Patent US3215560A successfully refreshed from Google Patents.
US3215560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of cleaning hot air furnaces and duct systems associated therewith
Assignee: Individual
•
Filing: 1963-09-27
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Granted: 1965-11-02
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Expires: 1983-09-27
Abstract
No abstract record available.
Inventors
- 👤 Kredit William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:43
CPC Classifications
F; F23; F23J; F23J3/00; F23J3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
211 words
A METHOD OF REMOVING DUST AND ACCUMULATED FOREIGN MATTER FROM THE PLENUM AND THE DUCT OF A HOT AIR FURNACE SYSTEM, SAID DUCT LEADING FROM SAID PLENUM TO A SPACE TO BE HEATED, COMPRISING: (A) FORMING AN OPENING IN SAID DUCT INTERMEDIATE SAID PLENUM AND THE REMOTE END OF SAID DUCT, (B) FEEDING INTO SAID DUCT THROUGH SAID OPENING AND PASSING AXIALLY THROUGH SAID DUCT IN THE DIRECTION OF SAID REMOTE END A FLEXIBLE, HIGH-PRESSURE AIR HOSE TERMINATING IN A NOZZLE HAVING AN AXIAL BORE, (C) PUMPING A FLUID CONSISTING OF AIR UNDER PRESSURE THROUGH SAID HOSE TO SAID NOZZLE, (D) EJECTING A PLURALITY OF STREAMS OF AIR FROM SAID NOZZLE IN THE FORM OF CIRCUMFERENTIALLY, EQUALLY SPACED PROJECTING JETS AROUND SAID NOZZLE WITH EACH JET DIRECTED TANGENTIALLY AND GENERALLY REARWARDLY FROM THE AXIS OF SAID BORE TO DISCHARGE SAID PLURALITY OF STREAMS OF AIR AGAINST THE INTERIOR OF THE DUCT IN THE DIRECTION OF SAID FURNACE WITH A SWIRLING MOTION HAVING COMPONENTS ALONG THE DUCT TOWARD SAID FURNACE AND TANGENTIALLY AROUND THE INTERIOR OF THE DUCT, TO DISLODGE THE DUST AND FOREIGN MATTER THEREFROM, (E) AND, SIMULTANEOUSLY, APPLYING A VACUUM TO THE FURNACE TO DRAW SAID AIR CONTAINING SAID DISLODGED DUST AND FOREIGN MATTER THROUGH SAID DUCT AND SAID PLENUM
Claim 2
Independent Claim
211 words
A METHOD OF REMOVING DUST AND ACCUMULATED FOREIGN MATTER FROM THE PLENUM AND THE DUCT OF A HOT AIR FURNACE SYSTEM, SAID DUCT LEADING FROM SAID PLENUM TO A SPACE TO BE HEATED, COMPRISING: (A) FORMING AN OPENING IN SAID DUCT INTERMEDIATE SAID PLENUM AND THE REMOTE END OF SAID DUCT, (B) FEEDING INTO SAID DUCT THROUGH SAID OPENING AND PASSING AXIALLY THROUGH SAID DUCT IN THE DIRECTION OF SAID REMOTE END A FLEXIBLE, HIGH-PRESSURE AIR HOSE TERMINATING IN A NOZZLE HAVING AN AXIAL BORE, (C) PUMPING A FLUID CONSISTING OF AIR UNDER PRESSURE THROUGH SAID HOSE TO SAID NOZZLE, (D) EJECTING A PLURALITY OF STREAMS OF AIR FROM SAID NOZZLE IN THE FORM OF CIRCUMFERENTIALLY, EQUALLY SPACED PROJECTING JETS AROUND SAID NOZZLE WITH EACH JET DIRECTED TANGENTIALLY AND GENERALLY REARWARDLY FROM THE AXIS OF SAID BORE TO DISCHARGE SAID PLURALITY OF STREAMS OF AIR AGAINST THE INTERIOR OF THE DUCT IN THE DIRECTION OF SAID FURNACE WITH A SWIRLING MOTION HAVING COMPONENTS ALONG THE DUCT TOWARD SAID FURNACE AND TANGENTIALLY AROUND THE INTERIOR OF THE DUCT, TO DISLODGE THE DUST AND FOREIGN MATTER THEREFROM, (E) AND, SIMULTANEOUSLY, APPLYING A VACUUM TO THE FURNACE TO DRAW SAID AIR CONTAINING SAID DISLODGED DUST AND FOREIGN MATTER THROUGH SAID DUCT AND SAID PLENUM
References Cited (Backward Citations)
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US968207A
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US1465711A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |