Patent US3880140A successfully refreshed from Google Patents.
US3880140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Room heater
Assignee: Individual
•
Filing: 1974-01-28
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Granted: 1975-04-29
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Expires: 1994-01-28
Abstract
Abstract A room heater consisting of an air plenum chamber surrounding a combustion chamber, and a blower operable to direct room air admitted at the top downwardly through said plenum chamber, and then downwardly and outwardly against the room floor, whereby the normal gravity convection air currents in the room which would occur in a heater without a blower are reversed, so that the warmer air temperatures are concentrated at the floor level rather than at the ceiling level, resulting in more effective and efficient use of the heat and fuel. The blower and plenum chamber are specially constructed to provide a ''''nozzle'''' effect in order to obtain the air velocity necessary to maintain this ''''reverse'''' air flow.
Inventors
- 👤 Clifford A Scogin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:54
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/06; F24H3/065
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
186 words
A room heater adapted to be disposed in a free-standing position within the room space to be heated, and comprising: a. a housing open at both top and bottom directly to the room space to be heated, and including means spacing the open lower end thereof above the floor of said room space, b. a combustion chamber mounted within said housing, an air passage surrounding said combustion chamber and opening through the top and bottom of said housing being formed between said housing and said combustion chamber, c. means operable to burn fuel within said combustion chamber, d. means operable to direct air entering the top of said housing from said room space downwardly through said air passage to be discharged downwardly from the lower end of said housing to said room space, and e. vane means disposed in said air passage and operable to impart a whirling motion to air moving downwardly through said passage around an axis parallel to said downward movement, whereby air is ejected from the lower end of said housing with a motion having both vertically downward and radially outward components.
Claim 2
Dependent Claim
186 words
A room heater adapted to be disposed in a free-standing position within the room space to be heated, and comprising: a. a housing open at both top and bottom directly to the room space to be heated, and including means spacing the open lower end thereof above the floor of said room space, b. a combustion chamber mounted within said housing, an air passage surrounding said combustion chamber and opening through the top and bottom of said housing being formed between said housing and said combustion chamber, c. means operable to burn fuel within said combustion chamber, d. means operable to direct air entering the top of said housing from said room space downwardly through said air passage to be discharged downwardly from the lower end of said housing to said room space, and e. vane means disposed in said air passage and operable to impart a whirling motion to air moving downwardly through said passage around an axis parallel to said downward movement, whereby air is ejected from the lower end of said housing with a motion having both vertically downward and radially outward components.
Claim 3
Dependent Claim
118 words
A room heater as recited in claim 1 wherein said air passage is substantially smaller in cross-sectional flow area than the top opening of said housing; wherein said air directing means constitutes a blower fan operably mounted in said top opening and operating in a circular orbit concentric and coplanar with said opening, and having only a minimum operating clearance therein; and with the addition of vane vanes disposed in said air passage and operable to impart a whirling motion to air moving downwardly through said passage around an axis parallel to said downward movement, whereby said air is ejected from the lower end of said housing with a motion having both vertically downward and radially outward components.
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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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |