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IPC 7
F27-F27B02114

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


F 27FURNACES; 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 A21B, glass melting furnaces C03B, coke or gas-making apparatus C10B, C10J, apparatus for cracking hydrocarbons C10G, blast furnaces C21B, converters for making steel C21C, furnaces for heat treatment of metal C21D; furnaces for electroslag or arc remelting of metals C22B 9/00; enamelling ovens C23D; combustion apparatus F23; electric heating H05B) [4]


F 27 BFURNACES, 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 F27 and the Note III following the Contents of Section of section H.


Subclass Index

FURNACES WITH STATIONARY CHARGE 

Shaft furnaces 

F27B 1/00 

Horizontal furnaces 

F27B 3/00, F27B 5/00 

Bell-type furnaces 

F27B 11/00 

With progression of heating 

F27B 13/00 

Crucible furnaces, tank furnaces 

F27B 14/00 

STATIONARY FURNACES WITH MECHANICALLY-MOVED CHARGE 

F27B 9/00 

ROTARY FURNACES 

F27B 7/00, F27B 13/00 

OTHER FURNACES; COMBINATIONS 

F27B 15/00, F27B 17/00; F27B 19/00 

OPEN SINTERING OR LIKE APPARATUS 

F27B 21/00 



1/

00Shaft or like vertical or substantially vertical furnaces (for preheating, burning, calcining or cooling lime, magnesia or dolomite C04B 2/12)

1/

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

1/

04..Combinations or arrangements of shafts

1/

06.of other than up-draught type

1/

08.heated otherwise than by solid fuel mixed with charge

1/

09..heated electrically  [4]

1/

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

1/

12..Shells or casings; Supports therefor

1/

14...Arrangements of linings (linings in general F27D 1/00)

1/

16..Arrangements of tuyères

1/

18..Arrangements of dust collectors

1/

20..Arrangement of devices for charging  [4]

1/

21..Arrangement of devices for discharging  [4]

1/

22..Arrangements of heat-exchange apparatus (heat-exchangers in general F28C, F28D)

1/

24..Cooling arrangements

1/

26..Arrangements of controlling devices

1/

28..Arrangements of monitoring devices, of indicators, of alarm devices


3/

00Hearth-type furnaces, e.g. of reverberatory type (F27B 9/00 to F27B 15/00, F27B 21/00 take precedence); Electric arc furnaces  [4]

3/

02.of single-chamber fixed-hearth type

3/

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

3/

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

3/

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

3/

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

3/

12..Working chambers or casings; Supports therefor

3/

14...Arrangements of linings

3/

16...Walls; Roofs

3/

18..Arrangement of devices for charging  [4]

3/

19..Arrangement of devices for discharging  [4]

3/

20..Arrangements of heating devices

3/

22..Arrangements of air or gas supply devices

3/

24..Cooling arrangements

3/

26..Arrangements of heat-exchange apparatus

3/

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


5/

00Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated (F27B 9/00 takes precedence)

5/

02.of multiple-chamber type

5/

04.adapted for treating the charge in vacuum or special atmosphere

5/

05..in vacuum  [5]

5/

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

5/

08..Arrangements of linings

5/

10..Muffles

5/

12..Arrangement of devices for charging  [4]

5/

13..Arrangement of devices for discharging  [4]

5/

14..Arrangements of heating devices

5/

16..Arrangements of air or gas supply devices

5/

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


7/

00Rotary-drum furnaces, i.e. horizontal or slightly inclined

7/

02.of multiple-chamber or multiple-drum type

7/

04..with longitudinal divisions

7/

06.adapted for treating the charge in vacuum or special atmosphere

7/

08.externally heated

7/

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

7/

12.tiltable

7/

14.with means for agitating or moving the charge

7/

16..the means being fixed relatively to the drum (F27B 7/04 takes precedence)

7/

18..the means being movable within the drum

7/

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

7/

22..Rotary drums; Supports therefor

7/

24...Seals between rotary and stationary parts

7/

26..Drives

7/

28..Arrangements of linings

7/

30..Arrangements of partitions

7/

32..Arrangement of devices for charging  [4]

7/

33..Arrangement of devices for discharging  [4]

7/

34..Arrangements of heating devices

7/

36..Arrangements of air or gas supply devices

7/

38..Arrangements of cooling devices

7/

40...Planetary coolers  [4]

7/

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


9/

00Furnaces 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

9/

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

9/

04.adapted for treating the charge in vacuum or special atmosphere

9/

06.heated without contact between combustion gases and charge; electrically heated

9/

08..heated through chamber walls

9/

10..heated by hot air or gas

9/

12.with special arrangements for preheating or cooling the charge

9/

14.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)

9/

16..the charge moving in a circular or arcuate path

9/

18...under the action of scrapers or pushers

9/

20..the charge moving in a substantially straight path

9/

22...under the action of scrapers or pushers (F27B 9/26 takes precedence)

9/

24...being carried by a conveyer

9/

26...on or in trucks, sleds, or containers

9/

28.for treating continuous lengths of work

9/

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

9/

32..Casings

9/

34...Arrangements of linings

9/

36..Arrangements of heating devices

9/

38..Arrangement of devices for charging  [4]

9/

39..Arrangement of devices for discharging  [4]

9/

40..Arrangements of controlling or monitoring devices


11/

00Bell-type furnaces (for treating metal strips or wire C21D 9/663)


13/

00Furnaces with both stationary charge and progression of heating, e.g. of ring type, of type in which segmental kiln moves over stationary charge

13/

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

13/

04.of single-chamber type with temporary partitions

13/

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

13/

08..Casings

13/

10...Arrangements of linings

13/

12..Arrangements of heating devices

13/

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


14/

00Crucible or pot furnaces; Tank furnaces  [4]

14/

02.with tilting or rocking arrangements (F27B 14/04 takes precedence)

14/

04.adapted for treating the charge in vacuum or special atmosphere

14/

06.heated electrically, e.g. induction crucible furnaces, with or without any other source of heat (F27B 14/04 takes precedence)

14/

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

14/

10..Crucibles

14/

12...Covers therefor

14/

14..Arrangements of heating devices

14/

16..Arrangement of devices for charging  [4]

14/

18..Arrangement of devices for discharging  [4]

14/

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


15/

00Fluidised-bed furnaces; Other furnaces using or treating finely-divided materials in dispersion (fluidised bed combustion apparatus F23C 10/00)

15/

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

15/

04..Casings; Supports therefor

15/

06...Arrangements of linings

15/

08..Arrangement of devices for charging  [4]

15/

09..Arrangement of devices for discharging  [4]

15/

10..Arrangements of air or gas supply devices

15/

12..Arrangements of dust collectors

15/

14..Arrangements of heating devices

15/

16..Arrangements of cooling devices

15/

18..Arrangements of controlling devices

15/

20..Arrangements of monitoring devices, of indicators, of alarm devices


17/

00Furnaces of a kind not covered by any preceding group (structural combinations of furnaces F27B 19/02)

17/

02.specially designed for laboratory use


19/

00Combinations of furnaces of kinds not covered by a single preceding main group

19/

02.combined in one structure

19/

04.arranged for associated working


21/

00Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction

21/

02.Sintering grates or tables

21/

04.Sintering pots or sintering pans

21/

06.Endless-strand sintering machines

21/

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

21/

10..Arrangement of devices for charging  [4]

21/

12..Arrangement of devices for discharging  [4]

21/

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


  
 

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