US2886100A - Industrial automatic oil burner or the like - Google Patents

Description

y 1959 F. MRos, JR

INDUSTRIAL, AUTOMATIC OIL BURNER OR THE LIKE 2 Sheets-Sheet -1 Filed Sept.

FIG. 2

INVENTOR FREDRICK MROS. JR.

HIS ATTORNEY May 12, 1959 F. M-ROS, JR

' INDUSTRIAL. AUTOMATIC von. BURNER OR THE LIKE 2 Sheets-Sheet 2 Filed S ep t.

mvmw E .omwn. 7

.il|lllllllllllli mu ls FREDRICK MROS. JR.

BY W W HIS ATTORNEY S sPa fi o 2386,1001 INDUSTRIAL AU roMArioo'IL"BURNER'oR t v THE LIKE r Ffediick Mr6s',-Jr., Salt LalreiCity, Utah Application September 30, 1957, Serial No. 687,135 9 61m (Ci. 1ss 77) This inverition relates to industrial, a utdrn'atic oil burners of the rotary-cup type, and more'pertic'u larly-to a new and improved industrial burner capable of handling upato and'including number siir. industrial fnel oil and pfrdvided with a type of-air injection in the Yrotary fuel Heretofore, a great number of industrial oil burners of the rotary-cup type have been developed. In the ope'i'a tion of conventional burners; industrial fuel oil is introreaching the mouth of thefcup, an ignition flame is intro auxiliary burner. on reaching the mouth or lip of the cup, the fuel oil is atomized by the air masters as "to en ablerapid and complete oxidation and combustion f the fru'e'i oil hpon-ig-hition'thereof by the flame bribe atmlitiry bili'ilf.

In the recent past, the inventor has devised an'ifii ra ed, industrial oil burner system which isf11lly auto: matic in it's starting cycle and general operation; In'this improved system, number siir industrial fuel il, for example, ispre-heated in an in einiediate reservoir to about twohund'red'fifty degrees Fahrenheitj's'o" s to redu the oils viscosity. Thefuel oilis inti odncedlnto the ato izing cupof the burner by means of a valve, which valve s closed during the first portion of the starting cycle. D'ur ing this first portion of the starting cycle, the preheated fuel oil is pumped into' the intake line of the bui-ner and (since the valve is closedl thrC'iighthe re'tilrnline (to the intermediate reservoir) so as to purge these lines of any cold, viscous fuel oil which inay have remained in the lines since the previous lir ingofthe burner. Afterall old oil is purged from the aforementioned lines, a temperature sensitive control in the return line is actuated, by reason of the high temperature of the newly introduced fuel oil, so as, in turn, to actuate a bloweffor supplying the aforementioned air blast. Subsequently, the auiiiliary burner is ignited and the fuel valve inside atoiriizing opens, causing fueloil to be introduced into the cup for ultimate combustiom'as; above explained. y

While the oil burner systern abovedescribed infbrie f isthought to be a notable advance in the industrial, oil burner art, yet, further improvement in performance'of the burner can be attained by eliminating all possibility rotary cup which might otherwise occiirand this is true of all burnerseither durin'g' normal operationof the burner or during the cooling interval immediately there after. Further, it wouldbe highly desirable to prevent seepageof fuel oil introduced into the cup, rearwardly into burnerapparatusbearing mounts. Additionally,it

up 2,886,100 Patented May 12,1{159 would be desirable to render the fuel layer in the cupas thin as possible, so as to render atomization andcombus tion of the fuel oil as complete as possible.

Accordingly, it is an object of the present invention to provide a new andimproved industrial burner of the rotary cup type. a t t 'It is an additional object to provide anew typerotary cup burner in which crust formation on a conventional rotary cup is avoided, both duringjactual operation of the burner and during the cooling period immediately following. i t t It is 'an additional object of p the present invention to provide an industrial burner of the rotary-cupftype in which fuel oil seepageintothe bearings of the burner ap= paratus isavoided. t s

m It is a stilljfurther object of the present invention to provide an industrial burner of the grotary cup type in which atomization of fuel oilprogressing outwardly of the cup is enhancedy t it t r t fit is an additionalobject to provide aniairinjection, fuel valve device incorporating features accomplishing all of the foregoing objects, which device may be incorporated into any conventional, rotary cup burner. t

According to the present invention, an industrial burner of the rotary-cup type is provided with means for acacommodatingthe introductionjof forced air within the atomizing cup proper, the forced air being directed gen erally towardthcmouth orlip of the atomizing cup. The forced air keeps the atoniizing cupfcool during burner operation and may be left on during the cooling period of the burner so as to prevent unwanted, burnt oil-coke deposits on theinterior of the cup: This air injectio'n the atoniizing cup may be accomplished by means ofta bafi le perforate on the outer surface thereof; :th e baiflle additionally serving: to preventseepage of fueLoil: rearwardly into burner bearings. The 'bafiie orifices may be so disposed that the air streams therefrom will tend to red, e-th'e thickness of the fuel layer on the interior wall s'i face of the cup and to urge the fuel layer outwardly therefrom. p l I p M The features of the pre sent invention which arej believed to be novel are se t forthwith particularity in the 3P2- pended claims. The pres entinvention; bothas to its organization and manner of; operation, together with further objects and advantages thereof, may best be understood byiererape to the following description, takendn connection with the accompanyingydrawings in which: a

Figure} is afront elevation view ofan industrial autor'n'aticoil burner according to the present invention, Figure; 2 is a side elevation of the apparatus shown in Figure 1 looking from the left side thereof.

Figure 3 is a sectional view of the apparatus, taken along the line 3-3 in Figure 2, showing with particular; ify the novel valve invention. H t a Figure 4 is a sectional view taken along the line"4t-4 inFigu r e 3. i

In the drawings:

Housing 10 is composed of a series of'castingsfasisile' lustrated with particularity in Fig. 3. Housing 10 is pr0-' vided with a cylindrical opening 11 into which' is fitted slide tube12, afiixed to housing 10 by means of screw 132 Motor housing 14 is provided with a cylindrical opening 15; corresponding to opening 11; which'is adaptedto slide along slide tube"1 2. Motor housing14, when b'utting againsthousing 10; is afii xed in place by means of the cooperation of threaded locking screw 16 with tapered aperture 17 disposed in the wall of slide tube 12.

construction utilized by. the present low output member 19, which may be flanged, as shown in Figure 3.

Bolted to the flanged portion of motor output member 19 is an extension sleeve 20. Flange 21 is threaded into extension ;'sleeve.20 to affix in place the outer race of bearing 22. The outer race of bearing 23 is aflixed in place by means of the flanged abutment of motor output member 19. Bolted to flange 21 is a radial atomizing cup 24. Atomizing cup 24 is provided with an outwardly turned lip portion or mouth 25 and also includes a base flange 26 for bolt connection.

Extending coaxially through motor output member 19 and extension sleeve 20 is an interior sleeve 27 which provides circumferential mounts for the inner races of bearings 22 and 23. The inner race of bearing 22 is tightened in place by means of threaded ring 28. Interior sleeve 27 may be securely fitted into the motor housing and secured thereto by means of flange 29 and bolts 30.

- The heart of the present invention resides in the design of' the apparatus disposed interiorly of interior sleeve 27. This apparatus consists of three coaxial conduit members which are preferably tubular in conformation. These are: outer conduit member 31, intermediate member 32, and inner conduit member 33. The ends of outer conduit member 31 are flared inwardly and welded or otherwise afiixed to the outer surface of intermediate member 32. The space enclosed between outer conduit member '31 and intermediate conduit member 32 is provided to supply passage -for forced air introduced at air connection 34 A circumferential series of apertures 36 disposed in the wall of outer conduit member 31 provides air passage to the hollow interior of bafile 35. Outer surface 37 of baflie 35 is likewise provided with a peripheral series of airorifices 38. As is shown in Figure 3, the outer circumferential periphery of baffle 35 is disposed in close proximity with, but separated from, the interior surface of atomizing cup 24. Baffle 35 may be secured in place by means of set screw 39.

1 Intermediate conduit member 32 is interiorly tapered at the atomizing cup end thereof and supplies a bearing surface for plug valve 40. Plug valve 40 and inner conduit member 33 are securely affixed to each other and are p'rovided'with a lined valve port 41. Valve port 42, when the valve is open, is aligned with valve port 41.

Accordingly, it is seen that the rotational displacement of inner conduit member 33 with respect to intermediate conduit member 32 will produce selective opening and closing-of the fuel valve within the atomizing cup.

Fuel oil inlet andoutlet connections 43 and 44 are affixed 'tointermediate conduit member 32 as shown. An isolating baflle 45 is ring-shaped and is disposed between intermediate and inner conduit members 32 and 33 in a region between the inlet and outlet, fuel oil connections. Apertures 46 are supplied in the wall of inner conduit member 33in a region rearwardly of isolating bafile 45. Thus, when the valve in the atomizing cup is closed, fuel oil pumped into fuel intake connection 43 will flow in the area between the inner and intermediate conduit mem-. bers to a point interior of the atomizing cup and through return ports 47 and 48 to oil outlet connection 44. When the valve is open in the atomizing cup, then a portion of the fuel oil so pumped into the lines will pass into the spinning atomizing cup. The centrifugal force imparted to the fuel oil introduced into the atomizing cup by ,the cup itself will cause the fuel oil to produce a fuel layer along the inner surface of the atomizing cup, which layer will gradually progress toward the mouth of the atomizing cup as additional fuel oil is introduced therein.

Forced air is introduced by means of a blower into housing 10, which is directed, ultimately, toward the outer surfaeeof the cup and beyond. Accordingly, when the fuel layer reaches the lip or mouth of the atomizing cup,

the fuel oil will be atomized by the air blast at the mouth 4 of the cup so as to insure complete oxidation and combustion of the fuel.

The purpose of the bafli'e 35 and the air supplying means accommodating the same is to inject a plurality of small air streams within the atomizing cup. This air stream plurality serves a number of purposes. In the first place, these air streams tend to keep the atomizing cup cool during normal burner operation so as to prevent crust formation of oil-coke deposits. It is desirous that these baffie air streams be maintained during the cooling period of the burner so as to force residual fuel oil out of the cup and to prevent the aforementioned crust formation.

In the absence of a baffle, it has been found that, notwithstanding the spinning and taper of the atomizing cup, some seepage of fuel oil into the bearings 22 and 23 will take place. However, by virtue of the thickness of flange 21 and the design of bat-He 35 itself, rearward seepage of fuel oil is avoided.

The air streams from batfle 35 also serve to reduce the thickness of the fuel layer progressing toward the mouth of atomizing cup 24, so as to optimize atomization of the fuel .oil upon its reaching the mouth of the bly; Itv will be noted that the inner conduit member 33 is'keyed into the rear assembly 57 so that rotation of shaft58 by linkage 59 will produce the rotation of plug valve and inner conduit member 33 withrespect to intermediate conduit member 32.

Linkage 59 is coupled to control motor 60, the conventional design of which enables the rotational displacement of the output shaft thereof upon suitable energization.

While particular embodiments of the present invention have been shown and described, it will be obvious to those skilled in the ant that changes and modifications may be made without departing from this invention in its broader aspects, and, therefore, the aim in the appended claims is to cover all such changes and modifications as fall within the true spirit and scope of this invention.

I claim: 7

1. Industrial burner apparatus of the rotary, atomizing cup type including, in combination, a motor having an axially rotatable, hollow, output member; an atomizing cup mechanically coupled to said motor output member to rotate therewith; coaxially aligned and radially separated, outer, intermediate, and inner conduit members closed at both ends and coaxially disposed within and through'said motor output member; each of said conduit members having one end portion extending within said atomizing cup and the remaining end portion extending beyond said motor output member in a direction away from said atomizing cup; said outer conduit member be ing mechanically separate from said motor output memher; .said outer conduit member defining a generally enclosed airspace adjacent the outer surface'of said intermediate conduit member, having an air-intake connection in the' region of said remaining end portion, and being i provided with a series of apertures circumferentially dis posed inthe region of said one end portion; a laterally disposed, hollow baffie afiixed to said outer conduit member, near the baseof said cup, in registrywith said circumferentially disposed apertures, and provided with a 1' series of air outlet orifices directed outwardly of said cup;

said intermediate conduit member having a valve port conduit member.

disposed -in saidcrie endwportion andfuel iritalgezand out let connections disposed ion :said remaining end portion; an isolation bafile disposed between said intake "and out- "let connections and between said intermediate and inner conduitmembers; said inner conduit rnemberbeing provided with at least one aperture in the region beyond said ba'flie (farthest removed froin said cup); said one end portion of said inner member being provided with at leastone aperture for rendering flow connection between the area between said intermediate and inner conduit members and the interior r of said inner conduit member; said one end portion ofsaid inner member also being provided with a valve port selectively alignable with said intermediate member valve :port; and said inner conduit member being rotationally displaceable with respect to said intermediate conduit member.

2. Apparatus according to -claiml in which the circumferential periphery of saidlaterally disposed hollow bafiie is in proximity Withbut physically separate from said cup, and in which said outwardly directed bafile orifices are in proximity with said periphery of said bafile. i 3.Industrial burner apparatus of the rotary, atomizing cup type including, in combination, a motor having ahousingand anaxially rotatable, hollow, output member; an extension sleeveaffixed to said motor output member; 'a flange affixed to said extension sleeve; an atomizing cup aflixed to said flangeyan interior sleeve afiixed to said housing and bearinged within said extension sleeve; and a fuelvalve, air injection device comprising: coaxially aligned andradially separated, outer, intermediate, and innerconduit members closed at bothends and coaxially disposed'within and through said interior sleeve; each of said conduit members having one end portion extending within said atomizing cupandthe remaining end portion extending beyond said interior sleeve in a direction away "from said atomizing cup; said outer conduit member defining a generallyenclosed air-space adjacent the outer surface of said intermediate conduit member, having an air-intake connection in theregion of said remaining end portion, and being provided with a series of apertures circumferentially disposed in the region of said one end portion; a laterally disposed,-hollow'baffle aflixed to said outer conduit member, near the base of said cup and in front of said flange, in registry with said circumferentially disposed apertures, and provided with a series of air outlet orifices directed outwardly of said cup; said interbaflle disposed between said intake and outlet connections and between said intermediate and inner conduit members; said inner conduit member being provided with at least one aperture in the region beyond said baffle (farthest removed from said cup); said one end portion of .said inner member being provided with at least one aperture for rendering flow connection' between the area between said intermediate and inner conduit members and the interior of said inner conduit member; said one end portion of said inner member also being provided with a valve port selectively alignable with said intermediate member valve port; and said inner conduit member being rotationally.displaceable with respect to said intermediate "4. Industrial burner apparatus of'the rotary, atomizing cup type including, in combination, a motor having-a housing and an axially rotatable, hollow, output member; an extension sleeve aflixed to said motor output member; a flange affixed to said extension sleeve; an atomizing cup afiixed to said flange; an interior sleeve aflixed to said 'housing'and bearinged within said extension sleeve; and a fuel valve, air injection device comprising? coaxially aligned and radially separated, outer, intermediate, and inner conduit members closed at both ends andrcoaxially *disposedwithin andthrough said interior sleeve; each of "said conduit members having onezend portionextending within said atomizing cup' and the remaining; end portion \extending :beyond said interior sleeve in la idirectioniaway from said atomizing cup; said outertcond'uit member :having a clearance with respect to said interior sleeve.of.the

order of iOOSvinch; means for terminating said zclearance at thetermination of saidsleeve farthestwremoved from saidycup, said-clearancedefining a bearing.lubrieationzfluid passage; lubricating, fluid connection means provided said interiorsleeve; a lubricating oil outlet orificetdisposedtin said interior sleeve intthe region of saidextension :sleeve;

with said circumferentially disposed apertures and -provided with aseries of .air outlet orifices directed outwardly -of\said cup; said intermediatehconduit member havingsa valve port disposediin said one ,end portion and fuel intake anduoutlet tconnectionsdisposed on :said remaining end portion; an isolationlbaflle disposed between said intake and outlet connections and between said intermediate and inner conduitmembers; said inner conduit member being provided with at least one aperture in the region beyond said bafiletfarthestremoved from said cup); said one end portion of said inner member being provided with at least one aperture for rendering flow connection between, the area between said intermediate *and' inner conduit members and the' interior of said inner .conduit member; saidone end portion of saidzinner memberralso being provided with a valve port selectively alignablewith said intermediate member valve port; and said inner con- 'duit member being rotationallydisplaceable with respect to said intermediate conduit member.

5; In industrial burner apparatus of the rotary, atomiz- 'ingcup type includinga motor having a housingiandtan 40 axially rotatable, hollow, output member, an extension sleeve aflixed to said motoroutput member, :a flange afiixejd to said extension sleeve, ran atomizing cup affixedto said flange, an interior sleeve afiixed to said housing and bearringed within said extension sleeve; an improved fuel valve,

air injection device, said device comprisingz coaxially aligned andradially separated, outer, intermediate, and inner conduit members closed at bothends and coaxially disposed within andthrough said interior sleeve; each of said conduit members having one end portion extending within said atomizing cup and the remaining end portion extending beyond said interior sleeveiin a direction away from said atomizing cup; :said outer conduit memberfdefining a generally enclosed air-space adjacent the outer surface of saidmintermediate conduit member, having -an air-intake connection in the region of said remaining end portion, and being provided with a series'of aperturestcircumferentially disposed in the region of saidone end por-, tion; a laterally disposed, hollow baflie affixed tol sai'd outer conduit member, near the base of said cup andin frontof said flange, in registryrwith said circumferentially disposed apertures, and provided with aseries of air outlet orifices directed outwardly of said cup; said intermediate conduit member havinga valve port disposed in: said one end portion and fuel intake and outlet connectionsdisposedonsaid remaining end portion; an isolation bafiie disposed between saidintake and outlet connections and between said intermediate and inner conduit members;

said innerconduit member beingprovided'with at least one aperture in the region beyond said baffle (farthestremovedfrom said cup); saidloneiend portion of said inner member being provided with at least one apertureufor rendering flow connection between the area between said intermediate and inner conduit members andthe interior :of said inner conduit member; said one end portion of said inner mem r lso jbeingiprpvideduwith ;a it valve port respect to said intermediate conduit izing'cup type including a motor having a housing and an axially rotatable, hollow, output member, an extension sleeve afiixed to said motor output member, a flange laflixed to said extension sleeve, an atomizing cup afiixed 'to said flange, .an interior sleeve aflixed to said housing and bearing ed within said extension sleeve; an improved fuel valve, air injection device, said device comprising: coaxially aligned-and radially separated, outer, intermediate, and inner conduit members closed at both ends and coaxially disposed within and through said interior sleeve; each of said conduit members having one end 'portion extending within said atomizing cup and the remaining end portion extending beyond said interior sleeve in a direction away from said atomizing cup; said outer conduit member having a clearance with respect to said interior sleeve of the order of .005 inch; means for terminating said clearance at the termination of said sleeve .farthest removed from said cup, said clearance defining 'a bearing lubrication fluid passage; lubricating fluid connection means provided said interior sleeve; a lubricating 'oil outlet orifice disposed in said interior sleeve in the region of said extension sleeve; said outer conduit member defining a generally enclosed air-space adjacent the outer surface of said intermediate conduit member, having an air-intake connection in the region of said remaining end portion, and being provided with a series of apertures circumferentially disposed in the region of said one end portion; a laterally disposed, hollow bai'fle aflixed to said outer conduit member, near the base of said cup and in front of said flange, in registry with said circumferentially disposed apertures, and provided with a series of air outlet orifices directed outwardly of said 'cup; said intermediate conduit member having a valve port disposed in said one end portion and fuel intake :and outlet connections. disposed on said remaining end vportion; an isolation baffle disposed between said intake and outlet connections and between said intermediate and inner conduit members; said inner conduit member being provided with at least one aperture in the region beyond said baifle (farthest removed from said cup); said one end portion of said inner member being provided with at least one aperture for rendering flow connection between the area between said intermediate and inner conduit members and the interior of said inner conduit member; said one end portion of said inner member also being provided with a valve port selectively .alignable with said intermediate member valve port; and said inner conduit member being rotationally displaceable with respect to said intermediate conduit member.

7. Industrial burner apparatus of the rotary, atomiz-,

ingcup type including, in combination, a motor having an axially rotatable, hollow, output member; an atomizing cup mechanically coupled to said motor output member to rotate therewith; means for directing forced air against the exterior and outwardly of said cup; coaxially aligned and radially separated, outer, intermediate, and inner conduit members closed at both ends and coaxially disposed within and through said motor output .lrnember; each of said conduit members having one end portion extending within said atomizing cup and the remaining end portion extending beyond said motor output member in a direction away from said atomizing cup; said outer conduit member being mechanically separate from said motor output member; said outer conduit member defining a generally enclosed air-space adjacent- -the outer surface of said intermediate conduit member, having an air-intake connection in the region of said remaining end portion, and being provided with a series of aperturescircumferentially disposed in the region of said one'end portion; a laterally disposed, hollow bafilel -aflix'ed tosaid outer .conduit member, near the basejof said cup, in registry with said,circumferentially disposed apertures, and'provided with aseries of air outlet orifices 'directed outwardly ,of said cup;lsa'id intermediate conduit member having a valve port. disposed in said one end portion and fuel in'takeiand outlet connections i-disposed on said remaining end portion; an isolation bafile disposed between saidintake and outlet connections and between said intermediate and inner conduit members;

.said inner conduit member being provided with at least one aperture in the region beyond said bafile (farthest :removedfrom said cup); said one end portion of said inner member being provided with at least one aperture for rendering flow connection between the area between said intermediate and inner conduit members and-the interior of said inner conduit member; said one end portion of said inner member also being provided with a valve port selectively alignable with said intermediate member valve port; and said inner conduit member being rotationally displaceable with respect to said intermediate conduit member.

8. Industrial burner apparatus of the rotary, atomizing cup type including, in combination, a motor having -a housing and an axially rotatable, hollow, output member; an extension sleeve affixed to said motor output member; a flange aifixed to said extension sleeve; an atomizing cup aflixed to said flange; means for directing forced air against the exterior and outwardly of said cup; an interior sleeve affixed to said housing and bearinged within said extension sleeve; and a fuel valve, air injection device comprising: coaxially aligned and radially separated, outer, intermediate, and inner conduit members closed at both ends and coaxially disposed within and through said interior sleeve; each of said conduit members having one end portion extending within said atomizing cup and the remaining end portion extending beyond said interior sleeve in a direction away from said atomizing cup; said outer conduit member defining a generally enclosed air-space adjacent the outer surface of said intermediate conduit member, having an air-intake connection in the region of said remaining end portion, and being provided with a series of apertures circumferentially disposed in the region of said one end portion; a laterally disposed, hollow baffle aflixed to said outer conduit member, near the base of said cup and in front of said flange, in registry with said circumferentially disposed apertures, and provided with a series of air outlet orifices directed outwardly of said cup; said intermediate conduit member having a valve port disposed in said one end portion and fuel intake and outlet connections disposed on said remaining end portion; an isolation baflle disposed between said intake and outlet connections and between said intermediate and inner conduit members; said inner conduit member being provided with at least one aperture in the region beyond said baffle (farthest removed from said cup); said one end portion of said inner member being provided with at least one aperture for rendering flow connection between the area between said intermediate and inner conduit members and the interior of said inner conduit member;

member; each of said conduit members having one end portion extending within said atomizing cup and the :remaining end portion extending yond Said motor Output member in a direction away from said atomizing cup; said outer conduit member being mechanically separate from said motor output member; said outer conduit member defining a generally enclosed air-space adjacent the outer surface of said intermediate conduit member, having an air-intake connection in the region of said remaining end portion, and being provided with a series of apertures circumferentially disposed in the region of said one end portion; a laterally disposed, hollow baflie aflixed to said outer conduit member, near the base of said cup, in registry with said circumferentially disposed apertures, and provided with a series of air outlet orifices directed outwardly of said cup; said intermediate conduit member having a valve port disposed in said one end portion and fuel intake and outlet connections disposed on said remaining end portion; said one end portion of said intermediate conduit member having an interior taper in the region of said valve port; an isolation baffie disposed between said intake and outlet connections and between said intermediate and inner conduit members; said inner conduit member being provided with at least one aperture in the region beyond said baflle (farthest removed from said cup); said one end portion of said inner member being provided with at least one aperture for rendering flow connection between the area between said intermediate and inner conduit members and the interior of said inner conduit member; said one end portion of said inner member also being provided with a valve port selectively alignable with said intermediate member valve port; a plug valve disposed over said one end of said inner conduit member, having a valve aperture aligned with said valve port of said inner con- 'duit member, and having a tapered exterior cooperating with said interior taper of said intermediate conduit member; and said inner conduit member being rotationally displaceable with respect to said intermediate conduit member.

References Cited in the file of this patent UNITED STATES PATENTS

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