US3554270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal casing apparatus and method
Assignee: Erico International Corp
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Filing: 1967-07-24
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Granted: 1971-01-12
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Expires: 1987-07-24
Abstract
Abstract Thermite casting apparatus particularly for joining reinforcing bar including a sleeve mold surrounding the bar ends into which metal is cast and having a generally central tap hold of a predetermined size; a crucible and pouring basin for introducing the cast metal into such sleeve, the latter including a disposable ceramic sleeve insert snugly fitted in the exit end of the pouring basin passage to maintain the exit aperture thereof in proper correspondence to the tap hole in the sleeve.
Inventors
- 👤 Leonard Gelfand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:55
CPC Classifications
B; B22; B22D; B22D19/00; B22D19/04
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
61 words
In combination, a graphite pouring basin and a mole having a predetermined size of tap hole therein, and a disposable insert in said pouring basin operative to maintain the exit aperture thereof in substantial correspondence with the tap hole in said mold, said insert comprising a ceramic sleeve operative to the funnel the molten metal passing through said pouring basin therethrough.
Claim 2
Dependent Claim
61 words
In combination, a graphite pouring basin and a mole having a predetermined size of tap hole therein, and a disposable insert in said pouring basin operative to maintain the exit aperture thereof in substantial correspondence with the tap hole in said mold, said insert comprising a ceramic sleeve operative to the funnel the molten metal passing through said pouring basin therethrough.
Claim 3
Dependent Claim
91 words
In combination, a graphite pouring basin and a mold have a predetermined size of tap hole therein, and a disposable insert in said pouring basin operative to maintain the exit aperture thereof in substantial correspondence with the tap hole in said mold, a crucible mounted on said pouring basin operative to provide a charge of molten metal, said mold comprising an elongated steel sleeve with the tap hole therein generally centrally located, and a guide tube projecting from the tap hole in said sleeve and closely fitting within said disposable insert.
Claim 4
Dependent Claim
91 words
In combination, a graphite pouring basin and a mold have a predetermined size of tap hole therein, and a disposable insert in said pouring basin operative to maintain the exit aperture thereof in substantial correspondence with the tap hole in said mold, a crucible mounted on said pouring basin operative to provide a charge of molten metal, said mold comprising an elongated steel sleeve with the tap hole therein generally centrally located, and a guide tube projecting from the tap hole in said sleeve and closely fitting within said disposable insert.
Claim 5
Dependent Claim
47 words
In combination, a graphite pouring basin and a mold having a predetermined size of tap hole therein, and a nonmetallic disposable refactory insert in said pouring basin operative to maintain the exit aperture thereof in substantial size and pouring correspondence with the tap hole in said mold.
Claim 6
Dependent Claim
47 words
In combination, a graphite pouring basin and a mold having a predetermined size of tap hole therein, and a nonmetallic disposable refactory insert in said pouring basin operative to maintain the exit aperture thereof in substantial size and pouring correspondence with the tap hole in said mold.
Claim 7
Dependent Claim
26 words
The combination set forth in claim 1 wherein the I.D. of said ceramic sleeve corresponds generally to the I.D. of the tap hole in said mold.
Claim 8
Dependent Claim
28 words
The combination set forth in claim 4 including a guide tube within said ceramic sleeve projecting into the tap hole in said mold operative to align the same.
Claim 9
Dependent Claim
23 words
The combination set forth in claim 3 including a crucible mounted on said pouring basin operative to provide a charge of molten metal.
Claim 10
Dependent Claim
24 words
The combination set forth in claim 6 wherein said mold comprises an elongated steel sleeve and the tap hole therein is generally centrally located.
Claim 11
Dependent Claim
32 words
The combination set forth in claim 1 wherein said pouring basin includes a generally vertically extending passage therethrough with said disposable insert being snugly fitted within said passage at the bottom thereof.
Claim 12
Dependent Claim
45 words
The combination set forth in claim 1 wherein said pouring basin includes an inclined passage terminating in a horizontal passage of larger internal diameter than said inclined passage, said horizontal passage being of predetermined depth, and said disposable insert being inserted in said horizontal passage.
Claim 13
Independent Claim
87 words
A method of joining reinforcing bar and the like comprising the steps of enclosing the ends of such bar with a sleeve having a tap hole therein of predetermined size, placing a low melting point metal guide tube in such tap hole and surrounding such tube with a nonmetallic disposable refractory insert fitted within a graphite pouring basin, and funnelling a castable molten metal through such insert thereby to maintain the exit aperture adjacent such sleeve at substantially the size of the tap hole in such sleeve.
Claim 14
Independent Claim
87 words
A method of joining reinforcing bar and the like comprising the steps of enclosing the ends of such bar with a sleeve having a tap hole therein of predetermined size, placing a low melting point metal guide tube in such tap hole and surrounding such tube with a nonmetallic disposable refractory insert fitted within a graphite pouring basin, and funnelling a castable molten metal through such insert thereby to maintain the exit aperture adjacent such sleeve at substantially the size of the tap hole in such sleeve.
Claim 15
Dependent Claim
26 words
A method as set forth in claim 10 wherein such disposable insert comprises an annular ceramic sleeve fitted closely within the passage through such pouring basin.
References Cited (Backward Citations)
US1300723A
Cited
US1607118A
Cited
US1677979A
Cited
US1838357A
Cited
US3234603A
Cited
US3255498A
Cited
FR1327977A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |