F
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
 F01 - 
F04
Subsection index
MACHINES
positive displacement
rotary or oscillating piston
liquid and elastic fluid or elastic fluidF01C
liquid onlyF04C
reciprocating piston or other
liquid and elastic fluid or elastic fluidF01B
liquid onlyF04B
non-positive displacement
liquid and elastic fluid or elastic fluidF01D
liquid onlyF03B
ENGINES
positive displacement
rotary or oscillating piston
liquid and elastic fluid or elastic fluidF01C
liquid onlyF03C
reciprocating piston or other
liquid and elastic fluid or elastic fluidF01B
liquid onlyF03C
non-positive displacement
liquid and elastic fluid or elastic fluidF01D
liquid onlyF03B
PUMPS
positive displacement
rotary or oscillating pistonF04C
reciprocating piston or otherF04B
non-positive displacementF04D
  
LIGHTING; HEATING
 F27
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 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]
 F27

Note(s)

  1. This class covers:
    • furnaces, kilns, ovens, retorts, open sintering apparatus and other similar apparatus for heat treatment of materials or articles, and details or accessories therefor, in general;
    • the arrangement of electrical heating elements in or on furnaces.
  2. This class does not cover:
    • combustion apparatus per se, i.e. apparatus for direct combination of oxygen gas and a burnable substance; [7]
    • electrical heating elements per se;
    • processes carried on within the furnaces.
  3. In this class, the following term is used with the meaning indicated:
    • "furnaces" covers kilns, ovens, or retorts.
 F27B
FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
 F27B

Note(s)

Attention is drawn to the references and Notes following the title of class F27 and the Note (3) of section H.

 F27B
Subclass index
FURNACES WITH STATIONARY CHARGE
Shaft furnaces 1/00
Horizontal furnaces 3/00, 5/00
Bell-type furnaces 11/00
With progression of heating 13/00
Crucible furnaces, tank furnaces 14/00
STATIONARY FURNACES WITH MECHANICALLY-MOVED CHARGE 9/00
ROTARY FURNACES 7/00, 13/00
OTHER FURNACES; COMBINATIONS 15/00, 17/00; 19/00
OPEN SINTERING OR LIKE APPARATUS 21/00
P:40 F27B 1/00
Shaft or like vertical or substantially vertical furnaces (for preheating, burning, calcining or cooling lime, magnesia or dolomite C04B 2/00)
P:90 F27B 3/00
Hearth-type furnaces, e.g. of reverberatory type (F27B 9/00-F27B 15/00, F27B 21/00 take precedence); Electric arc furnaces  [4]
 F27B 3/08
·  heated electrically, e.g. electric arc furnaces, with or without any other source of heat
 F27B 3/10
·  Details, accessories, or equipment, e.g. dust-collectors, peculiar to hearth-type furnaces
 F27B 3/20
·  ·  Arrangements of heating devices
P:60 F27B 5/00
Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated (F27B 9/00 takes precedence)
P:10 F27B 7/00
Rotary-drum furnaces, i.e. horizontal or slightly inclined
 F27B 7/20
·  Details, accessories, or equipment peculiar to rotary-drum furnaces
P:20 F27B 9/00
Furnaces through which the charge is moved mechanically, e.g. of tunnel type (F27B 7/00 takes precedence); Similar furnaces in which the charge moves by gravity
 F27B 9/30
·  Details, accessories, or equipment peculiar to furnaces of these types
P:70 F27B 11/00
Bell-type furnaces (for treating metal strips or wire C21D 9/54)
P:50 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 stationary charge
P:80 F27B 14/00
Crucible or pot furnaces; Tank furnaces  [4]
P:30 F27B 15/00
Fluidised-bed furnaces; Other furnaces using or treating finely-divided materials in dispersion (combustion apparatus in which combustion takes place in a fluidised bed of fuel or other particles F23C 10/00)
P:100 F27B 17/00
Furnaces of a kind not covered by any of groups F27B 1/00-F27B 15/00 (structural combinations of furnaces F27B 19/00)
P:0 F27B 19/00
Combinations of different kinds of furnaces that are not all covered by any single one of main groups F27B 1/00-F27B 17/00
P:110 F27B 21/00
Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction