US3628676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coal feeding system for mechanical feed-type larry car
Assignee: Raymond Kaiser Engineers Inc
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Filing: 1970-05-06
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Granted: 1971-12-21
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Expires: 1990-05-06
Abstract
Abstract In conjunction with a mechanical turntable feed-type larry car, apparatus for keeping the charging hole of a coke oven chamber sealed while charging coal includes telescoping tubes, one of which coacts with the charging hole periphery, and a pivotable shoe that rides on coal on the turntable. When coal is being charged, the shoe, acting through suitable control apparatus, keeps a damper valve open. But, when insufficient quantity of coal is on the turntable, the shoe closes the damper valve.
Inventors
- 👤 Linwood G Tucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:35
CPC Classifications
C; C10; C10B; C10B31/00; C10B31/02; C10B31/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
186 words
In apparatus for charging coal from a coal hopper of a larry car into a coke oven chamber by means of a rotatable turntable, the combination with said turntable of: a. a fixed coal conduit mounted to said larry car and adapted for receiving coal when discharged by said turntable; b. a movable coal conduit surrounding and telescopable with a portion of said fixed coal conduit, said movable coal conduit having an end adapted to coact with and seal against said coke oven chamber; c. means for sealing the joint between said movable and said fixed coal conduit; d. means to raise and lower said movable conduit into and out of cooperative engagement with said coke oven; e. a coal flow control device in the fixed coal conduit for regulating the flow of coal through said coal conduit; and f. means coacting with coal on said turntable as it rotates and discharges coal that controls said coal flow control device whereby, when sufficient coal is being discharged, said coal flow device is open and when said coal flow is not sufficient, said coal flow device closes.
Claim 2
Dependent Claim
186 words
In apparatus for charging coal from a coal hopper of a larry car into a coke oven chamber by means of a rotatable turntable, the combination with said turntable of: a. a fixed coal conduit mounted to said larry car and adapted for receiving coal when discharged by said turntable; b. a movable coal conduit surrounding and telescopable with a portion of said fixed coal conduit, said movable coal conduit having an end adapted to coact with and seal against said coke oven chamber; c. means for sealing the joint between said movable and said fixed coal conduit; d. means to raise and lower said movable conduit into and out of cooperative engagement with said coke oven; e. a coal flow control device in the fixed coal conduit for regulating the flow of coal through said coal conduit; and f. means coacting with coal on said turntable as it rotates and discharges coal that controls said coal flow control device whereby, when sufficient coal is being discharged, said coal flow device is open and when said coal flow is not sufficient, said coal flow device closes.
Claim 3
Dependent Claim
42 words
The invention of claim 1 wherein: a. said means coacting with the coal on said turntable is a pivotable shoe; and including b. means operating in response to the movement of said shoe for opening and closing said coal flow control device.
Claim 4
Dependent Claim
32 words
The invention of claim 1 wherein: a. said coal flow control device includes a butterfly valve pivotable in said coal conduit; and including b. means for opening and closing said butterfly valve.
Claim 5
Dependent Claim
131 words
In apparatus for charging coal from a coal hopper of a larry car into a coke oven chamber by means of a rotatable turntable, the combination with said turntable of: a. a coal conduit communicating with said hopper for passing coal into said coke oven chamber; b. a coal flow regulating device mounted in said coal conduit; c. a pivotable shoe mounted within said coal hopper and coactive with coal on said turntable; and d. means to rotate said turntable whereby coal is discharged from said hopper into said coal conduit and thence into said coke oven chamber, said pivotable shoe being connected to said flow control device so that it remains open as long as sufficient coal is on said turntable and closes when insufficient coal is on said turntable.
Claim 6
Dependent Claim
131 words
In apparatus for charging coal from a coal hopper of a larry car into a coke oven chamber by means of a rotatable turntable, the combination with said turntable of: a. a coal conduit communicating with said hopper for passing coal into said coke oven chamber; b. a coal flow regulating device mounted in said coal conduit; c. a pivotable shoe mounted within said coal hopper and coactive with coal on said turntable; and d. means to rotate said turntable whereby coal is discharged from said hopper into said coal conduit and thence into said coke oven chamber, said pivotable shoe being connected to said flow control device so that it remains open as long as sufficient coal is on said turntable and closes when insufficient coal is on said turntable.
References Cited (Backward Citations)
US3070516A
Cited
US3542218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |