Patent US3563523A successfully refreshed from Google Patents.
US3563523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lining apparatus
Assignee: Dravo Corp
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Filing: 1968-08-26
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Granted: 1971-02-16
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Expires: 1988-08-26
Abstract
Abstract An apparatus for relining metallurgical furnace tap-holes is disclosed. The apparatus is adapted to be inserted in a furnace tap-hole and includes a tubular housing, a supply hopper communicating with the housing for introducing a lining material into the housing and a screw conveyor for advancing the lining material from the hopper forwardly through the housing. The forward end of the housing is closed by a nose piece and the housing has openings around its periphery to the rear of the nose piece. A discharge member is provided within the housing between the forward end of the screw conveyor and the nose piece and generally in the transverse plane of the openings for forcing material radially through the openings. Means are provided for driving the screw conveyor and simultaneously imparting a vibratory motion to the housing so that as lining material is discharged through the openings, the housing''s outer wall compacts the lining material against the inner wall of the taphole.
Inventors
- 👤 John S Wendt Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:43
CPC Classifications
C; C21; C21B; C21B7/00; C21B7/04; C21B7/06; F; F27; F27D; F27D3/00; F27D3/15; F27D3/1509; F27D3/1527; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53796; Y10T29/53848; Y10T29/53857; Y10T29/53878; Y10T29/53883
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
123 words
Apparatus for applying a lining of material to the interior of an object comprising: a. an elongated tubular housing having a closed forward end, a rearward end and at least one opening adjacent its forward end for the discharge of a lining material therethrough, said housing having an outer shape generally conforming to but smaller than the interior of the object to be lined by an amount generally equal to the thickness of the lining to be formed; b. rotatable feed means mounted within the housing for advancing a lining material therethrough; c. discharge means within the housing for discharging lining material through the opening; and d. means for simultaneously driving the feed means and imparting a vibrating action to the tubular housing.
Claim 2
Dependent Claim
123 words
Apparatus for applying a lining of material to the interior of an object comprising: a. an elongated tubular housing having a closed forward end, a rearward end and at least one opening adjacent its forward end for the discharge of a lining material therethrough, said housing having an outer shape generally conforming to but smaller than the interior of the object to be lined by an amount generally equal to the thickness of the lining to be formed; b. rotatable feed means mounted within the housing for advancing a lining material therethrough; c. discharge means within the housing for discharging lining material through the opening; and d. means for simultaneously driving the feed means and imparting a vibrating action to the tubular housing.
Claim 3
Dependent Claim
46 words
Apparatus as defined in claim 1 wherein the feed means comprises a shaft mounted within the housing having a screw conveyor mounted thereon and the discharge means comprises an elongated body member eccentrically mounted on the shaft forwardly of the discharge end of the screw conveyor.
Claim 4
Dependent Claim
41 words
Apparatus as defined in claim 2 wherein the screw conveyor has a single helical flight of uniform pitch for a substantial portion of the length of the conveyor and of a progressively lesser pitch towards the discharge end of the conveyor.
Claim 5
Dependent Claim
76 words
Apparatus as defined in claim 2 wherein the elongated body member has first and second sections, the first section comprising a substantially cylindrical portion having forward and rear ends and the second section comprising a frustoconical portion integrally formed on the rear end of the cylindrical portion with the frustoconical portion being coaxial with the cylindrical portion and with the large diameter end of the frustoconical portion being adjacent the rear end of the cylindrical portion.
Claim 6
Dependent Claim
161 words
Apparatus for relining furnace tap-holes comprising: a. an elongated tubular housing having a closed forward end, a rearward end and at least one opening in its periphery adjacent the forward end thereof for the discharge of a lining material therethrough, said housing having an outer shaped generally conforming to but smaller than the tap-hole to be lined by an amount generally equal to the thickness of the lining to be formed; b. a supply hopper communicating with the housing for introducing lining material into the housing; c. a rotatable shaft mounted within the housing and having a screw conveyor mounted thereon for advancing the lining material from the hopper through the housing; d. a discharge means mounted on the shaft forwardly of the discharge end of the screw conveyor and generally in the transverse plane of the opening of the housing for forcing material radially through the opening; and e. drive means operatively connected to the shaft for rotating the shaft.
Claim 7
Dependent Claim
161 words
Apparatus for relining furnace tap-holes comprising: a. an elongated tubular housing having a closed forward end, a rearward end and at least one opening in its periphery adjacent the forward end thereof for the discharge of a lining material therethrough, said housing having an outer shaped generally conforming to but smaller than the tap-hole to be lined by an amount generally equal to the thickness of the lining to be formed; b. a supply hopper communicating with the housing for introducing lining material into the housing; c. a rotatable shaft mounted within the housing and having a screw conveyor mounted thereon for advancing the lining material from the hopper through the housing; d. a discharge means mounted on the shaft forwardly of the discharge end of the screw conveyor and generally in the transverse plane of the opening of the housing for forcing material radially through the opening; and e. drive means operatively connected to the shaft for rotating the shaft.
Claim 8
Dependent Claim
26 words
Apparatus for relining furnace tap-holes as defined in claim 5 wherein the drive means rotates the shaft and simultaneously imparts a vibratory motion to the housing.
Claim 9
Dependent Claim
34 words
Apparatus for relining furnace tap-holes as defined in claim 5 wherein the screw conveyor has a uniform pitch for a substantial portion of its length and a progressively lesser pitch toward its discharge end.
Claim 10
Dependent Claim
177 words
Apparatus for relining furnace tap-holes comprising: a. a supply hopper for a lining material used in lining tap-holes; b. an elongated tubular housing below and communicating with the hopper, said housing having an outer shape generally conforming to but smaller than the tap-hole to be lined by an amount generally equal to the thickness of the lining to be formed; c. closure means for closing the front end of the housing the housing having at least one opening in its periphery rearwardly of the closure means for the discharge of a lining material therethrough; d. a rotatable shaft having a screw conveyor mounted thereon supported at its forward end by the closure means, the screw conveyor extending under the hopper; e. discharge means mounted on the shaft between the forward end of the screw conveyor and the closure and confronting the opening of the housing for forcing lining material radially through the opening; and f. drive means operatively connected to the shaft for rotating the shaft to advance lining material from the hopper towards the discharge means.
Claim 11
Dependent Claim
177 words
Apparatus for relining furnace tap-holes comprising: a. a supply hopper for a lining material used in lining tap-holes; b. an elongated tubular housing below and communicating with the hopper, said housing having an outer shape generally conforming to but smaller than the tap-hole to be lined by an amount generally equal to the thickness of the lining to be formed; c. closure means for closing the front end of the housing the housing having at least one opening in its periphery rearwardly of the closure means for the discharge of a lining material therethrough; d. a rotatable shaft having a screw conveyor mounted thereon supported at its forward end by the closure means, the screw conveyor extending under the hopper; e. discharge means mounted on the shaft between the forward end of the screw conveyor and the closure and confronting the opening of the housing for forcing lining material radially through the opening; and f. drive means operatively connected to the shaft for rotating the shaft to advance lining material from the hopper towards the discharge means.
Claim 12
Dependent Claim
27 words
Apparatus for relining furnace tap-holes as defined in claim 8 wherein the drive means rotates the shaft and simultaneously imparts a vibrating action to the tubular housing.
Claim 13
Dependent Claim
114 words
Apparatus for relining furnace tap-holes as defined in claim 8 wherein the discharge means comprising a body member having a substantially cylindrical portion with forward and rear ends and a frustoconical portion coaxial with the cylindrical portion and with the large diameter end of the frustoconical portion being integrally formed on the rear end of the cylindrical portion, the body member having a bore extending through both portions with the axis of the bore being parallel and spaced from the axis of the body member, the shaft passing through the bore such that the body member is eccentrically mounted thereon forwardly of the discharge end of the conveyor and rearwardly of the closure means.
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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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |