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Indent Level
Color Curly Brackets (indicating CPC extensions to IPC) References Date Revised
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CPC
COOPERATIVE PATENT CLASSIFICATION
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FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS [2013‑01]
NOTE

  • Attention is drawn to the references and notes following the title of class F27 and the note (par. III) following the Contents of Section H.
WARNING

  • The following IPC groups are not used in the CPC system. Subject matter covered by these groups is classified in the following CPC groups:
    F27B1/09 covered by F27B 1/08
    F27B5/05 " " F27B 5/04
    F27B14/16, F27B14/18 " " F27B 14/0806
    F27B21/08 to F27B21/14 " " F27D
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Shaft or like vertical or substantially vertical furnaces (for preheating, burning, calcining or cooling lime, magnesia or dolomite C04B 2/12) [2013‑01]
F27B 1/005
.
{
wherein no smelting of the charge occurs, e.g. calcining or sintering furnaces
}
[2013‑01]
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F27B 1/02
.
with two or more shafts or chambers, e.g. multi-storey [2013‑01]
F27B 1/025
. .
{
with fore-hearth
}
[2013‑01]
F27B 1/04
. .
Combinations or arrangements of shafts [2013‑01]
F27B 1/06
.
of other than up-draught type [2013‑01]
F27B 1/08
.
heated otherwise than by solid fuel mixed with charge [2013‑01]
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F27B 1/10
.
Details, accessories, or equipment peculiar to furnaces of these types [2013‑01]
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F27B 1/12
. .
Shells or casings; Supports therefor [2013‑01]
F27B 1/14
. . .
Arrangements of linings (linings in general F27D 1/00) [2013‑01]
F27B 1/16
. .
Arrangements of tuyeres [2013‑01]
F27B 1/18
. .
Arrangements of dust collectors [2013‑01]
F27B 1/20
. .
Arrangements of devices for charging [2013‑01]
F27B 1/21
. .
Arrangements of devices for discharging [2013‑01]
F27B 1/22
. .
Arrangements of heat-exchange apparatus (heat-exchangers in general F28C, F28D) [2013‑01]
F27B 1/24
. .
Cooling arrangements [2013‑01]
F27B 1/26
. .
Arrangements of controlling devices [2013‑01]
F27B 1/28
. .
Arrangements of monitoring devices, of indicators, of alarm devices [2013‑01]
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Hearth-type furnaces, e.g. of reverberatory type (F27B 9/00, F27B 11/00, F27B 13/00, F27B 14/00, F27B 15/00, F27B 21/00 take precedence); Tank furnaces [2013‑01]
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F27B 3/002
.
{
Siemens-Martin type furnaces
}
[2013‑01]
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F27B 3/005
. .
{
Port construction
}
[2013‑01]
F27B 3/007
. . .
{
Removable burner head
}
[2013‑01]
F27B 3/02
.
of single-chamber fixed-hearth type [2013‑01]
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.
of multiple-hearth type; of multiple-chamber type; Combinations of hearth-type furnaces [2013‑01]
F27B 3/045
. .
{
Multiple chambers, e.g. one of which is used for charging
}
[2013‑01]
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F27B 3/06
.
with movable working chambers or hearths, e.g. tiltable,
{
oscillating or describing a composed movement
}
[2013‑01]
F27B 3/065
. .
{
tiltable
}
[2013‑01]
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.
heated electrically, with or without any other source of heat [2013‑01]
F27B 3/085
. .
{
Arc furnaces
}
[2013‑01]
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F27B 3/10
.
Details, accessories, or equipment peculiar to hearth-type furnaces [2013‑01]
F27B 3/105
. .
{
Slag chamber
}
[2013‑01]
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F27B 3/12
. .
Working chambers or casings; Supports therefor [2013‑01]
F27B 2003/125
. . .
{
Hearths
}
[2013‑01]
F27B 3/14
. . .
Arrangements of linings [2013‑01]
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. . .
Walls; Roofs [2013‑01]
F27B 2003/165
. . . .
{
Roofs
}
[2013‑01]
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. .
Arrangements of devices for charging [2013‑01]
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F27B 3/183
. . .
{
Charging of arc furnaces vertically through the roof, e.g. in three points
}
[2013‑01]
F27B 3/186
. . . .
{
Charging in a vertical chamber adjacent to the melting chamber
}
[2013‑01]
F27B 3/19
. .
Arrangements of devices for discharging [2013‑01]
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. .
Arrangements of heating devices [2013‑01]
F27B 3/205
. . .
{
Burners
}
[2013‑01]
Collapse
. .
Arrangements of air or gas supply devices [2013‑01]
F27B 3/225
. . .
{
Oxygen blowing
}
[2013‑01]
F27B 3/24
. .
Cooling arrangements [2013‑01]
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. .
Arrangements of heat-exchange apparatus [2013‑01]
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F27B 3/263
. . .
{
Regenerators
}
[2013‑01]
F27B 3/266
. . . .
{
Exhaust gases reversing flow devices
}
[2013‑01]
F27B 3/28
. .
Arrangement of controlling, monitoring, alarm or the like devices [2013‑01]
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Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated (F27B 9/00 takes precedence) [2013‑01]
F27B 5/02
.
of multiple-chamber type [2013‑01]
F27B 5/04
.
adapted for treating the charge in vacuum or special atmosphere [2013‑01]
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F27B 5/06
.
Details, accessories, or equipment peculiar to furnaces of these types [2013‑01]
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F27B 2005/062
. .
{
Cooling elements
}
[2013‑01]
F27B 2005/064
. . .
{
disposed in the furnace, around the chamber, e.g. coils
}
[2013‑01]
F27B 2005/066
. . .
{
disposed around the fan
}
[2013‑01]
F27B 2005/068
. . .
{
for external cooling
}
[2013‑01]
F27B 5/08
. .
Arrangements of linings [2013‑01]
F27B 5/10
. .
Muffles [2013‑01]
F27B 5/12
. .
Arrangement of devices for charging [2013‑01]
F27B 5/13
. .
Arrangement of devices for discharging [2013‑01]
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. .
Arrangements of heating devices [2013‑01]
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F27B 2005/143
. . .
{
Heating rods disposed in the chamber
}
[2013‑01]
F27B 2005/146
. . . .
{
the heating rods being in the tubes which conduct the heating gases
}
[2013‑01]
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. .
Arrangements of air or gas supply devices [2013‑01]
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F27B 2005/161
. . .
{
Gas inflow or outflow
}
[2013‑01]
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F27B 2005/162
. . . .
{
through closable or non-closable openings of the chamber walls
}
[2013‑01]
F27B 2005/163
. . . . .
{
Controlled openings, e.g. orientable
}
[2013‑01]
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F27B 2005/164
. . . .
{
Air supply through a set of tubes with openings
}
[2013‑01]
F27B 2005/165
. . . . .
{
Controlled tubes, e.g. orientable or with closable openings
}
[2013‑01]
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F27B 2005/166
. . .
{
Means to circulate the atmosphere
}
[2013‑01]
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F27B 2005/167
. . . .
{
the atmosphere being recirculated through the treatment chamber by a turbine
}
[2013‑01]
F27B 2005/168
. . . . .
{
by more than one turbine
}
[2013‑01]
F27B 2005/169
. . . .
{
the atmosphere being continuously renewed by exterior means
}
[2013‑01]
F27B 5/18
. .
Arrangement of controlling, monitoring, alarm or like devices [2013‑01]
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Rotary-drum furnaces, i.e. horizontal or slightly inclined [2013‑01]
F27B 2007/005
.
{
for the treatment of slurries or wet materials
}
[2013‑01]
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F27B 7/02
.
of multiple-chamber or multiple-drum type [2013‑01]
F27B 2007/022
. .
{
the drum having a non-uniform section along its length
}
[2013‑01]
F27B 2007/025
. .
{
with different chambers, e.g. treatment zones
}
[2013‑01]
F27B 2007/027
. .
{
with more than one drum
}
[2013‑01]
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F27B 7/04
. .
with longitudinal divisions [2013‑01]
F27B 2007/041
. . .
{
Longitudinal tubes
}
[2013‑01]
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F27B 2007/043
. . .
{
the partition being a cylinder, coaxial to the rotary drum, defining two chambers
}
[2013‑01]
F27B 2007/045
. . . .
{
the charge going in one direction in one chamber, then after a turn coming back in the other direction in the other chamber
}
[2013‑01]
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F27B 2007/046
. . .
{
Radial partitions
}
[2013‑01]
F27B 2007/048
. . . .
{
defining an helical chamber
}
[2013‑01]
F27B 7/06
.
adapted for treating the charge in vacuum or special atmosphere [2013‑01]
F27B 7/08
.
externally heated [2013‑01]
F27B 7/10
.
internally heated, e.g. by means of passages in the wall [2013‑01]
F27B 7/12
.
tiltable [2013‑01]
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F27B 7/14
.
with means for agitating or moving the charge [2013‑01]
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F27B 7/16
. .
the means being fixed relatively to the drum,
{
e.g. composite means
}
(F27B 7/04 takes precedence) [2013‑01]
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F27B 7/161
. . .
{
the means comprising projections jutting out from the wall
}
[2013‑01]
Collapse
F27B 7/162
. . . .
{
the projections consisting of separate lifting elements, e.g. lifting shovels
}
[2013‑01]
F27B 2007/163
. . . . .
{
using only a ring of lifting elements to lift the charge
}
[2013‑01]
F27B 2007/165
. . . .
{
forming a helical lifting projection
}
[2013‑01]
F27B 7/166
. . .
{
the means comprising chains
}
[2013‑01]
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F27B 7/167
. . .
{
the means comprising partitions
}
[2013‑01]
F27B 2007/168
. . . .
{
Annular partition
}
[2013‑01]
F27B 7/18
. .
the means being movable within the drum [2013‑01]
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.
Details, accessories, or equipment peculiar to rotary-drum furnaces [2013‑01]
F27B 2007/2008
. .
{
Devices for reintroducing dust in the drum
}
[2013‑01]
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F27B 7/2016
. .
{
Arrangements of preheating devices for the charge
}
[2013‑01]
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F27B 7/2025
. . .
{
consisting of a single string of cyclones
}
[2013‑01]
F27B 7/2033
. . . .
{
with means for precalcining the raw material
}
[2013‑01]
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F27B 7/2041
. . .
{
consisting of at least two strings of cyclones with two different admissions of raw material
}
[2013‑01]
F27B 7/205
. . . .
{
with precalcining means on the string supplied with exhaust gases from the cooler
}
[2013‑01]
F27B 7/2058
. . . .
{
with precalcining means on each string
}
[2013‑01]
F27B 7/2066
. . .
{
comprising a band transporter
}
[2013‑01]
F27B 7/2075
. .
{
Removing incrustations
}
[2013‑01]
F27B 7/2083
. .
{
Arrangements for the melting of metals or the treatment of molten metals
}
[2013‑01]
F27B 2007/2091
. .
{
Means for eliminating compounds from gases by condensation, e.g. alkali metals
}
[2013‑01]
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F27B 7/22
. .
Rotary drums; Supports therefor [2013‑01]
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F27B 7/2206
. . .
{
Bearing rings
}
[2013‑01]
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F27B 2007/2213
. . . .
{
mounted floatingly on the drum
}
[2013‑01]
F27B 2007/222
. . . . .
{
the mounting comprising radially resilient elements, e.g. springs
}
[2013‑01]
F27B 2007/2226
. . . . .
{
the mounting comprising elements to maintain the ring between series of abutments
}
[2013‑01]
F27B 2007/2233
. . . .
{
the ring being fixed to the drum, e.g. welded
}
[2013‑01]
F27B 7/224
. . .
{
Discharge ends
}
[2013‑01]
Collapse
F27B 2007/2246
. . .
{
Support rollers
}
[2013‑01]
Collapse
F27B 2007/2253
. . . .
{
mounted movable, e.g. resiliently on the ground
}
[2013‑01]
F27B 2007/226
. . . . .
{
constituted of series of two rollers mounted on tiltable support along the drum
}
[2013‑01]
F27B 2007/2266
. . . . .
{
the mounting allowing a movement of the rollers support in a horizontal plane
}
[2013‑01]
F27B 2007/2273
. . . .
{
with arrangements, e.g. rollers, to maintain the drum against longitudinal movement
}
[2013‑01]
F27B 2007/228
. . . .
{
comprising rollable bodies
}
[2013‑01]
F27B 2007/2286
. . . .
{
supporting the drum directly, without the use of a bearing ring
}
[2013‑01]
F27B 2007/2293
. . .
{
the furnace being suspended
}
[2013‑01]
F27B 7/24
. . .
Seals between rotary and stationary parts [2013‑01]
Collapse
F27B 7/26
. .
Drives [2013‑01]
Collapse
F27B 2007/261
. . .
{
working with a ring embracing the drum
}
[2013‑01]
F27B 2007/262
. . . .
{
A gear ring combined with a dented wheel drive
}
[2013‑01]
F27B 2007/263
. . . .
{
A gear ring combined with a ram drive
}
[2013‑01]
F27B 2007/265
. . . .
{
the ring being mounted floatingly
}
[2013‑01]
F27B 2007/266
. . . .
{
the ring being a bearing ring
}
[2013‑01]
F27B 2007/267
. . . .
{
A gear ring combined with a chain drive
}
[2013‑01]
F27B 2007/268
. . .
{
Details of the motor or the pinions
}
[2013‑01]
F27B 7/28
. .
Arrangements of linings [2013‑01]
F27B 7/30
. .
Arrangements of partitions [2013‑01]
Collapse
. .
Arrangement of devices for charging [2013‑01]
Collapse
F27B 7/3205
. . .
{
Charging
}
[2013‑01]
Collapse
F27B 2007/3211
. . . .
{
at the open end of the drum
}
[2013‑01]
Collapse
F27B 2007/3217
. . . . .
{
axially, optionally at some distance in the kiln
}
[2013‑01]
F27B 2007/3223
. . . . . .
{
the charging device being movable axially, e.g. reciprocable
}
[2013‑01]
F27B 2007/3229
. . . . . .
{
via a centrifugal device
}
[2013‑01]
F27B 2007/3235
. . . . . .
{
the introducing device comprising a spray or a lance
}
[2013‑01]
F27B 2007/3241
. . . . . .
{
in the flame of the burner
}
[2013‑01]
Collapse
F27B 2007/3247
. . . .
{
through a lateral opening in the drum
}
[2013‑01]
F27B 2007/3252
. . . . .
{
with lifting scoops attached to the drum
}
[2013‑01]
Collapse
F27B 2007/3258
. . . .
{
at the open end of the drum
}
[2013‑01]
F27B 2007/3264
. . . . .
{
using special discharge means located around the discharge end, e.g. lifting scoops or a transversal annular partition
}
[2013‑01]
F27B 2007/327
. . . .
{
centrifugally through lateral openings in the drum
}
[2013‑01]
F27B 2007/3276
. . . .
{
with a collector means extending longitudinally into the drum
}
[2013‑01]
Collapse
F27B 2007/3282
. . .
{
Details
}
[2013‑01]
F27B 2007/3288
. . . .
{
Sieves or grading means
}
[2013‑01]
F27B 2007/3294
. . . .
{
Means to fluidise the charge in the air
}
[2013‑01]
F27B 7/33
. .
Arrangement of devices for discharging [2013‑01]
F27B 7/34
. .
Arrangements of heating devices [2013‑01]
Collapse
F27B 7/36
. .
Arrangements of air or gas supply devices [2013‑01]
Collapse
F27B 7/362
. . .
{
Introducing gas into the drum axially or through the wall
}
[2013‑01]
F27B 2007/365
. . . .
{
longitudinally
}
[2013‑01]
F27B 2007/367
. . . .
{
transversally through the wall of the drum
}
[2013‑01]
Collapse
. .
Arrangements of cooling devices [2013‑01]
Collapse
F27B 7/383
. . .
{
Cooling devices for the charge
}
[2013‑01]
F27B 7/386
. . . .
{
Rotary-drum cooler
}
[2013‑01]
F27B 7/40
. . .
Planetary coolers [2013‑01]
F27B 7/42
. .
Arrangement of controlling, monitoring, alarm or like devices [2013‑01]
Collapse
Furnaces through which the charge is moved mechanically, e.g. of tunnel type (F27B 7/14 takes precedence); Similar furnaces in which the charge moves by gravity [2013‑01]
Collapse
F27B 9/02
.
of multiple-track type; of multiple-chamber type; Combinations of furnaces [2013‑01]
Collapse
F27B 9/021
. .
{
having two or more parallel tracks
}
[2013‑01]
Collapse
F27B 9/022
. . .
{
With two tracks moving in opposite directions
}
[2013‑01]
Collapse
F27B 9/023
. . . .
{
with a U turn at one end
}
[2013‑01]
F27B 9/024
. . . . .
{
with superimposed tracks
}
[2013‑01]
F27B 9/025
. . .
{
having two or more superimposed tracks (F27B 9/024 takes precedence)
}
[2013‑01]
Collapse
F27B 2009/026
. .
{
Two or more conveyers, e.g. mounted successively
}
[2013‑01]
F27B 2009/027
. . .
{
working in parallel
}
[2013‑01]
F27B 9/028
. .
{
Multi-chamber type furnaces, (F27B 9/029 takes precedence)
}
[2013‑01]
F27B 9/029
. .
{
Multicellular type furnaces constructed with add-on modules
}
[2013‑01]
Collapse
.
adapted for treating the charge in vacuum or special atmosphere [2013‑01]
F27B 9/042
. .
{
Vacuum furnaces
}
[2013‑01]
Collapse
F27B 9/045
. .
{
Furnaces with controlled atmosphere
}
[2013‑01]
F27B 9/047
. . .
{
the atmosphere consisting of protective gases
}
[2013‑01]
Collapse
.
heated without contact between combustion gases and charge; electrically heated [2013‑01]
F27B 9/061
. .
{
with at least two longitudinal chambers carrying combustion gases, i.e of the Dressler type
}
[2013‑01]
Collapse
F27B 9/062
. .
{
electrically heated
}
[2013‑01]
Collapse
F27B 9/063
. . .
{
Resistor heating, e.g. with resistors also emitting IR rays
}
[2013‑01]
F27B 9/065
. . . .
{
the resistance being transported by the conveyer
}
[2013‑01]
F27B 9/066
. . .
{
heated by lamps
}
[2013‑01]
F27B 9/067
. . .
{
heated by induction
}
[2013‑01]
F27B 9/068
. .
{
heated by radiant tubes, the tube being heated by a hot medium, e.g. hot gases
}
[2013‑01]
Collapse
F27B 9/08
. .
heated through chamber walls [2013‑01]
Collapse
F27B 9/082
. . .
{
Muffle furnaces
}
[2013‑01]
F27B 9/084
. . . .
{
the muffle being fixed and in a single piece
}
[2013‑01]
F27B 9/086
. . . .
{
with two or more fixed muffles
}
[2013‑01]
F27B 9/088
. . . .
{
Series of separate muffles conveyed through the furnace
}
[2013‑01]
F27B 9/10
. .
heated by hot air or gas [2013‑01]
Collapse
F27B 9/12
.
with special arrangements for preheating or cooling the charge [2013‑01]
F27B 2009/122
. .
{
Preheating
}
[2013‑01]
Collapse
F27B 2009/124
. .
{
Cooling
}
[2013‑01]
Collapse
F27B 2009/126
. . .
{
involving the circulation of cooling gases, e.g. air
}
[2013‑01]
F27B 2009/128
. . . .
{
the gases being further utilised as oxidants in the burners
}
[2013‑01]
Collapse
.
characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment (F27B 9/28 takes precedence; travelling or movable supports or containers for the charge F27D 3/12) [2013‑01]
F27B 9/142
. .
{
the charge moving along a vertical axis
}
[2013‑01]
F27B 9/145
. .
{
the charge moving along a serpentine path
}
[2013‑01]
F27B 9/147
. .
{
the charge moving on an inclined floor
}
[2013‑01]
Collapse
F27B 9/16
. .
the charge moving in a circular or arcuate path [2013‑01]
Collapse
F27B 9/18
. . .
under the action of scrapers or pushers [2013‑01]
F27B 9/185
. . . .
{
multiple hearth type furnaces
}
[2013‑01]
Collapse
F27B 9/20
. .
the charge moving in a substantially straight path
{
tunnel furnace
}
[2013‑01]
Collapse
F27B 9/201
. . .
{
walking beam furnace
}
[2013‑01]
Collapse
F27B 9/202
. . . .
{
Conveyer mechanisms therefor
}
[2013‑01]
F27B 9/203
. . . . .
{
having ramps (F27B 9/206 takes precedence)
}
[2013‑01]
F27B 9/205
. . . . .
{
having excentrics or lever arms (F27B 9/206 takes precedence)
}
[2013‑01]
F27B 9/206
. . . . .
{
consisting of a single central beam
}
[2013‑01]
F27B 9/207
. . . . .
{
consisting of two or more conveyers
}
[2013‑01]
F27B 9/208
. . . .
{
the workpieces being rotated during their advance
}
[2013‑01]
Collapse
F27B 9/22
. . .
{
on rails, e.g.
}
under the action of scrapers or pushers (F27B 9/26 takes precedence) [2013‑01]
F27B 9/222
. . . .
{
the path comprising a section specially adapted for effecting equalisation of the temperature of the charge
}
[2013‑01]
F27B 9/225
. . . .
{
the charge being subjected to an additional manipulation along the path
}
[2013‑01]
F27B 9/227
. . . .
{
with rotation of the charge (F27B 9/147 takes precedence)
}
[2013‑01]
Collapse
. . .
being carried by a conveyer
{
(transport by conveyers in general B65G)
}
[2013‑01]
Collapse
F27B 9/2407
. . . .
{
the conveyer being constituted by rollers (roller hearth furnace)
}
[2013‑01]
F27B 9/2415
. . . . .
{
the charge rotating about an axis transversal to the axis of advancement of the charge
}
[2013‑01]
F27B 9/2423
. . . . .
{
the charge rotating about an axis parallel to the axis of advancement of the charge
}
[2013‑01]
Collapse
F27B 9/243
. . . .
{
Endless-strand conveyer
}
[2013‑01]
F27B 2009/2438
. . . . .
{
with means to transfer the heat from the outcoming band to the incoming band
}
[2013‑01]
F27B 2009/2446
. . . . .
{
with means to control the tension of the band
}
[2013‑01]
F27B 9/2453
. . . .
{
Vibrating conveyer (shaker hearth furnace)
}
[2013‑01]
F27B 9/2461
. . . .
{
the charge being suspended from the conveyer
}
[2013‑01]
F27B 9/2469
. . . .
{
the conveyer being constituted by rollable bodies
}
[2013‑01]
F27B 9/2476
. . . .
{
the conveyer being constituted by air cushion
}
[2013‑01]
F27B 2009/2484
. . . .
{
the conveyer being a helical device
}
[2013‑01]
F27B 2009/2492
. . . .
{
the conveyer being constituted by series of little rams or ratchets, moving the charge along
}
[2013‑01]
Collapse
. . .
on or in trucks, sleds, or containers [2013‑01]
Collapse
F27B 9/262
. . . .
{
on or in trucks
}
[2013‑01]
F27B 2009/264
. . . . .
{
the truck carrying a partition
}
[2013‑01]
Collapse
F27B 2009/266
. . . . .
{
the truck having conducts for guiding the oven atmosphere
}
[2013‑01]
F27B 2009/268
. . . . . .
{
through the structure of the car and through the charge
}
[2013‑01]
F27B 9/28
.
for treating continuous lengths of work [2013‑01]
Collapse
F27B 9/30
.
Details, accessories, or equipment peculiar to furnaces of these types [2013‑01]
Collapse
F27B 9/3005
. .
{
arrangements for circulating gases
}
[2013‑01]
Collapse
F27B 9/3011
. . .
{
arrangements for circulating gases transversally
}
[2013‑01]
F27B 2009/3016
. . . .
{
with arrangements to circulate gases through the charge
}
[2013‑01]
F27B 2009/3022
. . . .
{
with arrangements to maintain oxidising reducing or neutral zones
}
[2013‑01]
F27B 2009/3027
. . .
{
Use of registers, partitions
}
[2013‑01]
F27B 2009/3033
. . .
{
Fumes circulating in the same direction as the charge
}
[2013‑01]
F27B 2009/3038
. . .
{
Fumes or gases alternatively changing their longitudinal direction
}
[2013‑01]
F27B 9/3044
. .
{
Furnace regenerators
}
[2013‑01]
Collapse
F27B 2009/305
. .
{
Particular conformation of the furnace
}
[2013‑01]
F27B 2009/3055
. . .
{
Non-uniform section through the length of the furnace
}
[2013‑01]
F27B 2009/3061
. . .
{
Furnaces with longitudinal grooves
}
[2013‑01]
F27B 2009/3066
. .
{
Cooling the under-structure of the kiln, e.g. under the cars
}
[2013‑01]
F27B 2009/3072
. .
{
Balancing the pressure between the upper part and the lower part of the kiln, above and under the track
}
[2013‑01]
F27B 9/3077
. .
{
Arrangements for treating electronic components, e.g. semiconductors
}
[2013‑01]
F27B 2009/3083
. .
{
Arrangements to handle skid marks
}
[2013‑01]
F27B 2009/3088
. .
{
Drying arrangements
}
[2013‑01]
F27B 2009/3094
. .
{
Means to store a part of the charge in the furnace
}
[2013‑01]
Collapse
F27B 9/32
. .
Casings [2013‑01]
F27B 9/34
. . .
Arrangements of linings [2013‑01]
Collapse
. .
Arrangements of heating devices [2013‑01]
Collapse
F27B 2009/3607
. . .
{
Heaters located above the track of the charge
}
[2013‑01]
F27B 2009/3615
. . . .
{
Burner in the ceiling directed vertically downwards
}
[2013‑01]
Collapse
F27B 2009/3623
. . .
{
Heaters located under the track
}
[2013‑01]
F27B 2009/363
. . . .
{
Burners in the hearth directed towards the ceiling
}
[2013‑01]
F27B 2009/3638
. . .
{
Heaters located above and under the track
}
[2013‑01]
F27B 2009/3646
. . .
{
Heating the ceiling or the walls for a reverberatory effect
}
[2013‑01]
Collapse
F27B 2009/3653
. . .
{
Preheated fuel
}
[2013‑01]
F27B 2009/3661
. . . .
{
preheated with the exhaust gases
}
[2013‑01]
F27B 2009/3669
. . . .
{
preheated with the gases of the cooling zone
}
[2013‑01]
F27B 2009/3676
. . . .
{
preheated with the gases of the preheating zone
}
[2013‑01]
F27B 2009/3684
. . .
{
Combustion within a combustion chamber with outlets in the kiln chamber
}
[2013‑01]
F27B 2009/3692
. . .
{
The charge containing combustible materials
}
[2013‑01]
Collapse
. .
Arrangements of devices for charging [2013‑01]
F27B 2009/382
. . .
{
Charging
}
[2013‑01]
F27B 2009/384
. . .
{
Discharging
}
[2013‑01]
Collapse
F27B 2009/386
. . .
{
Lateral intake or outtake
}
[2013‑01]
F27B 2009/388
. . . .
{
Centrally in the lateral wall
}
[2013‑01]
F27B 9/39
. .
Arrangements of devices for discharging [2013‑01]
F27B 9/40
. .
Arrangements of controlling or monitoring devices [2013‑01]
F27B 11/00
Bell-type furnaces (for treating metal strips or wire C21D 9/663) [2013‑01]
Collapse
F27B 13/00
Furnaces with both stationary charge and progression of heating, e.g. of ring type, of type in which segmental kiln moves over tionary charge [2013‑01]
F27B 13/02
.
of multiple-chamber type with permanent partitions; Combinations of furnaces [2013‑01]
F27B 13/04
.
of single-chamber type with temporary partitions [2013‑01]
Collapse
F27B 13/06
.
Details, accessories, or equipment peculiar to furnaces of this type [2013‑01]
Collapse
F27B 13/08
. .
Casings [2013‑01]
F27B 13/10
. . .
Arrangements of linings [2013‑01]
F27B 13/12
. .
Arrangements of heating devices [2013‑01]
F27B 13/14
. .
Arrangement of controlling, monitoring, alarm or like devices [2013‑01]
Collapse
Crucible or pot furnace [2013‑01]
Collapse
F27B 2014/002
.
{
Smelting process, e.g. sequences to melt a specific material
}
[2013‑01]
F27B 2014/004
. .
{
Process involving a smelting step, e.g. vaporisation
}
[2013‑01]
F27B 2014/006
. .
{
involving a salt bath or help metal bath
}
[2013‑01]
F27B 2014/008
.
{
Continuous casting
}
[2013‑01]
F27B 14/02
.
with tilting or rocking arrangements (F27B 14/04 takes precedence) [2013‑01]
Collapse
.
adapted for treating the charge in vacuum or special atmosphere [2013‑01]
F27B 2014/045
. .
{
Vacuum
}
[2013‑01]
Collapse
.
heated electrically, e.g. induction crucible furnaces with or without any other source of heat (F27B 14/04 takes precedence) [2013‑01]
Collapse
F27B 14/061
. .
{
Induction furnaces
}
[2013‑01]
F27B 14/063
. . .
{
Skull melting type
}
[2013‑01]
F27B 14/065
. . .
{
Channel type
}
[2013‑01]
F27B 2014/066
. . .
{
Construction of the induction furnace
}
[2013‑01]
F27B 2014/068
. .
{
with the use of an electrode producing a current in the melt
}
[2013‑01]
Collapse
F27B 14/08
.
Details peculiar to crucible or pot furnaces [2013‑01]
Collapse
F27B 14/0806
. .
{
Charging or discharging devices
}
[2013‑01]
F27B 2014/0812
. . .
{
Continuously charging
}
[2013‑01]
F27B 2014/0818
. . .
{
Discharging
}
[2013‑01]
Collapse
F27B 2014/0825
. .
{
Crucible or pot support
}
[2013‑01]
F27B 2014/0831
. . .
{
Support or means for the transport of crucibles
}
[2013‑01]
F27B 2014/0837
. .
{
Cooling arrangements
}
[2013‑01]
F27B 2014/0843
. .
{
Lining or casing
}
[2013‑01]
Collapse
F27B 2014/085
. .
{
Preheating of the charge
}
[2013‑01]
F27B 2014/0856
. . .
{
Preheating of the crucible
}
[2013‑01]
F27B 2014/0862
. .
{
Flux guides
}
[2013‑01]
F27B 2014/0868
. .
{
Magnetic shields
}
[2013‑01]
F27B 2014/0875
. .
{
Two zones or chambers, e.g. one used for charging
}
[2013‑01]
F27B 2014/0881
. .
{
Two or more crucibles
}
[2013‑01]
F27B 2014/0887
. .
{
Movement of the melt
}
[2013‑01]
F27B 2014/0893
. .
{
Heat-conductive material disposed on the surface of the melt
}
[2013‑01]
Collapse
. .
Crucibles [2013‑01]
F27B 2014/102
. . .
{
Form of the crucibles
}
[2013‑01]
F27B 2014/104
. . .
{
Crucible linings
}
[2013‑01]
F27B 2014/106
. . .
{
Ladles
}
[2013‑01]
F27B 2014/108
. . .
{
Cold crucibles (transparent to electromagnetic radiations)
}
[2013‑01]
F27B 14/12
. . .
Covers therefor [2013‑01]
Collapse
. .
Arrangements of heating devices [2013‑01]
F27B 14/143
. . .
{
Heating of the crucible by convection of combustion gases
}
[2013‑01]
F27B 2014/146
. . .
{
Recuperation of lost heat, e.g. regenerators
}
[2013‑01]
F27B 14/20
. .
Arrangement of controlling, monitoring, alarm or like devices [2013‑01]
Collapse
Fluidised-bed furnaces; Other furnaces using or treating finely-divided materials in dispersion
{
(apparatus in general for carrying out chemical or physical processes in a fluidised bed reactor B01J 8/24 to B01J 8/44)
}
[2013‑01]
F27B 15/003
.
{
Cyclones or chain of cyclones
}
[2013‑01]
F27B 15/006
.
{
Equipment for treating dispersed material falling under gravity with ascending gases
}
[2013‑01]
Collapse
F27B 15/02
.
Details, accessories, or equipment peculiar to furnaces of these types [2013‑01]
Collapse
F27B 15/04
. .
Casings; Supports therefor [2013‑01]
F27B 15/06
. . .
Arrangements of linings [2013‑01]
F27B 15/08
. .
Arrangements of devices for charging [2013‑01]
F27B 15/09
. .
Arrangements of devices for discharging [2013‑01]
F27B 15/10
. .
Arrangements of air or gas supply devices [2013‑01]
F27B 15/12
. .
Arrangements of dust collectors [2013‑01]
F27B 15/14
. .
Arrangements of heating devices [2013‑01]
F27B 15/16
. .
Arrangements of cooling devices [2013‑01]
F27B 15/18
. .
Arrangements of controlling devices [2013‑01]
F27B 15/20
. .
Arrangements of monitoring devices, of indicators, of alarm devices [2013‑01]
Collapse
Furnaces of a kind not covered by any preceding group (structural combinations of furnaces F27B 19/02) [2013‑01]
F27B 17/0008
.
{
Open field furnace for burning bricks
}
[2013‑01]
Collapse
F27B 17/0016
.
{
Chamber type furnaces
}
[2013‑01]
F27B 17/0025
. .
{
Especially adapted for treating semiconductor wafers
}
[2013‑01]
F27B 17/0033
. .
{
the floor of the furnaces consisting of the support carrying the charge, e.g. car type furnaces
}
[2013‑01]
Collapse
F27B 17/0041
. .
{
specially adapted for burning bricks or pottery (F27B 17/0033 takes precedence)
}
[2013‑01]
Collapse
F27B 17/005
. . .
{
with cylindrical chambers
}
[2013‑01]
F27B 17/0058
. . . .
{
with superposed cylindrical chambers
}
[2013‑01]
F27B 17/0066
. . .
{
arrangement of the charge, e.g. bricks
}
[2013‑01]
F27B 17/0075
. . .
{
Heating devices therefor
}
[2013‑01]
F27B 17/0083
. .
{
with means for circulating the atmosphere
}
[2013‑01]
F27B 2017/0091
. .
{
Series of chambers, e.g. associated in their use
}
[2013‑01]
Collapse
.
specially designed for laboratory use [2013‑01]
F27B 17/025
. .
{
for dental workpieces
}
[2013‑01]
Collapse
F27B 19/00
Combinations of furnaces of kinds not covered by a single preceding main group [2013‑01]
F27B 19/02
.
combined in one structure [2013‑01]
F27B 19/04
.
arranged for associated working [2013‑01]
Collapse
F27B 21/00
Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction [2013‑01]
F27B 21/02
.
Sintering grates or tables [2013‑01]
F27B 21/04
.
Sintering pots or sintering pans [2013‑01]
F27B 21/06
.
Endless-strand sintering machines [2013‑01]
This page is owned by Office of Patent Classification.
Last Modified: 10/10/2013