US2792316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for cleaning gas-swept heating surfaces
Assignee: A Ekstroms Maskinaffar AB
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Filing: 1954-02-01
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Granted: 1957-05-14
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Expires: 1974-02-01
Abstract
No abstract record available.
Inventors
- 👤 Broman Bror Olof
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:59
CPC Classifications
F; F28; F28G; F28G3/00; F28G3/16; F23; F23J; F23J3/00; F23J3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A METHOD OF CLEANING GAS-SWEPT HEATING SURFACES OF HEAT INTERCHANGING APPARATUS COMPRISING FEEDING SOLID CLEANING PARTICLES FOR A GIVEN PERIOD OF TIME ONLY FORM A SOURCE OF SUPPLY ABOVE THE APPARATUS AND DISTRIBUTING THE PARTICLES WITHIN THE APPARTUS AT A PREDETERMINED RATE, ABOVE THE SURFACES TO THE CLEANED AND THROUGHOUT SUBSTANTIALLY THE CROSS-SECTIONAL AREA OF THE APPARATUS SO THAT THE PARTICLES CASCADE THROUGH THE APPARATUS BY GRAVITY AND IMPACT AND RICOCHET AGAINST THE SURFACES TO BE CLEANED TO PICK UP MATERIAL ACCUMULATED THEREON AND TO DISLODGE PARTICLES OR MATERIAL THEREFROM, SEPARATING AT LEAST MOST OF THE MATERIAL FROM THE PARTICLES, COLLECTING THE PARTICLES BENEATH THE SURFACES, ENTRAINING THE PARTICLES IN A CONFINED GASEOUS CURRENT AND RETURNING THE PARTICLES TO THE SOURCE FOR A PERIOD SUBSTANTIALLY IN EXCESS OR THE PERIOD OF FEED WITH THE RATE OF RETURN BEING SUBSTANTIALLY SLOWER THAN THE RATE OF PASSAGE THROUGH THE APPARATUS SO THAT CLEANING PARTICLES ACCUMULATE AT THE SOURCE FOR USE DURING A SUBSEQUENT CLEANING OPERATION.
Claim 2
Independent Claim
163 words
A METHOD OF CLEANING GAS-SWEPT HEATING SURFACES OF HEAT INTERCHANGING APPARATUS COMPRISING FEEDING SOLID CLEANING PARTICLES FOR A GIVEN PERIOD OF TIME ONLY FORM A SOURCE OF SUPPLY ABOVE THE APPARATUS AND DISTRIBUTING THE PARTICLES WITHIN THE APPARTUS AT A PREDETERMINED RATE, ABOVE THE SURFACES TO THE CLEANED AND THROUGHOUT SUBSTANTIALLY THE CROSS-SECTIONAL AREA OF THE APPARATUS SO THAT THE PARTICLES CASCADE THROUGH THE APPARATUS BY GRAVITY AND IMPACT AND RICOCHET AGAINST THE SURFACES TO BE CLEANED TO PICK UP MATERIAL ACCUMULATED THEREON AND TO DISLODGE PARTICLES OR MATERIAL THEREFROM, SEPARATING AT LEAST MOST OF THE MATERIAL FROM THE PARTICLES, COLLECTING THE PARTICLES BENEATH THE SURFACES, ENTRAINING THE PARTICLES IN A CONFINED GASEOUS CURRENT AND RETURNING THE PARTICLES TO THE SOURCE FOR A PERIOD SUBSTANTIALLY IN EXCESS OR THE PERIOD OF FEED WITH THE RATE OF RETURN BEING SUBSTANTIALLY SLOWER THAN THE RATE OF PASSAGE THROUGH THE APPARATUS SO THAT CLEANING PARTICLES ACCUMULATE AT THE SOURCE FOR USE DURING A SUBSEQUENT CLEANING OPERATION.
References Cited (Backward Citations)
US2665118A
Cited
US2665119A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-13 | 1960-11-12 | 1961-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-13 | 1964-11-12 | 1965-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-13 | 1968-11-12 | 1969-05-14 | $7700.00 | Window Closed / Lapsed |