Patent US3796209A successfully refreshed from Google Patents.
US3796209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Space heater
Assignee: Individual
•
Filing: 1971-12-21
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Granted: 1974-03-12
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Expires: 1991-12-21
Abstract
Abstract A space heater having a flame induced draft burner including a circular plate baffle provided with a central opening and radially extending fins with associated openings for imparting a rotary motion to an air and fuel mixture, and a combustion chamber arranged to receive mixed air and fuel from the plate baffle. The combustion chamber has a circular baffle member provided with radially extending fins and associated openings for retarding the speed of gases leaving the combustion chamber for ensuring complete combustion of the fuel and high heat transfer between the gases and the baffle member. In this manner, a portion of the baffle member is heated to a sufficient heat to assure spontaneous re-ignition in the event of a temporary interruption of fuel supply. A stackable sleeve having a tapered windshield pipe portion, tapered windshield increaser portion, and tapered exhaust pipe portion, is selectively mountable in symmetrical relation on the burner by frictional engagement with projecting members connected to the burner. The burner is supported by a plurality of legs, and if it is to be supported in the earth, stop members, or bearing plates may be provided on the legs for bearing against the earth surface.
Inventors
- 👤 A Luft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:49
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/006; A; A01; A01G; A01G13/00; A01G13/06; F23; F23D; F23D11/00; F23D11/24
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
191 words
A space heater comprising, in combination: a. means for mixing fuel and a flame induced flow of air and imparting a rotary motion thereto, and including a circular plate provided with a plurality of vanes arranged perpendicular thereto and defining a plurality of peripheral openings for passing air tangentially therethrough; and b. a combustion chamber arranged to receive mixed air and fuel from the mixing means, and having means for retarding speed of gases leaving the combustion chamber for assuring complete combustion of the fuel, said circular plate and vanes partially forming a housing having a pair of spaced end portions, and said mixing means further including a cylindrical baffle arranged concentrically in said housing and extending from a point between the housing end portions to a point at one housing end portion, and a hollow member in the shape of a frustrum of a right circular cone having a cylindrical base dimensioned to mate with said cylindrical baffle and arranged adjacent thereto at said point at one housing end portion for increasing the velocity of mixed air and fuel passing therethrough and establishing a violent mixing in said combustion chamber.
Claim 2
Dependent Claim
191 words
A space heater comprising, in combination: a. means for mixing fuel and a flame induced flow of air and imparting a rotary motion thereto, and including a circular plate provided with a plurality of vanes arranged perpendicular thereto and defining a plurality of peripheral openings for passing air tangentially therethrough; and b. a combustion chamber arranged to receive mixed air and fuel from the mixing means, and having means for retarding speed of gases leaving the combustion chamber for assuring complete combustion of the fuel, said circular plate and vanes partially forming a housing having a pair of spaced end portions, and said mixing means further including a cylindrical baffle arranged concentrically in said housing and extending from a point between the housing end portions to a point at one housing end portion, and a hollow member in the shape of a frustrum of a right circular cone having a cylindrical base dimensioned to mate with said cylindrical baffle and arranged adjacent thereto at said point at one housing end portion for increasing the velocity of mixed air and fuel passing therethrough and establishing a violent mixing in said combustion chamber.
Claim 3
Dependent Claim
100 words
A structure as defined in claim 1, wherein said mixing means further includes a circular plate baffle arranged between said hollow member and said cylindrical baffle and connected to both of same, and provided with an opening concentric with respect to said cylindrical baffle and radially extending fins with associated openings surrounding the concentric opening for imparting the rotary motion to mixed air and fuel passing therethrough, the peripheral openings, baffles, and hollow member defining a flow path that requires air entering through the peripheral opening to pass around the cylindrical baffle, and through the plate baffle and hollow member.
Claim 4
Dependent Claim
70 words
A structure as defined in claim 2, wherein said mixing means further includes an air inlet distributor plate having arms and arranged concentrically in said cylindrical baffle, and nozzle means also arranged concentrically in said cylindrical baffle adjacent said plate baffle for spraying fuel into the flow path and supporting said air distributor plate, the arms of said air inlet distributor plate centering said nozzle means in said cylindrical baffle.
Claim 5
Dependent Claim
61 words
A structure as defined in claim 3, wherein said mixing means further includes a plate covering the other of the housing end portions and having a wall defining an opening for permitting a supply line for said nozzle means to pass therethrough, and a plurality of legs attached to said plate for supporting and anchoring the burner spaced from a surface.
Claim 6
Dependent Claim
24 words
A structure as defined in claim 4, wherein a stop member is provided on said legs for preventing said legs from settling into earth.
Claim 7
Dependent Claim
48 words
A structure as defined in claim 1, wherein said combustion chamber is provided with an outlet and an inlet spaced therefrom and connected to said cylindrical baffle, and said means for retarding is a baffle member covering the combustion chamber outlet and provided with fins in associatEd openings.
Claim 8
Dependent Claim
39 words
A structure as defined in claim 1, wherein said mixing means and combustion chamber form a flame induced draft burner, and the space heater further comprises means selectively mountable on said burner for providing a windshield and exhaust pipe.
Claim 9
Dependent Claim
36 words
A structure as defined in claim 7, wherein the providing means is a stackable tapered sleeve, and means are mounted on said burner for frictionally engaging a wall portion of said tapered sleeve and centering same.
Claim 10
Dependent Claim
181 words
A space heater, comprising, in combination: a. nozzle means for spraying fuel under pressure and providing a flame arranged for inducing a flow of air; b. means for mixing the fuel and induced flow of air and imparting a rotary motion thereto; and c. a combustion chamber arranged to receive mixed air and fuel from the mixing means, and having means for retarding speed of gases leaving the combustion chamber for assuring complete combustion of the fuel, the nozzle means, mixing means, and combustion chamber forming a burner means for inducing a draft solely by flame induction, and mixing means including a plurality of vanes arranged about the circumference of a circle and defining a plurality of peripheral openings for passing air tangentially therethrough, a cylindrical baffle arranged concentrically within said vanes, and a hollow member in the shape of a frustrum of a right circular cone having a base dimensioned to mate with said cylindrical baffle and arranged adjacent thereto for increasing the velocity of mixed air and fuel passing therethrough and establishing a violent mixing in said combustion chamber.
Claim 11
Dependent Claim
181 words
A space heater, comprising, in combination: a. nozzle means for spraying fuel under pressure and providing a flame arranged for inducing a flow of air; b. means for mixing the fuel and induced flow of air and imparting a rotary motion thereto; and c. a combustion chamber arranged to receive mixed air and fuel from the mixing means, and having means for retarding speed of gases leaving the combustion chamber for assuring complete combustion of the fuel, the nozzle means, mixing means, and combustion chamber forming a burner means for inducing a draft solely by flame induction, and mixing means including a plurality of vanes arranged about the circumference of a circle and defining a plurality of peripheral openings for passing air tangentially therethrough, a cylindrical baffle arranged concentrically within said vanes, and a hollow member in the shape of a frustrum of a right circular cone having a base dimensioned to mate with said cylindrical baffle and arranged adjacent thereto for increasing the velocity of mixed air and fuel passing therethrough and establishing a violent mixing in said combustion chamber.
Claim 12
Dependent Claim
53 words
A structure as defined in claim 9, wherein space heater further comprises means removably mountable on the burner for providing a windshield and exhaust pipe, the providing means being a stackable tapered sleeve, and means are mounted on said burner for frictionally engaging a wall portion of said tapered sleeve and centering same.
Claim 13
Dependent Claim
35 words
A structure as defined in claim 10, wherein said combustion chamber is provided with an outlet and said means for retarding is a baffle member covering the outlet and provided with fins and associated openings.
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) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |