US3899088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace charging apparatus
Assignee: IHI Corp
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Filing: 1974-01-30
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Granted: 1975-08-12
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Expires: 1994-01-30
Abstract
Abstract A raw material distribution chute is rotated when inner and outer cylinders are rotated in unison, and is tilted when the inner or outer cylinder is vertically moved with respect to the outer or inner cylinder. The rotation and tilting of the distribution chute may be made simultaneously or individually so that the pattern of raw material distribution may be varied over a wide range.
Inventors
- 👤 Shoji Furuya
- 👤 Masaoki Takahashi
- 👤 Masatoshi Matsushima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:10
CPC Classifications
C; C21; C21B; C21B7/00; C21B7/18; C21B7/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
145 words
Mechanism for charging a furnace with raw materials through a top opening comprising a distribution chute positioned in the upper portion of the furnace adjacent the opening, means for mounting said chute for rotation about the vertical axis of the furnace and for independent angular adjustment with respect to said axis, a pair of concentrically arranged cylinders positioned exteriorally of said furnace and aligned with said vertical axis, said cylinders being connected for rotation together and slideable movement with respect to each other, first power means for rotating said cylinders, second power means for slideably moving one cylinder with respect to the other, means connecting one of the cylinders with the chute to rotate the latter upon operation of said first power means, and means connecting the other cylinder with the chute for angular adjustment of the latter upon operation of said second power means.
Claim 2
Dependent Claim
145 words
Mechanism for charging a furnace with raw materials through a top opening comprising a distribution chute positioned in the upper portion of the furnace adjacent the opening, means for mounting said chute for rotation about the vertical axis of the furnace and for independent angular adjustment with respect to said axis, a pair of concentrically arranged cylinders positioned exteriorally of said furnace and aligned with said vertical axis, said cylinders being connected for rotation together and slideable movement with respect to each other, first power means for rotating said cylinders, second power means for slideably moving one cylinder with respect to the other, means connecting one of the cylinders with the chute to rotate the latter upon operation of said first power means, and means connecting the other cylinder with the chute for angular adjustment of the latter upon operation of said second power means.
Claim 3
Dependent Claim
30 words
Mechanism as set forth in claim 1 which includes interengaging vertically arranged rails and grooves formed on said cylinders to enable slideable movement of one with respect to the other.
Claim 4
Dependent Claim
23 words
Mechanism as set forth in claim 2 wherein one cylinder is provided with a ring gear operatively connected with the first power means.
References Cited (Backward Citations)
US3693812A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |