Patent US3765398A successfully refreshed from Google Patents.
US3765398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating apparatus for outdoors operation
Assignee: Carrier Corp
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Filing: 1972-10-19
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Granted: 1973-10-16
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Expires: 1992-10-19
Abstract
Abstract The casing of a rooftop heating apparatus is formed with plenum and heat exchanger compartments separated by a partition formed with a passage for air flow from the plenum compartment to the burner in the heat exchanger compartment. Damper means is mounted in the air flow passage of the partition and is normally positioned for maximum air flow with the plenum pressurized by a constant speed blower. The intake of the blower is subject to varying wind pressures. The damper means is responsive to air pressure in the plenum to vary the areas of the air flow passage proportionate to the pressure in the plenum and accordingly, to maintain the air flow to the burner at a predetermined level, whereby the burner operation is not adversely affected by gusts of wind.
Inventors
- 👤 R Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:21
CPC Classifications
F; F24; F24H; F24H9/00; F24H9/20; F24H9/2064; F24H9/2085; F24H3/00; F24H3/02; F24H3/06; F24H3/065; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7869
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
206 words
Heating apparatus for outdoors operation comprising a casing formed with a heat exchanger compartment and a plenum compartment, said compartments being separated by a partition, a heat exchanger mounted in said heat exchanger compartment, a burner associated with said heat exchanger for heating the same, a constant speed air blower having an intake communicating with the outdoor atmosphere and subject to varying wind pressure, said blower being operable to discharge air into said plenum compartment, a stack connected to said heat exchanger for the conveyance of products of combustion from said heat exchanger to the exterior of said casing, a bypass means extending from said plenum compartment to the exterior of said casing for the flow of air therefrom, an air flow passage extending through said partition from said plenum compartment to the burner in said heat exchanger compartment, an air flow control damper means mounted in said air flow passage, said damper means being movable from normal maximum air flow position to minimum air flow position, such movement being proportionate to the variation in wind pressure at the intake of said blower, said damper being operable during such movement to maintain the volume of air flow through said air flow passage at a predetermined level.
Claim 2
Dependent Claim
206 words
Heating apparatus for outdoors operation comprising a casing formed with a heat exchanger compartment and a plenum compartment, said compartments being separated by a partition, a heat exchanger mounted in said heat exchanger compartment, a burner associated with said heat exchanger for heating the same, a constant speed air blower having an intake communicating with the outdoor atmosphere and subject to varying wind pressure, said blower being operable to discharge air into said plenum compartment, a stack connected to said heat exchanger for the conveyance of products of combustion from said heat exchanger to the exterior of said casing, a bypass means extending from said plenum compartment to the exterior of said casing for the flow of air therefrom, an air flow passage extending through said partition from said plenum compartment to the burner in said heat exchanger compartment, an air flow control damper means mounted in said air flow passage, said damper means being movable from normal maximum air flow position to minimum air flow position, such movement being proportionate to the variation in wind pressure at the intake of said blower, said damper being operable during such movement to maintain the volume of air flow through said air flow passage at a predetermined level.
Claim 3
Dependent Claim
16 words
Heating apparatus as set forth in claim 1 wherein said burner is a gas fired burner.
Claim 4
Dependent Claim
16 words
Heating apparatus as set forth in claim 1 wherein said bypass means communicates with said stack.
Claim 5
Dependent Claim
130 words
Heating apparatus as set forth in claim 1 wherein said partition is disposed vertically in said casing and said air flow passage is disposed upwardly from the bottom of said plenum compartment and extends transversely thereof, said damper means consisting of an inverted ''''V'''' shaped member, support means pivotally supporting said member in said air flow passage at the bight of said member for free pivotal movement, with the sides of said member diverging downwardly from said pivot and being normally positioned in spaced straddling relation to the bottom side of said air flow passage whereby the upstream side of said damper member is moved toward said partition for reducing the area of said air flow passage proportionate to an increase in the air pressure from normal in said plenum.
Claim 6
Dependent Claim
25 words
Heating apparatus as set forth in claim 4 and including stop means for limiting movement of said upStream side of said damper toward said partition.
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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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |