US3838665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace wall containing spaced, parallel water tubes and blocks mounted thereon
Assignee: Goetaverken Angteknik AB
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Filing: 1973-06-01
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Granted: 1974-10-01
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Expires: 1993-06-01
Abstract
Abstract In a block-covered furnace wall the face of an individual block turned towards a tube is formed with a radius, which is slightly smaller than one half of the external diameter of the tube. When first applied to a tube the block will thus not make full contact with the tube, but the blocks are, in pairs, forced towards the tubes by wedge shaped members and screw threaded means. To facilitate the necessary deformation each block is provided with a slim waist portion, against which the wedge member bears.
Inventors
- 👤 I Astrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:00
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/10; F22B37/107; F22B37/108; F23; F23M; F23M5/00; F23M5/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
149 words
In a furnace wall containing spaced parallel water tubes, fire resistant blocks at the faces of the tubes turned towards the furnace and means for retaining the blocks at the wall, the improvement that the face of an individual block turned towards one of the tubes along at least part of its peripheral extension is formed with a radius slightly smaller than one half of the external diameter of the tube, whereby the block, when first applied to one of the tubes, will contact the latter along two spaced longitudinal edges only, the block between said edges being formed with reduced thickness to provide a slim waist portion, and that the means for retaining the blocks to the wall includes a wedge shaped member designed to be fitted between every two blocks mounted in the same horizontal plane, and further means for forcing the wedge member towards the wall.
Claim 2
Dependent Claim
149 words
In a furnace wall containing spaced parallel water tubes, fire resistant blocks at the faces of the tubes turned towards the furnace and means for retaining the blocks at the wall, the improvement that the face of an individual block turned towards one of the tubes along at least part of its peripheral extension is formed with a radius slightly smaller than one half of the external diameter of the tube, whereby the block, when first applied to one of the tubes, will contact the latter along two spaced longitudinal edges only, the block between said edges being formed with reduced thickness to provide a slim waist portion, and that the means for retaining the blocks to the wall includes a wedge shaped member designed to be fitted between every two blocks mounted in the same horizontal plane, and further means for forcing the wedge member towards the wall.
Claim 3
Dependent Claim
43 words
The furnace wall according to claim 1, in which each block is designed to encLose about 1/2 of the circumference of a tube, the waist portion of the block being located at an angle of about 45* to the plane of the wall.
Claim 4
Dependent Claim
47 words
The furnace wall according to claim 1, in which each block is designed to enclose about 1/2 of the circumference of a tube, and having a waist portion located to each side of a plane perpendicular to the wall and including the center line of the tube.
Claim 5
Dependent Claim
31 words
The furnace wall according to claim 3, in which each block, at its face turned towards the furnace, is provided with a longitudinally running groove located in the said perpendicular plane.
Claim 6
Dependent Claim
69 words
The furnace wall according to claim 1, in which each block is formed with an external surface arranged at an angle to the plane of the wall, the wedge members having a top angle slightly in excess of the angle formed by said surfaces of two adjacent, unbiased blocks, the wedge member having such an extension that it, in untightened position, will abut the waists of the pertaining blocks.
Claim 7
Dependent Claim
30 words
The furnace wall according to claim 1, in which the faces of the wedge members turned towards the furnace are each provided with a number of parallel, horizontally arranged slots.
Claim 8
Dependent Claim
64 words
The furnace wall according to claim 1, in which the tubes are interconnected by fins to form a membrane wall, the feature that each wedge member is provided with at least one stud welded bolt, the fins being provided with matching openings for the passage of said at least one bolt and clamping means outside the membrane wall for tightening the wedge shaped members.
Claim 9
Dependent Claim
60 words
The furnace wall according to claim 1, in which the tubes are interconnected by fins to form a membrane wall, the feature that bolts are stud welded to the face of the fins presented towards the furnace, the wedge members being provided with matching openings and the bolts having sufficient length to present a threaded end outside the wedge member.
References Cited (Backward Citations)
US1999046A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |