US4390170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closure plug for ladle car
Assignee: Eltech Systems Corp
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Filing: 1982-03-19
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Granted: 1983-06-28
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Expires: 2002-03-19
Abstract
Abstract A ladle car opening is closed during the period between pouring and subsequent refilling of the car with molten metal by a closure plug comprised of an open wire mesh support and a lining of fibrous insulating material attached thereto. The plug has a tapered configuration providing for the outer end thereof to be larger than the opening into the ladle car, and the wire mesh support and lining provides for the plug to be flexible so as to conform to the peripheral contour of the opening and to engage a peripheral outer edge of the opening to close the opening and retain the plug therein.
Inventors
- 👤 Louis B. Schaefer, IV
- 👤 Thomas M. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:49
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/06; B; B22; B22D; B22D41/00; B22D41/12
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
116 words
A closure plug for a ladle car container having an opening thereinto through which molten metal is poured into and from the container and which container opening has an axially outer end and a peripheral edge at said outer end, said closure plug having an axis and including wall means providing said plug with an open axially outer end and a closed axially inner end, said wall means comprising lining means of fibrous insulating material and flexible support means for lining said means, said support means being open mesh screen means, said plug being received in and closing said container opening with said closed inner end spaced axially inwardly of said peripheral edge of said opening.
Claim 2
Dependent Claim
116 words
A closure plug for a ladle car container having an opening thereinto through which molten metal is poured into and from the container and which container opening has an axially outer end and a peripheral edge at said outer end, said closure plug having an axis and including wall means providing said plug with an open axially outer end and a closed axially inner end, said wall means comprising lining means of fibrous insulating material and flexible support means for lining said means, said support means being open mesh screen means, said plug being received in and closing said container opening with said closed inner end spaced axially inwardly of said peripheral edge of said opening.
Claim 3
Dependent Claim
34 words
A closure plug according to claim 1, wherein said wall means tapers radially inwardly of said plug axis in the direction from said axially outer end toward said axially inner end of said plug.
Claim 4
Dependent Claim
31 words
A closure plug according to claim 1, wherein said axially outer end of said plug includes a peripheral plug edge spaced radially outwardly of said peripheral edge of said container opening.
Claim 5
Dependent Claim
28 words
A closure plug according to claim 1, wherein said wall means includes a portion adjacent said axially outer end engaging against said peripheral edge of said container opening.
Claim 6
Dependent Claim
54 words
A closure plug according to claim 4, wherein said axially outer end of said plug includes a peripheral plug edge spaced axially outwardly of said portion of said wall means, and said wall means tapers radially inwardly of said plug axis from said peripheral plug edge toward said axially inner end of said plug.
Claim 7
Dependent Claim
28 words
A closure plug according to claim 5, wherein said wall means tapers from said peripheral plug edge to said plug axis at said inner end of said plug.
Claim 8
Dependent Claim
24 words
A closure plug according to claim 1, and handle means extending across said open end of said plug and fastened to said support means.
Claim 9
Dependent Claim
39 words
A closure plug according to claim 1, wherein said open axially outer end of said plug includes a peripheral plug edge, and plug support means fastened to said support means and extending radially outwardly of said peripheral plug edge.
Claim 10
Dependent Claim
40 words
A closure plug according to claim 1, wherein said support means has an outer peripheral edge at said open outer end, and said lining means includes a peripheral skirt portion radially outwardly of said peripheral edge of said support means.
Claim 11
Dependent Claim
36 words
A closure plug according to claim 1, wherein said wall means has inner and outer sides, said outer side being defined by said flexible support means, and said inner side being defined by said lining means.
Claim 12
Dependent Claim
24 words
A closure plug according to claim 10, wherein said lining means includes mat means of fibrous insulating material attached to said flexible support means.
Claim 13
Dependent Claim
17 words
A closure plug according to claim 11, wherein said open mesh screen means is wire screen means.
Claim 14
Dependent Claim
28 words
A closure plug according to claim 10, wherein said wall means includes a portion adjacent said axially outer end engaging against said peripheral edge of said container opening.
Claim 15
Dependent Claim
54 words
A closure plug according to claim 13, wherein said axially outer end of said plug includes a peripheral plug edge spaced axially outwardly of said portion of said wall means, and said wall means tapers radially inwardly of said plug axis from said peripheral plug edge toward said axially inner end of said plug.
Claim 16
Dependent Claim
24 words
A closure plug according to claim 14, wherein said lining means includes mat means of fibrous insulating material attached to said flexible support means.
Claim 17
Dependent Claim
17 words
A closure plug according to claim 15, wherein said open mesh screen means is wire screen means.
Claim 18
Dependent Claim
40 words
A closure plug according to claim 16, wherein said support means has an outer peripheral edge at said open outer end, and said lining means includes a peripheral skirt portion radially outwardly of said peripheral edge of said support means.
Claim 19
Dependent Claim
24 words
A closure plug according to claim 17, and handle means extending across said open end of said plug and fastened to said support means.
Claim 20
Dependent Claim
28 words
A closure plug according to claim 18, wherein said wall means tapers from said peripheral plug edge to said plug axis at said inner end of said plug.
Claim 21
Dependent Claim
26 words
A closure plug according to claim 16, and plug support means fastened to said wire screen means and extending radially outwardly of said peripheral plug edge.
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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) | 1986-06-27 | 1986-12-27 | 1987-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-27 | 1990-12-27 | 1991-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-27 | 1994-12-27 | 1995-06-28 | $7700.00 | Window Closed / Lapsed |