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
 F22
STEAM GENERATION (chemical or physical apparatus for generating gases B01J; chemical generation of gas, e.g. under pressure, Section C; removal of combustion products or residues, e.g. cleaning of the combustion contaminated surfaces of tubes of boilers, F23J; generating combustion products of high pressure or high velocity F23R; water heaters not for steam generation F24H, F28; cleaning of internal or external surfaces of heat-transfer conduits, e.g. water tubes of boilers, F28G)
 F22

Note(s)

In this class, the following term is used with the meaning indicated:

  • "steam" covers also other condensable vapours, e.g. mercury, diphenyl, diphenyl oxide.

 F22B
METHODS OF STEAM GENERATION; STEAM BOILERS (steam engine plants where engine aspects predominate F01K; domestic central-heating systems using steam F24D; heat exchange or heat transfer in general F28; generation of vapour in the cores of nuclear reactors G21)
 F22B

Note(s)

This subclass covers only methods of, or apparatus for, the generation of steam under pressure for heating or power purposes.

 F22B
Subclass index
METHODS FOR STEAM GENERATION 1/00, 3/00
STEAM BOILERS
General characteristics
having drum; having furnace tube; having fire tube; having combined fire tube and water tube; having fire-box 5/00; 7/00; 9/00; 11/00; 13/00
having water tubes
auxiliary tubes 11/00
horizontal; horizontally-inclined; combined horizontally-inclined and vertical; vertical or steeply-inclined 15/00; 17/00; 19/00; 21/00
formed of sets of spaced double-walled water tubes or of return tubes; water tubes with internally-arranged flue tubes 23/00; 25/00
Special characteristics 27/00, 29/00
Modifications or arrangements; details of general application 31/00; 37/00
PLANTS; CONTROL SYSTEMS 33/00; 35/00
P:0 F22B 1/00
Methods of steam generation characterised by form of heating method (use of solar heat F24J 2/00; jackets or other cooling means in which steam is generated and which serve for cooling other apparatus, see the subclasses for such apparatus)
P:10 F22B 3/00
Other methods of steam generation; Steam boilers not provided for in other groups of this subclass
P:170 F22B 5/00
Steam boilers of drum type, i.e. without internal furnace or fire tubes, the boiler body being contacted externally by flue gas
P:160 F22B 7/00
Steam boilers of furnace-tube type, i.e. the combustion of fuel being performed inside one or more furnace tubes built-in in the boiler body
P:150 F22B 9/00
Steam boilers of fire-tube type, i.e. the flue gas from a combustion chamber outside the boiler body flowing through tubes built-in in the boiler body
P:80 F22B 11/00
Steam boilers of combined fire-tube type and water-tube type, i.e. steam boilers of fire-tube type having auxiliary water tubes
P:140 F22B 13/00
Steam boilers of fire-box type, i.e. the combustion of fuel being performed in a chamber or fire-box with subsequent flue(s) or fire tube(s), both chamber or fire-box and flues or fire tubes being built-in in the boiler body
P:110 F22B 15/00
Water-tube boilers of horizontal type, i.e. the water-tube sets being arranged horizontally
P:120 F22B 17/00
Water-tube boilers of horizontally-inclined type, i.e. the water-tube sets being inclined slightly with respect to the horizontal plane
P:100 F22B 19/00
Water-tube boilers of combined horizontally-inclined type and vertical type, i.e. water-tube boilers of horizontally-inclined type having auxiliary water-tube sets in vertical or substantially-vertical arrangement
P:130 F22B 21/00
Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
P:90 F22B 23/00
Water-tube boilers built-up from sets of spaced double-walled water tubes of return type in unilaterial abutting connection with a boiler drum or with a header box, i.e. built-up from Field water tubes comprising an inner tube arranged within an outer unilaterally-closed tube
P:70 F22B 25/00
Water-tube boilers built-up from sets of water tubes with internally-arranged flue tubes, or fire tubes, extending through the water tubes
P:50 F22B 27/00
Instantaneous or flash steam boilers
P:60 F22B 29/00
Steam boilers of forced-flow type
P:40 F22B 31/00
Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements or dispositions of combustion apparatus (steam generation characterised by heating method F22B 1/00; combustion apparatus per se F23)
 F22B 33/00 - 
F22B 35/00
Steam-generation plants; Control systems
P:30 F22B 33/00
Steam-generation plants, e.g. comprising steam boilers of different types in mutual association (arrangements or dispositions of steam-generation plants in marine vessels B63H 21/00)
P:20 F22B 35/00
Control systems for steam boilers (regulation or control of steam power plants F01K 7/00; for regulating feed-water supply F22D; for controlling superheat temperature F22G 5/00; control of combustion F23N)
P:180 F22B 37/00
Component parts or details of steam boilers (venting devices F16K 24/00; steam traps or like apparatus F16T; construction of tube walls of boiler furnaces F23M 5/00)