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DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE (combustion apparatus F23)
Definition statement
This subclass/group covers:

Details, accessories of furnaces, kilns or ovens in general, not for specific furnaces, kilns or ovens

Relationship between large subject matter areas

The details or accessories for specific furnaces, kilns or ovens are classified in F27B subgroups

Special rules of classification within this subclass

Indexing Codes should be used as additional information or in case an CPC symbol is given and more detailed Indexing Codes are existing, these more detailed Indexing Codes should also be given.

Casings; Linings; Walls; Roofs (refractory materials C04B; firebridges for combustion chambers F23M 3/00)
Informative references
Attention is drawn to the following places, which may be of interest for search:

Linings for casting-melt holding vessels

Clay-wares and shaped ceramic products

Walls, e.g. partitions, for buildings

Protection of pipes or pipe fittings; thermal insulation in general

Shape of bricks or blocks used in combustion chambers

{Linings or walls comprising heat shields, e.g. heat shieldsd (shields protecting the charge F27D 5/00)}
Informative references
Attention is drawn to the following places, which may be of interest for search:

Shields protecting the charge

Crowns; Roofs
Informative references
Attention is drawn to the following places, which may be of interest for search:

Crowns and roofs in combustion chambers

Monolithic linings; Supports therefor
Informative references
Attention is drawn to the following places, which may be of interest for search:

Supports for linings

Heat-exchange apparatus

Supports for linings (F27D 1/10 takes precedence)
References relevant to classification in this group
This subclass/group does not cover:

Supports for monolithic linings

Making or repairing linings {increasing the durability of linings or breaking away linings}
Informative references
Attention is drawn to the following places, which may be of interest for search:

Equipment used for making or repairing linings, e.g. by flame gunning

Charging; Discharging; Manipulation of charge (moving charge through a furnace F27B 9/14)
Informative references
Attention is drawn to the following places, which may be of interest for search:

Charging of the electric furnace

Moving charge through furnace

{of metallic workpieces}
Informative references
Attention is drawn to the following places, which may be of interest for search:

Charging, discharging and manipulation of charges in heat treatment furnaces, e.g. with rolls

{transport or conveyer rolls for furnaces; roller rails (conveyer rolls in general B65G)}
Informative references
Attention is drawn to the following places, which may be of interest for search:

Rollers in rolling mills

Rolls in continuous casting

Conveyor rolls in general

Roller conveyors for transporting glass sheets

Screw feeders; Screw dischargers
Informative references
Attention is drawn to the following places, which may be of interest for search:

Screw conveyors in general

Screw conveyors in general processes

Tapping equipment; Equipment for removing {or retaining} slag
Informative references
Attention is drawn to the following places, which may be of interest for search:

Closure equipment in casting melt-holding vessels

Tap-holes and repairing top-holes in steel making converters

{Taphole forming equipment, e.g. boring machines, piercing tools}
Informative references
Attention is drawn to the following places, which may be of interest for search:

Opening or sealing the tap-hole of blast furnaces

Introducing a fluid jet or current into the charge {(porous elements for gas flushing of molten metals B22D 1/005)}
Informative references
Attention is drawn to the following places, which may be of interest for search:

Injection assemblies for treating melt in ladles or runners before casting

Devices for accelerating or decelerating flow of the materials

Bottoms or tuyeres for converters

Burners or injectors for injecting pulverulent materials into the furnace

Injection of gases into liquid metals in ladles

Treating molten ferrous alloy by injecting powdered material

Tuyeres for blast furnaces

Charging particulate material using a fluid carrier
Informative references
Attention is drawn to the following places, which may be of interest for search:

Lances or injectors for steel production in converters

Burners or injectors for injecting gas

Supports, screens, or the like for the charge within the furnace (travelling or movable supports F27D 3/12)
Informative references
Attention is drawn to the following places, which may be of interest for search:

Setting, e.g. drying, dehydrating or firing ceramic articles

Supports, baskets, containers or covers for heat treatment

Details of grates for burning waste materials

Elements for supporting goods to be dried

Travelling or movable supports

{Treatment baskets for ceramic articles (for metallic articles C21D 9/0025)}
Informative references
Attention is drawn to the following places, which may be of interest for search:

Treatment baskets for metallic articles

{Shields for the charge (shields for the lining F27D 1/0033)}
Informative references
Attention is drawn to the following places, which may be of interest for search:

Shields for the lining

Forming, maintaining, or circulating atmospheres in heating chambers
Informative references
Attention is drawn to the following places, which may be of interest for search:

General devices for heat treatment with forced gas circulation; under reduced pressure or vacuum

Arrangement of elements for electric heating in or on furnaces (electric heating per se H05B)
Informative references
Attention is drawn to the following places, which may be of interest for search:

Electric heating in general

Ohmic resistance heating
Informative references
Attention is drawn to the following places, which may be of interest for search:

Ohmic resistance heating in general and specially adapted for furnaces

Disposition of electrodes (automatic control of temperature G05D 23/00; electric discharge apparatus H01T; arrangements for feeding or guiding electrodes H05B 7/10; automatic control of power by positioning of electrodes H05B 7/144)
Informative references
Attention is drawn to the following places, which may be of interest for search:

Arrangements of feeding or guiding electrodes

Automatic control of power by positioning of electrodes

Control of temperature

{Preheating scrap (preheating of scrap for steel making C21C 5/565)}
Informative references
Attention is drawn to the following places, which may be of interest for search:

Preheating of scrap for steel production

{comprising a cooling grate}
Definition statement
This subclass/group covers:

Cooling of discharged material comprising a cooling grate.

Informative references
Attention is drawn to the following places, which may be of interest for search:

Conveyers in general comprising a cyclically-moving

Heat-exchange apparatus, whereby particulate material forming a bed, e.g. fluidised, on vibratory sieves

{Extraction of waste gases, collection of fumes and hoods used therefor (in general B08B 15/00)}
Informative references
Attention is drawn to the following places, which may be of interest for search:

Preventing escape of dirt or fumes from the area where they are produced

Removal of waste gases or dust coming from steel making converters

{of waste gases emanating from an electric arc furnace}
Informative references
Attention is drawn to the following places, which may be of interest for search:

Working up flue dust

Arrangements of controlling devices
Informative references
Attention is drawn to the following places, which may be of interest for search:

Arrangement of controlling devices in shaft furnaces

Arrangement of controlling devices in hearth type furnaces

Arrangement of controlling devices in muffle furnaces

Arrangement of controlling devices in rotary drum furnaces

Arrangement of controlling devices in tunnel furnaces

Arrangement of controlling devices in ring type furnaces

Arrangement of controlling devices in crucible or pot furnaces

Arrangement of controlling devices in fluidized bed furnaces

Arrangements of monitoring devices; Arrangements of safety devices
Informative references
Attention is drawn to the following places, which may be of interest for search:

Test rods or other checking devices in blast furnaces

Measuring and sampling devices in steel making converters

Arrangement of monitoring devices in shaft furnaces

Arrangement of monitoring devices in ring type furnaces

Arrangement of monitoring devices in crucible or pot furnaces

Arrangement of monitoring devices in fluidized bed furnaces

Arrangement of monitoring devices in hearth type furnaces

Arrangement of monitoring devices in muffle furnaces

Arrangement of monitoring devices in rotary drum furnaces

Arrangement of monitoring devices in tunnel furnaces

Measuring temperature and heat quantity in general

{comprising breaking tools, e.g. hammers, drills, scrapers (breaking away linings F27D 1/1694; boring machines for forming tapholes F27D 3/1527)}
Definition statement
This subclass/group covers:

Devices for removing incrustations, e.g. slag, metal deposits, dust,

comprising breaking tools like hammers, drills, scrapers;

Informative references
Attention is drawn to the following places, which may be of interest for search:

Breaking away linings

Boring machines for forming tap-holes

Stirring devices for molten material (F27D 3/14 takes precedence)
Informative references
Attention is drawn to the following places, which may be of interest for search:

Mixers in general

Refining metals including stirring

Electrodynamics pumps

Subject matter not provided for in other groups of this subclass
Definition statement
This subclass/group covers:

Details or accessories not covered by any preceding group

{Electric heating elements or system}
Informative references
Attention is drawn to the following places, which may be of interest for search:

Electric heating in general

{using burners (manufacture of steel in an electric arc furnace equipped with burners C21C 5/5217)}
Informative references
Attention is drawn to the following places, which may be of interest for search:

Burners used for glass melting

Manufacture of steel in electric arc furnaces equipped with burners

Burners in combustion in general

Burners for combustion of gas in general

F27D14/00 - F27D14/84

This page is owned by Office of Patent Classification.
Last Modified: 10/11/2013