US3930489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating system
Assignee: Individual
•
Filing: 1975-03-05
•
Granted: 1976-01-06
•
Expires: 1995-03-05
Abstract
Abstract A system for utilizing furnace waste stack pipe heat which comprises elongating the waste stack pipe so that it defines a substantially rectangular shape and, when a blower is used in conjunction with the furnace, so that it extends over the blower in order that air drawn into the blower is preheated, the system further including placing a cover or hood over the elongated waste stack pipe and a baffle plate thereunder, each in close proximity thereto, for forcing the currents of air to move in close proximity to the hot waste stack pipe to readily absorb the heat therefrom.
Inventors
- 👤 Fred A. Anable
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:16
CPC Classifications
F; F28; F28D; F28D21/00; F28D21/0001; F28D21/0003; F28D21/0005; F28D21/0008
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
350 words
In a heating system located in a furnace room and including a furnace and an air blower for delivering air to the furnace via an inlet stack and heating pipes for the delivery of heated air from the furnace to the areas to be heated, the improvement in means for utilizing the heat passing through from the furnace to the chimney by preheating furnace room air wiped therepast preliminary to passage thereof through the air blower and inlet stack to the furnace comprising: an elongated horizontally disposed waste stack of generally rectangular plan for the through flow of exhaust gases from the furnace to the chimney and including, a first end portion connected at its inboard end to the furnace and having an outboard end and a first side portion connected at its inboard end to the outboard end of the first end portion and having an outboard end and a second end portion connected at its inboard end to the outboard end of the first side portion and having an outboard end and a second side portion connected at its inboard end to the outboard end of the second end portion and having an outboard end connected to the chimney, a first pair of arcuate deflectors disposed in close spaced relationship and circumadjacent the oppositely facing sections of the spaced first and second side portions of the waste stack and defining primary curvilinear air passages therebetween, a horizontally disposed baffle connecting between the arcuate deflectors of the first pair thereof, an opened bottom hood including a horizontally disposed top wall section and spaced opposite end and side wall sections depending therefrom in curving relationship therewith, the respective top and end and side wall sections of the hood being disposed in uniform spaced relationship and in close proximity to the adjacent portions of the waste stack and defining secondary curvilinear air passages therebetween, with air from the furnace room being captured and circulated first within the secondary air passages and second within the primary air passages for wiping relationship relative to the side and end portions of the waste stack.
Claim 2
Dependent Claim
350 words
In a heating system located in a furnace room and including a furnace and an air blower for delivering air to the furnace via an inlet stack and heating pipes for the delivery of heated air from the furnace to the areas to be heated, the improvement in means for utilizing the heat passing through from the furnace to the chimney by preheating furnace room air wiped therepast preliminary to passage thereof through the air blower and inlet stack to the furnace comprising: an elongated horizontally disposed waste stack of generally rectangular plan for the through flow of exhaust gases from the furnace to the chimney and including, a first end portion connected at its inboard end to the furnace and having an outboard end and a first side portion connected at its inboard end to the outboard end of the first end portion and having an outboard end and a second end portion connected at its inboard end to the outboard end of the first side portion and having an outboard end and a second side portion connected at its inboard end to the outboard end of the second end portion and having an outboard end connected to the chimney, a first pair of arcuate deflectors disposed in close spaced relationship and circumadjacent the oppositely facing sections of the spaced first and second side portions of the waste stack and defining primary curvilinear air passages therebetween, a horizontally disposed baffle connecting between the arcuate deflectors of the first pair thereof, an opened bottom hood including a horizontally disposed top wall section and spaced opposite end and side wall sections depending therefrom in curving relationship therewith, the respective top and end and side wall sections of the hood being disposed in uniform spaced relationship and in close proximity to the adjacent portions of the waste stack and defining secondary curvilinear air passages therebetween, with air from the furnace room being captured and circulated first within the secondary air passages and second within the primary air passages for wiping relationship relative to the side and end portions of the waste stack.
Claim 3
Dependent Claim
43 words
In the heating system as set forth in claim 1, including, a second pair of arcuate deflectors disposed in spaced relationships circumadjacent the oppositely facing sections of the first and second end portions of the waste stack and defining tertiary air passages therebetween.
References Cited (Backward Citations)
US1519673A
Cited
US1558848A
Cited
US1530809A
Cited
US1966360A
Cited
US2386746A
Cited
US2425630A
Cited
US2789520A
Cited
US2891535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |