Skip over navigation
Printable version [PDF]
CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN ({household tools and machines for pulverising foodstuffs, e.g. coffee and spice mills A47J 42/00; pharmaceutical mortars A61J 3/02; mechanical processing of refuse and garbage B03B 9/06; dressing mould materials by grinding B22C 5/04}; obtaining metallic powder by crushing, grinding or milling B22F 9/04; { recovery of plastics by desintegration B29B 17/00; crushing raw materials in starch making C08B 30/02; beaters for papermaking D21D 1/02; crushing devices specially for transport in mines E21F 13/002; slag crushing devices F23J 1/00; fuel milling devices in combustion apparatus F23K 1/00; household devices for crushing coal F24B 15/02; ice desintegrating devices F25C 5/02})
Definition statement
This subclass covers:
  • Apparatus and methods for crushing, pulverizing, comminuting, disintegrating by using reciprocating or rotary crushers, by using rollers or balls, discs or rotary beaters, by tumbling, by using knives or other cutting or tearing members, by using fluid jets.
  • Auxiliary devices, accessories for such devices e.g. safety, and auxiliary methods.
  • Whole disintegration plants.
  • Control arrangements for crushing or disintegrating.
  • Combinations of such apparatus with other devices, e.g. for separating or sorting.
Informative references
Attention is drawn to the following places, which may be of interest for search:

Preparing specimens for investigation involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising

Crushing or disintegrating by reciprocating members
Definition statement
This group covers:

Crushing where the crushing or disintegrating members are only reciprocating.

Mills with non-rotating spiked members
References relevant to classification in this group
This subgroup does not cover:

Disintegrating devices with spiked members specially adapted for breaking-up bottles: B02C 19/0081.

Crushing or disintegrating by gyratory or cone crushers {(with non-coaxial discs with intersecting axes B02C 7/005)}
Definition statement
This group covers:

Crushers with a gyrating conical head and a bowl assembly surrounding the head; normally the head is driven.

References relevant to classification in this group
This group does not cover:

Cone crushers with non-coaxial discs with intersecting axes

Crushing or disintegrating by roller mills (with milling members in the form of rollers or balls co-operating with rings or discs B02C 15/00; roller mills or roll refiners exclusively for chocolate A23G 1/10, A23G 1/12)
Definition statement
This group covers:

Roller mills with two or more rollers; with a roller co-operating with a stationary member like a plate, a bar a grid or grating or co-operating with a conveyor.

References relevant to classification in this group
This group does not cover:

Roller mills with milling members in the form of rollers or balls co-operating with rings or discs

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

Roller mills or roll refiners exclusively for chocolate

Presses characterised by the use of rotary pressing members, e.g. rollers, rings, discs

Special rules of classification within this group

In the cases where the roller mill is adapted for milling a paste-like material or grain, the document is classified in the appropriate subgroup of B02C 4/00, e.g. B02C 4/04, B02C 4/06, B02C 4/22. For searching, other classes, where the roller mill is not adapted for the specific material concerned, have to be considered.

Crushing or disintegrating by disc mills (apparatus specially adapted for manufacture or treatment of cocoa or cocoa products exclusively A23G 1/04)
Definition statement
This group covers:

Disc mills used to grind, fiberize, pulverize, granulate or refine a feedstock which is fed between opposing discs or plates. The discs may be grooved, serrated or spiked.

References relevant to classification in this group
This group does not cover:

Apparatus specially adapted for manufacture or treatment of cocoa or cocoa products

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

Discs for disc mills for refining paper pulp

Other milling methods or mills specially adapted for grain
Definition statement
This group covers:

Methods or mills, systems, plants or sequences of operations specially adapted for grain with the meaning of cereal grain.

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

Combined processes for grain treatment

Other auxiliary devices or accessories specially adapted for grain mills
Definition statement
This group covers:

All auxiliary devices and accessories specially adapted for grain mills like disagglomerators, special sifting and separating, feeding, cooling, heating, conditioning arrangements.

Disintegrating by mills having rotary beater elements; {Hammer mills}
Definition statement
This group covers:

Mills with beaters rigidly connected or hinged for swinging movement to a horizontally or vertically arranged rotor for crushing material by impact. The material may be thrown against an anvil or impact member.

References relevant to classification in this group
This group does not cover:

Devices for disintegrating materials by collision of these materials against a breaking surface or breaking body and/or by friction between the material particles (also for gra)

with intermeshing pins; {Pin Disk Mills}
Special rules of classification within this group

Mills with intermeshing elements like pins or other impact members, where both disks are rotating, are additionally classified in B02C 13/205.

Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs {(high-speed drum mills B02C 19/11)}
Definition statement
This group covers:

Mills with rollers or balls co-operating with stationary or rotating rings arranged according to the titles of the sub-groups; many for coal or ore.

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

Cocoa; Cocoa products, e.g. chocolate; Substitutes therefore; Mixing apparatus; Roller mills for preparing chocolate

Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force

Selective separation of solid materials carried by, or dispersed in, gas currents, gas currents using centrifugal force, generated by rotating vanes, discs, drums, or brushes

Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by grinding, blending, mixing, kneading, or stirring

Casting in, on, or around objects which form part of the product; for manufacturing or repairing tools

Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus

Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls (high-speed drum mills B02C 19/11; {drums for polishing or grinding B24B})
Definition statement
This group covers:

Mills having a rotating, perforated or un-perforated or a fixed container, charged with the material to be disintegrated, with or without special disintegrating members such as pebbles or balls, and/or with or without special stirring means; feeding and discharging devices with the associated sorting or separating arrangements.

Shape, material of grinding media, e.g. balls, pebbles, rods.

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

Medicinal preparations characterised by special physical form; Particulate form, e.g. powders

Mixing

Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefore; involving rotary barrels

Special rules of classification within this group

Discharging devices combined with sorting or separating of material, as well as adding fluid, other than for crushing by fluid energy are classified in the appropriate sub-groups of B02C 17/1835 and B02C 17/186 and not in the sub-groups of B02C 23/08 and B02C 23/18. For searching the B02C 23/00 and subgroups should be considered.

Disintegrating by knives or other cutting or tearing members which chop material into fragments {(tree stump comminutors A01G 23/067)}
Definition statement
This group covers:
  • Shredding of material into fragments; knives therefore and mountings thereof; feed or discharge means therefore.
  • Mincing machines with perforated discs and feeding worms.
Informative references
Attention is drawn to the following places, which may be of interest for search:

Cutting apparatus specially adapted for cutting hay, straw or the like

Cutting implements specially adapted for horticultural purposes, for comminuting plant waste

Forestry; extracting or eliminating stumps by comminuting the tree stumps

Fodder distributors with mixer or shredder

Processing meat, poultry or fish

Fodder mashers

Kitchen equipment; coffee mills; spice mills; apparatus for making beverages

Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven

Cutting; Details common to machines for perforating, punching, cutting-out, stamping-out or severing

Cutting through work characterised by the nature or movement of the cutting member; Apparatus or machines therefore; Cutting members therefore

Manufacture of wood shavings, chips, powder, or the like

Working of plastics; Conditioning or physical treatment of the material to be shaped by grinding, e.g. by triturating; by sieving; by filtering

Recovery of plastics or other constituents of waste material containing plastics; Disintegrating plastic

Disintegrating apparatus specially adapted for installation in waste pipes or outlets

Pumps adapted for handling specific fluids with means for comminuting, mixing stirring or otherwise treating

Details
Definition statement
This subgroup covers:

Details in relation to the shredder housing, jam prevention, safety, lubrication of the knives and the like.

References relevant to classification in this group
This subgroup does not cover:

Disintegrating by knives or other cutting or tearing members which chop materials into fragments, specially adapted for disintegrating documents

Other disintegrating devices or methods (for grain B02C 9/00)
Definition statement
This group covers:
  • Crushing by endless flexible members; by collision of materials against a breaking surface or breaking body and/or by friction between the material particles;
  • Disintegrating devices or methods specially adapted for specific materials;
  • Jet mills; pestle and mortar arrangements; mills in which a friction block is towed along the surface; mills provided with vibrators; use of auxiliary physical effects, e.g. ultrasonics, irradiation, cold or heat for disintegrating; grating; crushing mills with screw-shaped crushing means.
References relevant to classification in this group
This group does not cover:

Rotors with beater elements

{specially adapted for breaking-up fluorescent tubes}
Informative references
Attention is drawn to the following places, which may be of interest for search:

Recovery of material from discharge tubes or lamps

{specially adapted for breaking-up bottles}
Informative references
Attention is drawn to the following places, which may be of interest for search:

Presses specially adapted for consolidating empty containers, e.g. cans

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

Pill breaking or crushing devices

Disintegrating plant with or without drying of the material (for grain B02C 9/04)
Definition statement
This group covers:

Disintegrating plants normally with at least two disintegration devices; transportable disintegration plants may be equipped solely with one crusher or disintegration device.

References relevant to classification in this group
This group does not cover:

Milling plants specially adapted for grain

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

Cutting implements specially adapted for horticultural purposes, for comminuting plant waste

Forestry; extracting or eliminating stumps by comminuting the tree stumps

Transportable screening plants

Crushing, pulverising or disintegrating apparatus

Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group ({specially adapted for grain mills B02C 11/00;} separating or sorting in general B03, B04, B07)
Definition statement
This group covers:

Feeding devices, safety devices, disintegrating additives, separating or sorting of material associated with crushing or disintegrating, adding fluid, liquids or gases which are not intended for crushing or disintegrating.

References relevant to classification in this group

Places in relation to which this group is residual:

Feeding devices for gyratory or cone crushers

Feeding devices for roller mills

Feeding devices specially adapted for grain mills

Arrangements for preventing fire or explosion in grain mills

Feeding or discharge for mills having rotary beater elements

Safety devices or measures for mills having rotary beater elements

Feeding or discharging devices for tumbling mills

Feed or discharge means for disintegraters with knives or other cutting or tearing members

Control arrangements specially adapted for crushing or disintegrating
Definition statement
This group covers:

Overall control arrangements and methods.

References relevant to classification in this group
This group does not cover:

Jaw clearance or overload control for jaw crushers

Crushing or disintegrating by gyratory or cone crushers moved by an eccentric weight

Crushing or disintegrating by gyratory or cone crushers eccentrically moved with vertical axis and with bowl adjusting or controlling mechanisms

Adjusting, applying pressure to or controlling the distance between milling members in roller mills

Driving mechanisms; Roller speed control in roller mills

Controlling the distance between discs in disc mills

Controlling the distance between discs in disc mills adapted for grain

Monitoring devices for tumbling mills

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