Patent US4941792A successfully refreshed from Google Patents.
US4941792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Handling device for a distribution chute of a shaft furnace and drive mechanism suitable for this device
Assignee: Paul Wurth SA
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Filing: 1989-07-19
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Granted: 1990-07-17
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Expires: 2009-07-19
Abstract
Abstract The present invention relates to a handling device for a distribution chute of a shaft furnace, the said distribution chute being suspended pivotably on a rotary cage mounted by means of bearings in a housing installed in the head of the furnace and containing drive means for rotating the said cage about the vertical axis of the furnace and drive means for pivoting the chute about its horizontal suspension axis. The invention also relates to a mechanism for driving the chute which is suitable for this device.
Inventors
- 👤 Giovanni Cimenti
- 👤 Emile Lonardi
- 👤 Pierre Mailliet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:30
CPC Classifications
C; C21; C21B; C21B7/00; C21B7/18; C21B7/20; F; F27; F27B; F27B1/00; F27B1/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
104 words
An apparatus for charging a shaft furnace, comprising: a platform adapted for mounting on the shaft furnace; an outer housing rigidly attached to the platform; an inner housing rotatably mounted within the outer housing, said inner housing having an axis of rotation; a distribution chute pivotably suspended from the inner housing; means for rotating the inner housing about the axis; means for pivoting the chute relative to the axis; and means for dismounting the chute, comprising: an inclined ramp mounted on the platform; a carriage slidably mounted on the ramp; means for accessing the chute; and means for fastening the carriage to the chute.
Claim 2
Independent Claim
104 words
An apparatus for charging a shaft furnace, comprising: a platform adapted for mounting on the shaft furnace; an outer housing rigidly attached to the platform; an inner housing rotatably mounted within the outer housing, said inner housing having an axis of rotation; a distribution chute pivotably suspended from the inner housing; means for rotating the inner housing about the axis; means for pivoting the chute relative to the axis; and means for dismounting the chute, comprising: an inclined ramp mounted on the platform; a carriage slidably mounted on the ramp; means for accessing the chute; and means for fastening the carriage to the chute.
Claim 3
Dependent Claim
54 words
The apparatus of claim 1, wherein: the ramp has a top end and a bottom end; the carriage rides on track rollers; and the apparatus further comprises: guide pulleys mounted at the ends of the ramp; a cable attached to the carriage and travelling around the guide pulleys; and means for driving the cable.
Claim 4
Dependent Claim
40 words
The apparatus of claim 1, wherein: the chute has a top end and a bottom end; and the means for fastening the chute to the carriage comprises a sliding hammer head rod which engages the top end of the chute.
Claim 5
Dependent Claim
70 words
The apparatus of claim 1, wherein: the chute pivots about a horizontal suspension axle; the means for driving the inner housing comprises a first rolling ring between the inner housing and the outer housing; and the means for driving the chute comprises: a second rolling ring; a pair of arms extending from the suspension axle of the chute; and an articulated linkage connecting the second rolling ring to the arms.
Claim 6
Dependent Claim
83 words
The apparatus of claim 4, further comprising a pivoting lever mounted on the inner housing, the lever having a first end and a second end; and an articulated link between the second end of the pivoting lever and the second ceiling ring; and wherein: the articulated linkage comprises a forked element, the forked element having a base and two tines, the base being articulated with the first end of the pivoting lever, each of the tines is articulated with one of the arms.
Claim 7
Dependent Claim
69 words
The apparatus of claim 4, further comprising: a pivoting lever mounted on the inner housing, said lever having a base and two branches; and a cross member extending between the two branches; wherein the articulated linkage comprises a forked element, the forked element having a base and two tines, the base being connected with the cross member, and each of the tines being articulated with one of the arms.
Claim 8
Dependent Claim
35 words
The apparatus of claim 4, further comprising: a toothed quadrant mounted on the suspension axle of the chute; and a toothed section on the second rolling ring, said toothed section articulating with the toothed quadrant.
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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) | 1993-07-16 | 1994-01-15 | 1994-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-16 | 1998-01-15 | 1998-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-16 | 2002-01-15 | 2002-07-17 | $7700.00 | Window Closed / Lapsed |