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DOMESTIC WASHING OR CLEANING (brushes A46B; cleaning quantities of bottles or of other hollow articles of one kind B08B 9/00; laundry D06F) ; SUCTION CLEANERS IN GENERAL (cleaning in general B08)
Definition statement
This subclass/group covers:

The following overview of the main groups indicating the coverage of the subclass A47L is given below.

A detailed description of the covered subject matter at main-group level, e.g. A47L 15/00, is to be found at said main groups.

Cleaning windows, window shades, window screens, venetian blinds, Safety devices for use in window cleaning

Cleaning windows
Safety devices for use in window-cleaning
Cleaning window shades, window screens, venetian blinds

Suction cleaners

Structural features of suction cleaners
Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids
Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners

Machines and implements for cleaning floors, carpets, furniture, walls, or wall coverings:

Machines for cleaning floors, carpets, furniture, walls, or wall coverings
Implements for cleaning floors, carpets, furniture, walls, or wall coverings

Apparatus or implements for cleaning or polishing household articles or the like:

Washing or rinsing machines for crockery or tableware
Apparatus or implements used in manual washing or cleaning of crockery, table-ware, cooking-ware or the like
Drying devices for crockery or table-ware, e.g. tea-cloths
Polishing of table-ware, e.g. knives, forks, spoons
Cleaning footwear
Miscellaneous cleaning devices
References relevant to classification in this subclass
This subclass/group does not cover:
Brushes
Laundry
Machines for cleaning carpets not in position
Informative references
Attention is drawn to the following places, which may be of interest for search:
Cleaning in general
Methods or apparatus for sterilising materials of objects in general
Separation, filtration in general
Cleaning of vehicles
Arrangements for cleaning building façades
Street cleaning; cleaning of permanent ways
Polishing machines in general
Handles
Non-positive displacement pumps
Valves
Pipes; hoses; means for thermal; insulation in general
Control or regulation of non-electric variables
Electric switches
Batteries
Dynamo-electric machines
Control or regulation of electric motors, generators or dynamoelectric convertors
Cleaning of vehicles not otherwise provided for - Other vehicle hand-held cleaning arrangements, e.g. with sponges, brushes, scrapers or the like
Roof working-tools
Special rules of classification within this subclass

Machines or implements which can be used for cleaning windows, window shades, window screens, venetian blinds, as well as floors, carpets, furniture, walls or wall coverings are classified in groups A47L 11/00 or A47L 13/00.

Cleaning windows
Definition statement
This subclass/group covers:

All aspects of cleaning windows including wetting, cleaning and drying of the window surface.

Power-driven machines or devices for cleaning windows, e.g. all machines and devices with a power driven motor, power heating element or the like.

Hand implements for cleaning windows, e.g. all hand operated implements.

References relevant to classification in this group
This subclass/group does not cover:
Implements which can be used for cleaning windows as well as floors, carpets, furniture, walls or wall coverings
Informative references
Attention is drawn to the following places, which may be of interest for search:
Spraying apparatus; Atomising apparatus; Nozzles - Single-unit; Hand-held apparatus
Cleaning or de-icing of aircrafts
Safety devices for use in window-cleaning (safety belts A62B 35/00; for scaffolding in general E04G; for ladders E06C)
Definition statement
This subclass/group covers:

Safety devices specifically for use in window-cleaning such as mounted or suspended platforms and cages attachable to windows/window frames; and safety ropes having securing means or sit portions for window cleaners for home use.

Relationship between large subject matter areas

Platforms and cages supported by building constructions and for performing work in existing buildings - i.e. cleaning of the façade - are classified in E04G 3/00. Safety belts and body harnesses are classified in A62B 35/00. If the only described use of the platform, cage, safety belt or harness is for cleaning windows in the domestic ambit or specially adapted for that use, it is classified under A47L 3/00. Likewise, aspects of platforms, cages, safety belts and harnesses which are specific for cleaning windows are classified in A47L 3/00.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Apparatus for mountaineering - Mountaineering ropes
Apparatus for mountaineering - Safety belts of body harnesses
Work on existing buildings - Scaffold and mobile platforms essentially supported by building constructions.
Devices for preventing persons from falling from ladders
Cleaning window shades, window screens, venetian blinds (A47L 1/15 takes precedence; suction cleaner nozzles A47L 9/02)
Definition statement
This subclass/group covers:

All aspects of cleaning window shades, screens, venetian blinds.

References relevant to classification in this group
This subclass/group does not cover:
Implements which can be used for cleaning window shades, window screens, venetian blinds as well as floors, carpets, furniture, walls or wall coverings
Informative references
Attention is drawn to the following places, which may be of interest for search:
Cleaning windows
Suction cleaners
Structural features of suction cleaners
Definition statement
This subclass/group covers:

All structural features of suction cleaning machines, using suction as major cleaning tool in domestic environments.

With user-driven air-pumps or compressors, e.g. all suction cleaners with manually driven air pumps or compressors

With power-driven air-pumps or compressors, e.g. all suction cleaners with motor driven air pumps or compressors

Hand supported suction cleaners, e.g. all suction cleaners which are dedicated to be used hand supported or as a back-pack.

All upright suction cleaners with wheels and fixed steering handle, e.g. vertical, tank or bucket type

Suction cleaners with hose between nozzle and casing, e.g. horizontal, canister or sledge type

Suction cleaners for fixing on staircases.

Relationship between large subject matter areas

Machines for cleaning floors, carpets, furniture, walls or wall coverings are classified in A47L 11/00. In the vacuum cleaners of A47L 5/00, A47L 7/00, A47L 9/00, the main cleaning action is carried out by the provision of vacuum. If the machine has provisions for supplying cleaning fluid to the surface, it generally falls under A47L 11/00. Likewise, if the machine is not a conventional domestic vacuum cleaner, but a machine of bigger size dislodging the dirt with the aid of large brushes and subsequently sucking the dislodged dust and dirt, it is classified as a sweeping machine in the relevant groups under A47L 11/22, A47L 11/24 and A47L 11/40.

References relevant to classification in this group
This subclass/group does not cover:
Suction cleaner with liquid supply
Informative references
Attention is drawn to the following places, which may be of interest for search:
Brushes
Non-Positive-Displacement Pumps (fans, blowers)
Dynamo-electric machines
Special rules of classification within this group

It is highly desirable to add the Indexing Code A47L 2201/00 to identify "robotic" aspects (see A47L 2201/00 FCR for further details) of the suction cleaners covered by this main group.

Suction cleaners adapted for additional purposes (suction devices for removing ash F23J 1/02) ; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids
Definition statement
This subclass/group covers:

Special type suction cleaners.

Furniture pieces with suction opening for domestic use.

Suction cleaners adapted to take up liquid, e.g. suction cleaners of the wet/dry type.

Using the exhaust air for other purposes, e.g. distribution of chemicals/deodorant

For supporting the suction cleaner on the exhaust air, e.g. all suction cleaners floating on their respective exhaust air, most without wheels.

Relationship between large subject matter areas

Machines for cleaning floors, carpets, furniture, walls or wall coverings are classified in A47L 11/00. In the vacuum cleaners of A47L 5/00, A47L 7/00, A47L 9/00, the main cleaning action is carried out by the provision of vacuum. If the machine has provisions for supplying cleaning fluid to the surface, it generally falls under A47L 11/00. Likewise, if the machine is not a conventional domestic vacuum cleaner, but a machine of bigger size dislodging the dirt with the aid of large brushes and subsequently sucking the dislodged dust and dirt, it is classified as a sweeping machine in the relevant groups under A47L 11/22, A47L 11/24 and A47L 11/40.

References relevant to classification in this group
This subclass/group does not cover:
Suction devices for removing ash
F23J/02
Floor-scrubbing machines taking-up dirty liquid by suction
Floor polishing tools
Informative references
Attention is drawn to the following places, which may be of interest for search:
Suction cleaner adapted to take up liquids of the bucket type
Lawn Mowers supported by an air cushion
Devices for removing chips for machine tools
Special rules of classification within this group

It is highly desirable to add the Indexing Code A47L 2201/00 to identify "robotic" aspects (see A47L 2201/00 FCR for further details) of the suction cleaners covered by this main group.

Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
Definition statement
This subclass/group covers:

Details of suction cleaners.

Details of parts, elements of the suction cleaner such as those related to the hose, nozzle or casing of the vacuum cleaner.

Accessories of suction cleaners.

Elements which are not integral part of the suction cleaner itself, but which can be used in combination with it. Examples: exchangeable nozzles or brushes, extension wands, etc.

Storing devices.

Those for storing the whole suction cleaner or elements of it. They can be elements external to the suction cleaner or elements integrated in the suction cleaner.

Carrying vehicles.

This includes any means facilitating, contributing to or making possible the displacement of the whole suction cleaner or a part of it (e.g. its nozzle), regardless of whether the means is integrated (e.g. wheels) or not in the suction cleaner.

This also includes means for avoiding mechanical obstacles, such as control means, as well as bumpers in the casing of the suction cleaner.

Relationship between large subject matter areas

Machines for cleaning floors, carpets, furniture, walls or wall coverings are classified in A47L 11/00. The vacuum cleaners in A47L 9/00 may be able to take-up liquid by vacuum, but they do not generally add cleaning liquid. If the machine has provisions for supplying cleaning fluid to the surface, it generally falls under A47L 11/00. Likewise, if the machine is not a conventional domestic vacuum cleaner, but a machine of bigger size dislodging the dirt with the aid of large brushes and subsequently sucking the dislodged dust and dirt, it is classified as a sweeping machine in the relevant groups under A47L 11/22, A47L 11/24 and A47L 11/40.

If the detail is somehow related to the kind of vacuum cleaner, the relevant subgroup of A47L 5/00 should also be given.

References relevant to classification in this group
This subclass/group does not cover:
Making dust bags
B31B41/00F
Informative references
Attention is drawn to the following places, which may be of interest for search:
Machines for cleaning floors in combination with vacuum cleaners. Including suction cleaner accessories such as suction cleaner nozzles with fluid delivery means.
Apparatus using free vortex flow, e.g. cyclones
Nozzles in general
Shaping or joining of plastics
Protecting against, or damping of, acoustic waves, e.g. sound
Special rules of classification within this group

It is highly desirable to add the Indexing Code A47L 2201/00 to identify "robotic" aspects (see A47L 2201/00 FCR for further details) of the suction cleaners covered by this main group.

Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Agitator, beater
element striking the surface to be cleaned for dislodging dirt from it
Blower, fan, turbine
element provided with blades and rotating for generation of an underpressure
Dry filter
filter separating small particles contained in air flowing through it and which is not shaped as a bag
Suction mouth, suction head
vacuum cleaner nozzle
Synonyms and Keywords

In patent documents the following abbreviations are often used:

Autonomous cleaner
robotic cleaner
Universal joint
cardan joint
Machines for cleaning floors, carpets, furniture, walls, or wall coverings
Definition statement
This subclass/group covers:

Floor surfacing or polishing machines. (A47L 11/02 - A47L 11/20)

In this group polishing (burnishing, buffering, waxing) : to provide a glossy, reflective surface. Can be aided with polishing agents or waxes.

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Floor-sweeping machines. (A47L 11/22 - A47L 11/24)

In this group sweeping is defined as a dry (in contrast to scrubbing) operation involving removing dust, debris and larger particles from a floor such as brushing, vacuuming or blowing - i.e. to loose particles.

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Floor-scrubbing machines (A47L 11/26 - A47L 11/307)

In this group scrubbing (scouring): wet operation involving application of water/cleaning composition together with mechanical action on the floor surface with mops, rotating pads or brushes or other cleaning tools.

It may involve recovery of the dirty liquid or not.

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Carpet-sweepers. (A47L 11/32 - A47L 11/33)

In this group a carpet sweeper in the sense of A47L 11/32 and subgroups is defined as a mechanical device for the cleaning of carpets that typically consists of a small box, the base of the box having rollers and brushes, connected by a belt or gears. There may also be a container for dirt.

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Machines for treating carpets in position by liquid, foam, or vapour, e.g. by steam. (A47L 11/34)

These machines are intended for powerful carpet extraction - i.e. for removing deep, embedded soils in carpets laying on the floor (also called carpet extractors).

Higher pressure steam, cleaning fluid and/or shampoo is applied to the carpet. Scrubbing action may be used (brushes, etc...).

Dirty liquid is normally - not always - recovered by the machine.

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Machines for beating upholstery (A47L 11/36).

Machines, specially adapted for cleaning walls, ceilings, roofs, or the like (A47L 11/38).

Parts or details of the machines, e.g. handles, arrangement of switches, skirts,... (A47L 11/40 - A47L 11/4097).

Relationship between large subject matter areas

Group A47L 13/00 covers implements for cleaning floors, carpets, furniture, walls or wall coverings. Hence implements for such a use are classified in A47L 13/00 and the present group (A47L 11/00) covers the machines for that use. The carpet-sweepers can be considered as one example of limit case between machine and implement. Here they are still considered as machines and classified under A47L 11/32 and subgroups. Other limit case are the steam mops, which are in contrast considered as implements and classified under A47L 13/225.

Conventional domestic suction cleaners are classified in A47L 5/00; A47L 7/00; A47L 9/00 and not under A47L 11/00. In the vacuum cleaners of A47L 5/00; A47L 7/00; A47L 9/00 the main cleaning action is carried out by the provision of vacuum. If the machine has provisions for supplying cleaning fluid to the surface, it generally falls under A47L 11/00. Likewise, if the machine is not a conventional domestic vacuum cleaner, but a machine of bigger size dislodging the dirt with the aid of large brushes and subsequently sucking the dislodged dust and dirt, it is classified as a sweeping machine in the relevant groups under A47L 11/22 - A47L 11/24 and A47L 11/40.

References relevant to classification in this group
This subclass/group does not cover:
Floor, walls, ceilings sanding or grinding machines
Vacuum-cleaners
Informative references
Attention is drawn to the following places, which may be of interest for search:
Mechanical or pressure cleaning of carpets not in position.
Arrangements for removing of previously fixed floor coverings
Dispensing, delivering or transferring liquids not otherwise provided for.
Steam generation per-se.
Special rules of classification within this group

It is highly desirable to add the Indexing Code A47L 2201/00 to identify "robotic" aspects (see A47L 2201/00 for further details) of the machines covered by this main group.

Synonyms and Keywords

In patent documents the following abbreviations are often used:

Disc brush; roll brush
In the group definitions of A47L 11/02 to A47L 11/38 disc brush and roll brush mean any disc shaped or roll shaped floor engaging tool (brush, pad, ...), and is not restricted to brushes per-se made of bristles.
Implements for cleaning floors, carpets, furniture, walls, or wall coverings (brushes, their handles or fastenings A46B, B25G; scrapers for finishing work on buildings E04F 21/00)
Definition statement
This subclass/group covers:

Scraping implements such as steel wool, wire meshes...

Scrubbing implements such as wipes, sponges, cloths, mops...

Scouring implements including scouring implements for hearths or metal objects.

Polishing implements as well as squeegees, carpet beaters, dusters and other implements for cleaning floors, carpets, furniture, walls or wall coverings in the domestic ambit.

Manual operation of the user is required to perform the cleaning action.

Auxiliary devices related to said implements are classified here too (storing devices, shakers for dust-cloths, dust pans, crumb trays, wringers, kneeling supports for cleaning floors...).

Relationship between large subject matter areas

Group A47L 11/00 covers machines for cleaning floors, carpets, furniture, walls or wall coverings. Hence machines for such a use are classified in A47L 11/00.

and the present group (A47L 13/00) covers the implements for that use. The carpet-sweepers can be considered as one example of limit case between machine and implement. Here they are still considered as machines and classified under A47L 11/32 and subgroups. Other limit case are the steam mops, which are in contrast considered as implements and classified under A47L 13/225.

A47L 1/00 and A47L 4/00 cover machines or implements for cleaning windows, window shades, window screens and venetian blinds. Implements which can be used for cleaning windows, window shades, window screens or venetian blinds as well as floors, carpets, furniture, walls or wall coverings are classified under A47L 13/00.

References relevant to classification in this group
This subclass/group does not cover:
Brooms
Dusting implements using adhesive surfaces
Implements used in manual washing or polishing of crockery, table-ware or the like
Informative references
Attention is drawn to the following places, which may be of interest for search:
Sanitary equipment not otherwise provided for; toilet accessories
Hand propelled vehicles e.g. hand-carts
Layered products
Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body
Washing or rinsing machines for crockery or tableware
Definition statement
This subclass/group covers:

Features of washing or rinsing machines for crockery or tableware, i.e. machines which are suitable for washing or rinsing articles such as dishes, plates, knives, forks, spoons, glasses, cups, etc., used at meals or in the kitchen, e.g. for cooking.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Cleaning, e.g. washing, meat or sausages
Machines for cleaning, blanching, drying or roasting fruits or vegetables, e.g. coffee, cocoa, nuts
Devices for washing vegetables or the like
Cleaning devices specially adapted for surgical instruments
Cleaning devices for bed-pans, urinals or other sanitary devices for bed-ridden persons
Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs
Apparatus for cleaning or rinsing laboratory receptacles or instruments
B01L99/00D
Cleaning in general
Laundry washing machines
Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Dishwashing machine
a machine for washing dishes, plates and like tableware, cutlery, cooking vessels and utensils.
{ Washing processes, i.e. machine working principles characterised by phases or operational steps}
Definition statement
This subclass/group covers:

Washing methods or processes, i.e. machine working principles or operational steps.

In the field of washing machine for crockery and/or tableware there exists a clear distinction between washing methods and washing processes.

A washing method defines the washing principle according to which a machine works: by utilising water, ultrasonic wave, microwaves, steam, etc.

A washing process defines the series of operations performed by a machine to wash the tableware according to a defined washing principle.

For example, a conventional domestic dishwasher uses water for washing the crockery and the washing processes of domestic dishwashers usually comprise the series of operations of: rinsing with cold water, washing with water containing detergent and rinsing with hot water.

This distinction between washing methods and washing processes is not always used in documents in the field of dishwashers.

However, a clear indication that a dishwasher application relates to a washing method and/or process, is given by the subject-matter of the application, which must relate to the way the crockery or the tableware is treated.

Does the invention information of the application concern the principle according to which the dishes are treated? Is steam applied to the crockery? Are microwaves used for drying the tableware? Then there is a clear indication that the technical information of the application relates to a washing method.

Does the invention information concern the temporal sequence of the machine operational steps affecting the washing cycle of the dishes? Pre-rinse, washing, final rinse and drying? Does the invention information concern the values of the washing parameters affecting the crockery? What will be the value of the water temperature during the rinsing step? What will be the value of the air temperature during the drying step? Then there is a clear indication that the application relates to a washing process.

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Special cleaning and washing methods
Special rules of classification within this group

Documents related to washing method and/or processes are classified by allocating A47L 15/0002 and its subgroups at inventive information level as well as the orthogonal Indexing Code A47L 2601/00.

The following special classification rules must be observed in order to reflect the distinction between washing methods and washing processes so as to render the retrieval of the relevant state of the art easier.

If the invention information of an application concerns a washing method, which is characterized by the use of a particular washing principle or treatment on the crockery or tableware, the classification at inventive level A47L 15/0002 must be assigned to the application and in addition the orthogonal Indexing Code A47L 2601/00 corresponding to this particular treatment must also be assigned.

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The classification approach CPC symbol and orthogonal indexing codes provides a multi-parametric search strategy.

Example of classification 1:

The application relates to a washing method characterized by the application of steam to the dishes. In addition to the classification at inventive level A47L 15/0002 the Indexing Code A47L 2601/04 must further be assigned to this application.

If the invention information of an application concerns a washing process, characterized by one or more particular operational steps or washing phases of the machine, one or more subgroups of the A47L 15/0002 corresponding to the one or more particular washing steps or phases must be assigned to the application. An orthogonal Indexing Code A47L 2601/00 corresponding to the corresponding washing method must further be assigned to the application.

If the washing process does not refer to any particular operational step of the machine, then the higher subgroup A47L 15/0002 is to be assigned.

Example of classification 2:

The application relates to a washing process characterized by the implementation of a plurality of intermediate rinsing phases. The dishwasher uses pressurized cleaning liquid delivered by a pump. The classification A47L 15/0005 (rinsing phases) at inventive level and the Indexing Code A47L 2601/02 (crockery treated with pressurized water) must be assigned to this application.

If a washing method and/or process is specially adapted/used for a particular type of dishwasher, in addition to the classification symbols for the washing method and/or process the Classification at inventive level or the Indexing Code (depending whether invention information or additional information are to classify) corresponding to the particular dishwasher type should be assigned.

Example of classification 3:

The subject of the patent application is a washing process, wherein a better drying of the crockery is achieved. The process is used in a conveyor-type dishwasher and uses microwaves to dry the dishes. No invention information concerning the conveyor-type dishwasher and the drying arrangement is given.

The searcher can easily retrieve the relevant state of the art by combining the classification A47L 15/0013 at inventive level (machine operational step => drying phase) with the corresponding Indexing Codes A47L 2601/12 (washing method characterized by the use of => microwaves) and A47L 15/241 (additional information which identifies the implementation of the washing process in a conveyor-type dishwasher).

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{ Rinsing phases, e.g. pre-rinsing, intermediate rinsing, final rinsing}
Definition statement
This subclass/group covers:

Applications characterized by temporal sequence of rinsing operations and/or rinsing parameters (e.g. water temperature, pressure) affecting the crockery during a rinsing phase.

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Special rules of classification within this group

The Indexing Code corresponding to the particular treatment on the crockery must also be assigned.

For example, if the crockery is treated with pressurized water the Indexing Code A47L 2601/02 must further be assigned to the application.

{ Washing phases}
Definition statement
This subclass/group covers:

Applications characterized by temporal sequence of washing operations and/or washing parameters (e.g. water temperature, pressure) affecting the crockery during a washing phase.

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Special rules of classification within this group

The Indexing Code corresponding to the particular treatment on the crockery must also be assigned.

For example, if the crockery is treated with pressurized water the Indexing Code A47L 2601/02 must further be assigned to the application.

{ Drain phases, including initial, intermediate or partial draining phases}
Definition statement
This subclass/group covers:

Applications characterized by temporal sequence of draining operations and/or draining parameters (e.g. partial draining) during a washing cycle.

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Special rules of classification within this group

The Indexing Code corresponding to the particular treatment on the crockery must also be assigned.

For example, if the crockery is treated with pressurized water the Indexing Code A47L 2601/02 must further be assigned to the application.

{ Drying phases, including dripping-off phases}
Definition statement
This subclass/group covers:

Applications characterized by temporal sequence of drying operations and/or drying parameters (e.g. temperature of air) affecting the crockery during a drying phase.

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Special rules of classification within this group

The Indexing Code corresponding to the particular treatment on the crockery must also be assigned.

For example, if the crockery is treated with pressurized water the Indexing Code A47L 2601/02 must further be assigned to the application.

{ other treatment phases, e.g. steam or sterilizing phase}
Definition statement
This subclass/group covers:

Applications characterized by temporal sequence and/or parameters of other particular treatments affecting the crockery during a washing cycle.

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Laundry washing machines, apparatus, or methods not otherwise provided for
Special rules of classification within this group

The Indexing Code corresponding to the particular treatment on the crockery must also be assigned.

For example, if the crockery is treated with steam the Indexing Code A47L 2601/04 must further be assigned to the application.

{ Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control (for control of water softening or water softener regeneration A47L 15/4229; for control of water level A47L 15/4244; for control of bad smells or odours A47L 15/4276; for control of water temperature A47L 15/4287; for control of water pressure A47L 15/4289; for control of condition of crockery or tableware A47L 15/4295; for control of condition of washing water A47L 15/4297) }
Definition statement
This subclass/group covers:

Controlling method relating to the command of the machine, i.e. the control of any kind of operation of the machine. In the controlling methods information (manual or automatic inputs) is used by controlling means (e.g. a processor) to command actuators (e.g. valves, pump's motors, heating means, etc.)

A controlling method may have different purposes, for example: the control of a washing phase of a washing process (e.g. the control of the drying phase); the prevention of the malfunction of the machine; the control of a component of the machine (e.g. the detergent dispenser, the circulation pump, etc.).

The following picture schematically illustrates the workflow of a controlling method: Information (manual settings or automatic detections from e.g. sensors) is inputted into the controlling means which, depending on the purpose of the controlling, sends command signals to the dishwasher components.

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Relationship between large subject matter areas

The controlling devices per se (hardware) are classified in the A47L 15/46 subgroup.

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A47L 15/0018 (Controlling processes) vs. A47L 15/42 (Details)

When it has been decided to create the current classification scheme for the controlling method, it has been noted that some of the “purpose of the control” entries, i.e. some of the A47L 15/0018 subgroups, could have been a repetition of some of the “details” entries, i.e. some of the A47L 15/42 subgroups.

In fact, some measuring or regulating arrangements hystorically classified according the A47L 15/42 subgroups may implicitly or explicitly disclose controlling processes. For example, a spray-pressure measuring or regulating arrangement (ref. A47L 15/4289) may also disclose a controlling process having as purpose or target of the controlling the control of the water pressure during the operation of a dishwasher.

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For such situations, to avoid unuseful duplication of classes, it has been decided, when applicable, to use the entries already existing under the A47L 15/42 subgroups to also classify purposes or targets of the controlling processes.

The orthogonal indexing codes for the controlling methods may additionally be given if useful.

Example of classification 1 - A47L 15/4297 vs. A47L 15/0031

An application relates to an arrangement for controlling the condition of the washing water in a dishwasher.

Variation of optical parameters are detected by an optical arrangement and a corresponding turbidity value of the washing water is determined and sent to a controlling device of the dishwasher.

This first aspect of the application should be classified as follow:

purpose of the controlling: condition of the washing water => A47L 15/4297

automatic detection inputted into the controlling device: variation of optical quantity => A47L 2401/30

action performed by the controlling device: indication of the turbidity value => A47L 2501/26

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The application further discloses that based on the result of the turbidity measurement (ref. "first" controlling process in the figure above), the controlling device commands the execution of an intermediate washing water discharge phase during a washing cycle.

This second aspect of the application should be classified as follow:

purpose of the controlling: controlling of washing water discharge phases => A47L 15/0031

automatic detection inputted into the controlling device: turbidity of washing water => A47L 2401/10

action performed by the controlling device: discharge of washing water => A47L 2501/02

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Example of classification 2 - A47L 15/4295 vs. A47L 15/0034

An application relates to an arrangement for detecting or measuring the condition of the crockery loaded in the dishwasher per se. The purpose of the controlling method is exclusively to detect the nature or the quantity of the crockery. Only the classification at inventive level A47L 15/4295 should be assigned to the application in-suit.

Should the detection or the measurement of the condition of the crockery loaded in the dishwasher be used to control other components or washing parameters of the machine, then this detection or measurement represents the input of the controlling method and to assign only the A47L 15/4295 class may not be correct (see below).

An application relates to a controlling method to optimize the drying phase of a washing cycle. The controlling method utilizes the information provided by an arrangement to measure the quantity of the crockery loaded in the dishwasher to regulate an air heater accordingly.

This application should be classified as follow:

purpose of the controlling: optimization of the drying phase => A47L 15/0034

automatic detection inputted into the controlling device: quantity of the crockery => A47L 2401/04

component controlled by the controlling device: air heater => A47L 2501/11

Should this application also contain relevant information concerning the arrangement to measure the quantity of the crockery, then, depending from the relevance of this information, the corresponding classification at inventive level A47L 15/4295 or Indexing Code A47L 15/4295 should also be assigned to the application.

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Example of classification 3 - A47L 15/4244 vs A47L 15/0023

An application relates to a water-level regulating arrangement.

It is disclosed the monitoring of a recirculation pump's parameter to measure the level of the water inside the tub and to close the water inlet valve once the desired water-level is reached.

This application should be classified as follow:

purpose of the controlling: water-level measuring or regulating arrangements => A47L 15/4244

automatic detection inputted into the controlling means: recirculation pump's parameter => A47L 2401/08

component controlled by the controlling means: water inlet valve => A47L 2501/01

Example of classification 4 - Classification of a component and a control method thereof.

Dishwashers components are mainly classified in the subgroups A47L 15/42 (details). If an application, in addition to a component, further discloses a control method thereof, only the classification at inventive level of the component must be assigned, both for the component per se and for the control method thereof. The orthogonal indexing codes for the controlling methods may additionally be given if useful.

For example, an application discloses a pump, which can be used for re-circulating and/or discharging washing liquid in a dishwasher.

The pump is controlled so as automatically to change from recirculation into drain mode if the turbidity of the washing liquid is higher than a reference value.

This application should be classified as follow:

classification at inventive level: pump and control method thereof => A47L 15/4225

automatic detection inputted into the controlling means: turbidity of washing liquid => A47L 2401/10

components controlled by the controlling means:

pump's operating mode => A47L 2501/05 and

drain valve => A47L 2501/02

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Programme-control systems
Testing or monitoring of control systems or parts thereof
Special rules of classification within this group

The purpose or target of the controlling method (what is to be controlled?) is usually (ref. par. Relationship between large subject-matter areas) classified according to the A47L 15/0018 and its subgroups.

The information inputted by a user into a controlling device (i.e. manual inputs), the information provided by e.g. sensors to the controlling device (i.e. automatic detections) and the quantities or components controlled or the actions taken by the controlling device in order to carry out the required control (i.e. output of the controlling method) are classified according to the corresponding orthogonal Indexing Codes:

A47L 2301/00 - Manual input;

A47L 2401/00 - Automatic detections;

A47L 2501/00 - Output of the controlling method.

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The classification approach CPC symbol and orthogonal indexing codes provides a multi-parametric search strategy.

Example of classification 1:

An application relates to a controlling method of a dishwasher, which allows the reduction of the amount of energy used by the machine. The method uses the information given by a water temperature sensor for switching on/off a water-heater.

This application should be classified as follow:

purpose of the controlling: energy saving => A47L 15/0047

automatic detection inputted into the controlling device: water temperature => A47L 2401/12

component controlled by the controlling device: water heater => A47L 2501/06

Example of classification 2:

An application relates to a controlling method to optimize the drying phase of a washing cycle.

The controlling method utilizes the information provided by an arrangement to measure the air humidity in the dishwasher to regulate an air heater and an air blower accordingly.

No information about the controlling device (e.g. CPU) is given.

This application should be classified as follow:

purpose of the controlling: optimization of the drying phase => A47L 15/0034

automatic detection inputted into the controlling device: air humidity => A47L 2401/12

components controlled by the controlling device:

air heater => A47L 2501/11

air blower => A47L 2501/12

Should this application also contain relevant information concerning the condensing arrangement, then, depending from the relevance of this information, the corresponding classification at inventive level A47L 15/483 or indexing code A47L 15/483 should also be assigned to the application.

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The searcher can easily retrieve the relevant state of the art by combining the classification at inventive level with the corresponding Indexing Codes.

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{ Regulation of operational steps within the washing processes, e.g. optimisation or improvement of operational steps depending from the detergent nature or from the condition of the crockery}
Definition statement
This subclass/group covers:

Controlling methods of the dishwashers operational steps. In other words, the control of the operation of the machine during a particular phase of the washing process.

References relevant to classification in this group
This subclass/group does not cover:
Washing methods or processes
{ Water filling (A47L 15/4244 takes precedence) }
Definition statement
This subclass/group covers:

Controlling methods of any water filling phase in a dishwasher.

In other words, the purpose of the controlling method is to control the amount of water to let into the dishwasher and/or the length (time duration) of the water filling phase.

The main focus of the control is the particular operational step of the machine, i.e. the filling phase.

Such controlling methods may, for example, involve the monitoring of the water level in the dishwasher's tub to decide on when to terminate the water filling phase.

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Other methods may, for example, involve the steps of operating a recirculation pump during the filling phase and monitoring the behaviour of the pump's electrical parameters in order to decide when to close the water inlet valve.

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Relationship between large subject matter areas

A47L 15/0023 (Control of water filling) vs. A47L 15/4244 (Water-level measuring or regulating arrangements)

If the purpose of the control is to measure or regulate the water level in the tub (or any other container) of the dishwasher, i.e. the main focus of the application is the control of the water level per se, the subgroup A47L 15/4244 (Water-level measuring or regulating arrangements) takes precedence.

In other words, attention must be paid to the "role "of the water-level measurement.

Is the water-level monitored to decide on the termination of the water filling phase? Then the water-level measurement is the input of the water filling controlling method. This "role" of the water-level measurement must be identified by the corresponding Indexing Code A47L 2401/09 and the application must be classified in the A47L 15/0023 subgroup.

If, on the contrary, the application concerns the water-level measure or regulation per se, then the application must be classified in the A47L 15/4244 subgroup.

Example of classification 1

An application relates to a controlling method to regulate the water-level in the tub of a dishwasher.

The method is based on the fact that the electrical current absorbed by a recirculation pump's motor is correlated to the level of water in the tub.

The main focus of the application is the control of the water-level per se.

This application should be classified as follow:

purpose of the controlling: measuring of the water-level in the tub => A47L 15/4244

automatic detection inputted into the controlling device: current absorbed by the pump's motor => A47L 2401/08

component controlled by the controlling device: water inlet valve => A47L 2501/01

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Example of classification 2

An application relates to a controlling process to regulate the amount of water to let into a dishwasher’s tub during a water filling phase.

The controlling process discloses operating a recirculation pump during the filling phase and monitoring the behaviour of the pump's electrical parameters in order to decide when to close the water inlet valve.

The main focus of the control is the particular operational step of the machine, i.e. the filling phase.

This application should be classified as follow:

purpose of the controlling: Water filling phase => A47L 15/0023

information inputted into the controlling device:

water level in the dishwasher's tub => A47L 2401/09 and

current absorbed by the pump's motor => A47L 2401/08

component controlled by the controlling device: water inlet valve => A47L 2501/01

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{ Rinsing phases}
Definition statement
This subclass/group covers:

Controlling of any rinsing phase in a dishwasher.

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{ Washing phases}
Definition statement
This subclass/group covers:

Controlling of washing phases in a dishwasher.

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{ Water discharge phases}
Definition statement
This subclass/group covers:

Controlling of any water discharge phase in a dishwasher.

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{ Drying phases, including dripping-off phases}
Definition statement
This subclass/group covers:

Controlling of any water drying phase in a dishwasher.

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Control of humidity
Automatic switching arrangements for electric heating apparatus
{ Steam or sterilizing phases}
Definition statement
This subclass/group covers:

Controlling of steam phases in a dishwasher.

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Controlling of any type of sterilization phase(s) in a dishwasher (e.g. by using UV).

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{ Filter cleaning phases}
Definition statement
This subclass/group covers:

Control of the filter cleaning phases, i.e. in a washing cycle the control of the phase dedicated to the cleaning of the filter (e.g. executing a filter cleaning during a drying phase of a washing cycle).

References relevant to classification in this group
This subclass/group does not cover:
Arrangements for cleaning of filters and control method therefor
{ Desorption phases of reversibly dehydrogenated drying material. e.g. zeolite in a sorption drying system}
Definition statement
This subclass/group covers:

Controlling of regeneration phases of reversibly dehydrogenated drying materials like zeolite.

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{ Operation time reduction}
Definition statement
This subclass/group covers:

Controlling methods for reducing the operation time of a dishwasher.

{ Energy or water consumption, e.g. by saving energy or water}
Definition statement
This subclass/group covers:

Controlling methods for reducing the energy or water consumption of a dishwasher.

{ Detection or prevention of malfunction, including accident prevention (arrangements to prevent clogging of filters A47L 15/4208; safety arrangements for preventing water damage A47L 15/421) }
Definition statement
This subclass/group covers:

This subgroup may also include controlling methods for adjusting operational parameters of the dishwashing based on the user satisfaction.

References relevant to classification in this group
This subclass/group does not cover:
Safety arrangements for preventing water damage
Informative references
Attention is drawn to the following places, which may be of interest for search:
Controlling method concerning the control of the clogging of the filters in order to start a self-cleaning phase
Special rules of classification within this group

If the purpose of the controlling method is to detect the malfunction of a dishwasher component, the classification at inventive level or the Indexing Code (depending whether invention information or additional information are to classify) corresponding to this component should be assigned.

Example of classification 1:

The subject-matter of an application is a controlling method to detect malfunction of a drying device using an absorbent material like zeolite. The technical features of the drying device are not important per se.

The purpose of the controlling method is the detection of malfunction of a dishwasher component and therefore the classification at inventive level A47L 15/0049 should be assigned to the application.

The dishwasher component to be monitored is the drying device using zeolite. This additional information is useful for a searcher because it constitutes a pointer to the component, which is under surveillance. Consequently, the Indexing Code A47L 15/481 should also be assigned to this application.

A searcher can easily retrieve the relevant state of the art in this technical field by combining A47L 15/0049 and Indexing Code A47L 15/481.

Example of classification 2:

The subject-matter of an application is a controlling method to detect malfunction of a washing pump. The technical features of the pump are not important per se.

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The purpose of the controlling method is the detection of malfunction of a dishwasher component and therefore the classification at inventive level A47L 15/0049 should be assigned to the application.

The dishwasher component to be monitored is the washing pump. This additional information is useful for a searcher because it constitutes a pointer to the component, which is under surveillance. Consequently, the Indexing Code A47L 15/4225 should also be assigned to this application.

A searcher can easily retrieve the relevant state of the art in this technical field by combining A47L 15/0049 and Indexing Code A47L 15/4225.

{ Noise reduction}
Definition statement
This subclass/group covers:

Controlling methods to detect and/or prevent and/or reduce noise during operation of a dishwasher.

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{ Metering or indication of used products, e.g. type or quantity of detergent, rinse aid or salt; for measuring or controlling the product concentration}
Definition statement
This subclass/group covers:

Controlling methods related to consumable products.

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Arrangements for measuring the detergent concentration in laundry washing machines
Control of chemical or physical-chemical variables, e.g. pH value
{ Cleaning of machines parts, e.g. removal of deposits like lime scale or proteins from piping or tub}
Definition statement
This subclass/group covers:

Controlling methods involving cleaning of dishwashers parts.

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References relevant to classification in this group
This subclass/group does not cover:
Arrangements for cleaning of filters and control method therefor
Informative references
Attention is drawn to the following places, which may be of interest for search:
Methods for disinfecting the tub or the drum of laundry washing machines
{ using wireless communication between internal components of the machine}
Definition statement
This subclass/group covers:

Controlling methods involving wireless communications between internal components of a dishwasher

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{ using remote monitoring or controlling of the dishwasher operation, e.g. networking systems}
Definition statement
This subclass/group covers:

Controlling methods involving a remote control of a dishwasher.

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{specially adapted for drinking glasses}
Definition statement
This subclass/group covers:

Machines for cleaning drinking vessels, such as glasses and beer mugs.

{with brushes or similar scraping members}
Definition statement
This subclass/group covers:

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{the glasses being placed on conveyers}
Definition statement
This subclass/group covers:

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{of the rotary table type}
Definition statement
This subclass/group covers:

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{ of non-domestic use type, e.g. commercial dishwashers for bars, hotels, restaurants, canteens or hospitals (machines specially adapted for drinking glasses A47L 15/0065; drawer-type dishwashers A47L 15/0084; in-sink dishwashers A47L 15/0086; miniature dishwashers A47L 15/0089; conveyer-type dishwashers A47L 15/24; machines with crockery cleaned by brushes A47L 15/37) }
Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Commercial dishwasher, domestic dishwasher
Domestic and commercial dishwashers differ substantially in design and manner of use, with the possible exception of a few commercial machine styles which are an outgrowth of domestic unit designs. Even though these latter designs may appear similar in many respects, they differ in function and operation, not only in the length of time it takes to wash and rinse a rack of ware, but also in the number of washes and rinses per rack.Domestic units ordinarily have the further capability of drying washed dishes within the wash chamber, whereas comparable commercial units may feature air drying outside the chamber in order to minimize the time it takes to complete each rack of ware. It is important in a commercial environment to wash racks successively in rapid order. Thus, a commercial washer may be used for washing and rinsing but not for drying, if the length of time it takes for the latter is too much.
{ with a plurality of fluid recirculation arrangements, e.g. with separated washing liquid and rinsing liquid recirculation circuits}
Definition statement
This subclass/group covers:

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Hood-type dishwashers, often comprising separated washing liquid and rinsing liquid circuits.
{ with vertical sliding closing doors, e.g. hood-type dishwashers}
Definition statement
This subclass/group covers:

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Door, lid body (Japanese FI class)
A47L15/42&B
Vertical sliding unit (Japanese F-term)
3B082/BB05
Synonyms and Keywords
English
Hood-type dishwasher
German
Haubengeschirrspülmaschine
French
Lave-vaisselle type capot
{ of drawer-type}
Definition statement
This subclass/group covers:

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{ In-sink dishwashers}
Definition statement
This subclass/group covers:

Dishwashers mounted in an aperture provided in a kitchen work surface and/or table.

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

In patent documents the following expressions/words "in-sink dishwashers" and "inset dishwashers" are often used as synonyms.

{ of small size, e.g. portable mini dishwashers for small kitchens, office kitchens, boats, recreational vehicles (specially adapted for drinking glasses A47L 15/0065) }
Definition statement
This subclass/group covers:

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Special rules of classification within this group

If the miniature dishwasher can be used for washing glasses, then also assign the class A47L 15/0065 or one of the subclasses.

{ specially adapted to wash large items like pots, trays, baking trays, cooking grids}
Definition statement
This subclass/group covers:

Washing machines specially adapted to wash items of cumbersome dimensions like serving trays, barbecue-grilles, or similar items which usually do not fit into ordinary dishwashers.

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{ cleaning with abrasive solid particles, e.g. by blasting the crockery with liquid containing granules}
Definition statement
This subclass/group covers:

Dishwashers in which small, hard particles, such as specially designed plastic granules, are mixed with water and detergent to achieve a cleaning mixture that is sprayed under e.g. high pressure against articles to be washed.

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{ Combination of dishwashers with other household appliances}
Definition statement
This subclass/group covers:

Multifunctional appliances which may perform dishwashing operations.

The applicances can be machines having a plurality of operating units (e.g. dishwasher and oven), which share part of the functional volumes thereof within a single housing cabinet:

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and can also be convertable appliances, e.g. dishwashers that can be converted into laundry washing machine and vice versa:

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References relevant to classification in this group
This subclass/group does not cover:
Combination of two dishwashers in a common frame
Informative references
Attention is drawn to the following places, which may be of interest for search:
Combinations of laundry washing machines with other separate apparatus in a common frame or the like
by reciprocating movement of the cleaning chamber
Definition statement
This subclass/group covers:

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by means of an impeller in the chamber
Definition statement
This subclass/group covers:

Dishwashers in which the crockery or tableware to be cleaned is positioned in a stationary basket, which is typically immersed in a liquid medium subjected to agitation by means of an impeller located in the cleaning chamber.

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by application of a pressure effect produced by pumps
Definition statement
This subclass/group covers:

Dishwashers in which the crockery or tableware to be cleaned is positioned in a stationary basket, which is typically immersed in a liquid medium subjected to circulation around and between the dishes by means of a pump.

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by introducing compressed air or other gas into the liquid
Definition statement
This subclass/group covers:

Dishwashers usually comprising a vessel filled with water to a predetermined level and a compressed air arrangement by means of which air is introduced into the washing chamber. As the air enters the washing chamber it forms bubbles which flow across the articles and turbulate the water within the chamber.

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by a boiling effect
Definition statement
This subclass/group covers:

Dishwashers usually comprising a vessel filled with water to a predetermined level and heating means to heat the water up to the boiling point.

Alternatively the water can be heated in a separated boiler and once the water is boiling, the water is discharged over the dishes.

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using sonic or ultrasonic waves
Definition statement
This subclass/group covers:

Dishwashers having sonic or ultrasonic generators connected to the water bath of a cleaning chamber.

In such dishwashers using for example ultrasonic generators, a high frequency sound wave is radiated by a generator through the water bath. This rapidly alternating wave produces a sequence of localized positive and negative pressure regions. The negative pressure regions effectively separate or cavitate the water bath to produce a large quantity of minute bubbles. As these cavitation bubbles within the water bath are contacted against a surface of a crockery item to be cleaned, the bubbles implode and thus provide a substantial mechanical scrubbing action which can be effective in dislodging and removing debris from the submerged crockery item.

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References relevant to classification in this group
This subclass/group does not cover:
Methods for cleaning crockery using sonic or ultrasonic waves
Dish washers specially adapted for drinking glasses using sonic or ultrasonic waves
Dish washers of non-domestic use type using sonic or ultrasonic waves
Dish washers of the drawer-type using sonic or ultrasonic waves
In-sink dishwashers using sonic or ultrasonic waves
Dish washers of small size, e.g. portable mini dishwashers for small kitchens, using sonic or ultrasonic waves
Dish washers specially adapted to wash large items like pots, using sonic or ultrasonic waves
Dish washers specially adapted to wash large items like pots, using sonic or ultrasonic waves
Dish washers with stationary crockery baskets and spraying devices within the cleaning chamber, using sonic or ultrasonic waves
Dish washers with movement of the crockery baskets by conveyers using sonic or ultrasonic waves
Dish washers with movement of the crockery baskets by other means, using sonic or ultrasonic waves
Dish washers with crockery cleaned by brushes using sonic or ultrasonic waves
Special rules of classification within this group

The Indexing Code A47L 2601/17 must be assigned to all the applications related to the treating of crockery with sonic or ultrasonic waves.

with stationary crockery baskets and spraying devices within the cleaning chamber { (for drinking glasses A47L 15/0065) }
Definition statement
This subclass/group covers:

Dishwashers of domestic use type only, i.e. the type commonly found in home use.

Details of spraying devices per se, i.e. independently from the machine type, are also classified according to the subgroups A47L 15/16, A47L 15/18 and its subgroups.

References relevant to classification in this group
This subclass/group does not cover:
Dishwashers specially adapted for drinking glasses
Dishwashers of non-domestic use type
Drawer-type dishwashers
In-sink dishwashers
Miniature dishwasher
Dishwashers specially adapted to wash pots, trays, cooking grids
with rigidly-mounted spraying devices
Definition statement
This subclass/group covers:

In addition to dishwashers with stationary crockery baskets and rigidly-mounted spraying devices within the cleaning chamber, this subgroup also covers details of rigidly-mounted spraying devices per se arranged within a washing chamber of a dishwasher.

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References relevant to classification in this group
This subclass/group does not cover:
Details of the nozzles
Hydraulic connections of the spraying devices when attached to the racks
Special rules of classification within this group

If the spraying devices are not for a domestic-type dishwasher but for another particular type of dishwasher, in addition to the classification symbols for the spraying devices the classification at inventive level or the Indexing Code (depending whether invention information or additional information are to classify) corresponding to the particular dishwasher type should be assigned. If the arrangement comprises a controlling method, i.e. a document relates to the spraying devices and a control method thereof, in addition to the classification at inventive level the pertinent orthogonal Indexing Codes for the controlling methods (A47L 2301/00, A47L 2401/00, A47L 2501/00) may also be assigned.

with movably-mounted spraying devices
Definition statement
This subclass/group covers:

In addition to dishwashers with stationary crockery baskets and movably-mounted spraying devices within the cleaning chamber, this subgroup also covers details of movably-mounted spraying devices per se arranged within a washing chamber of a dishwasher.

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References relevant to classification in this group
This subclass/group does not cover:
Details of the nozzles
Hydraulic connections of the spraying devices when attached to the racks
Special rules of classification within this group

If the spraying devices are not for a domestic-type dishwasher but for another particular type of dishwasher, in addition to the classification symbols for the spraying devices the classification at inventive level or the Indexing Code (depending whether invention information or additional information are to classify) corresponding to the particular dishwasher type should be assigned.

If the arrangement comprises a controlling method, i.e. a document relates to the spraying devices and a control method thereof, in addition to the classification at inventive level the pertinent orthogonal Indexing Codes for the controlling methods (A47L 2301/00, A47L 2401/00, A47L 2501/00) may also be assigned.

Swingable spraying devices
Definition statement
This subclass/group covers:

In addition to dishwashers with stationary crockery baskets and swingable-mounted spraying devices within the cleaning chamber, this subgroup also covers details of swingable spraying devices per se arranged within a washing chamber of a dishwasher.

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References relevant to classification in this group
This subclass/group does not cover:
Details of the nozzles
Arrangements to modify spray pattern or direction of spray
Hydraulic connections of the spraying devices when attached to the racks
Special rules of classification within this group

If the spraying devices are not for a domestic-type dishwasher but for another particular type of dishwasher, in addition to the classification symbols for the spraying devices the classification at inventive level or the Indexing Code (depending whether invention information or additional information are to classify) corresponding to the particular dishwasher type should be assigned.

If the arrangement comprises a controlling method, i.e. a document relates to the spraying devices and a control method thereof, in addition to the classification at inventive level the pertinent orthogonal Indexing Codes for the controlling methods (A47L 2301/00, A47L 2401/00, A47L 2501/00) may also be assigned.

Rotary spraying devices
Definition statement
This subclass/group covers:

In addition to dishwashers with stationary crockery baskets and rotary-mounted spraying devices within the cleaning chamber, this subgroup also covers details of rotary spraying devices per se arranged within a washing chamber of a dishwasher.

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References relevant to classification in this group
This subclass/group does not cover:
Details of the nozzles
Hydraulic connections of the spraying devices when attached to the racks
Special rules of classification within this group

If the spraying devices are not for a domestic-type dishwasher but for another particular type of dishwasher, in addition to the classification symbols for the spraying devices the classification at inventive level or the Indexing Code (depending whether invention information or additional information are to classify) corresponding to the particular dishwasher type should be assigned. If the arrangement comprises a controlling method, i.e. a document relates to the spraying devices and a control method thereof, in addition to the classification at inventive level the pertinent orthogonal Indexing Codes for the controlling methods (A47L 2301/00, A47L 2401/00, A47L 2501/00) may also be assigned.

moved by means of the sprays
Definition statement
This subclass/group covers:

In addition to dishwashers with stationary crockery baskets and hydraulic-driven rotary-mounted spraying devices within the cleaning chamber, this subgroup also covers details (for examples hydraulic connections, sealing arrangements, materials) of hydraulic-driven rotary spraying devices per se.

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References relevant to classification in this group
This subclass/group does not cover:
Details of the nozzles
Hydraulic connections of the spraying devices when attached to the racks
Informative references
Attention is drawn to the following places, which may be of interest for search:
Sealing arrangements
Special rules of classification within this group

If the spraying devices are not for a domestic-type dishwasher but for another particular type of dishwasher, in addition to the classification symbols for the spraying devices the classification at inventive level or the Indexing Code (depending whether invention information or additional information are to classify) corresponding to the particular dishwasher type should be assigned.

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If the arrangement comprises a controlling method, i.e. a document relates to the spraying devices and a control method thereof, in addition to the classification at inventive level the pertinent orthogonal Indexing Codes for the controlling methods (A47L 2301/00, A47L 2401/00, A47L 2501/00) may also be assigned.

with movement of the crockery baskets by conveyers { (for drinking glasses A47L 15/0071) }
Definition statement
This subclass/group covers:

Dishwashers comprising one or more treating zone(s), wherein the crockery is transported through this or these zone(s) by mean of an endless conveying device (e.g. belt, chain), which extends across said zone(s) and which is loaded with the crockery to be washed.

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{the dishes moving in a horizontal plane}
Definition statement
This subclass/group covers:

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Synonyms and Keywords

In patent documents the expression "tunnel dishwashers" is often used to indicate such type of dishwashers.

{in a closed loop}
Definition statement
This subclass/group covers:

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{with conveyers of the rotary table type}
Definition statement
This subclass/group covers:

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{the dishes being placed directly on the conveyers, i.e. not in dish racks (A47L 15/242 takes precedence) }
Definition statement
This subclass/group covers:

Conveyor apparatus, wherein the dishes are placed onto the conveyor itself, the surface of the conveyor being provided with pin-like projections or recesses to hold the dishes in place during the wash.

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Synonyms and Keywords

In patent documents the expression "fly type conveyor apparatus" is often used with the meaning "a conveyor apparatus, wherein the dishes are placed onto the conveyor itself".

{the dishes moving in a vertical plane, e.g. in a closed loop}
Definition statement
This subclass/group covers:

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{ Details specific to conveyer-type machines, e.g. curtains}
Definition statement
This subclass/group covers:

Details of components specially adapted or exclusively used in conveyor-type dishwashers, which are therefore not covered by any of the A47L 15/42 subgroups.

An example of such specific details are curtains to separate the washing zones.

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References relevant to classification in this group
This subclass/group does not cover:
Baskets for conveyer-type dishwashers
Special rules of classification within this group

When the subject-matter of the detail is covered by any of the subgroups of the A47L 15/42, the classification at inventive level of the corresponding A47L 15/42 subgroup must be assigned.

The classification at inventive level or the Indexing Code (depending whether invention information or additional information are to classify) corresponding to the conveyor-type machine should additionally be assigned.

{relating to the conveyers}
Definition statement
This subclass/group covers:

Details exclusively related to the conveyers.

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with movement of the crockery baskets by other means { (for drinking glasses A47L 15/0065) }
Definition statement
This subclass/group covers:

Dishwashers in which the basket(s) loaded with the crockery to be washed is moved by means other than endless conveying devices.

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by lowering and lifting only
Definition statement
This subclass/group covers:

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by rotating only
Definition statement
This subclass/group covers:

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rotated by means of spraying water
Definition statement
This subclass/group covers:

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with moving baskets submerged in the cleaning fluid
Definition statement
This subclass/group covers:

Dishwashers in which the crockery to be washed is secured onto a movable basket, which is submerged in the cleaning fluid contained in a washing chamber.

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by lowering and lifting combined with a rotating movement
Definition statement
This subclass/group covers:

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by a sideways motion
Definition statement
This subclass/group covers:

Dishwashers characterized by alternating or reciprocating sideways movements, either of the crockery supporting arrangement (inside a washing chamber) or of the washing chamber.

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with crockery cleaned by brushes { (for drinking glasses A47L 15/0068) }
Definition statement
This subclass/group covers:

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with brushes on movable supports
Definition statement
This subclass/group covers:

Dishwashers in which the cleaning action is effected by the mechanical rubbing action of brushes arranged on movable supports.

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Details
Definition statement
This subclass/group covers:

Details of all dishwashers type.

References relevant to classification in this group
This subclass/group does not cover:
Details specific (i.e. not simply suitable for) of conveyor-type dishwashers
Special rules of classification within this group

If the aspect of the detail in conjunction with a particular type of dishwasher is important, in addition to the classification at inventive level of the detail (subject of the invention) also the classification at inventive level or by Indexing Code (depending whether invention information or additional invention) corresponding to the particular dishwasher-type should be given.

{ Water filter means or strainers}
Definition statement
This subclass/group covers:

Filter means, strainers or other similar arrangements which do not fit in any of the sub-classes

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Relationship between large subject matter areas

Macerators, i.e. chopping devices for reducing the size of entrained food particles in the water which are normally located in or associated in the pump, should be classified in A47L 15/4227. If the invention concerns a filter arrangement and a macerator then both classes should be given.

Informative references
Attention is drawn to the following places, which may be of interest for search:
(Pumps) further comprising macerator arrangement for chopping entrained food particles
Filtering arrangements of laundry washing machines
Special rules of classification within this group

When subclass(es) are assigned, the main class i.e. A47L 15/4202 should NOT routinely be assigned unless a particular extra feature relating to filtering that is not covered by the subclass(es) is mentioned.

Additional or interesting aspects related to filtering should be assigned the appropriate Indexing Code e.g. A47L 15/4204 Flat filters.

{ Flat filters}
Definition statement
This subclass/group covers:

Filter arrangements having a substantial two-dimentional shape.

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Special rules of classification within this group

If appropriate multiple classifications should be given; e.g. in case of flat filter with self-cleaning arrangement, A47L 15/4208 should also be given.

{ Tubular filters}
Definition statement
This subclass/group covers:

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Special rules of classification within this group

If appropriate multiple classifications should be given; e.g. in case of tubular filter with self-cleaning arrangement A47L 15/4208 should also be given.

{ Arrangements to prevent clogging of the filters, e.g. self-cleaning}
Definition statement
This subclass/group covers:

Arrangements which clear away foreign substances accumulated in filter devices and/or prevent foreign materials from remaining lodged in a filter.

Examples:

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Nozzle in a tubular filter.

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Spray arms used to clean flat filter.

Special rules of classification within this group

If appropriate multiple sub-classes should be given; e.g. in case of self-cleaning arrangement for a flat filter A47L 15/4204 should also be given.

If the arrangement comprises a controlling method, i.e. an application relates to an arrangement for cleaning of a filter and the control method thereof, in addition to the classification at inventive level the pertinent orthogonal Indexing Codes for the controlling methods (A47L 2301/00, A47L 2401/00, A47L 2501/00) may also be assigned.

{Safety arrangements for preventing water damage}
Definition statement
This subclass/group covers:

Arrangements for detecting and preventing water leakages:

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Controlling methods therefor:

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Water supply, e.g. plumbing to cold or warm water lines, valves, aquastops
Water recirculation
Water discharge, e.g. devices to prevent siphoning, non-return valves
Safety arrangements for preventing water damage in laundry washing machines
Special rules of classification within this group

If the controlling method to prevent water damage comprises the detection of the malfunction of a dishwasher component, the classification at inventive level or the Indexing Code (depending whether invention information or additional information are to classify) corresponding to this component should be assigned.

In case of controlling methods for preventing water damage, in addition to the classification at inventive level the pertinent orthogonal Indexing Codes for the controlling methods (A47L 2301/00, A47L 2401/00, A47L 2501/00) may also be assigned.

{ Detection of water leaks; Collection of leaked water, e.g. in the casing}
Definition statement
This subclass/group covers:

Liquid leak detection and collection arrangements placed between the appliance and the supporting surface immediately under the appliance (e.g. drip or catch pans).

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{ Water supply, recirculation or discharge arrangements; Devices therefor}
Definition statement
This subclass/group covers:

Water supply or recirculation or discharge arrangements or devices.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Liquid supply or discharge arrangements in laundry washing machines
Special rules of classification within this group

When subclass(es) are assigned, the main class i.e. A47L 15/4214 should NOT routinely be assigned unless a particular extra feature relating to an aspect that is not covered by the subclass(es) is mentioned.

Additional or interesting aspects related to water supply should be assigned the appropriate Indexing Code e.g. A47L 15/4217.

{ Fittings for water supply, e.g. valves or plumbing means to connect to cold or warm water lines, aquastops}
Definition statement
This subclass/group covers:

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References relevant to classification in this group
This subclass/group does not cover:
Safety arrangements for preventing water damage
Informative references
Attention is drawn to the following places, which may be of interest for search:
Liquid supply or discharge arrangements in laundry washing machines
Pipes; Joints or fittings for pipes; Supports for pipes; Cable s or protective tubing
Valves; Taps; Cocks; Actuating-floats; Device for venting or aerating
Safety valves
Measuring volume, volume flow, mass flow or liquid level, metering by volume
{ Water recirculation (A47L 15/0078 takes precedence) }
Definition statement
This subclass/group covers:

This subgroup covers details of the water recirculation piping.

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For example, venturi devices arranged in the washing water recirculation hydraulic circuit:

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References relevant to classification in this group
This subclass/group does not cover:
Safety arrangements for preventing water damage
Pump arrangements
Informative references
Attention is drawn to the following places, which may be of interest for search:
Liquid discharge or recirculation arrangements in laundry washing machines
Measuring volume, volume flow, mass flow or liquid level, metering by volume
{ Arrangements for redirection of washing water, e.g. water diverters to selectively supply the spray arms (A47L 15/0078 takes precedence) }
Definition statement
This subclass/group covers:

Deviating valves and control method thereof, which redirect the washing/rinsing fluid, e.g., between the upper and subgroupser spray arms or between the tub and a water storage tank.

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References relevant to classification in this group
This subclass/group does not cover:
Arrangements to modify spray patter or direction of spray
Informative references
Attention is drawn to the following places, which may be of interest for search:
Arrangement for selectively supplying water to detergent compartments of laundry washing machines
Valves per se
Special rules of classification within this group

If the arrangement comprises a controlling method, i.e. an application relates to an arrangement for changing the water flow and the control method thereof, in addition to the classification at inventive level the pertinent orthogonal Indexing Codes for the controlling methods (A47L 2301/00, A47L 2401/00, A47L 2501/00) may also be assigned.

{ Devices for water discharge, e.g. devices to prevent siphoning, non-return valves}
Definition statement
This subclass/group covers:

Water discharge arrangements and devices therefor. This subgroup covers details of the drainage system for draining the wash water from the washing tank to the outside of the dishwasher (e.g. siphon break, valves, venturi devices arranged in the waste water drain).

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References relevant to classification in this group
This subclass/group does not cover:
Filters
Pumps arrangements
Safety arrangements for preventing water damage
Informative references
Attention is drawn to the following places, which may be of interest for search:
Liquid supply or discharge arrangements in laundry washing machines
Liquid discharge or recirculation arrangements in laundry washing machines
Arrangements for avoiding detergent wastage in the discharge conduit of laundry washing machines
Pipes; Joints or fittings for pipes; Supports for pipes; Cable s or protective tubing
Valves; Taps; Cocks; Actuating-floats; Device for venting or aerating
Safety valves
Measuring volume, volume flow, mass flow or liquid level, metering by volume
{ Arrangements or adaption of recirculation or discharge pumps}
Definition statement
This subclass/group covers:

Arrangements of recirculation and/or discharge pumps and control methods therefor. It also covers pump electric motors arrangements.

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Laundry washing machines: arrangement or adaptations of pumps
Pumps in general
Dynamo-electric machines
Control or regulation of electrical motors
Special rules of classification within this group

If the arrangement comprises a controlling method, i.e. a document relates to a pump and a control method thereof, in addition to the classification at inventive level the pertinent orthogonal Indexing Codes for the controlling methods (A47L 2301/00, A47L 2401/00, A47L 2501/00) may also be assigned.

If the arrangement concerns the mounting of the pump to the tub (e.g. sealing, fitment within sump) it should be considered the addition of the classification at inventive level A47L 15/4246 - Details of the tub (or of the corresponding Indexing Code A47L 15/4246).

{ with macerator arrangements for chopping entrained food particles}
Definition statement
This subclass/group covers:

Arrangements to chop or mince food particles and control methods therefor.

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Disintegrating by knives or other cutting or tearing members which chop material into fragments
Specially adapted for disintegrating garbage, waste or sewage
For waste water or for garbage
{ Water softening arrangements}
Definition statement
This subclass/group covers:

Water softeners and control methods therefor.

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Softening using ion-exchange
Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal
Water softeners for laundry washing machines
Special rules of classification within this group

If the arrangement comprises a controlling method, i.e. the document relates to a water softener arrangement and a control method thereof, in addition to the classification at inventive level the pertinent orthogonal Indexing Codes for the controlling methods (A47L 2301/00, A47L 2401/00, A47L 2501/00) may also be assigned.

{Constructional details of the salt container or the ion exchanger}
Definition statement
This subclass/group covers:

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{ Steam generating arrangements}
Definition statement
This subclass/group covers:

Steam generating arrangements and control methods thereof.

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Steam generating arrangements for laundry washing machines
Laundry conditioning arrangements in domestic laundry driers
Steam generation in boilers
Special rules of classification within this group

If the arrangement comprises a controlling method, i.e. the document relates to a steam generating arrangement and a control method thereof, in addition to the classification at inventive level the pertinent orthogonal Indexing Codes for the controlling methods (A47L 2301/00, A47L 2401/00, A47L 2501/00) may also be assigned.

{ Arrangements to sterilize or disinfect dishes or washing liquids (A47L 15/4234 takes precedence) }
Definition statement
This subclass/group covers:

Arrangements to sterilize or disinfect dishes or washing liquids which do not fit in any of the sub-classes (e.g. microwaves arrangements for disinfecting).

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Special rules of classification within this group

If the application also relates to a particular treatment of the crockery, the Indexing Code A47L 2601/00 corresponding to this particular treatment on the crockery must also be assigned.

If the arrangement comprises a controlling method, i.e. the document relates to a sterilizing or disinfecting arrangement and a control method thereof, in addition to the classification at inventive level the pertinent orthogonal Indexing Codes for the controlling methods (A47L 2301/00, A47L 2401/00, A47L 2501/00) may also be assigned.

{ by using electrolytic cells}
Definition statement
This subclass/group covers:

Arrangements of electrolytic cells and control methods thereof.

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Laundry washing machines, apparatus or methods using electrochemical cells
Treatment of water by electrochemical methods
Special rules of classification within this group

If the application also relates to the treatment of the crockery by electrolysed water, the Indexing Code A47L 2601/06 corresponding to this particular treatment on the crockery must also be assigned. If the arrangement comprises a controlling method in addition to the classification at inventive level the pertinent orthogonal Indexing Codes for the controlling methods (A47L 2301/00, A47L 2401/00, A47L 2501/00) may also be assigned.

{ by using ozone}
Definition statement
This subclass/group covers:

Sterilizing arrangements using ozone and control methods thereof.

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Laundry washing machines, apparatus or methods using ozone
Preparation of ozone in general
Special rules of classification within this group

If the application also relates to the ozone treatment of the crockery, the Indexing Code A47L 2601/08 corresponding to this particular treatment on the crockery must also be assigned.

If the arrangement comprises a controlling method in addition to the classification at inventive level the pertinent orthogonal Indexing Codes for the controlling methods (A47L 2301/00, A47L 2401/00, A47L 2501/00) may also be assigned.

{ by using ultraviolet generators}
Definition statement
This subclass/group covers:

Sterilising arrangements using ultraviolet generators and control methods thereof.

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Special rules of classification within this group

If the application also relates to the ultraviolet treatment of the crockery, the Indexing Code A47L 2601/10 corresponding to this particular treatment on the crockery must also be assigned.

If the arrangement comprises a controlling method in addition to the classification at inventive level the pertinent orthogonal Indexing Codes for the controlling methods (A47L 2301/00, A47L 2401/00, A47L 2501/00) may also be assigned.

{ Water-level measuring or regulating arrangements}
Definition statement
This subclass/group covers:

Water-level measuring or regulating arrangements and control methods thereof.

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Water level measuring or regulating devices for laundry washing machines
Measuring volume, volume flow, mass flow or liquid level; Metering by volume
Electric switches; Relays; Selectors; Emergency protective devices
Special rules of classification within this group

If the water-level measuring or regulating arrangement comprises a controlling method, i.e. the purpose of the control is the water level, in addition to the classification at inventive level the pertinent orthogonal Indexing Codes for the controlling methods (A47L 2301/00, A47L 2401/00, A47L 2501/00) may also be assigned.

If the water level is the unique purpose of the controlling method, there is not need to also assign any classification at inventive level of the controlling methods (A47L 15/0018 and subgroups).

Example:

An application relates to a water-level regulating arrangement. It is disclosed the monitoring of a recirculation pump's parameter to measure the level of the water inside the tub and to close the water inlet valve once the desired water-level is reached.

This application should be classified as follow:

Water-level regulating arrangements ( purpose of the controlling) => A47L 15/4244

automatic detection inputted into the controlling means: recirculation pump's parameter => A47L 2401/08

component controlled by the controlling means: water inlet valve => A47L 2501/01

{ Details of the tub (A47L 15/4272 takes precedence) }
Definition statement
This subclass/group covers:

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{ Arrangements for dividing the tub compartment, e.g. for simultaneous washing of delicate and normal crockery}
Definition statement
This subclass/group covers:

Arrangements for creating multiple treating chambers within a single housing cabinet.

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{ Details of the casing (collecting leaked water in the casing for preventing water damage A47L 15/4212) }
Definition statement
This subclass/group covers:

Details of the external casing (housing cabinet) of the dishwashers

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Casing of laundry washing machines
Casing of domestic stove
Casing of water heaters
{ Supporting arrangements for the casing, e.g. rollers or supporting legs}
Definition statement
This subclass/group covers:

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Feet for furniture in general
Adjustable feet for furniture using screw means
Engineering details of attaching supporting legs on foundation or base
Refrigerators: general constructional features
Supporting arrangements for the casing of laundry washing machines
Legs for dishwashers casing (Japanese FI class)
A47L15/42&C
Legs or bases for the casing of laundry washing machines (Japanese F-term)
3B155/DA13
{ Insulation arrangements, e.g. for sound damping or heat insulation}
Definition statement
This subclass/group covers:

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Heat, sound or noise insulation
Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
Special rules of classification within this group

If the insulation arrangement is connected to the washing tub the indexing code corresponding to the details of the tub A47L 15/4246 should also be assigned.

{ Details of the loading door}
Definition statement
This subclass/group covers:

Details of the dishwasher's loading door, including door handles.

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References relevant to classification in this group
This subclass/group does not cover:
Door specially adapted for drawer-type dishwashers
Vertical sliding doors
Informative references
Attention is drawn to the following places, which may be of interest for search:
Laundry washing machine doors
Doors specially adapted for stoves or ranges
Refrigerator doors
Special rules of classification within this group

If the detail of the door is linked to another main aspect of the invention (guidance to the invention information is usually provided by the claims with due regard given to the description and the drawings) a multiple classification of the application may be appropriated.

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For example, if the invention relate to the arrangement in the door of control panels or electrical component (e.g. cables) the corresponding classification at inventive level for these additional invention information should also be given.

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{ Arrangements of locking or security/safety devices for doors, e.g. door latches, switch to stop operation when door is open}
Definition statement
This subclass/group covers:

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Door locks of laundry washing machines
Latches for doors specially adapted for stoves or ranges
Fastening devices for door in general
Electric switches; Relays; Selectors; Emergency protective devices
{ Connections of the door to the casing, e.g. door hinges}
Definition statement
This subclass/group covers:

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References relevant to classification in this group
This subclass/group does not cover:
Connections of the door to the casing specially adapted for drawer-type dishwashers
Open/closing mechanism of hood-type dishwashers
Informative references
Attention is drawn to the following places, which may be of interest for search:
Arrangements of door covering/decoration panels or plinths
Hinges in general
Mounting of doors specially adapted for stoves or ranges
{ Door sealing arrangements}
Definition statement
This subclass/group covers:

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Special rules of classification within this group

If the sealing arrangement is specially adapted for a certain type of dishwasher the Indexing Code corresponding to the particular type of the machine should be assigned.

Example:

Sealing arrangement for a drawer-type dishwasher: classification at inventive level A47L 15/4263, Indexing Code A47L 15/0084.

{ Arrangements of door covering/decoration panels or plinths, e.g. for integrated dishwashers}
Definition statement
This subclass/group covers:

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This subgroup also covers decorative elements to align the control panel to the door's decorative panel, e.g. strip-like elements which are incorporated between the control panel and the decorative panel.

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Refrigerator doors, covers
Kitchen cabinets, provision for incorporating apparatus operated by power
{ Arrangements for transporting or moving, e.g. stiffening}
Definition statement
This subclass/group covers:

Arrangements for transporting or moving the dishwashers, which also comprise reinforcements for discharging external clamping forces acting on the dishwasher housing.

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Arrangements for transporting laundry washing machines; protective arrangements to use during transport
{ Arrangements for setting the machine, e.g. anti-tip devices therefor, fixing of integrated machines}
Definition statement
This subclass/group covers:

Arrangements for setting the dishwasher housing, e.g. for prevention of tilting of the dishwasher's housing.

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Arrangements for installation of built-in dishwashers, i.e. arrangements for fixing dishwashers in installation recess of furniture.

For example, mounting plates or mounting angle brackets to fix dishwashers after insertion into installation niches of items of kitchen furniture.

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Arrangements for setting laundry washing machines
{ Supporting arrangements for the tub}
Definition statement
This subclass/group covers:

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{ Arrangement of electrical components, e.g. control units or cables (A47L 15/4293 takes precedence) }
Definition statement
This subclass/group covers:

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{ Arrangements to detect or remove bad smells or odours}
Definition statement
This subclass/group covers:

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Special rules of classification within this group

If the arrangement comprises a controlling method, i.e. the purpose of the control is, for example, the removal of the bad smells, in addition to the classification at inventive level the pertinent orthogonal Indexing Codes for the controlling methods (A47L 2301/00, A47L 2401/00, A47L 2501/00) may also be assigned.

{ Nozzles}
Definition statement
This subclass/group covers:

Nozzles per se and details of nozzles apertures arranged on spraying devices.

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Dishwashers specially adapted for drinking glasses
Spray pressure measuring or regulating arrangements
Nozzles, spray heads or other outlets
{ Rotary nozzles}
Definition statement
This subclass/group covers:

Rotary nozzles per se and details of rotary nozzles arranged on spraying devices.

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{ Arrangements to change or modify spray pattern or direction}
Definition statement
This subclass/group covers:

Arrangements to modify spray patterns and/or spray directions of spray nozzles and/or spraying devices.

The steering mechanisms may be part of the spray nozzles:

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or may be arranged inside the spraying devices:

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References relevant to classification in this group
This subclass/group does not cover:
Arrangements to selectively supply different spray devices
Informative references
Attention is drawn to the following places, which may be of interest for search:
Spray pressure measuring or regulating arrangements
{ Water-heater arrangements (Steam generating arrangements A47L 15/4234) }
Definition statement
This subclass/group covers:

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Heat pump arrangements
Laundry washing machines heating arrangements
Boilers
Electric heating
Water heaters
Special rules of classification within this group

If the arrangement comprises a controlling method, i.e. the document relates to a water-heater arrangement and a control method thereof, in addition to the classification at inventive level the pertinent orthogonal Indexing Codes for the controlling methods (A47L 2301/00, A47L 2401/00, A47L 2501/00) may also be assigned.

{ Temperature measuring or regulating arrangements}
Definition statement
This subclass/group covers:

Water and/or air temperature measuring or regulating arrangements.

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Regulation of operational steps within the washing processes
Detection or prevention of malfunction, including accident prevention
Temperature measuring or regulating devices for laundry washing machines
Measuring temperature, measuring quantity of heat
Control of temperature
Special rules of classification within this group

If the arrangement comprises a controlling method, i.e. the purpose of the control is the temperature of the water or of the air, in addition to the classification at inventive level the pertinent orthogonal Indexing Codes for the controlling methods (A47L 2301/00, A47L 2401/00, A47L 2501/00) must also be assigned.

{ Spray-pressure measuring or regulating arrangements (nozzles A47L 15/4278) }
Definition statement
This subclass/group covers:

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Nozzles - Arrangements to change or modify spray pattern or direction
Special rules of classification within this group

If the arrangement comprises a controlling method, i.e. the purpose of the control is the water pressure, in addition to the classification at inventive level the pertinent orthogonal Indexing Codes for the controlling methods (A47L 2301/00, A47L 2401/00, A47L 2501/00) must also be assigned.

{Recovery arrangements, e.g. for the recovery of energy or water}
Definition statement
This subclass/group covers:

Dishwashers with heat recovery arrangements, i.e. dishwashers comprising heat exchangers and/or heat pump arrangements in process water circuits for the purpose of storing and/or recovering thermal energy.

For example, in this subgroup are classified dishwashers comprising heat transfer arrangements for transferring thermal energy from the circulating (or waste) water to the feed water:

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An other example of dishwashers classified in this subgroup are dishwashers with water recovery arrangements, i.e. dishwashers comprising liquid storage container(s) for storing liquid (used in a previous wash/rinse phase of the wash cycle) in order to be reused subsequently:

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The water storage tanks may or may not be arranged in heat-exchange relation with the washing tub and/or the hydraulic circuit.

References relevant to classification in this group
This subclass/group does not cover:
Control of energy or water consumption
Heat pump arrangements during the drying phases
Informative references
Attention is drawn to the following places, which may be of interest for search:
Arrangements for the recovery of energy or water in laundry washing machines
Heat pump arrangements of domestic laundry driers
Heat-exchange apparatus Heat pump system
Domestic hot-water supply system
Special rules of classification within this group

If the arrangement comprises a controlling method, i.e. the document relates, for example, to a water recovery arrangement and a control method thereof, in addition to the classification at inventive level the pertinent orthogonal Indexing Codes for the controlling methods (A47L 2301/00, A47L 2401/00, A47L 2501/00) may also be assigned.

Water storage tanks may also be arranged in heat-exchange with the washing tub in order to act as condensing surface during the drying phase of an operating cycle. In this cases, the condensing aspect during the drying phase need to be classified by adding the corresponding symbol A47L 15/483 or A47L 15/483, depending if this aspect represents an invention or an additional information.

{ Arrangements for programme selection, e.g. control panels; Indication of the selected programme, programme progress or other parameters of the programme, e.g. by using display panels}
Definition statement
This subclass/group covers:

Arrangements for programme selection, e.g. jog dials, buttons, and any kind of visual or acoustical indicator means, which provide information on the operation, function or status of the machine and of any of its components.

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Control panels of laundry washing machine
Removable panels of domestic stoves
Control panels of domestic stoves
Mounting of control devices
Electro-, magneto- or acousto-optic display devices
Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
{Arrangements for detecting or measuring the condition of the crockery or tableware, e.g. nature or quantity}
Definition statement
This subclass/group covers:

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Measuring
Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprint (computer vision systems)
Arrangements for measuring or detecting the condition of the laundry, e.g. nature or weight
{Arrangements for detecting or measuring the condition of the washing water, e.g. turbidity}
Definition statement
This subclass/group covers:

Arrangements for detecting or measuring the condition of the water in terms of cloudiness or dirtiness, e.g. turbidity, foaming or level of bacteria, and further the condition of the water in terms of quantity, e.g. the amount of water left in the wash tub in case of incomplete drain. The subgroup also covers arrangements for measuring the washing water hardness.

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References relevant to classification in this group
This subclass/group does not cover:
Arrangements for measuring or controlling concentration of consumable products in water
Arrangements (i.e. devices) for measuring or controlling the water level
Informative references
Attention is drawn to the following places, which may be of interest for search:
Arrangements for detecting or measuring the condition of the washing water in laundry washing machines
Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible, or ultra-violet light.
Optical systems measuring the opacity of a fluid
Devices for adding cleaning agent; { Devices for dispensing cleaning agents, rinsing aids or deodorants}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Detergent compositions
Devices for dosing additives to water
Devices for adding soap or other washing agents in laundry washing machines
Stoves or ranges having self-cleaning provisions using a cleaning liquid
Indicating or measuring liquid level, or level of fluent solid material, e.g. indicating in terms of volume, indicating by means of an alarm
{by tipping containers or opening their lids, e.g. with the help of a programmer}
Definition statement
This subclass/group covers:

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Devices for adding washing agents in laundry washing machines, the powder or tables being added directly, without the need of a flushing liquid
{in the form of liquids (A47L 15/4409, A47L 15/4436, A47L 15/4445 take precedence) }
Definition statement
This subclass/group covers:

Arrangements for dispensing cleaning agents, rinsing agents and the like in a liquid state.

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Devices for adding washing agents in a liquid state in laundry washing machines
{entrained in the water supply line by a pressure drop, e.g. resulting from a Venturi throat}
Definition statement
This subclass/group covers:

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{in the form of a detergent solution made by gradually dissolving a powder detergent cake or a solid detergent block}
Definition statement
This subclass/group covers:

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Devices for dosing additives to water, in which the water progressively dissolves a solid compound
{ Detachable devices}
Definition statement
This subclass/group covers:

Detachable detergent dispensing devices and/or detachable detergent "cartridges". The detachable aspect rather than the way the dispensing is activated is important.

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References relevant to classification in this group
This subclass/group does not cover:
Aspects related to blister packaging or refill cartridge per se
Informative references
Attention is drawn to the following places, which may be of interest for search:
Insoluble free body dispenser
Free body dispenser for washing machines
{ with automatic identification means, e.g. barcodes, RFID tags or magnetic strips}
Definition statement
This subclass/group covers:

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Record carriers for use with machines and with at least a part designed to carry digital mark
Methods or arrangements for sensing record carrier
{ Multi-dose dispensing arrangements}
Definition statement
This subclass/group covers:

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Multiple dosing systems for laundry washing machines
{ Blister packaging or refill cartridges}
Definition statement
This subclass/group covers:

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{ Deodorants, perfumes or odor removals (A47L 15/4276 takes precedence) }
Definition statement
This subclass/group covers:

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{ Metering controlling devices (A47L 15/4229 takes precedence) }
Definition statement
This subclass/group covers:

Control units characterized by a dedicated control of the devices for dispensing cleaning agents, rinsing aid or deodorants.

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References relevant to classification in this group
This subclass/group does not cover:
Methods for metering consumable products
Devices for the automatic control of the different phases of cleaning; { Controlling devices (A47L 15/449 takes precedence) }
Definition statement
This subclass/group covers:

Controlling devices per se, e.g. electrical, mechanical, electro-mechanical controlling devices.

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References relevant to classification in this group
This subclass/group does not cover:
Controlling methods
Informative references
Attention is drawn to the following places, which may be of interest for search:
Electronic devices for laundry washing machines
Measuring electric variables, measuring magnetic variables
Control or regulating systems in general; functional elements of such systems; monitoring or testing arrangements for such systems or elements
Transmission systems for measured values, control or similar signals
Electric switches; Relays; Selectors; Emergency protective devices
Circuit arrangements or systems for supplying or distributing electric power; Systems for storing electric energy
Emergency protective circuit arrangements in general
Printed circuits; Casings or constructional details of electric apparatus; manufacture of assemblages of electrical components
Transmission of digital information
Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprint
Arrangement or mounting of control or safety devices
Drying arrangements
Definition statement
This subclass/group covers:

Drying arrangements which do not fit in any of the sub-classes.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Drying arrangements (Japanese FI class)
Drying apparatuses (Japanese F-term)
3B082/EE00
Domestic laundry drying cabinets or chambers having heating or ventilation means
General details of domestic laundry driers
Machines or apparatus for drying solid material or objects
Special rules of classification within this group

When subclass(es) are assigned, the main class i.e. A47L 15/48 should NOT routinely be assigned unless a particular extra feature relating to drying that is not covered by the subclass(es) is mentioned.

Additional or interesting aspects related to drying should be assigned the appropriate Indexing Code, e.g. A47L 15/483 by using condensers.

{ by using water absorbent materials, e.g. Zeolith}
Definition statement
This subclass/group covers:

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Special rules of classification within this group

Additional or interesting aspects related to drying should be assigned the appropriate indexing, class e.g. A47L 15/483 by using condensers.

{ by using condensers}
Definition statement
This subclass/group covers:

Condensing devices used to remove water during the drying process and heat pump arrangements.

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Heat pump arrangements of domestic laundry driers
Condensing arrangements of domestic laundry driers
Arrangements for the recovery of thermal energy
Special rules of classification within this group

Documents merely mentioning a condenser should not be classified here. This class is limited to special arrangements of such devices which are described in detail, provide an advantage over the prior art or solve a particular problem.

However, if the arrangement of the condenser could be interesting for common general knowledge or for future inventive step argumentation then the Indexing Code A47L 15/483 should be assigned.

{ by using alternative heat sources, e.g. microwave or infrared}
Definition statement
This subclass/group covers:

Arrangements using heat sources other than (conventional) electric resistors, e.g. microwaves and/or infrared lamps

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Relationship between large subject matter areas

These types of heating may also used for sterilising or disinfecting, see A47L 15/4236.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Microwave heating equipment of domestic laundry driers
Special rules of classification within this group

Additional or interesting aspects related to drying should be assigned the appropriate indexing class e.g. A47L 15/483 by using condenser.

{ Blower arrangements}
Definition statement
This subclass/group covers:

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Special rules of classification within this group

Documents merely mentioning a blower/fan should not be classified here. This class is limited to special arrangements of such devices which are described in detail, provide an advantage over the prior art or solve a particular problem.

However, if the arrangement of the blower could be interesting for common general knowledge or for future inventive step argumentation then the Indexing Code A47L 15/483 should be assigned.

Additional or interesting aspects related to drying should be assigned the appropriate Indexing Code e.g. by using condenser

If the position of the blower or fan is of particular importance this may also require an additional classification at inventive level, e.g. A47L 15/4257 for a fan located in the door.

{ Connections of the tub with the ambient air, e.g. air intake or venting arrangements}
Definition statement
This subclass/group covers:

Taking or expelling air from outside the machine (open air circuit).

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Air inlet or exhaust system (Japanese FI class)
A47L15/42&E
Air intake and venting (Japanese F-term)
3B082/BE00
Special rules of classification within this group

Additional or interesting aspects related to drying should be assigned the appropriate Indexing Code e.g. A47L 15/483 by using condenser.

Racks
Definition statement
This subclass/group covers:

Racks which do not fit in any of the sub-classes.

Relationship between large subject matter areas

If appropriate multiple classification, as provided for in the subgroups, should be given e.g. folding cutlery basket, A47L 15/503 and A47L 15/502 should be given.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Racks (Japanese F-term)
3B082/FF00
Crockery baskets; Draining-racks
Special rules of classification within this group

When subclass(es) are assigned, the main class i.e. A47L 15/50 should NOT routinely be additionally assigned unless a particular extra feature relating to racks that is not covered by the subgroup(es) is mentioned.

{ Baskets, e.g. for conveyer-type, in-sink type or hood-type machines}
Definition statement
This subclass/group covers:

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Relationship between large subject matter areas

Examples of machine per se which use such baskets:

machines specially adapted for drinking glasses A47L 15/0065;

hood type A47L 15/0081;

drawer-type dishwashers A47L 15/0084;

conveyer-type dishwashers A47L 15/24.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Sliding drawers; Slides or guides therefor
Miscellaneous kitchen containers including racks
Special rules of classification within this group

Additional or interesting aspects related to racks should be assigned the appropriate Indexing Code e.g. K47L14/50B.

{Cutlery baskets}
Definition statement
This subclass/group covers:

Cutlery baskets and/or drawers

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Relationship between large subject matter areas

If appropriate multiple classification as provided in the subgroups, should be given e.g. for folding cutlery basket, A47L 15/503 should also be given.

Special rules of classification within this group

Additional or interesting aspects related to racks should be assigned the appropriate Indexing Code e.g. K47L14/50C.

{with foldable parts}
Definition statement
This subclass/group covers:

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Special rules of classification within this group

Additional or interesting aspects related to racks should be assigned the appropriate Indexing Code e.g. K47L14/50C.

If appropriate multiple classification should be given, e.g.:

Folding cutlery basket, A47L 15/502 should also be given;

Folding insert, e.g. for holding a cup, A47L 15/505 should also be given.

{Arrangements for changing the height of racks}
Definition statement
This subclass/group covers:

For example, two height positions for rack.

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Special rules of classification within this group

Additional or interesting aspects related to racks should be assigned the appropriate Indexing Code e.g. K47L14/50C.

If appropriate multiple classification should be given e.g. if invention information also concerns a cutlery basket A47L 15/502 should also be assigned.

{ Inserts, e.g. for holding baby bottles, stemware or cups}
Definition statement
This subclass/group covers:

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Special rules of classification within this group

Additional or interesting aspects related to racks should be assigned the appropriate Indexing Code e.g. K47L14/50C.

If appropriate multiple classifications should be given, e.g. in case of folding insert for holding a cup, A47L 15/503 should also be given.

{Arrangements for lifting racks for loading or unloading purposes}
Definition statement
This subclass/group covers:

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Special rules of classification within this group

Additional or interesting aspects related to racks should be assigned the appropriate Indexing Code e.g. K47L14/50C.

If appropriate multiple classification should be given e.g. if invention information also concerns a cutlery basket A47L 15/502 should also be assigned.

{Arrangements for extracting racks, e.g. roller supports}
Definition statement
This subclass/group covers:

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Special rules of classification within this group

Additional or interesting aspects related to racks should be assigned the appropriate Indexing Code e.g. K47L14/50C.

If appropriate multiple classification should be given e.g. if invention information also concerns a cutlery basket A47L 15/502 should also be assigned.

{Hydraulic connections for racks}
Definition statement
This subclass/group covers:

Hydraulic connections of the spraying arms, when these latter are also connected to the dishwasher racks.

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Special rules of classification within this group

Additional or interesting aspects related to racks should be assigned the appropriate Indexing Code e.g. A47L 15/502.

Depending from the spray arms type connected the corresponding Indexing Codes should be assigned (A47L 15/18 and its subgroups).

If appropriate multiple classification should be given e.g. if invention information also concerns a cutlery basket A47L 15/502 should also be assigned.

Apparatus or implements used in manual washing or cleaning of crockery, table-ware, cooking-ware or the like (foam-making devices A47K 5/14)
Definition statement
This subclass/group covers:

Apparatus or implements used in manual washing or cleaning of crockery, table-ware, cooking-ware or the like.

Manual operation of the user is required for performing the cleaning action.

The items to be cleaned can be crockery or table-ware (which can also usually be cleaned by dishwashing machines), but also bigger items such as oven plates.

Relationship between large subject matter areas

Brushes specially adapted for washing or cleaning bottles are classified in A46B. If the implement is not simply a brush, then it should be classified in A47L 17/04, although it can contain a brush or bristles.

A47L 15/00 relates to what is generally known as dishwashers or dishwashing machines. A47L 17/00 relates to apparatus and implements, which are generally smaller and simpler devices than the machines of A47L. These apparatus and implements are generally not provided with electrically fed elements (such as a motor), although this must not always be the case; i.e. some apparatus and implements of A47L 17/00 can have a small motor.

A47L 13/16 contains generally pads for domestic cleaning. If the pad is specially adapted for crockery, table-ware or cooking-ware, then it should be classified in A47L 17/08.

References relevant to classification in this group
This subclass/group does not cover:
Brushes for cleaning bottles
Informative references
Attention is drawn to the following places, which may be of interest for search:
Tables; desks; office furniture; cabinets; drawers; general details of furniture
Wash basins
Domestic plumbing installations for fresh water or waste water; sinks
Sinks
Automatic washing or cleaning of crockery, table-ware, cooking-ware or the like.
Drying devices for crockery or table-ware, e.g. tea-cloths
Definition statement
This subclass/group covers:

Drying devices for crockery or table-ware. Their degree of complexity ranges from a draining board or rack where the items are placed and dried by letting the water drip to more complex ones involving an air circulation.

References relevant to classification in this group
This subclass/group does not cover:
Racks of dishwashers
Drying arrangements for dishwashers
Informative references
Attention is drawn to the following places, which may be of interest for search:
Cabinets/racks for storing dishware
Kitchen equipment
Trays for sterilisation
Drying in general
Polishing of table-ware, e.g. knives, forks, spoons
Definition statement
This subclass/group covers:

Implements, machines and supports or rests used for polishing of table-ware.

Relationship between large subject matter areas

Polishing involves a treatment of the surface of the table-ware items that is not present in the washing or cleaning operations of A47L 17/00.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Household or table equipment
Grinding, polishing
Cleaning or de-greasing of metallic material
Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Polishing
Polishing involves a treatment of the surface e.g. of table-ware items to achieve a glossy surface.
Cleaning footwear
Definition statement
This subclass/group covers:

All aspects of cleaning footwear in the domestic ambit, including the upper as well as the sole.

Shoe cleaning machines and hand implements for shoe cleaning.

Shoe-shine stands and devices for holding footwear during cleaning or shining.

Devices and implements for drying footwear.

Storing shoe-cleaning equipment

Devices or implements resting on the floor e.g. doormats, gratings.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Carpets; Stair runners; Bedside rugs; Foot mats
Embroidering; tufting
Footwear per-se and machines, tools, equipment or methods for manufacturing or repairing footwear
Car mats
Miscellaneous cleaning devices (for cleaning spectacles G02C 13/00)
Definition statement
This subclass/group covers:

Other cleaning devices used in domestic cleaning, whose subject-matter is not covered by the previous groups.

Including, in particular, cleaning devices using adhesive or tacky surfaces (lint removers) and devices for cleaning cloths, buttons, clasps, military insignia, door-knobs and for cleaning lamp chimneys.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Devices for cleaning spectacles
Adhesives in the form of films or foils
Reconditioning of record carriers; Cleaning of record carriers; (N: carrying off electrostatic charges]
Robotic cleaning machines, i.e. with automatic control of the travelling movement or the cleaning operation
Definition statement
This subclass/group covers:

This entry - A47L 2201/00 - is an orthogonal code identifying aspects or details of robotic or autonomous suction cleaners (A47L 5/00; A47L 7/00; A47L 9/00) or cleaning machines (A47L 11/00) for cleaning floors, carpets, furniture, walls, or wall coverings, which are particular of robotic cleaners. This entry - A47L 2201/00 - comprises inventive as well as additional information, covering in particular:

Docking stations: Static station where the autonomous cleaner is serviced for further cleaning - i.e. recharging of batteries, emptying dust container, exchange of cleaning brushes,...

Automatic control of the travelling movement: Navigation system, automatic obstacle detection,...

Control of the cleaning action for autonomous devices: Automatic detection of the surface type and application of the corresponding cleaning action (sweeping, scrubbing, vacuuming,...).

Informative references
Attention is drawn to the following places, which may be of interest for search:
Control of position, course or altitude of land, water, air, or space vehicles, e.g. automatic pilot.
This page is owned by Office of Patent Classification.
Last Modified: 10/11/2013