US3921866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Angularly movable obturator, particularly for controlling molten metal flow from containers or ladles
Assignee: Individual
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Filing: 1974-06-05
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Granted: 1975-11-25
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Expires: 1994-06-05
Abstract
Abstract An obturator including a fixed support having a pouring channel, and a fan-shaped member pivoted eccentrically for movement in a horizontal plane with respect to the support. The member has a funnel-shaped appendix carrying a pouring bushing. The member is formed with a toothed sector, and a rack engages the sector and moves the member so as to bring the hole in the bushing into and out of registry with the pouring channel. The member and its pivot pin are resiliently biased to provide a pressure between the mutually sliding surfaces of the fixed support and the bushing.
Inventors
- 👤 Ferdinando Palazzo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:10
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/14; B22D41/22; B22D41/26
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
213 words
An obturator for controlling the flow of molten metal through an opening in the bottom of a container for such metal, the obturator comprising: a. a support fixed with respect to the container, b. a plate having an aperture which can be brought into alignment with the opening in the container, to allow molten metal flow from the container, or alternatively moved out of alignment with the opening to terminate such flow, c. a vertical pivot pin horizontally spaced from said aperture and extending between said plate and support, said pin being slidably and rotatably accommodated in said support, said plate being pivotable about the axis of said pin, d. a cap beneath said plate and carried by said support, e. resilient means between said cap and pin urging said pin and plate toward said support, f. resilient means between said cap and a point on said plate which is on a side of the aperture in said plate opposite said pin, said resilient means urging said plate toward said support, and g. means for pivoting the latter about said pin between a position in which said aperture is aligned with the opening in the container and a position in which said aperture is out of alignment with the opening in the container.
Claim 2
Dependent Claim
213 words
An obturator for controlling the flow of molten metal through an opening in the bottom of a container for such metal, the obturator comprising: a. a support fixed with respect to the container, b. a plate having an aperture which can be brought into alignment with the opening in the container, to allow molten metal flow from the container, or alternatively moved out of alignment with the opening to terminate such flow, c. a vertical pivot pin horizontally spaced from said aperture and extending between said plate and support, said pin being slidably and rotatably accommodated in said support, said plate being pivotable about the axis of said pin, d. a cap beneath said plate and carried by said support, e. resilient means between said cap and pin urging said pin and plate toward said support, f. resilient means between said cap and a point on said plate which is on a side of the aperture in said plate opposite said pin, said resilient means urging said plate toward said support, and g. means for pivoting the latter about said pin between a position in which said aperture is aligned with the opening in the container and a position in which said aperture is out of alignment with the opening in the container.
Claim 3
Dependent Claim
52 words
An obturator according to claim 1 wherein said plate has a funnel-shaped appendage surrounding said aperture, and a refractory bushing supported within said appendage, said bushing carrying an upper surface adapted to slidably engage the lower surface of the container in the region surrounding the opening in the bottom of the container.
Claim 4
Dependent Claim
34 words
An obturator according to claim 2 including an opening in said cap through which said appendage projects, said opening being elongated in the general direction of movement of said plate about said pivot pin.
Claim 5
Dependent Claim
40 words
An obturator according to claim 2 including a refractory plate carried by said bushing, said refractory plate defining said upper surface, and said refractory plate being elongated in the general direction of movement of said plate about said pivot pin.
Claim 6
Dependent Claim
59 words
An obturator according to claim 4 including a bushing within the opening in the bottom of the container, and a plate carried by said bushing and defining a lower surface thereof, said lower surface slidably engaging said upper surface of said plate bushing, and said plates having holes which correspond in size to the ceNtral holes of said bushings.
Claim 7
Dependent Claim
65 words
An obturator according to claim 4 wherein said refractory plate has a through hole, said through hole being aligned with the opening in the bottom of the container in one position of said plate, and a portion of the upper surface of said refractory plate devoid of holes is aligned with the opening in the bottom of the container in another position of said plate.
Claim 8
Dependent Claim
30 words
An obturator according to claim 1 wherein said cap is pivotally mounted on said support for movement about a horizontal axis, and fastener means joining said cap to said support.
Claim 9
Dependent Claim
30 words
An obturator according to claim 1 including a thrust support between said resilient means (f) and said plate, and low friction means slidably supporting said plate on said thrust support.
Claim 10
Dependent Claim
20 words
An obturator according to claim 8 wherein said low friction means include balls between said thrust support and said plate.
Claim 11
Dependent Claim
23 words
An obturator according to claim 8 including means interconnecting said thrust support and said support whereby the former is supported by the latter.
Claim 12
Dependent Claim
30 words
An obturator according to claim 1 wherein said means (g) includes teeth carried by said plate at a point remote from said pivot pin, and an actuator engaging said teeth.
Claim 13
Dependent Claim
13 words
An obturator according to claim 11 wherein said actuator is a toothed rack.
Claim 14
Dependent Claim
13 words
An obturator according to claim 11 wherein said actuator is a worm screw.
Claim 15
Dependent Claim
28 words
An obturator according to claim 1 wherein said plate is circular and rotatable about its center, and teeth around the periphery of said plate for rotating said plate.
Claim 16
Dependent Claim
79 words
An obturator according to claim 1 wherein said plate is sector-shaped and assembled with a plurality of similar plates to form a circular assembled plate, the apertures of said plate being spaced apart around the center of said circular assembled plate, and means for rotating said circular assembled plate to successively bring each of said apertures into alignment with the opening in the container bottom or alternatively move each of said apertures out of alignment with the container opening.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |