IPC 6 English version F27B !A-F27B 21/14

F27-F27B02114

SECTION F– MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

F 27

FURNACES; KILNS; OVENS; RETORTS (specially adapted for a purpose covered by a single other class and specifically mentioned in that class, see the class in question, e.g. bakery ovens A 21 B, glass melting furnaces C 03 B, coke or gas-making apparatus C 10 B, C 10 J, apparatus for cracking hydrocarbons C 10 G, blast furnaces C 21 B, converters for making steel C 21 C, furnaces for heat treatment of metal C 21 D; furnaces for electroslag or arc remelting of metals C 22 B 9/00; enamelling ovens C 23 D; combustion apparatus F 23; electric heating H 05 B) [4]

F 27 B

FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS

Note

Attention is drawn to the references and Notes following the title of class F 27 and the Note III following the Contents of Section of section H.

Shaft or like vertical or substantially vertical furnaces (for preheating, burning, calcining or cooling lime, magnesia or dolomite C 04 B 2/12)

with two or more shafts or chambers, e.g. multi-storey

Combinations or arrangements of shafts

of other than up-draught type

heated otherwise than by solid fuel mixed with charge

heated electrically [4]

Details, accessories, or equipment peculiar to furnaces of these types

Shells or casings; Supports therefor

Arrangements of linings (linings in general F 27 D 1/00)

Arrangements of tuyeres

Arrangements of dust collectors

Arrangement of devices for charging [4]

Arrangement of devices for discharging [4]

Arrangements of heat-exchange apparatus (heat-exchangers in general F 28 C, F 28 D)

Cooling arrangements

Arrangements of controlling devices

Arrangements of monitoring devices, of indicators, of alarm devices

Hearth-type furnaces, e.g. of reverberatory type (F 27 B 9/00 to F 27 B 15/00, F 27 B 21/00 take precedence); Electric arc furnaces [4]

of single-chamber fixed-hearth type

of multiple-hearth type; of multiple-chamber type; Combinations of hearth-type furnaces

with movable working chambers or hearths, e.g. tiltable

heated electrically, e.g. electric arc furnaces, with or without any other source of heat

Details, accessories, or equipment, e.g. dust-collectors, peculiar to hearth-type furnaces

Working chambers or casings; Supports therefor

Arrangements of linings

Walls; Roofs

Arrangement of devices for charging [4]

Arrangement of devices for discharging [4]

Arrangements of heating devices

Arrangements of air or gas supply devices

Cooling arrangements

Arrangements of heat-exchange apparatus

Arrangement of controlling, monitoring, alarm or like devices [4]

Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated (F 27 B 9/00 takes precedence)

of multiple-chamber type

adapted for treating the charge in vacuum or special atmosphere

in vacuum [5]

Details, accessories, or equipment peculiar to furnaces of these types

Arrangements of linings

Muffles

Arrangement of devices for charging [4]

Arrangement of devices for discharging [4]

Arrangements of heating devices

Arrangements of air or gas supply devices

Arrangement of controlling, monitoring, alarm or like devices [4]

Rotary-drum furnaces, i.e. horizontal or slightly inclined

of multiple-chamber or multiple-drum type

with longitudinal divisions

adapted for treating the charge in vacuum or special atmosphere

externally heated

internally heated, e.g. by means of passages in the wall

tiltable

with means for agitating or moving the charge

the means being fixed relatively to the drum (F 27 B 7/04 takes precedence)

the means being movable within the drum

Details, accessories, or equipment peculiar to rotary-drum furnaces

Rotary drums; Supports therefor

Seals between rotary and stationary parts

Drives

Arrangements of linings

Arrangements of partitions

Arrangement of devices for charging [4]

Arrangement of devices for discharging [4]

Arrangements of heating devices

Arrangements of air or gas supply devices

Arrangements of cooling devices

Planetary coolers [4]

Arrangement of controlling, monitoring, alarm or like devices [4]

Furnaces through which the charge is moved mechanically, e.g. of tunnel type (F 27 B 7/14 takes precedence); Similar furnaces in which the charge moves by gravity

of multiple-track type; of multiple-chamber type; Combinations of furnaces

adapted for treating the charge in vacuum or special atmosphere

heated without contact between combustion gases and charge; electrically heated

heated through chamber walls

heated by hot air or gas

with special arrangements for preheating or cooling the charge

characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment (F 27 B 9/28 takes precedence; travelling or movable supports or containers for the charge F 27 D 3/12)

the charge moving in a circular or arcuate path

under the action of scrapers or pushers

the charge moving in a substantially straight path

under the action of scrapers or pushers (F 27 B 9/26 takes precedence)

being carried by a conveyer

on or in trucks, sleds, or containers

for treating continuous lengths of work

Details, accessories, or equipment peculiar to furnaces of these types

Casings

Arrangements of linings

Arrangements of heating devices

Arrangement of devices for charging [4]

Arrangement of devices for discharging [4]

Arrangements of controlling or monitoring devices

11/

Bell-type furnaces (for treating metal strips or wire C 21 D 9/663)

13/

Furnaces with both stationary charge and progression of heating, e.g. of ring type, of type in which segmental kiln moves over stationary charge

13/

of multiple-chamber type with permanent partitions; Combinations of furnaces

13/

of single-chamber type with temporary partitions

13/

Details, accessories, or equipment peculiar to furnaces of this type

13/

Casings

13/

Arrangements of linings

13/

Arrangements of heating devices

13/

Arrangement of controlling, monitoring, alarm or like devices [4]

14/

Crucible or pot furnaces; Tank furnaces [4]

14/

with tilting or rocking arrangements (F 27 B 14/04 takes precedence)

14/

adapted for treating the charge in vacuum or special atmosphere

14/

heated electrically, e.g. induction crucible furnaces, with or without any other source of heat (F 27 B 14/04 takes precedence)

14/

Details peculiar to crucible, pot or tank furnaces [4]

14/

Crucibles

14/

Covers therefor

14/

Arrangements of heating devices

14/

Arrangement of devices for charging [4]

14/

Arrangement of devices for discharging [4]

14/

Arrangement of controlling, monitoring, alarm or like devices [4]

15/

Fluidised-bed furnaces; Other furnaces using or treating finely-divided materials in dispersion

15/

Details, accessories, or equipment peculiar to furnaces of these types

15/

Casings; Supports therefor

15/

Arrangements of linings

15/

Arrangement of devices for charging [4]

15/

Arrangement of devices for discharging [4]

15/

Arrangements of air or gas supply devices

15/

Arrangements of dust collectors

15/

Arrangements of heating devices

15/

Arrangements of cooling devices

15/

Arrangements of controlling devices

15/

Arrangements of monitoring devices, of indicators, of alarm devices

17/

Furnaces of a kind not covered by any preceding group (structural combinations of furnaces F 27 B 19/02)

17/

specially designed for laboratory use

19/

Combinations of furnaces of kinds not covered by a single preceding main group

19/

combined in one structure

19/

arranged for associated working

21/

Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction

21/

Sintering grates or tables

21/

Sintering pots or sintering pans

21/

Endless-strand sintering machines

21/

Details, accessories, or equipment peculiar to sintering or like apparatus [4]

21/

Arrangement of devices for charging [4]

21/

Arrangement of devices for discharging [4]

21/

Arrangement of controlling, monitoring, alarm or like devices [4]