Patent US3857671A successfully refreshed from Google Patents.
US3857671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Orchard heater
Assignee: Individual
•
Filing: 1973-02-08
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Granted: 1974-12-31
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Expires: 1993-02-08
Abstract
Abstract A relatively inexpensive, effective orchard heater capable of being used without significantly causing atmospheric pollution can be constructed utilizing an elongated stack, the upper end of which is open and the bottom end of which is closed, with a cover provided with a centrally located opening. A carburetor plate is located so as to extend across the interior of the stack between the ends of the stack and is located so as to be spaced from the interior of the stack. First air holes are located in the stack between the carburetor plate and the upper end of the stack and second air holes are located in the stack away from its lower end beneath the carburetor plate. The openings and the holes are dimensioned with reference to the amount of fuel to be used in the heater so as to permit partial combustion of the fuel beneath the carburetor plate. Such partial combustion causes heating of the stack and of this plate which tends to vaporize the unburned fuel beneath the carburetor plate around it so as to draw in air through the air holes to a sufficient extent so that a flame is created above the upper end of the stack.
Inventors
- 👤 W Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:31
CPC Classifications
A; A01; A01G; A01G13/00; A01G13/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
360 words
An orchard heater which includes: an elongated stack having the shape of a frustrum of a cone, said stack having an uncovered upper end and a lower end, said upper end being of longer diameter than said lower end, a cover having a centrally located opening covering the lower end of said stack, leg means for supporting said stack vertically a support located beneath said opening in said cover, a fuel nozzle located on said support so as to be capable of directing a spray of unburned fuel through said opening without such fuel contacting said cover, the size of said opening being sufficiently small so that the air entering said stack through said opening during the operation of said heater is insufficient to sustain complete combustion of the fuel emitted from said nozzle, an imperforate carburetor plate located across the interior of said stack between said ends of said stack, said carburetor plate having an outer edge uniformly spaced from the interior of said stack, first air holes located in said stack between said carburetor plate and said upper end of said stack, a plurality of second air holes located in said stack beneath said carburetor plate, said second air holes being spaced from said cover, said carburetor plate being the only obstruction located within the interior of said stack and being located between said ends of said stack so that partial combustion of fuel supplied through said nozzle will occur beneath said carburetor plate causing said stack and said carburetor plate to be heated, such heating resulting in the heating of fuel and air within said stack beneath said carburetor plate, said carburetor plate serving to distribute a mixture of air, unburned fuel and combustion products so that said mixture flows around the periphery of said carburetor plate and then upwardly and outwardly from said upper end of said stack past said first air holes so as to burn in a flame extending from said upper end of said stack, and the air necessary to support combustion of the fuel burned in said heater entering said heater through said opening and said first and said second air holes.
Claim 2
Dependent Claim
360 words
An orchard heater which includes: an elongated stack having the shape of a frustrum of a cone, said stack having an uncovered upper end and a lower end, said upper end being of longer diameter than said lower end, a cover having a centrally located opening covering the lower end of said stack, leg means for supporting said stack vertically a support located beneath said opening in said cover, a fuel nozzle located on said support so as to be capable of directing a spray of unburned fuel through said opening without such fuel contacting said cover, the size of said opening being sufficiently small so that the air entering said stack through said opening during the operation of said heater is insufficient to sustain complete combustion of the fuel emitted from said nozzle, an imperforate carburetor plate located across the interior of said stack between said ends of said stack, said carburetor plate having an outer edge uniformly spaced from the interior of said stack, first air holes located in said stack between said carburetor plate and said upper end of said stack, a plurality of second air holes located in said stack beneath said carburetor plate, said second air holes being spaced from said cover, said carburetor plate being the only obstruction located within the interior of said stack and being located between said ends of said stack so that partial combustion of fuel supplied through said nozzle will occur beneath said carburetor plate causing said stack and said carburetor plate to be heated, such heating resulting in the heating of fuel and air within said stack beneath said carburetor plate, said carburetor plate serving to distribute a mixture of air, unburned fuel and combustion products so that said mixture flows around the periphery of said carburetor plate and then upwardly and outwardly from said upper end of said stack past said first air holes so as to burn in a flame extending from said upper end of said stack, and the air necessary to support combustion of the fuel burned in said heater entering said heater through said opening and said first and said second air holes.
Claim 3
Dependent Claim
70 words
An orchard heater as claimed in claim 1 wherein: said carburetor plate and said second air holes are located and the dimensions of said second air holes and said opening are determined with reference to the fuel to be supplied to said heater so that from about 30 to about 50% of the fuel supplied to said heAter will be consumed in the space between said cover and said carburetor.
Claim 4
Dependent Claim
30 words
An orchard heater as claimed in claim 1 wherein: said carburetor plate is located from about one-half to about three-fourths of the distance from said cover to said upper end.
Claim 5
Dependent Claim
93 words
An orchard heater as claimed in claim 1 wherein: said carburetor plate and said second air holes are located and the dimensions of said second air holes and said opening are determined with reference to the fuel to be supplied to said heater so that from about 30 to about 50 percent of the fuel supplied to said heater will be consumed in the space between said cover and said carburetor, and said carburetor plate is located from about one-half to about three-fourths of the distance from said cover to said upper end.
References Cited (Backward Citations)
US2220603A
Cited
US2518689A
Cited
US3364968A
Cited
US3409000A
Cited
US3626924A
Cited
US3737281A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |