US3877863A — Apparatus for effecting controllable vaporization…

Claim 1

Independent Claim 198 words

Apparatus for effecting controllable vaporization of vaporific liquid fuel in a stream of hot air or other oxidant flowing through a duct comprising flameholding means positioned in the duct and extending transversely of the flow path therethrough of the stream of oxidant to create a region of reduced pressure in which vaporized fuel can be ignited and will burn in the stream of oxidant, means defining a region externally of said duct, the flame-holding means comprising a heat exchanger communicating with said external region, means for passing a stream of air through said external region at a temperature lower than said heat exchanger positioned in the duct, whereby heat transfer will occur along the flame-holding means to said external region at a rate dependent upon the temperature sensed downstream of said heat exchanger by a temperature sensor and valve means controlled by said temperature sensor to vary the rate of flow of air through said external region and hence the rate of heat transfer and the rate of vaporization of fuel in the duct, the apparatus also including means for introducing liquid fuel into the region of reduced pressure and ignition means positioned downstream of said flameholding means.

Claim 2

Dependent Claim 198 words

Apparatus for effecting controllable vaporization of vaporific liquid fuel in a stream of hot air or other oxidant flowing through a duct comprising flameholding means positioned in the duct and extending transversely of the flow path therethrough of the stream of oxidant to create a region of reduced pressure in which vaporized fuel can be ignited and will burn in the stream of oxidant, means defining a region externally of said duct, the flame-holding means comprising a heat exchanger communicating with said external region, means for passing a stream of air through said external region at a temperature lower than said heat exchanger positioned in the duct, whereby heat transfer will occur along the flame-holding means to said external region at a rate dependent upon the temperature sensed downstream of said heat exchanger by a temperature sensor and valve means controlled by said temperature sensor to vary the rate of flow of air through said external region and hence the rate of heat transfer and the rate of vaporization of fuel in the duct, the apparatus also including means for introducing liquid fuel into the region of reduced pressure and ignition means positioned downstream of said flameholding means.

Claim 3

Dependent Claim 22 words

Apparatus as claimed in claim 1 in which the flame-holding means comprises at least one elongate member having an impervious external surface.

Claim 4

Dependent Claim 35 words

Apparatus as claimed in claim 2 in which there is a plurality of elongate members extending substantially parallel with each other and spaced apart by small distances to effect restriction of flow through the duct.

Claim 5

Dependent Claim 35 words

Apparatus as claimed in claim 3 in which each elongate member is hollow and a quantity of coolant fluid is sealed therewithin, whereby heat transfer is effected by convection flow of coolant within each member.

Claim 6

Dependent Claim 18 words

Apparatus as claimed in claim 1 in which the flame-holding means is a block of heat-conductive porous material.

Claim 7

Dependent Claim 154 words

Apparatus for effecting controllable vaporization of vaporific liquid fuel in a stream of hot air or other oxidant flowing through a duct comprising flame-holding means positioned in the duct and extending transversely to the flow-path therethrough of the stream of oxidant to create a region of reduced pressure in which vaporized fuel can be ignited and will burn in the stream of oxidant, the flame-holding means comprising a plurality of elongate tubular members each having means by which coolant fluid is passed through said tubular members, the tubular members extending substantially parallel to each other and spaced apart by small distaNces to effect restriction of flow through the duct, means regulating the supply of coolant fluid through said tubular members in response to the temperature sensed downstream of said flameholder, the apparatus also including means for introducing liquid fuel into the region of reduced pressure and ignition means positioned downstream of the flameholding means.

Claim 8

Dependent Claim 154 words

Apparatus for effecting controllable vaporization of vaporific liquid fuel in a stream of hot air or other oxidant flowing through a duct comprising flame-holding means positioned in the duct and extending transversely to the flow-path therethrough of the stream of oxidant to create a region of reduced pressure in which vaporized fuel can be ignited and will burn in the stream of oxidant, the flame-holding means comprising a plurality of elongate tubular members each having means by which coolant fluid is passed through said tubular members, the tubular members extending substantially parallel to each other and spaced apart by small distaNces to effect restriction of flow through the duct, means regulating the supply of coolant fluid through said tubular members in response to the temperature sensed downstream of said flameholder, the apparatus also including means for introducing liquid fuel into the region of reduced pressure and ignition means positioned downstream of the flameholding means.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1978-04-14	1978-10-14	1979-04-15	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1982-04-14	1982-10-14	1983-04-15	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1986-04-14	1986-10-14	1987-04-15	$7700.00	Window Closed / Lapsed

Apparatus for effecting controllable vaporization of liquid

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