Patent US3800965A successfully refreshed from Google Patents.
US3800965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladle skimming mechanism
Assignee: Individual
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Filing: 1972-01-11
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Granted: 1974-04-02
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Expires: 1992-01-11
Abstract
Abstract The specification discloses a skimming mechanism used in steel mills for removing slag from the surface of the molten metal in a ladle, the mechanism comprising an extensible boom assembly pivotally mounted on a turntable and power means arranged for rotating the turntable and for pivotally moving the boom assembly in a vertical plane relative to the turntable. The boom assembly comprises telescoping tubular sections, adjustable anti-friction means supporting the inner tubular section within the outer tubular section, a power-actuated driving mechanism comprising cooperating sprocket wheels and roller chains for extending and retracting the inner boom section with respect to the outer boom section, and a skimming paddle comprising a scoop portion separably attached to a mounting bracket portion that is mounted on the outer end of the inner boom section.
Inventors
- 👤 G Barron
- 👤 H Pavone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:04
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/46; F; F27; F27D; F27D3/00; F27D3/15; F27D3/1545; F27D3/1554; F27D3/1563
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
264 words
In a skimming mechanism having a supporting structure, a boom assembly movably mounted on said structure, said boom assembly having an outer boom section, an inner boom section supported telescopically for reciprocative movement within said outer boom section, and a skimming paddle carried on the forward end of said inner boom section, the improvement comprising drive means for effecting reciprocative movement of the inner boom section within the outer boom section, which drive means comprises at least one length of roller chain stretched longitudinally in a straight line on one of said boom sections, said chain comprising rollers connected by links, means attaching the opposite ends of the chain to the boom section, means attaching certain links of the chain at intervals between the ends thereof to the said one boom section, at least one power-driven sprocket wheel carried on the other of said boom sections and drivingly engaging said chain, a series of horizontally disposed longitudinally spaced rollers carried on the outer boom section and having end flanges for guidably supporting said inner boom section against lateral deviation from a uniform reciprocative path relative to the outer boom section, means adjustably fixing the elevation of certain of said horizontal rollers in the series relative to said outer boom section to establish appropriate leveling of the inner boom section for proper driving relationship between a roller chain and its cooperating sprocket wheel, and means for adjusting the elevation of the remaining said horizontal rollers into supporting relation to the inner boom after the level of said inner boom is set by said certain rollers.
Claim 2
Dependent Claim
264 words
In a skimming mechanism having a supporting structure, a boom assembly movably mounted on said structure, said boom assembly having an outer boom section, an inner boom section supported telescopically for reciprocative movement within said outer boom section, and a skimming paddle carried on the forward end of said inner boom section, the improvement comprising drive means for effecting reciprocative movement of the inner boom section within the outer boom section, which drive means comprises at least one length of roller chain stretched longitudinally in a straight line on one of said boom sections, said chain comprising rollers connected by links, means attaching the opposite ends of the chain to the boom section, means attaching certain links of the chain at intervals between the ends thereof to the said one boom section, at least one power-driven sprocket wheel carried on the other of said boom sections and drivingly engaging said chain, a series of horizontally disposed longitudinally spaced rollers carried on the outer boom section and having end flanges for guidably supporting said inner boom section against lateral deviation from a uniform reciprocative path relative to the outer boom section, means adjustably fixing the elevation of certain of said horizontal rollers in the series relative to said outer boom section to establish appropriate leveling of the inner boom section for proper driving relationship between a roller chain and its cooperating sprocket wheel, and means for adjusting the elevation of the remaining said horizontal rollers into supporting relation to the inner boom after the level of said inner boom is set by said certain rollers.
Claim 3
Dependent Claim
55 words
A skimming mechanism according to claim 1, wherein said drive means comprises a plurality of lengths of roller chains fixed in parallel relation longitudinally on said inner boom section, and a plurality of power-driven sprocket wheels are carried on said outer boom section, at least two of which drivingly engage each of said roller chains.
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |