US4279052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flue wall coke build-up removal device
Assignee: National Steel Corp
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Filing: 1980-02-08
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Granted: 1981-07-21
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Expires: 2000-02-08
Abstract
Abstract This invention relates to a device for cleaning opposed walls of a furnace pit. The device comprises a plurality of rotating screw-type cutters for removing built-up deposits upon the opposed walls of the furnace pit, a plurality of linkage arms for carrying the plurality of rotating screw-type cutters, a plurality of air motors for independently adjusting the speed of each half of the plurality of rotating screw-type cutters along each opposed wall of the furnace pit, and universal joints for allowing floating adjustment of each of the plurality of rotating screw-type cutters against each opposed wall of the furnace pit. The device also comprises piston-cylinder arrangements for moving the plurality of rotating screw-type cutters into and out of engagement with the built-up deposits upon the opposed walls of the furnace pit, a plate for allowing lifting of the rotating screw-type cutters up and down along the opposed walls of the furnace pit, a crane for lifting the plate, a vacuum pump for sucking out deposits removed from the opposed walls of the furnace pit, and at least one overhead rail for allowing travel of the crane from one furnace pit to another furnace pit.
Inventors
- 👤 Gerald D. Evrard
- 👤 Henry S. Cook
- 👤 Anthony J. Kamalich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:28
CPC Classifications
F; F23; F23J; F23J3/00; F23J3/02
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
94 words
A device for cleaning opposed walls of a furnace pit comprising: (a) a plurality of rotary means for removing built-up deposits upon each of the opposed walls of the furnace pit; (b) means for carrying the plurality of removing means; (c) means, connected to said carrying means, for independently adjusting the speed of the plurality of removing means along each opposed wall of the furnace pit; and (d) means, connected to said carrying means, for allowing floating adjustment of each of the plurality of removing means against the opposed walls of the furnace pit.
Claim 2
Independent Claim
94 words
A device for cleaning opposed walls of a furnace pit comprising: (a) a plurality of rotary means for removing built-up deposits upon each of the opposed walls of the furnace pit; (b) means for carrying the plurality of removing means; (c) means, connected to said carrying means, for independently adjusting the speed of the plurality of removing means along each opposed wall of the furnace pit; and (d) means, connected to said carrying means, for allowing floating adjustment of each of the plurality of removing means against the opposed walls of the furnace pit.
Claim 3
Dependent Claim
37 words
Device, according to claim 1, further comprising: means, connected to the carrying means, for moving the plurality of removing means into and out of engagement with the built-up deposits upon the opposed walls of the furnace pit.
Claim 4
Dependent Claim
13 words
Device, according to claim 2, wherein: said moving means is a piston-cylinder arrangement.
Claim 5
Dependent Claim
33 words
Device, according to claim 2, wherein: said moving means moves the plurality of removal means simultaneously into and out of engagement with the built-up deposits upon the opposed walls of the furnace pit.
Claim 6
Dependent Claim
31 words
Device, according to claim 1, further comprising: means, connected to the carrying means, for allowing lifting of the removing means up and down along the opposed walls of the furnace pit.
Claim 7
Dependent Claim
31 words
Device, according to claim 5, further comprising: means, connectable to the means for allowing lifting, for lifting said means for allowing lifting together with the carrying means and the removing means.
Claim 8
Dependent Claim
27 words
Device, according to claim 6, further comprising: means, connected to the lifting means, for sucking out built-up deposits removed from the opposed walls of the furnace pit.
Claim 9
Dependent Claim
17 words
Device, according to claim 7, wherein: said sucking means is a vacuum pump having a suction tube.
Claim 10
Dependent Claim
28 words
Device, according to claim 6, further comprising: means, cooperating with the lifting means, for allowing travel of the lifting means from the furnace pit to another furnace pit.
Claim 11
Dependent Claim
17 words
Device, according to claim 9, wherein: said means for allowing travel is at least one overhead rail.
Claim 12
Dependent Claim
27 words
Device, according to claim 6, wherein: said means for allowing lifting is a plate having a plurality of aperture means therethrough for engaging with the lifting means.
Claim 13
Dependent Claim
24 words
Device, according to claim 6, wherein: said lifting means is a crane having a plurality of means for engaging said means for allowing lifting.
Claim 14
Dependent Claim
42 words
Device, according to claim 12, further comprising: means, connected to the means for allowing lifting, for safely holding the carrying means and the removing means to said plurality of engaging means, in the event of breakage of the means for allowing lifting.
Claim 15
Dependent Claim
19 words
Device, according to claim 12, wherein: said plurality of engaging means is a plurality of dogs on lifting tongs.
Claim 16
Dependent Claim
13 words
Device, according to claim 13, wherein: said safe holding means is a chain.
Claim 17
Dependent Claim
18 words
Device, according to claim 1, wherein: said plurality of removing means is a plurality of rotating screw-type cutters.
Claim 18
Dependent Claim
15 words
Device, according to claim 16, wherein: said plurality of rotating screw-type cutters are horizontally oriented.
Claim 19
Dependent Claim
15 words
Device, according to claim 1, wherein: said carrying means is a plurality of linkage arms.
Claim 20
Dependent Claim
17 words
Device, according to claim 1, wherein: said independent speed adjusting means is a plurality of air motors.
Claim 21
Dependent Claim
16 words
Device, according to claim 1, wherein: said means for allowing floating adjustment is a universal joint.
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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) | 1984-07-20 | 1985-01-19 | 1985-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-20 | 1989-01-19 | 1989-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-20 | 1993-01-19 | 1993-07-21 | $7700.00 | Window Closed / Lapsed |