US3111979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual fuel burner construction
Assignee: Lennox Industries Inc
•
Filing: 1960-03-07
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Granted: 1963-11-26
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Expires: 1980-03-07
Abstract
No abstract record available.
Inventors
- 👤 Peoples Graydon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:45
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/06; F24H3/08; F24H3/087; F23; F23D; F23D17/00; F23D17/002; F24H3/065; F24H9/00; F24H9/18; F24H9/1854; F24H9/1877; F24H9/1881
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
IN A DUAL FUEL BURNER CONSTRUCTION OF THE CHARACTER DISCLOSED, A DRAFT TUBE, A FIRST SWIRL SLEEVE TELESCOPICALLY MOUNTED THEREIN, COAXIAL THEREWITH, AND HAVING RADIALLY INWARDLY PROJECTING VANE MEANS, SAID VANE MEANS BEING SPIRALLY ARRANGED TO SWIRL THE AIR PASSING THERETHROUGH IN ONE DIRECTION OF ROTATION, SAID DRAFT TUBE EXTENDING FORWARDLY BEYOND SAID SLEEVE AND HAVING GAS DISCHARGE OPENINGS THROUGH THE WALL THEREOF WHICH HAVE AXES AT RIGHT ANGLES TO THE AXIS OF SAID DRAFT TUBE, SAID GAS DISCHARGE OPENINGS BEING LOCATED IMMEDIATELY IN FRONT OF SAID SWIRL SLEEVE, MEANS FORMING A GAS CHAMBER SURROUNDING SAID DRAFT TUBE, A GAS SUPPLY PIPE LEADING THERETO, A SECOND SWIRL SLEEVE TELESCOPICALLY MOUNTED INSIDE SAID FIRST SWIRL SLEEVE AND COAXIAL THEREWITH, SAID SECOND SWIRL SLEEVE
Claim 2
Dependent Claim
122 words
IN A DUAL FUEL BURNER CONSTRUCTION OF THE CHARACTER DISCLOSED, A DRAFT TUBE, A FIRST SWIRL SLEEVE TELESCOPICALLY MOUNTED THEREIN, COAXIAL THEREWITH, AND HAVING RADIALLY INWARDLY PROJECTING VANE MEANS, SAID VANE MEANS BEING SPIRALLY ARRANGED TO SWIRL THE AIR PASSING THERETHROUGH IN ONE DIRECTION OF ROTATION, SAID DRAFT TUBE EXTENDING FORWARDLY BEYOND SAID SLEEVE AND HAVING GAS DISCHARGE OPENINGS THROUGH THE WALL THEREOF WHICH HAVE AXES AT RIGHT ANGLES TO THE AXIS OF SAID DRAFT TUBE, SAID GAS DISCHARGE OPENINGS BEING LOCATED IMMEDIATELY IN FRONT OF SAID SWIRL SLEEVE, MEANS FORMING A GAS CHAMBER SURROUNDING SAID DRAFT TUBE, A GAS SUPPLY PIPE LEADING THERETO, A SECOND SWIRL SLEEVE TELESCOPICALLY MOUNTED INSIDE SAID FIRST SWIRL SLEEVE AND COAXIAL THEREWITH, SAID SECOND SWIRL SLEEVE
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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) | 1966-11-25 | 1967-05-27 | 1967-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-25 | 1971-05-27 | 1971-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-25 | 1975-05-27 | 1975-11-26 | $7700.00 | Window Closed / Lapsed |