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US3670993A Expired / Lapsed US ⏱️ 0.0 years remaining

Compact high capacity burner for hot air balloons

Assignee: United States Department of the Air Force
•
Filing: 1970-10-12
•
Granted: 1972-06-20
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Expires: 1990-10-12
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Abstract

Abstract A burner for a hot air balloon having a conically shaped preheat coil supported by and spaced from a substantially conical shaped flame deflector. A manifold, with a plurality of radially positioned holes which direct the flame toward the flame deflector, is connected to the preheat coil so that fuel is supplied to the manifold through the preheat coil. Air is supplied through holes in the manifold support. Igniters, operated by the pressure of the fuel supplied to the preheat coil, direct a starting flame into the space between the flame deflector and the preheat coil.

Inventors

  • 👤 Byron L Kay
  • 👤 Walter H Thurn Jr

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 14:58
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/46; F23D14/66; B; B64; B64B; B64B1/00; B64B1/58; B64B1/62; Y; Y02; Y02E; Y02E20/00; Y02E20/34

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 199 words
A heater for hot air balloon comprising: a heater manifold; a fuel input line; a fuel preheat coil, wound in a substantially conical configuration, positioned adjacent said manifold and having one end connected to said manifold for supplying fuel thereto; means, including a swivel fuel inlet fitting connected to said fuel input line, for supplying fuel to the other end of said preheat coil; said swivel fuel inlet fitting having an annular internal chamber; means for directing a flow of fuel radially from said manifold; means, responsive to the fuel pressure within said annular chamber, for igniting said fuel; a breakable pressure diaphragm positioned in said swivel fitting between the annular chamber and the input to the preheat coil, whereby the fuel is supplied to the manifold after the Igniters are operated; means, including a substantially conical shaped heat deflector, supported in close substantially parallel spaced relation to the preheat coil, for directing the hot gas from the burning fuel through the preheat coil whereby the fuel is preheated and vaporized and a plurality of support rods pivotably connected to the upper edge of the flame deflector, adapted to be connected to support lines of a hot air balloon.
Claim 2
Dependent Claim 199 words
A heater for hot air balloon comprising: a heater manifold; a fuel input line; a fuel preheat coil, wound in a substantially conical configuration, positioned adjacent said manifold and having one end connected to said manifold for supplying fuel thereto; means, including a swivel fuel inlet fitting connected to said fuel input line, for supplying fuel to the other end of said preheat coil; said swivel fuel inlet fitting having an annular internal chamber; means for directing a flow of fuel radially from said manifold; means, responsive to the fuel pressure within said annular chamber, for igniting said fuel; a breakable pressure diaphragm positioned in said swivel fitting between the annular chamber and the input to the preheat coil, whereby the fuel is supplied to the manifold after the Igniters are operated; means, including a substantially conical shaped heat deflector, supported in close substantially parallel spaced relation to the preheat coil, for directing the hot gas from the burning fuel through the preheat coil whereby the fuel is preheated and vaporized and a plurality of support rods pivotably connected to the upper edge of the flame deflector, adapted to be connected to support lines of a hot air balloon.
Claim 3
Dependent Claim 68 words
The heater for a hot air balloon as recited in claim 1 in combination with a parachute having a vent opening of predetermined size in the top thereof; a hot air balloon suspended above the parachute with its inlet suspended above the vent opening of the parachute; means including said plurality of support rods for suspending the heater within the balloon a predetermined distance above the vent opening.

References Cited (Backward Citations)

US1755602A Cited
US2983312A Cited
US3508725A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-06-20 1975-12-20 1976-06-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-06-20 1979-12-20 1980-06-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-06-20 1983-12-20 1984-06-20 $7700.00 Window Closed / Lapsed

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