Patent US3294082A successfully refreshed from Google Patents.
US3294082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Serpentine-type heat exchange assembly
Assignee: Lennox Industries Inc
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Filing: 1964-08-19
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Granted: 1966-12-27
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Expires: 1984-08-19
Abstract
No abstract record available.
Inventors
- 👤 John W Norris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:58
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/06; F24H3/10; F24H3/105
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A CLAMSHELL-TYPE HEAT EXCHANGER ASSEMBLY COMPRISING A PLURALITY OF HEAT EXCHANGER UNITS EACH INCLUDING LEFT AND RIGHT SIDES OF SHEET METAL EACH HAVING SPACED APART PORTIONS AND PERIMETRIC FLANGED EDGES JOINED TOGETHER TO FORM A GENERALLY UPRIGHT PASSAGE, SAID SIDES BEING ELONGATED IN DEPTH AND HEIGHT, SAID PASSAGE INCLUDING A LOWER COMBUSTION CHAMBER LONGITUDINALLY EXTENDED FROM FRONT TO REAR ALONG A FIRST AXIS, AN UPPER FLUE GAS COLLECTION CHAMBER LONGITUDINALLY EXTENDED FROM FRONT TO REAR ALONG A SECOND AXIS, AND AN INTERMEDIATE CHAMBER LONGITUDINALLY EXTENDED FROM FRONT TO REAR, THE DEPTH AND HEIGHT OF THE HEAT EXCHANGER BEING RELATIVELY GREAT WITH RESPECT TO THE WIDTH THEREOF, THE INTERMEDIATE PORTIONS OF THE SIDES DEFINING THE INTERMEDIATE CHAMBER BEING CURVED AND THE FLANGED EDGES OF THE INTERMEDIATE PORTIONS BEING JOINED IN A SURFACE CURVED WIDELY OUT
Claim 2
Dependent Claim
134 words
A CLAMSHELL-TYPE HEAT EXCHANGER ASSEMBLY COMPRISING A PLURALITY OF HEAT EXCHANGER UNITS EACH INCLUDING LEFT AND RIGHT SIDES OF SHEET METAL EACH HAVING SPACED APART PORTIONS AND PERIMETRIC FLANGED EDGES JOINED TOGETHER TO FORM A GENERALLY UPRIGHT PASSAGE, SAID SIDES BEING ELONGATED IN DEPTH AND HEIGHT, SAID PASSAGE INCLUDING A LOWER COMBUSTION CHAMBER LONGITUDINALLY EXTENDED FROM FRONT TO REAR ALONG A FIRST AXIS, AN UPPER FLUE GAS COLLECTION CHAMBER LONGITUDINALLY EXTENDED FROM FRONT TO REAR ALONG A SECOND AXIS, AND AN INTERMEDIATE CHAMBER LONGITUDINALLY EXTENDED FROM FRONT TO REAR, THE DEPTH AND HEIGHT OF THE HEAT EXCHANGER BEING RELATIVELY GREAT WITH RESPECT TO THE WIDTH THEREOF, THE INTERMEDIATE PORTIONS OF THE SIDES DEFINING THE INTERMEDIATE CHAMBER BEING CURVED AND THE FLANGED EDGES OF THE INTERMEDIATE PORTIONS BEING JOINED IN A SURFACE CURVED WIDELY OUT
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) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |