U.S. patent application number 13/405163 was filed with the patent office on 2012-08-30 for multi-channel burner assembly simulataneosuly accepting multiple different fuel-air mixtures.
This patent application is currently assigned to Lennox Hearth Products LLC. Invention is credited to Kamal Al-Farran, Joseph A. Benedetti, Kenneth D. Johns.
Application Number | 20120216794 13/405163 |
Document ID | / |
Family ID | 46718146 |
Filed Date | 2012-08-30 |
United States Patent
Application |
20120216794 |
Kind Code |
A1 |
Benedetti; Joseph A. ; et
al. |
August 30, 2012 |
MULTI-CHANNEL BURNER ASSEMBLY SIMULATANEOSULY ACCEPTING MULTIPLE
DIFFERENT FUEL-AIR MIXTURES
Abstract
A burner assembly comprising a burner casing having two or more
separate chambers therein, the chambers being divided from each
other by one or more walls. The assembly also comprises one or more
input conduits each configured to deliver different fuel-air
mixtures to at least one of the separated chambers.
Inventors: |
Benedetti; Joseph A.;
(Nashville, TN) ; Johns; Kenneth D.; (Chapel Hill,
TN) ; Al-Farran; Kamal; (Nolensville, TN) |
Assignee: |
Lennox Hearth Products LLC
Nashville
TN
|
Family ID: |
46718146 |
Appl. No.: |
13/405163 |
Filed: |
February 24, 2012 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
61446939 |
Feb 25, 2011 |
|
|
|
Current U.S.
Class: |
126/512 ;
126/547; 29/890.02; 431/278; 431/354 |
Current CPC
Class: |
F23D 14/10 20130101;
F24B 1/192 20130101; Y10T 29/49348 20150115; F23D 2213/00 20130101;
F24B 1/181 20130101; F24B 1/1808 20130101; F23D 14/70 20130101;
F24B 1/1957 20130101; F24B 1/18 20130101; F24B 1/198 20130101; Y10T
29/49 20150115; F23D 14/46 20130101; F24B 1/195 20130101; F24C 3/08
20130101; Y10T 29/4935 20150115; F24C 3/006 20130101; Y10T 29/49826
20150115 |
Class at
Publication: |
126/512 ;
431/278; 431/354; 126/547; 29/890.02 |
International
Class: |
F24B 1/199 20060101
F24B001/199; B21D 53/00 20060101 B21D053/00; F24B 1/192 20060101
F24B001/192; F23D 23/00 20060101 F23D023/00; F23D 14/46 20060101
F23D014/46 |
Claims
1. A burner assembly, comprising: a burner casing having two or
more separate chambers therein, the chambers being divided from
each other by one or more walls; and one or more input conduits
each configured to deliver different fuel-air mixtures to at least
one of the separated chambers.
2. The assembly of claim 1, wherein the burner casing includes a
upper pan half and a lower pan half which are configured to fit
together to define the separate chambers therein.
3. The assembly of claim 1, wherein the burner casing includes: one
or more sets of porting holes on one side of the burner casing, the
different sets of porting holes configured to feed the fuel-air
mixture from one of the chambers into a viewing portion of a
heating apparatus; and intake holes on the opposite side of the
burner casing configured to receive the fuel-air mixtures from one
of the input conduits.
4. The assembly of claim 1, wherein at least a first one of the
separate chambers intertwines with at least a second one of the
isolated chambers.
5. The assembly of claim 1, wherein a surface of the one or more
input conduits rests on a surface of the burner casing, and an
opening in the conduit surface is aligned with an intake hole in
the burner casing such that the fuel-air mixture in the input
conduit can flow into one or more of the chambers.
6. The assembly of claim 1, wherein the one or more input conduits
includes separate input conduits, each input conduit having a
separate air input window, and each of the separate input conduits
are coupled to a separate input fuel line such that one of the
input conduits delivers a first fuel-air mixture to a first one of
the chambers and a second one of the conduits delivers a second
fuel-air mixture to a second one of the chambers.
7. The assembly of claim 1, wherein at least one of the input
conduits has a divider therein, the divider separating an input
fuel flow into separate cavities, each of the cavities having a
separate air flows thereto, one of the cavities delivering a first
fuel-air mixture to a first one of the chambers and a second of the
cavities delivering a second fuel-air mixture to a second one of
the chambers.
8. The assembly of claim 7, wherein an input fuel line coupled to
the at least one input conduit has two orifices the each separately
deliver fuel to the separate cavities.
9. The assembly of claim 1, wherein a portion of at least one of
the walls between two of the chambers separates flows of the
different fuel-air mixtures from a first one of cavities and a
second one of the cavities to the first chamber and the second
chamber, respectively.
10. The assembly of claim 1, wherein the burner casing has three
separate chambers, first and second ones of the chambers receiving
two of the different fuel-air mixtures from a first one of the
input conduits, and a third one of the chambers receiving one of
the different fuel-air mixtures from a second one of the input
conduits.
11. The assembly of claim 1, wherein the different fuel-air
mixtures includes a first fuel-air mixture and a second fuel-air
mixture provided from a same flow rate of fuel and two different
flow rates of air, respectively.
12. The assembly of claim 1, wherein the different fuel-air
mixtures includes a first fuel-air mixture and a second fuel-air
mixture provided from a same flow rate of air and two different
flow rates of fuel, respectively.
13. The assembly of claim 1, wherein the different fuel-air
mixtures includes a first fuel-air mixture having an air-to-fuel
volume ratio that is in a range of about 1:2 to about 1:3, and a
second fuel-air mixture having an air-to-fuel volume ratio that is
in a range of about 1:1 to 2:1.
14. A fuel-fired heating apparatus, comprising: a viewing insert
located in an heating zone of the apparatus; and a burner assembly
located under the viewing insert, the burner assembly including: a
burner casing having two or more separate chambers therein, the
chambers being divided from each other by one or more walls; and
one or more input conduits each configured to deliver different
fuel-air mixtures to at least one of the separated chambers.
15. The apparatus of claim 14, wherein a first set of porting holes
in the top of the burner casing receiving an air-rich fuel-air
mixture from one of the chambers are adjacent to the viewing insert
are configured to produce a blue flame to thereby cause the viewing
insert to glow when the air-rich fuel-air mixture is combusted,
and, a second set of porting holes in the top of the burner casing
receiving a fuel-rich fuel-air mixture from another one of the
chambers are configured to provide a yellow flame when the
fuel-rich fuel-air mixture is combusted.
16. The apparatus of claim 14, wherein the apparatus is configured
as a fireplace, a stove, or a fire-pit.
17. The apparatus of claim 14, wherein the viewing insert is
configured as an artificial log-set or embers.
18. A method of manufacturing a burner assembly, comprising:
providing a burner casing having two or more separate chambers
therein, the chambers being divided from each other by one or more
walls; and coupling one or more input conduits, each configured to
deliver different fuel-air mixtures, to at least one of the
separated chambers.
19. The method of claim 18, wherein providing a burner casing
includes coupling an upper pan half to a lower pan half to form the
separate chambers therein.
20. The method claim 18, wherein coupling the one or more input
conduits includes coupling at least one of the input conduits to
two of the chambers.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims the benefit of U.S. Provisional
Application Ser. No. 61/446,939, filed by Joseph A. Benedetti et
al. on Feb. 25, 2011, entitled, "IMPROVED LINEAR FIREPLACE WITH
BURNER," commonly assigned with this application and incorporated
herein by reference.
TECHNICAL FIELD
[0002] This application is directed, in general, to heating
apparatuses and, more specifically, to a burner assembly of a
heating apparatus, and to a method of manufacturing the burner
assembly.
BACKGROUND
[0003] For various fuel-fired heating apparatuses, such as gas or
propane fireplaces, it is sometimes desirable to simultaneously
produce a flame with mixed characteristic, e.g., a highly visible
yellow flame, and, a hot blue flame to cause a viewing insert,
e.g., artificial logs or embers, to glow. Traditionally, to achieve
this goal, either a compromising fuel-air mixture has to be
accepted, or, multiple burner assemblies each with different
fuel-air mixtures have to be used, at increased component cost and
complication to assemble and adjust. The latter solution also
compromised the flame's characteristics because multiple burner
elements cannot occupy the same space, and therefore certain
regions of the viewing insert can have one or the other types of
flames, but not both.
SUMMARY
[0004] One embodiment of the present disclosure is a burner
assembly for a fireplace. The assembly comprises a burner casing
having two or more separate chambers therein, the chambers being
divided from each other by one or more walls. The assembly also
comprises one or more input conduits each configured to deliver
different fuel-air mixtures to at least one of the separated
chambers.
[0005] Another embodiment is a fuel-fired heating apparatus,
comprising a viewing insert located in a heating zone of the
apparatus and the above-described burner assembly located under the
viewing insert.
[0006] Another embodiment is method of manufacturing a burner
assembly. The method comprises providing a burner casing having two
or more separate chambers therein, the chambers being divided from
each other by one or more walls. The method also comprises coupling
one or more input conduits, each configured to deliver different
fuel-air mixtures, to at least one of the separated chambers.
BRIEF DESCRIPTION OF THE DRAWINGS
[0007] Reference is now made to the following descriptions taken in
conjunction with the accompanying drawings, in which:
[0008] FIG. 1A presents a perspective underside view of an example
upper half of an example a burner casing of an example burner
assembly of the disclosure;
[0009] FIG. 1B presents a perspective topside view of the upper
half of the example casing depicted in FIG. 1A;
[0010] FIG. 2A presents a perspective topside view of an example
lower half of an example burning casing of and example burner
assembly of the disclosure;
[0011] FIG. 2B presents a perspective underside view of the lower
half of the example casing depicted in FIG. 2A;
[0012] FIG. 2C presents a perspective topside view of an
alternative example lower half of an example burning casing of and
example burner assembly of the disclosure;
[0013] FIG. 2D presents a perspective underside view of the lower
half of the example casing depicted in FIG. 2D; and
[0014] FIG. 3 presents a perspective front view of an example
fuel-fired heating apparatus of the disclosure including an example
burner assembly of the disclosure, such as any of the example
burner assemblies discussed in the context of FIGS. 1A-2B; and
[0015] FIG. 4 presents a flow diagram of an example method of
assembling a burner assembly of the disclosure, including any of
the example embodiment burner assemblies discussed in the context
of FIGS. 1A-3.
DETAILED DESCRIPTION
[0016] The term, "or," as used herein, refers to a non-exclusive
or, unless otherwise indicated. Also, the various embodiments
described herein are not necessarily mutually exclusive, as some
embodiments can be combined with one or more other embodiments to
form new embodiments.
[0017] Embodiments of the present disclosure provide a burner
assembly that provides a multi-channel burner casing which allows
multiple fuel-air ratios to be delivered to desired portions of the
burner assembly. The multiple channels facilitate the formation of
a combination of tall visible flames and hot blue flames imparting
glow to a viewing insert. Some embodiments of the burner assembly
allow both types of flame to co-exist in substantially the same
space. Additionally, the burner assembly with the multi-channel
burner casing is more cost effective to produce, efficient to
assemble, and easier to adjust get the desire flame
characteristics, than burner assemblies with multiple separate
burners and component parts.
[0018] One embodiment of the present disclosure is a burner
assembly 100 such as depicted in FIGS. 1A-2D. FIG. 1A presents a
perspective underside view of an example upper pan half 105 of an
example burner casing 110 of the disclosure, and FIG. 1B presents a
perspective topside view of the upper pan half 105 of the example
casing 110 depicted in FIG. 1A. FIG. 2A presents a perspective
topside view of an example lower pan half 205 of an example burner
casing 110 of the disclosure, and FIG. 2B presents a perspective
underside view of the lower pan half 205 of the example casing 110
depicted in FIG. 2A. FIG. 2C presents a perspective topside view of
an alternative example lower pan half 205 of an example burner
casing 110 of an example burner assembly 100 and FIG. 2D presents
the corresponding perspective underside view of the lower pan half
205 of the example casing 110.
[0019] With continuing reference to FIGS. 1A-2D throughout, the
burner assembly 100 comprises a burner casing 110 having two or
more separate chambers (e.g., chambers 120, 122, 124) therein, the
chambers 120, 122, 124 being divided from each other by one or more
walls 130. The assembly 100 also comprises one or more input
conduits 220, 222, 224 each configured to deliver different
fuel-air mixtures to at least one of the separated chambers 120,
122, 124.
[0020] The term separate chamber, as used herein, means that the
fuel-air mixture in one chamber (e.g., chamber 120) is isolated
from and does not mix with the different fuel-air mixture in any
other chamber (e.g., either of chamber 122 or chamber 124). The
term input conduit, as used herein, refers to a hollow structure
configured to receive fuel (e.g., natural gas, propane, butane or
similar fuels) from an input supply line (e.g., lines 230, 232,
234) and to entrain air with the jet flow of fuel to the conduit
220, 222, 224. In some cases, one or more of the input conduits
220, 222, 224 can have a Venturi configuration to facilitate
acceleration of fuel flow there-through.
[0021] In some embodiments the burner casing 110 can include an
upper pan half 105 and lower pan half 205 which are configured to
fit together to define the chambers 120, 122, 124 therein. In some
case such as shown in FIGS. 1A-2B one half (e.g., lower pan half
205) can be flat sheet the other half (e.g., upper pan half 105)
can be a sheet which include all of the walls 130 therein. In other
cases both pan halves 105, 205 could include different portions of
the walls 130 to form the chambers 120, 122, 124.
[0022] In some embodiments, wherein the burner casing 110 include
one or more sets 140 of porting holes 142 on one side of the burner
casing 110 (e.g., the upper pan half 105), the different sets of
porting holes 142, e.g., configured to feed the fuel-air mixture
from one of the chambers into a viewing portion of a heating
apparatus, as further discussed in the context of FIG. 3 below. The
burner casing 110 includes intake holes 240 on the opposite side
(e.g., a surface 242 of the lower pan half 205; FIG. 2B) of the
burner casing 110 configured to receive the fuel-air mixture from
one of the input conduits 220, 222, 224.
[0023] As illustrated in FIG. 1A, in some embodiments at least a
first one of the separate chambers intertwines with at least a
second one of the isolated chambers. For instance, the walls 139
defining the chambers 120, 122, 124 can follow a serpentine pathway
and in some cases adjacent chambers 120, 122, 124 can share a wall
130. For instance, in a common plane of the upper pan half 105,
chamber 120 can intertwine with chamber 122 or chamber 124 or
both.
[0024] Intertwining the chambers 120, 122, 124, facilitates the
precise placement of hot, blue "lean" flame, from burning air-rich
fuel-air mixtures to one chamber (e.g., chamber 122) to generate
glow in a viewing insert of a heating apparatus (e.g., an
artificial log-set of a fireplace), and, the simultaneous precise
placement of tall visible yellow flames from burning a fuel-rich
fuel-air mixtures to another chamber (e.g., chamber 124). By
intertwining the chambers 122, 124 and their corresponding sets of
porting holes 142 the hot blue flame and the large yellow can be
configured to occupy substantially the same volume of space.
Intertwining chambers 120, 122, 124 can facilitate interlacing
areas of glowing portions of the viewing insert and the visible
flame.
[0025] As illustrated in FIGS. 2A and 2C in some embodiments, the
input conduit 220, 222, 224 can be or include a pyramidal-shaped
tube, although other shaped tubes (e.g., a hollow
cylindrically-shaped tube) could be used. In some cases, as
illustrated in FIG. 2A a surface 238 of the one or more input
conduits 220, 222, 224 (e.g., a planar surface 238, such as
advantageously provided by pyramidal-shaped tube) rests on a
surface 247 of the burner casing 110 (e.g., the planar surface 247
of the lower pan half 205). One or more openings 245, 247, 249 in
each of the conduit's 220, 222, 224 surface 238 and one of the
intake holes 240 in the burning casing 110 (e.g., lower pan half
205 depicted in FIG. 2B) are aligned such that the fuel-air mixture
in the input conduit 220 can flow into one or more of the chambers
120, 122, 124.
[0026] As illustrated in FIG. 2A, in some cases, there are separate
input conduits 220, 222 224, each input conduit having a separate
air input window (e.g., windows 250, 252, 254, and each of the
separate input conduits 220, 222, 224 are coupled to separate input
fuel lines 230, 232, 234 such that one of the input conduits 220,
222, 224 delivers a first fuel-air mixture to a first one of the
chambers (e.g., conduit 220 delivers to chamber 120) and a second
one of the conduits delivers a second fuel-air mixture to a second
one of the chambers conduit 222 delivers to chamber 122) and so one
(e.g., a third conduit 224 delivers to third chamber 124).
[0027] By adjusting the size of the windows 250, 252, 254 different
fuel-air mixtures can be delivered to the different chambers 120,
122, 124. For instance, the different fuel-air mixtures includes a
first fuel-air mixture and a second fuel-air mixture provided from
a same flow rate of fuel and two different flow rates of air (e.g.,
due to different sized windows 250, 252), respectively. For
instance, in some cases the conduits can include an adjustable
covering for one or more of the windows (e.g., coverings 256, 258
for windows 252, 254, respectively) to adjust the size of the
window. Alternatively, the separate input conduits 220, 222, 224
could have different numbers of same-sized windows 250, 252, 254 to
produce different fuel-air mixtures. Alternatively the sizes of the
windows 250, 252, 254 could all be the same, and the size of an
orifice (e.g., the diameter of cylindrical orifices 260, 262, 264)
could be adjusted to produce different fuel-air mixtures. For
instance, the different fuel-air mixtures includes a first fuel-air
mixture and a second fuel-air mixture provided from a same flow
rate of air and two different flow rates of fuel (e.g., due to
differently-sized orifices 262, 264, respectively).
[0028] In some embodiments, the different fuel-air mixtures
includes a first fuel-air mixture having an air-to-fuel volume
ratio that is in a range of about 1:2 to about 1:3, and a second
fuel-air mixture having an air-to-fuel volume ratio that is in a
range of about 1:1 to 2:1. Based on the present disclosure one of
ordinary skill in the art would appreciate the numerous alternative
to produce different fuel-air mixtures.
[0029] Alternatively, as illustrated in FIG. 2C, in some cases, at
least one of the input conduits (e.g., conduit 222 in FIG. 2C) has
a divider 270 therein, the divider separating an input fuel flow
(e.g., fuel flow from input line 232 into separate cavities (e.g.,
cavities 272, 274), each of the cavities 262, 264 having a separate
air flows thereto (e.g., via separate windows 275, 277, and the
optional coverings shown in FIG. 2A). One of the cavities 262
delivers a first fuel-air mixture to a first one of the chambers
(e.g., chamber 222) and a second of the cavities 274 delivers a
second fuel-air mixture to a second one of the chambers (e.g.,
chamber 224).
[0030] As further illustrated in FIG. 2C an input fuel line,
coupled to the at least one input conduit (e.g., fuel line 232
coupled to conduit 222), has two orifices 262, 264 that each
separately deliver fuel to the separate cavities 272, 274. In some
cases, as further illustrated in FIG. 1A and FIG. 2C, a portion 150
of at least one of the walls 130 between two of the chambers (e.g.,
chambers 122 and 124) separates flows of the different fuel-air
mixtures from a first one of cavities 262 and a second one of the
cavities 264 to the first chamber 122 and the second chamber 124,
respectively (e.g., via openings 247, 249).
[0031] Using a conduit 222, with the divider 270 therein, allow the
elimination some component parts while still achieving the
distribution of different fuel-air mixtures to different chambers.
For instance, the burner casing 110 can three separate chambers,
first and second ones of the chambers 122, 124 receiving two of the
different fuel-air mixtures from a single first one of the input
conduits 222. Of course, other conduits could be configured as
illustrated in FIG. 2A. For instance for the embodiment shown in
FIG. 2C, a third one of the chambers 120 can receive one of the
different fuel-air mixtures from a second one of the input conduits
220, configured the same as that discussed in the context of FIG.
2A.
[0032] Another embodiment of the disclosure is fuel-fired heating
apparatus. FIG. 3 presents a perspective front view of an example
fuel-fired heating apparatus 300 of the disclosure including an
example burner assembly 100 of the disclosure, such as any of the
example burner assemblies 100 discussed in the context of FIGS.
1A-2D.
[0033] For instance, the apparatus 300 comprises a viewing insert
310 located in a heating zone 315 of the apparatus 300. The
apparatus 300 also comprises a burner assembly 100 located under
the viewing insert 310. The burner assembly 100 includes a burner
casing 110 having two or more separate chambers 120, 122, 124
therein, the chambers being divided from each other by one or more
walls 130 (FIG. 1A). The assembly 100 also includes one or more
input conduits 220, 222 each configured to deliver different
fuel-air mixtures to at least one of the separate chamber 120, 122,
124.
[0034] For instance, some embodiments of the apparatus 300 includes
a first set 320 of porting holes 142 in the top surface 322 of the
burner casing 110 receiving an air-rich fuel-air mixture from one
of the chambers (e.g., one of chambers 120, 122, 124) are adjacent
to parts of the viewing insert 310 are configured to produce a blue
flame to thereby cause the viewing insert to glow when the air-rich
fuel-air mixture is combusted. In some embodiments, a second set
325 of porting holes 142 in the top surface 322 of the burner
casing 110 receiving a fuel-rich fuel-air mixture from another one
of the chambers (e.g., a different one of chambers 120, 122, 124)
are configured to provide a yellow flame when the fuel-rich
fuel-air mixture is combusted
[0035] In some embodiments, the apparatus 300 is apparatus is
configured as a fireplace, a stove, or a fire-pit. In some
embodiments, the viewing insert 310 is configured as an artificial
log-set or embers. In some embodiment, the apparatus 300 includes a
viewing window 330 in a firebox 335 through which the viewing inset
330 is visible.
[0036] As further illustrated in FIG. 3 the apparatus 300 can
further include input fuel lines (e.g., lines 230, 232, 234 each
coupled to one of the conduits (e.g., conduits 220, 222, 224). The
input fuel lines 230, 232, 234 can be coupled to a valve 340 (e.g.,
a solenoid valve) configured to regulate fuel flow from a primary
line 345 (e.g., the gas or propane line of a building).
[0037] Another embodiment of the present disclosure is a method of
manufacturing a burner assembly, such as any of the assemblies 100
discussed in the context of FIGS. 1A-3. FIG. 4 presents a flow
diagram of an example method of assembling a burner assembly of the
disclosure, including any of the example embodiment burner
assemblies 100 discussed in the context of FIGS. 1A-3. With
continuing reference to FIGS. 1A-3 throughout, the example method
400 comprises a step 410 of providing a burner casing 110 having
two or more separate chambers (e.g., chambers 120, 122, 124)
therein, the chambers 120, 122, 124 being divided from each other
by one or more walls 130. The method 400 also comprises a step 420
of coupling one or more input conduits (e.g., conduits 320, 322,
324), each conduit configured to deliver different fuel-air
mixtures, to at least one of the separated chambers 120, 122,
124.
[0038] In some embodiments of the method 400 the step 410 of
providing the burner casing 110 includes a step 430 coupling an
upper pan half 105 to a lower pan half 205 to form the separate
chambers 120, 122, 124 therein. For instance, outer portions 160,
280 (FIGS. 1A, 2A) of the pan halves 105, 205, e.g., outer edges,
can be welded, clamped, screwed, or bolted together.
[0039] In some embodiments of the method 400 the step 410 of
providing the burner casing 110 includes a step 435 of forming
different sets 320, 325 of porting holes 142 in a major surface 170
of the upper pan half 105, where each of the different sets 320,
325 of porting holes 142 open into one of the chambers 120, 122,
124.
[0040] In some embodiments of the method 400 the step 410 of
providing the burner casing 110 includes a step 440 of forming
intake holes 240 in a bottom surface of the pan lower half 205.
Each of the intake holes 204 are configured to open into one or
more of the chambers 120, 122, 124. In some cases, one of the
intake holes 240 straddles two of the chambers and thereby opens
into the two chambers (e.g., chambers 122, 124 in FIG. 2C).
[0041] In some embodiments of the method 400 the step 410 of
providing the burner casing 110 includes a step 445 of forming
chamber walls 130 on a major surface 170 of the upper pan half 105
or a major surface 242 of the lower pan half 205. For instance,
parts of a material layer (e.g., a metal, ceramic or other
noncombustible material) can be machined or molded to define the
walls 130. In other embodiments, drawing or extrusion process can
be used alternatively or additionally.
[0042] In some embodiment of the method 400, the step 420 of
coupling the one or more input conduits 220, 222, 224 includes a
step 450 of coupling at least one of the input conduits (e.g., the
conduit 232 in FIG. 2C having a divider 260 placed therein) to two
of the chambers (e.g., chambers 124, 126).
[0043] Some embodiment of the method 400, can further include a
step 455 of coupling each of the one input conduits 220, 222, 224
to an input fuel line (e.g., lines 230, 232, 234)
[0044] Those skilled in the art to which this application relates
will appreciate that other and further additions, deletions,
substitutions and modifications may be made to the described
embodiments.
* * * * *