Patent US3864984A successfully refreshed from Google Patents.
US3864984A
Expired / Lapsed
US
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Control device for a distributor chute in a shaft furnace, particularly a blast furnace
Assignee: Paul Wurth SA
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Filing: 1973-10-05
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Granted: 1975-02-11
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Expires: 1993-10-05
Abstract
Abstract A control device for a distributor chute for raw material arranged in the top of a shaft furnace particularly a blast furnace, wherein the drive for rotating the chute is constructed seperately and independently from the drive for modifying the pitch angle of the chute.
Inventors
- 👤 Edouard Legille
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:05
CPC Classifications
C; C21; C21B; C21B7/00; C21B7/18; C21B7/20; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18616; Y10T74/19; Y10T74/19642; Y10T74/19698; Y10T74/19828
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
151 words
In a furnace, the furnace being provided with a material feed spout and a movable distribution chute arranged to receive material from the spout, an improved chute position control comprising; a rotary casing; means for causing rotation of said casing; means pivotally connecting the first end of the distribution chute to said casing; rod means having a first end coupled to the distribution chute; vertically movable angular drive means, said vertically movable drive means being fixed in position on the furnace and including at least a first vertically movable output member; means coupling said drive means output member to the second end of said rod means; and means for transmitting motion to said vertically movable drive means independently of and during rotation of said casing whereby vertical movement of said rod means to adjust the pitch angle of the chute may be accomplished independently of the rotary motion of the chute.
Claim 2
Dependent Claim
151 words
In a furnace, the furnace being provided with a material feed spout and a movable distribution chute arranged to receive material from the spout, an improved chute position control comprising; a rotary casing; means for causing rotation of said casing; means pivotally connecting the first end of the distribution chute to said casing; rod means having a first end coupled to the distribution chute; vertically movable angular drive means, said vertically movable drive means being fixed in position on the furnace and including at least a first vertically movable output member; means coupling said drive means output member to the second end of said rod means; and means for transmitting motion to said vertically movable drive means independently of and during rotation of said casing whereby vertical movement of said rod means to adjust the pitch angle of the chute may be accomplished independently of the rotary motion of the chute.
Claim 3
Dependent Claim
26 words
The control of claim 1 wherein said rod means comprises a rod having an extended S-shape and formed in a T-shaped manner at its first end.
Claim 4
Dependent Claim
55 words
The control of claim 1 wherein said coupling means comprises: a retaining ring, said retaining ring being mechanically connected to said rod means second end; a rotary ring; a rigidizing member interconnecting said retaining ring and rotary ring; and a roller rotary connection interconnecting said rotary ring and said vertically movable drive means output member.
Claim 5
Dependent Claim
89 words
The control of claim 3 wherein said vertically movable drive means is coaxial with and exterior of the feed spout and comprises: means engaging said roller rotary connection at a plurality of circumferentially displaced points, said engaging means each comprising rotatable screw means and an output member carried by each of said screw means; and wherein said motion transmitting means comprises: means for synchronously driving said screw means whereby said roller rotary connection may be caused to translate in a direction parallel to the axis of the feed spout.
Claim 6
Dependent Claim
28 words
The control of claim 4 wherein the engaging means are arranged about the periphery of the roller rotary connection and are displaced by 120* relative to one another.
Claim 7
Dependent Claim
26 words
The control of claim 5 wherein said rod means comprises: a rod having an extended S-shape and formed in a T-shaped manner at its first end.
Claim 8
Dependent Claim
14 words
The control of claim 6 wherein said engaging means each comprise: an endless screw.
Claim 9
Dependent Claim
29 words
The control of claim 7 wherein said synchronous drive means includes: a drive motor; a drive chain; and angular connections for coupling said drive chain to said endless screws.
Claim 10
Dependent Claim
14 words
The control of claim 4 wherein said engaging means each comprise: an endless screw.
Claim 11
Dependent Claim
29 words
The control of claim 9 wherein said synchronous drive means includes: a drive motor; a drive chain; and angular connections for coupling said drive chain to said endless screw.
Claim 12
Dependent Claim
29 words
The control of claim 1 further comprising: means for establishing a positive pressure about said vertically movable angular drive means with respect to the pressure of the operating environment.
Claim 13
Dependent Claim
34 words
The apparatus of claim 11 wherein said positive pressure establishing means comprises: a casing surrounding said vertically movable angular drive means; and means for delivering a pressurized gas to the interior of said casing.
Claim 14
Dependent Claim
53 words
Method for charging a shaft furnace, the furnace having a rotatable and angularly adjustable charge distribution chute mounted therein comprising the steps of rotating the charge distribution chute by means of a rotary casing separately and independently therefrom adjusting the pitch angle of the distribution chute relative to the blast furnace central axis.
Claim 15
Dependent Claim
53 words
Method for charging a shaft furnace, the furnace having a rotatable and angularly adjustable charge distribution chute mounted therein comprising the steps of rotating the charge distribution chute by means of a rotary casing separately and independently therefrom adjusting the pitch angle of the distribution chute relative to the blast furnace central axis.
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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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |