US3618925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable closure for outlets in receptacles for molten metal or the like
Assignee: Institut de Recherches de la Siderurgie Francaise IRSID
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Filing: 1970-02-13
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Granted: 1971-11-09
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Expires: 1990-02-13
Abstract
Abstract A closure for outlets in receptacles for molten metal wherein a frame having sides which form a regular polygon accommodates a set of coplanar vanes, one for each side of the frame. The vanes comprise identical triangular portions bounded by edge faces each of which abuts against one edge face of the adjoining vane. The apices of all triangular portions abut against each other in outlet-closing positions of the vanes, and the vanes are movable from such closing positions along the respective sides of the frame, in the same direction and through identical distances, whereby their triangular portions define a polygonal passage for outflow of molten metal. The center of such passage coincides with the center of the frame.
Inventors
- 👤 Bernard Girolami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:42
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/14; B22D41/22; B22D41/24
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
146 words
For use with a receptacle having an outlet for flowable material, particularly with a receptacle for molten metal, a closure for said outlet including at least three adjoining vanes located in a common plane and each having a triangular portion bounded by two edge faces meeting at an apex and making an angle of 360*/n wherein n is the number of said vanes, each edge face of each of said portions abutting against an edge face of the adjoining portion and said vanes being movable in said plane unidirectionally through equal distances at right angles to the lines dividing the respective first mentioned angles between an outlet closing position in which the apices of said portions are adjacent to each other and a plurality of open positions in each of which said portions define a polygonal passage of different cross-sectional area in registry with said outlet.
Claim 2
Dependent Claim
146 words
For use with a receptacle having an outlet for flowable material, particularly with a receptacle for molten metal, a closure for said outlet including at least three adjoining vanes located in a common plane and each having a triangular portion bounded by two edge faces meeting at an apex and making an angle of 360*/n wherein n is the number of said vanes, each edge face of each of said portions abutting against an edge face of the adjoining portion and said vanes being movable in said plane unidirectionally through equal distances at right angles to the lines dividing the respective first mentioned angles between an outlet closing position in which the apices of said portions are adjacent to each other and a plurality of open positions in each of which said portions define a polygonal passage of different cross-sectional area in registry with said outlet.
Claim 3
Dependent Claim
148 words
For use with a receptacle having an outlet for flowable material, particularly with a receptacle for molten metal, a closure for said outlet including at least three adjoining vanes located in a common plane and each having an isosceles triangular portion bounded by two edge faces meeting at an apex and making an angle of 360*/n wherein n is the number of said vanes, each edge face of each of said portions abutting against an edge face of the adjoining portion and said vanes being movable in said plane unidirectionally through equal distances at right angles to the lines dividing the respective first mentioned angles between an outlet closing position in which the apices of said portions are adjacent to each other and a plurality of open positions in each of which said portions define a regular polygonal passage of different cross-sectional area in registry with said outlet.
Claim 4
Dependent Claim
148 words
For use with a receptacle having an outlet for flowable material, particularly with a receptacle for molten metal, a closure for said outlet including at least three adjoining vanes located in a common plane and each having an isosceles triangular portion bounded by two edge faces meeting at an apex and making an angle of 360*/n wherein n is the number of said vanes, each edge face of each of said portions abutting against an edge face of the adjoining portion and said vanes being movable in said plane unidirectionally through equal distances at right angles to the lines dividing the respective first mentioned angles between an outlet closing position in which the apices of said portions are adjacent to each other and a plurality of open positions in each of which said portions define a regular polygonal passage of different cross-sectional area in registry with said outlet.
Claim 5
Dependent Claim
22 words
A closure as defined in claim 1, wherein at least said triangular portion of each of said vanes consists of refractory material.
Claim 6
Dependent Claim
22 words
A closure as defined in claim 1, wherein at least said triangular portion of each of said vanes consists of metallic material.
Claim 7
Dependent Claim
49 words
A closure as defined in claim 1, further comprising a plurality of elongated guide means extending along the sides of an n-sided regular polygon, said vanes being located within the area bounded by said guide means and each including a second portion reciprocable along one of said guide means.
Claim 8
Dependent Claim
32 words
A closure as defined in claim 1, wherein the point where said apices abut against each other in the outlet closing positions of said vanes coincides with the center of said polygon.
Claim 9
Dependent Claim
40 words
A closure as defined in claim 6, wherein at least one of said guide means is movable with reference to the other guide means and further comprising means for biasing said one guide means toward the center of said polygon.
Claim 10
Dependent Claim
23 words
A closure as defined in claim 5, further comprising means for moving the second portions of said vanes along the respective guide means.
Claim 11
Dependent Claim
21 words
A closure as defined in claim 8, wherein each of said second portions constitutes a carriage for the respective triangular portion.
Claim 12
Dependent Claim
24 words
A closure as defined in claim 8, wherein said means for moving said second portions comprises means for synchronizing the movements of said vanes.
Claim 13
Dependent Claim
46 words
A closure as defined in claim 8, wherein said means for moving said second portions comprises a fluid-operated cylinder for each of said vanes and means for regulating the admission and evacuation of fluid from said cylinders to effect movements of said vanes through identical distances.
Claim 14
Dependent Claim
44 words
A closure as defined in claim 8, wherein said means for moving said second portions includes a mechanical connection between said vanes insuring movement of all vanes in the same direction and through the same distance in response to movement of any given vane.
Claim 15
Dependent Claim
16 words
A closure as defined in claim 12, wherein said mechanical connection comprises an endless flexible element.
Claim 16
Dependent Claim
14 words
A closure as defined in claim 13, wherein said flexible element is a chain.
Claim 17
Dependent Claim
14 words
A closure as defined in claim 13, wherein said flexible element is a cable.
Claim 18
Dependent Claim
23 words
A closure as defined in claim 13, wherein each of said vanes comprises coupling means connecting the respective vane to said flexible element.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |