US3722865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Walking beam furnace
Assignee: Koppers Wistra Ofenbau GmbH
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Filing: 1971-03-22
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Granted: 1973-03-27
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Expires: 1991-03-22
Abstract
Abstract In a walking beam furnace there is provided at least one lower and at least one superposed upper walking beam support frame. These are mounted for relative vertical as well as longitudinal movement. Components having upwardly inclined surfaces are interposed between the frames with which they cooperate so as to effect relative vertical displacement of the upper frame with reference to the lower frame when the frames are moved longitudinally relative to one another. A rack is fast with the lower frame and a stationarily mounted gear cooperates with this rack to cause longitudinal displacement of the lower frame. Another rack is fast with the upper frame and an engaging arrangement is provided, including a stationary upright hollow guide member located beneath the upper frame, an upright support which is guided in the guide member for vertical movement, a gear wheel turnably carried by the upright support and camming with the rack on the upper frame, and a biasing arrangement such as a counterweight which permanently urges the gear wheel into engagement with the rack on the upper frame.
Inventors
- 👤 H Storck
- 👤 W Erhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:22
CPC Classifications
F; F27; F27B; F27B9/00; F27B9/14; F27B9/20; F27B9/201; F27B9/202; F27B9/203
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
189 words
In a walking beam furnace having a floor extending longitudinally of the furnace, in combination, at least one lower and at least one superposed upper walking beam support frame, mounted for relative movement vertically as well as longitudinally with reference to said floor; support means interposed between said frames cooperating therewith and having inclined surfaces which effect vertical relative displacement of said frames in response to relative longitudinal displacement thereof; a first rack fast with said lower frame and a second rack fast with said upper frame, each extending longitudinally of the respective frame; stationarily mounted drive means cooperating with said first rack for effecting longitudinal displacement of said lower frame; and engaging means cooperating with said second rack and comprising a stationary upright hollow guide member beneath said upper frame, an upright support guided in said guide member for vertical movement, a gear wheel turnably carried by said support upwardly of said guide member, and biasing means permanently urging said gear wheel into engagement with said second rack. CM,2 walking beam furnace as defined in claim 1, wherein said biasing means comprises weight means connected with said support.
Claim 2
Dependent Claim
36 words
In a walking beam furnace as defined in claim 1; and further comprising arresting means operable for arresting said gear wheel against turning movement when it is desired to prevent longitudinal displacement of said upper frame.
Claim 3
Dependent Claim
19 words
In a walking beam furnace as defined in claim 3, wherein said arresting means is a magnetic braking device.
Claim 4
Dependent Claim
85 words
In a walking beam furnace as defined in claim 1, said support means being mounted on and located underneath said upper frame and said inclined surfAces being downwardly directed; further comprising a plurality of rollers each mounted on said lower frame for turning movement about a substantially horizontal axis which is stationary with reference to said lower frame; and detent means on said inclined surfaces for detaining said rollers against further rolling movement upon said upper frame reaching a highest and a lowest position, respectively.
Claim 5
Dependent Claim
63 words
In a walking beam furnace as defined in claim 1; further comprising at least one additional lower frame and at least one additional upper frame, additional support means, additional first and second racks, additional stationarily mounted drive means and additional engaging means; and further comprising operating means for operating said drive means and said additional drive means severally or in unison, as desired.
Claim 6
Dependent Claim
34 words
In a walking beam furnace as defined in claim 6, wherein said drive means and said additional drive means each comprise a gear camming with said first rack and said additional first rack, respectively.
Claim 7
Dependent Claim
42 words
In a walking beam furnace as defined in claim 7, said operating means comprising a shaft mounting both of said gears for turning movement, and pivotable means for selectively moving the respective gears into and out of mesh with the associated rack.
Claim 8
Dependent Claim
77 words
In a walking beam furnace as defined in claim 1; further comprising an upright tubular guide element mounted stationarily below said upper frame, an upright member guided for vertical displacement in said guide element, a gear element carried by said upright member above said guide element and camming with said second rack, and a biasing element acting upon said upright member in a sense tending to maintain said gear element in camming engagement with said second rack.
Claim 9
Dependent Claim
100 words
In a walking beam furnace as defined in claim 9, said upright member being elongated in upright direction and having at least a portion located exteriorly of said upright guide element; further comprising a third rack provided on said portion and extending in direction of elongation of said upright member; sand seal means extending longitudinally of said frames and being vertically movable with reference thereto; a pinion camming with said third rack; and linkage means connecting said pinion with said sand seal means in a sense effecting vertical displacement of the same in response to relative displacement of said frames.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |