US3742916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for cleaning an air passage in the wall of a refuse burning furnace
Assignee: Gotaverken Angteknik AB
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Filing: 1971-11-12
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Granted: 1973-07-03
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Expires: 1991-11-12
Abstract
Abstract The passages in the wall of a refuse burning furnace for supplying combustion air thereto run an apparent risk of being clogged by particles of solid matter carried by the combustion gases. In order to remove such deposits a sleeve is fitted into the each passage, and is connected to a driving means designed to impart a reciprocatory forwards and backwards movement thereto. A scraper ring may be fitted inside the sleeve to support the pushing out action, and air for cooling purposes may be supplied to the clearance between the wall of the passage and the sleeve.
Inventors
- 👤 J Wessberg
- 👤 K Astrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:22
CPC Classifications
F; F23; F23J; F23J3/00; F23L; F23L1/00; F23M; F23M5/00; F23M5/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
130 words
An arrangement for cleaning an air passage in the wall of a refuse burning furnace, comprising a sleeve mounted within the passage, being shorter than the latter and shaped substantially to follow the internal cross section of the passage, and means for imparting a forwards and backwards reciprocatory movement to the sleeve within the passage, the internal wall of the passage being provided with elongated ledges serving to govern the movements of the sleeve with a clearance with respect to the wall of the passage. 2. The arrangement according to claim 1, in which a scraper ring is fitted into the sleeve, near the end thereof turned towards the furnace, said ring being mounted at the wall of the passage by means of pegs passing elongated slots in the sleeve.
Claim 2
Dependent Claim
51 words
The arrangement according to claim 1, further including a number of openings in the wall of the passage, said openings communicating with the air supply side of the passage and being designed to supply a limited amount of air to the clearance between the sleeve and the wall of the passage.
Claim 3
Dependent Claim
65 words
The arrangement according to claim 1, which further comprises a common actuating member which interconnects sleeves in a number of passages within a series of said passages and wherein a driving means is in operative association with said common actuating member, the arrangement further including a governor automatically activating said driving means at pre-determined intervals on each occasion to perform a certain number of strokes.
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) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |