US3578065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mandrel holder for horizontal pipe casting apparatus
Assignee: KM Kabelmetal AG
•
Filing: 1969-08-28
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Granted: 1971-05-11
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Expires: 1989-08-28
Abstract
Abstract A holder for a mandrel mounted in a metal casting crucible to continuously form pipe; the casting operation being of the horizontal type and the holder accurately centering the mandrel in respect to the tube mold.
Inventors
- 👤 Reinhold Langer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:30
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/006; B22D11/04; B22D11/045; B22D11/047
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
129 words
In continuous horizontal pipe casting means, a crucible for holding molten metal and having an outlet in a sidewall portion thereof, a tube mold extending horizontally from said outlet, and a mandrel extending within said mold; the improvement comprising a mandrel holder for maintaining said mandrel in coaxial relation to said mold, said holder being mounted in said outlet and comprising a cup-shaped member having a cylindrical sidewall and a bottom wall, said bottom wall being disposed interiorly of said crucible and formed with an opening, said manDrel having a rear portion mounted in the opening in said bottom wall of the holder, and passages in wall portions of said holder for connecting the interior of said crucible with the annular space between said mandrel and said tube mold.
Claim 2
Dependent Claim
129 words
In continuous horizontal pipe casting means, a crucible for holding molten metal and having an outlet in a sidewall portion thereof, a tube mold extending horizontally from said outlet, and a mandrel extending within said mold; the improvement comprising a mandrel holder for maintaining said mandrel in coaxial relation to said mold, said holder being mounted in said outlet and comprising a cup-shaped member having a cylindrical sidewall and a bottom wall, said bottom wall being disposed interiorly of said crucible and formed with an opening, said manDrel having a rear portion mounted in the opening in said bottom wall of the holder, and passages in wall portions of said holder for connecting the interior of said crucible with the annular space between said mandrel and said tube mold.
Claim 3
Dependent Claim
25 words
In pipe casting means as in claim 1 wherein said passages are located at the juncture of the sidewall and bottom wall of said holder.
Claim 4
Dependent Claim
25 words
In a pipe casting means as in claim 2 wherein said passages are nonuniformly distributed about the periphery of the bottom wall of said holder.
Claim 5
Dependent Claim
21 words
In a pipe casting means as in claim 1 and further including coacting means for locking said mandrel to said holder.
Claim 6
Dependent Claim
29 words
In a pipe casting means as in claim 1 wherein the outer end mandrel portion is of tapering cross section, said mandrel end portion having an axial recess therein.
Claim 7
Dependent Claim
17 words
In a pipe casting means as in claim 1 wherein said mandrel is formed of ceramic material.
Claim 8
Dependent Claim
77 words
In a pipe casting means as in claim 1 wherein said mandrel comprises one end portion of uniform cross section and another end portion of tapering cross section, said one end portion having a flange at the outer end thereof, the one end portion of the mandrel being disposed in the bottom wall opening of said holder with the mandrel flange abutting marginal outer surface portions of the bottom wall of said holder at the opening therein.
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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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |