying said gas delivery means and said vacuum means, and said rotary valve including a arbor having a pair of concentric flow passages extending axially therein.
Claim 10
Independent Claim
120 words
An apparatus for metal casting, comprising a centrifuge arm, a crucible secured to said arm, a porous mold secured to said arm and spaced radially outwardly from said crucible, a closed metal flow channel extending between said crucible and said mold, rotating means for rotating said centrifuge arm at high speed, gas delivery means for supplying an inert pressurized gas to said crucible, said metal flow channel, and said mold, and vacuum means for continuously applying a vacuum to the exterior distal portions of said mold, said rotating means including a rotary valve for supplying said gas delivery means and said vacuum means, and said rotary valve including a arbor having a pair of concentric flow passages extending axially therein.
Claim 11
Dependent Claim
29 words
The apparatus of claim 7, further including a housing disposed about said arbor, said housing including a pair of ports, each port communicating with one of said flow passages.
Claim 12
Dependent Claim
29 words
The apparatus of claim 8, wherein said arbor extends through a hole in said housing, and further including a plurality of bearings disposed between said housing and said arbor.
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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) | 1980-06-06 | 1980-12-06 | 1981-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-06 | 1984-12-06 | 1985-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-06 | 1988-12-06 | 1989-06-07 | $7700.00 | Window Closed / Lapsed |