CPC Definition - Subclass F16K

Last Updated Version: 2022.01
VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L 55/07)}
Lift valves {or globe valves}, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces ({in combination with sliding valves F16K 3/246, F16K 3/267} ; diaphragm valves F16K 7/00)
References
Limiting references

This place does not cover:

In combination with sliding valves

F16K 3/246, F16K 3/267

Diaphragm valves

F16K 7/00

Informative references

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

Functional types of lift valves

F16K 15/00, F16K 17/00, F16K 24/00, F16K 31/00, F16K 31/06

with screw-spindle (F16K 1/12 - F16K 1/28 take precedence; actuating mechanisms with screw-spindles F16K 31/50)
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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References
Informative references

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

For the actuation mechanism

F16K 31/50

with a cut-off member rigid with the spindle, e.g. main valves
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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with streamlined valve member around which the fluid flows when the valve is opened
Definition statement

This place covers:

The valve member is within the flow passage.

Illustrative example:

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{with stationary valve member and moving sleeve}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{actuated by fluid}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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References
Limiting references

This place does not cover:

Valves actuated by fluid in general

F16K 31/12

with ball-shaped valve member (check valves F16K 15/04)
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media5.jpg

References
Informative references

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

Check valves

F16K 15/04

Safety/equalising valves

F16K 17/0406

Fluid delivery valves of the self-closing type

F16K 21/08

Venting valves

F16K 24/046

with pivoted closure-members
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{with a plurality of closure members}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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with pivoted discs or flaps
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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with axis of rotation arranged externally of valve member
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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Movable sealing bodies
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{the movement being caused by the flowing medium}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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with valve members that, on opening of the valve, are initially lifted from the seat and next are turned around an axis parallel to the seat
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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specially adapted for pressure containers
Definition statement

This place covers:

High-pressure valves, generally used in connection with pressure containers. See also F17C (Gas vessels) and G05D (Pressure regulators).

Illustrative example:

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References
Informative references

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

Connectors used in connection with pressure containers / the connectors comprising valves

F16L 37/28

{only shut-off valves, i.e. valves without additional means}
Definition statement

This place covers:

Valves used for opening/closing the flow path, without other functions (e.g. regulation) or other valves on the same valve body (e.g. safety valves).

{with valve member and actuator on the same side of the seat}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{with a valve member, e.g. stem or shaft, passing through the seat}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{Shut-off valves with additional means}
Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Additional means

Valves or devices, used for other functional purposes than only opening/closing the valve (e.g. regulation, safety, monitoring).

{Additional means used in combination with the main valve}
References
Limiting references

This place does not cover:

Flow regulation

G05D

Special rules of classification

The application focuses on the "other" functions of the main valve.

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Additional means

Valves or devices, used for other functional purposes than only opening/closing the valve (e.g. regulation, safety, monitoring).

{Connecting means}
Definition statement

This place covers:

Details of the (permanent) connection of the valve to the container.

References
Limiting references

This place does not cover:

Connectors per se (quick connectors with valves)

F16L 37/28

Details (details of more general applicability F16K 25/00 - F16K 51/00)
Definition statement

This place covers:

Details (e.g. shape, materials, function) of valve members, seats, attaching members to spindles, preventing rotation, additional adjustment (with additional means) of the flow and other arrangements of the valve member for modifying the rate of flow (see sub-classes).

Cutting-off parts, e.g. valve members, seats (F16K 1/06, F16K 1/12, F16K 1/14, F16K 1/26 take precedence)
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{contacting in the closed position, over a substantial axial length, a seat surface having the same inclination}
Definition statement

This place covers:

E.g. "needle" valves.

{the seats being in series}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{with additional cleaning or venting means between the two seats}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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Attachment of sealing rings
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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Attaching valve members to screw-spindles
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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Preventing rotation of valve members
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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Means for additional adjustment of the rate of flow
Definition statement

This place covers:

Additional means for adjusting the rate of flow in combination with the cutting-off parts.

Arrangements for modifying the way in which the rate of flow varies during the actuation of the valve
Definition statement

This place covers:

Only the valve member modifies the flow during the actuation of the valve.

Illustrative example:

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Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing (F16K 5/00 takes precedence; in barrages or weirs E02B 8/04)
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{Curtain gate valves}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{Guillotine or blade-type valves, e.g. no passage through the valve member}
Definition statement

This place covers:

Blade-type: no through-hole is present in the valve member.

Illustrative example:

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with a closure member in the form of an iris-diaphragm
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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with circular plates rotatable around their centres
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{the axis of supply passage and the axis of discharge passage being coaxial and parallel to the axis of rotation of the plates}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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with special arrangements for separating the sealing faces or for pressing them together
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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with wedge-shaped arrangements of sealing faces
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{by means of toggle links}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{by means of cams}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{by means of hydraulic forces}
Definition statement

This place covers:

The closure members are pushed towards the seats by hydraulic forces.

Illustrative example:

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References
Limiting references

This place does not cover:

Fluid actuation of the valve

F16K 31/12

{by movement of toggle links}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media34.jpg

{by means of hydraulic forces}
Definition statement

This place covers:

The seat members are pushed towards valve members by hydraulic forces.

References
Limiting references

This place does not cover:

Fluid actuation of the valve

F16K 31/12

with sealing faces shaped as surfaces of solids of revolution (F16K 13/02 takes precedence; with resilient valve members F16K 3/28)
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media35.jpg

References
Limiting references

This place does not cover:

Taps and cocks

F16K 5/00

Multiple-way (e.g. more than two) sliding valves with sealing faces shaped as surfaces of solids of revolution

F16K 11/00

{Packings (F16K 3/246 takes precedence)}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{Combination of a sliding valve and a lift valve}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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with fluid passages in the valve member
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{with a transverse bore in the valve member}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{with a sleeve sliding in the direction of the flow line}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{Combination of a sliding valve and a lift valve (F16K 3/262, F16K 3/265 take precedence)}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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with resilient valve members
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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Details
Definition statement

This place covers:

Constructional details of the valve member, guiding and attachment to the spindle, lubrication and other details of special arrangements for influencing the flow.

{Plug valves;} Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary (taps of the lift-valve type F16K 1/00)
References
Limiting references

This place does not cover:

Multiple way taps or cocks

F16K 11/00

with plugs having conical surfaces; Packings therefor
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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with plugs having cylindrical surfaces; Packings therefor
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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with plugs having spherical surfaces; Packings therefor
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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Details
Definition statement

This place covers:

Details of the valve member's sealing not covered by F16K 5/02 - F16K 5/06; Lubrication; Other means for adjusting the flow.

with tubular diaphragm
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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constrictable by external radial force
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{by electric or magnetic means}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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by means of a screw-spindle, cam, or other mechanical means {(F16K 7/045 takes precedence)}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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by means of fluid pressure
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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with inflatable member
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{the seat being formed on the bottom of the fluid line}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{the seat being formed on a rib perpendicular to the fluid line}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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arranged to be deformed against a flat seat
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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with diaphragm secured at one side only, e.g. to be laid on the seat by rolling action
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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with a compressible solid closure member
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
References
Limiting references

This place does not cover:

Faucet diverter valves

E03C

with all movable sealing faces moving as one unit
Definition statement

This place covers:

A common valve member seals several seats

with movable valve members positioned between valve seats
Definition statement

This place covers:

Stationary valve seats and a movable valve member.

Illustrative example:

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with valve seats positioned between movable valve members
Definition statement

This place covers:

Stationary seats positioned between movable valve members.

Illustrative example:

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with pivoted closure members, e.g. butterfly valves
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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with ball-shaped valve members
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{moving in a combined straight line and rotating movement}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{with flat slides}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{comprising locking elements}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{comprising means to avoid jamming of the slide or means to modify the flow}
Definition statement

This place covers:

Including means for modifying the flow for avoiding the jamming of the slide.

Illustrative example:

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{comprising particular spool-valve sealing means}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{with fluid passages through the valve member (F16K 11/0704, F16K 11/0708, F16K 11/0712 take precedence)}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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with pivoted closure members
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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with pivoted and linearly movable closure members
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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with two or more closure members not moving as a unit
Definition statement

This place covers:

Multiple-way valves with either a common acutating means or separate actuating means for every valve member.

Other constructional types of cut-off apparatus (means for plugging pipes or hoses F16L 55/10); Arrangements for cutting-off
Definition statement

This place covers:

Valve arrangements which do not belong per se to any of the previous constructional classes or having a function which cannot be classified under the existing functional classes.

with both sealing faces shaped as small segments of a cylinder and the moving member pivotally mounted
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{with a breakable closure member}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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by means of liquid or granular medium
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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Check valves (valves specially adapted for inflatable balls A63B 41/00)
Definition statement

This place covers:

Valves that normally allow fluid (liquid or gas) to flow through it in only one direction. (also known as non-return valve, reflux valve, retention valve, one-way valve or as clack valve).

Relationships with other classification places

Check valves may also be characterized by their structural type (i.e. lift valves, gate valves/sliding valves, plug valves/taps/cocks, diaphragm valves, multiple-way valves) in the following groups F16K 1/00 - F16K 13/00, when it is not possible to fully classify the structural features in F16K 15/00 alone.

References
Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Inhalers with inhalation check valves

A61M 15/0013

Inhalers with exhalation check valves

A61M 15/0018

One-way valves in medical respiratory devices

A61M 16/208

Check valves for medical applications. Details of check valves in devices for introducing media into, or onto, the body

A61M 39/24

Valves specially adapted for inflatable balls

A63B 41/00

Check valves used in devices for preventing contamination of drinking-water pipes

E03C 1/104, E03C 1/106

Using check valves with a crankcase

F01M 2013/0494

Valves for positive displacement machines, pumps

F04B 1/182, F04B 39/10, F04B 53/10

Check valves for hydraulic or pneumatic systems

F15B 13/027

Check valves in means for varying tension of belts

F16H 2007/0859

Check valves for lubrication systems

F16N 23/00

Informative references

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

Three-way check or safety valves with two or more closure members

F16K 11/105

Safety valves; Equalising valves

F16K 17/00

Details on the construction of the housing in check valves of the lift valve type

F16K 27/0209

Special rules of classification

If the structural features of the check valve cannot be fully classified in this area or when special features so entitle, then classification in F16K 1/00 or F16K 11/04 and respective subgroups should also be considered.

In some exceptional cases, valves classified in F16K 17/00 can also be classified in this subgroup when structural features so entitle. In general, if the structural features are already fully classified in F16K 17/00, then additional classification in F16K 15/00 is not needed.

Classification should also be given in F16K 11/105 if the valve is a multi-way valve.

Reference "valves specially adapted for inflatable balls A63B 41/00" is non-limiting in the main group F16K 15/00. CPC will be corrected once this inconsistency is resolved in IPC.

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Valve member

generally refers to the component that is moving relative to the seating surface. The valve member itself may be stationary, but there is generally relative movement between it and the seating surface during opening and closing of the valve.

with guided rigid valve members
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media113.png

{the valve member being a movable body around which the medium flows when the valve is open (F16K 15/025 - F16K 15/12 take precedence)}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media88.png

References
Limiting references

This place does not cover:

Check valves with guided rigid valve members having particular constructional features.

F16K 15/025 - F16K 15/12

{the valve member consisting only of a predominantly disc-shaped flat element}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media121.png

References
Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Disc valves in compressors

F04B 39/102

{the valve being loaded by a spring (F16K 15/03 - F16K 15/12 take precedence)}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media132.png

References
Limiting references

This place does not cover:

Check valves with guided rigid valve members being loaded by a spring of particular constructional types covered by groups

F16K 15/03 - F16K 15/12

{the valve member consisting only of a predominantly disc-shaped flat element}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media143.png

with a hinged closure member {or with a pivoted closure member}
Definition statement

This place covers:

Check valves with a hinged closure member or with a pivoted closure member.

Illustrative example of subject matter classified in this group.

media154.png

{the hinge being flexible}
Definition statement

This place covers:

Rigid valve members connected by a hinge formed of a flexible member.

Illustrative example of subject matter classified in this group. media165.jpegmedia176.jpeg

Special rules of classification

For purposes of classification, pivoted valves as shown below, would be considered as flexible member are NOT classified here, and are normally placed in F16K 15/14 - F16K 15/16.

media187.png

Even though hinge (24) is flexible, since the valve member is also flexible and not rigid, it would be better classified in F16K 15/14 - F16K 15/16.

{spring-loaded}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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media89.png

{weight-loaded}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{with a plurality of valve members}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media111.png

Centrifugal pump with splitter vane/shut-off valve system

media114.png

{Dual valve members with hinges crossing the flow line substantially diametrical}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media115.png

{having a common hinge}
Definition statement

This place covers:

Illustrative examples of subject matter classified in this group.

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shaped as balls
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media118.png

References
Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Ball valves in devices for introducing media into, or onto, the body

A61M 2039/248

Ball valves in positive displacement machines, pumps

F04B 39/1006

{with a plurality of balls}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media119.jpg

{spring-loaded}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media120.png

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{by a spring other than a helicoidal spring}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{Ball features}
Definition statement

This place covers:

Ball valves in which the ball has features considered to be special characteristics in view of the inventive concept.

Illustrative example of subject matter classified in this group.

media125.png

with guided stems
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media126.jpg

References
Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Check valves with guided stems in devices for introducing media into, or onto, the body

A61M 2039/2486

{the valve being loaded by a spring}
Definition statement

This place covers:

Illustrative examples of subject matter classified in this group.

media127.jpg

media128.png

{with a spring other than a helicoidal spring}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media209.png

media131.png

{spring pulling the closure member against the seat}
Definition statement

This place covers:

Illustrative examples of subject matter classified in this group.

media133.png

media134.png

{with a plurality of valve members}
Definition statement

This place covers:

Illustrative examples of subject matter classified in this group.

media135.png

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{stem guided at two or more points}
Definition statement

This place covers:

Valves where the stem is guided at two or more points along the longitudinal axis of the valve member.

Illustrative example of subject matter classified in this group.

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A guided closure member is also considered a guide point, as illustrated below.

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shaped as rings
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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media141.jpg

integral with, or rigidly fixed to, a common valve plate
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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References
Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Annular disc valves in compressors

F04B 39/1033

Hoerbiger valves in compressors

F04B 39/1053

Springs for ring valves
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media144.png

with flexible valve members
Definition statement

This place covers:

Check valve in which the valve member is made of resilient deformable material which yields in response to pressure to open the valve.

References
Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Slit valve specially adapted for medical use

A61M 2039/2426

Valve comprising a resilient or deformable element specially adapted for medical use

A61M 2039/2433 - A61M 2039/2466

Valves formed of one or more flexible elements in positive displacement machines for liquids; pumps

F04B 53/1047 - F04B 53/107

{having a plurality of independent valve members}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media145.png

media146.png

{having an integral flexible member cooperating with a plurality of seating surfaces}
Definition statement

This place covers:

A single flexible valve member controls the flow through a plurality of openings, by cooperating with the seating surface of each of the individual openings.

Illustrative example of subject matter classified in this group.

media147.png

{the closure elements not being fixed to the valve body}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media148.png

media149.png

References
Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Flexible disc check valves not being fixed to the valve body specially adapted for medical use

A61M 2039/2453

{the closure elements being shaped as solids of revolution, e.g. toroidal or cylindrical rings}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media150.png

{the closure elements being fixed along all or a part of their periphery}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media151.png

{with biasing means in addition to material resiliency, e.g. spring}
Definition statement

This place covers:

Valves with flexible members where there is a biasing means in addition to the resiliency of the flexible valve member.

Illustrative example of subject matter classified in this group.

media152.png

media153.png

{the closure elements being shaped as a solids of revolution, e.g. cylindrical or conical}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media155.jpg

{the closure elements having specially formed slits or being of an elongated easily collapsible form}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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media157.png

References
Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Slit valves in devices for introducing media into, or onto, the body

A61M 2039/2426

Valves for dispensing bottles, e.g. ketchup squeeze bottle

B65D 47/2031

Slit valves in containers for storage or transport

B65D 51/165

{slits arranged along multiple axes}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media158.png

{the closure elements being fixed onto an internally extending mount}
Definition statement

This place covers:

Illustrative examples of subject matter classified in this group.

media159.png

media160.png

{the closure elements being fixed in their centre}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media161.png

{with biasing means in addition to material resiliency, e.g. spring}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media162.png

media163.png

with tongue-shaped laminae
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media164.png

References
Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Valve comprising a resilient or deformable flap, specially adapted for medical use

A61M 2039/244

Reed valves for positive displacement machines for liquids, pumps

F04B 39/1073

{with biasing means in addition to material resiliency, e.g. spring}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media166.png

media167.png

{with limit stop}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media168.png

media169.png

with actuating mechanism; Combined check valves and actuated valves
Definition statement

This place covers:

This subgroup includes two different categories:

  • check valves with an actuating mechanism F16K 15/182 and subgroups
  • combined check valves and actuated valves F16K 15/184 and subgroups
{with actuating mechanism}
Definition statement

This place covers:

Check valves with an actuating mechanism that can alternatively move or hold the valve closure member open or closed.

Illustrative example of subject matter classified in this group.

media170.png

{for check valves with a hinged or pivoted closure member}
Definition statement

This place covers:

Check valves with a hinged or pivoted closure member and with an actuating mechanism that can alternatively move or hold the valve closure member open or closed.

Illustrative example of subject matter classified in this group.

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Ref 508: magnet.

media172.png

{for ball check valves}
Definition statement

This place covers:

Ball check valves with an actuating mechanism that can alternatively move or hold the valve closure member open or closed.

Illustrative example of subject matter classified in this group.

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media174.png

{for check valves with flexible valve members}
Definition statement

This place covers:

Check valves with flexible valve members and with an actuating mechanism that can alternatively move or hold the valve closure member open or closed.

Illustrative example of subject matter classified in this group.

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{Check valves which can be actuated by a pilot valve}
Definition statement

This place covers:

Check valves which can be actuated by a pilot valve.

Illustrative example of subject matter classified in this group.

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Ref 60, 62 check valves and 68 pilot valve

{Combined check valves and actuated valves}
Definition statement

This place covers:

Valve arrangements including a check valve in combination with an actuated valve.

Illustrative example of subject matter classified in this group.

media178.png

{for check valves with a hinged closure member}
Definition statement

This place covers:

Valve arrangements including a check valve with a hinged or pivoted closure member in combination with an actuated valve.

Illustrative example of subject matter classified in this group.

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media180.png

{for ball check valves}
Definition statement

This place covers:

Valve arrangements including a ball check valve in combination with an actuated valve.

Illustrative example of subject matter classified in this group.

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media182.png

media183.png

{for check valves with flexible valve members}
Definition statement

This place covers:

Valve arrangements including a check valve with flexible valve member in combination with an actuated valve.

Illustrative example of subject matter classified in this group.

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media185.png

Disposable dental valve device having a check valve

Ref. 18 main rotary plug valve member and 66 flex check valve

{Check valves combined with valves having a rotating tap or cock}
Definition statement

This place covers:

Valve arrangements including a check valve in combination with actuated valves having a rotating tap or cock.

Illustrative example of subject matter classified in this group.

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specially designed for inflatable bodies, e.g. tyres (connecting valves to inflatable bodies B60C 29/00)
Definition statement

This place covers:

Apparatus comprising valved inflation stems of the type attached to pneumatic tires and analogous inflatable articles, including filling and/or relief extensions of such stems, valved filling chucks or the type attached to pressure fluid supplying conduits and employed to inflate such articles by means of the inflation stems, and combinations of such inflation stems and filling chucks.

Illustrative example of subject matter classified in this group.

media188.png

Valve construction for tubeless tire

References
Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Inflatable mattresses

A47C 27/081

Hollow inflatable balls

A63B 41/00

Inflatable kites

A63H 27/085

Valves for balloons

A63H 2027/1083

Arrangements of tyre-inflating valves relative to tyres or wheel rims; connection of valves to wheel rims, tyres or other inflatable elastic bodies

B60C 29/00

Dunnage (inflatable bags for packaging, load protection) for trailers

B60P 7/065

Dunnage for trains

B61D 45/008

Inflatable boats

B63B 7/08

Dunnage in general

B65D 81/052

Special rules of classification

Reference "connecting valves to inflatable bodies B60C 29/00" is non-limiting in the subgroup F16K 15/20. CPC will be corrected once this inconsistency is resolved in IPC.

{and with flexible valve member}
Definition statement

This place covers:

Flexible element controls flow into or out of inflatable article.

Illustrative example of subject matter classified in this group.

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Ball with inflation valve sleeve for rapid deflation

media190.png

media191.png

Releasing valve for an inflatable object

{and with closure plug}
Definition statement

This place covers:

Devices including a feature other than the valve member that obstructs a valve inlet or outlet.

Illustrative example of subject matter classified in this group.

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Air Valve

{and combined with other valves, e.g. safety valves}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media193.png

Pressure regulator and method of use

media194.png

Air regulator for tires

Safety valves; Equalising valves, {e.g. pressure relief valves}
Special rules of classification

Check valves (F16K 15/00) can be classified in this sub-class when their function can be identified as falling under this title.

{reacting to pressure and temperature}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media73.png

References
Limiting references

This place does not cover:

Actuated by temperature only

F16K 31/002

{specially adapted for shelters}
Definition statement

This place covers:

Adapted for bomb-shelters.

{Arrangements of valves and flow lines specially adapted for mixing fluids (multiple-way valves F16K 11/00)}
Definition statement

This place covers:

When no details of the valve members or seats are disclosed in the document.

Fluid-delivery valves, {e.g. self-closing valves} (for liquid handling B67D; for flushing devices for water-closets or the like E03D)
Definition statement

This place covers:

Valves that are either self-closing or provide a continuous small flow.

Valves for preventing drip from nozzles
References
Informative references

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

Nozzles, spray heads or other discharge apparatus for spraying or atomising

B05B

Devices, e.g. valves, for venting or aerating enclosures (equalising valves F16K 17/00; arrangement or mounting in pipes or pipe systems F16L 55/07; venting or aerating as an additional function of steam traps or like apparatus F16T; ventilation of rooms, vehicles, see the appropriate subclass, e.g. F24F)
References
Informative references

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

Fuel tanks

B60K

for venting only (F16K 24/02 takes precedence)
Definition statement

This place covers:

The air (or fluid) from the circuit is released.

for aerating only (F16K 24/02 takes precedence)
Definition statement

This place covers:

Fluid (air) is admited in the circuit.

References
Limiting references

This place does not cover:

Venting of plumbing installations, waste pipes

E03C

Details relating to contact between valve members and seat (sealing constructions, see the appropriate groups according to the type of valve; movement of valve members other than for opening and closing F16K 29/00)
Definition statement

This place covers:

Materials and arrangements of valve members and seats not otherwise provided for

Arrangements using fluid issuing from valve members or seats
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media74.jpg

{Housing formed from a plurality of the same valve elements}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media75.png

{the valve member retained by a removable closure}
Definition statement

This place covers:

Devices in which the valve housing is provided with a removable closure element which retains the valve member in assembled relation with its seat.

Illustrative example of subject matter classified in this group.

media176.jpeg

{Actuating devices;} Operating means; Releasing devices {(regulating means G05D)}
References
Limiting references

This place does not cover:

Magnetic constructions with armature (actuators)

H01F 7/08

Control or regulation of electric motors

H02P 7/00

{actuated by temperature variation (thermo-electric F16K 31/025)}
References
Limiting references

This place does not cover:

Sensitive elements producing movements (e.g. bimetallic strips).

G12B 1/02

Informative references

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

Shape memory alloy

F03G 7/0614

{operated without a stable intermediate position, e.g. with snap action (F16K 31/56 takes precedence)}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media76.png

{actuated by piezo-electric means}
References
Informative references

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

Piezo-electric devices

H01L 41/00

electric {(F16K 31/004 takes precedence)}; magnetic
References
Limiting references

This place does not cover:

Magnetic circuits and magnets in general

H01F

using a motor
References
Limiting references

This place does not cover:

Details of the magnetic circuit of the motor

H02K 1/00

{Multiple-way valves}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{with cylindrical slides}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

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{with flat slides}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media79.png

{the valve element being at least partially ball-shaped}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media80.png

{with movable valve member positioned between seats}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media81.png

{with fixed seats positioned between movable valve members}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media82.png

{the armature and the valve member forming one element (F16K 31/0651 takes precedence)}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media83.png

{Armature and valve member being one single element}
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media84.png

Handles {(form, features or function of taps or faucet handles for domestic plumbing installations E03C 1/04)}
References
Limiting references

This place does not cover:

Form, features and function of taps or faucets handles

E03C 1/04

Floats for actuation of valves or other apparatus {(float actuated valves F16K 31/18)}
Definition statement

This place covers:

Construction of the float per se.

Means to prevent accidental or unauthorised actuation
Definition statement

This place covers:

Locking or interlocking the valve actuating device. Not the lock per se.

References
Informative references

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

Locks

E05B

Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
References
Informative references

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

Testing or monitoring control systems or parts; Electric testing

G05B

{For recording or indicating the functioning of a valve in combination with test equipment}
References
Limiting references

This place does not cover:

Above ground control means for valves in boreholes or wells

E21B 34/16

Testing static or dynamic balance of machines or structures; Investigate fluid-tightness (leaks)

G01M 3/00

Testing or monitoring control systems or parts; Electric testing

G05B 23/02

Devices for relieving the pressure on the sealing faces
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media85.jpg

Spindle sealings
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media86.jpg

{by fluid}
Definition statement

This place covers:

It refers to sealings by fluid in general, not only liquid.

with stuffing-box {; Sealing rings}
Definition statement

This place covers:

Sealings with stuffing-box OR sealing ring.

Auxiliary closure means in valves, which in case of repair, e.g. rewashering, of the valve, can take over the function of the normal closure means; Devices for temporary replacement of parts of valves for the same purpose
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media87.jpg

{Damping of valve members}
Definition statement

This place covers:

Feature that slows, cushions movement or reduces oscillation of a valve member.

References
Informative references

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

Dampers, per se

F16F

Special rules of classification

Devices for preventing water hammer or noise should also be classified in F16K 47/02 – F16K 47/026.

Electromagnetically actuated valves should also be classified in F16K 31/0696, as applicable.

{by means of a dashpot}
Definition statement

This place covers:

Valves provided with a dashpot to prevent or reduce chattering or hunting of the valve member or to dampen the opening and/or closing of the valve member.

Illustrative example of subject matter classified in this group.

media196.png

{the valve members comprising a plunger sliding within a fixed dashpot}
Definition statement

This place covers:

A movable plunger (comprising the valve member) slides within a fixed dashpot.

Illustrative example of subject matter classified in this group.

media197.png

{the valve members comprising a dashpot sliding over a fixed plunger}
Definition statement

This place covers:

A movable dashpot (comprising the valve member) slides over a fixed plunger.

Illustrative example of subject matter classified in this group.

media199.png

{by means of a resilient damping element}
Definition statement

This place covers:

Valves provided with a resilient damping means to prevent or reduce chattering or hunting of the valve or to dampen the opening and/or closing of the valve member.

Illustrative examples of subject matter classified in this group.

media200.png

media201.png

media202.png

for preventing water-hammer or noise
Definition statement

This place covers:

Valves with arrangements for the specific purpose of reducing water-hammer or noise.

{for preventing water-hammer, e.g. damping of the valve movement}
Definition statement

This place covers:

Damping for the specific purpose of reducing water-hammer.

Illustrative example of subject matter classified in this group.

media203.jpg

{preventing noise in a single handle mixing valve}
Definition statement

This place covers:

Arrangements for preventing noise in single handle mixing valves.

Illustrative example of subject matter classified in this group.

media204.png

Other details not peculiar to particular types of valves or cut-off apparatus
References
Informative references

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

Housings

F16K 27/07

Subject matter not provided for in other groups of this subclass
References
Informative references

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

Microvalves

F16K 99/0001

{Microvalves (microdevices B81B 1/00; manufacture or treatment of devices or systems in or on a substrate B81C 1/00; microfluidic structures B01L 3/5027; micropumps F04B 19/006)}
Relationships with other classification places

B01F 33/30 - Micromixers.

B01L 3/00 - Containers or dishes for laboratory use.

B81B 1/00 - Microcapillary devices in general.

B81B 7/00 - Microstructural systems (Auxiliary parts of microstructural devices or systems.)

B81C 1/00 - Microstructural technology.

B01J 19/0093 - Microreactors.

F04B 19/006 - Micropumps.

F04B 43/043 - Membrane micropumps.

G01N 27/447 - Electrophoresis for analysis in microdevices.

See also: B81B 2201/054 - Microvalves, B81B 2203/0127 - Diaphragms, membranes for microelectromechanical structures.

Means for compensation of misalignment between seat and closure member
Special rules of classification

In the case where both the closure member and seat are self-aligning, classification should be given in both F16K 2200/101 and F16K 2200/102.

closure member self-aligning to seat
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media205.png

media206.jpg

seat self-aligning to closure member
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media207.jpg

Common housing having a single inlet, a single outlet and multiple valve members
Definition statement

This place covers:

Devices classified in this group have a single inlet and a single outlet.

Multi-port and multi-way valves are not classified in this group.

Illustrative example of subject matter classified in this group.

media208.png

References
Informative references

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

Plurality of pivoted valve members

F16K 1/165, F16K 1/2021, F16K 1/223

Double-seat lift valves

F16K 1/44

Second valve for limiting the maximum flow rate of a lift valve

F16K 1/526

Sliding valves having two or more gates

F16K 3/029

Check valves having a plurality of hinged valve members

F16K 15/035

Check valves having a plurality of balls

F16K 15/042

Check valves having a plurality of stem guided valve members

F16K 15/066

Check valves having a plurality of flexible valve members

F16K 15/1401

Combined check valves and actuated valves

F16K 15/184

Auxiliary valve for relieving pressure on sealing faces of lift valves

F16K 39/024, F16K 39/026

Auxiliary closure means in valves

F16K 43/00

Special rules of classification

Multi-way valves do not belong in this subgroup and should be classified in F16K 11/10.

Also, dual flap pivot valves as shown below should not be classified here, but in F16K 15/036 - F16K 15/038.

media90.png

of diverse type, size or shape
Definition statement

This place covers:

Devices in which the valves are of different types, e.g. disc valves and ball valves, or are of different size so that they operate at different pressures.

Illustrative example of subject matter classified in this group.

media91.png

one valve arranged inside of the valve member of a second valve, e.g. nested valve members
Definition statement

This place covers:

Devices in which one of the valves carries the seat for at least one other valve, and also serves as the support for the other valve.

Illustrative example of subject matter classified in this group.

media92.png

References
Informative references

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

Auxiliary valve on main lift valve for relieving pressure on sealing faces

F16K 39/024

in parallel
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media93.png

in series
Definition statement

This place covers:

Illustrative example of subject matter classified in this group.

media91.png

Spring arrangements
Definition statement

This place covers:

The spring may be any type of resilient element.

Illustrative example of subject matter classified in this group.

media94.png

media95.png

References
Informative references

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

Springs in general

F16F

Common spring for multiple closure members
Definition statement

This place covers:

A single spring biasing a plurality of closure members.

Illustrative example of subject matter classified in this group.

media96.png

Plurality of biasing means, e.g. springs, for opening or closing single valve member
Definition statement

This place covers:

Valves in which the plural springs bias the single valve member open or closed.

Illustrative example of subject matter classified in this group.

media97.png

References
Informative references

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

Pressure relief valves with more than one spring

F16K 17/044

Means for protecting the spring in the fluid flow path
Definition statement

This place covers:

The spring must be in the flow path of the fluid, and the means for protecting the spring must prevent or reduce the impingement of the fluid on the spring.

Illustrative example of subject matter classified in this group.

media98.png

media99.png

Adjustable spring pre-loading
Definition statement

This place covers:

Valves provided with means adjusting the preload of the biasing means, usually in terms of the pressure at which the valve will open. In devices classified in this group, only the preload is adjustable. The spring rate of the spring is not modified.

Illustrative example of subject matter classified in this group.

media101.png

References
Informative references

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

Pressure relief valve with arrangement for adjusting the opening pressure

F16K 17/06

Constructional features of springs
Definition statement

This place covers:

Valves with spring arrangements of non-conventional type.

References
Informative references

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

Ball check valve with a spring other than a helicoidal spring

F16K 15/046

Stem guided check valve with a spring other than a helicoidal spring

F16K 15/064

Pressure relief valve with a spring other than a helicoidal spring

F16K 17/0493

Generally flat springs
Definition statement

This place covers:

Springs that are generally planar in the uncompressed state.

media102.png

Magnetically operated valve with spider armature

Cantilever springs
Definition statement

This place covers:

At least a portion of the spring projects along a plane extending from one or more attachment points.

Illustrative example of subject matter classified in this group.

media103.png

Actuating mechanism for a rolling ball valve

Helicoidal springs of variable pitch, diameter or spring rate
Definition statement

This place covers:

Spring includes a pitch, diameter or spring rate value that is not constant.

Illustrative example of subject matter classified in this group.

media104.jpg

Bleeding means in closed position of the valve, e.g. bleeding passages
Definition statement

This place covers:

Valves provided with at least one passage for allowing a limited amount of fluid to flow through the valve when the valve is in the closed position, including details of leak passages.

Special rules of classification

For purposes of classification, bypass lines for pilot pressure actuated valves should not be classified in this subgroup but in F16K 31/36 or F16K 31/42 and respective subgroups.

For purposes of classification, fluid-delivery valves providing a continuous small flow should not be classified in this subgroup but in F16K 21/02 only.

For purposes of classification, valves provided with a bypass for relieving the pressure on the sealing faces should not be classified in this subgroup but in F16K 39/00 and respective subgroups.

arranged on the closure member
Definition statement

This place covers:

Valves provided with at least one passage arranged on the closure member for allowing a limited amount of fluid to flow through the valve when the valve is in the closed position.

Illustrative example of subject matter classified in this group.

media105.png

Bleeding passage 68 provided on closure member

arranged on the valve housing or seat
Definition statement

This place covers:

Valves provided with at least one passage arranged on the valve housing or seat for allowing a limited amount of fluid to flow through the valve when the valve is in the closed position.

Illustrative example of subject matter classified in this group.

media106.png

Bleeding passage 68 provided on seat/housing 20.

Self-contained valve assemblies
Definition statement

This place covers:

Valve assemblies with most or all of its components housed in a separate housing that are then inserted into the valve housing.

media107.png

Cartridge valve 10 is inserted into housing 12

Cartridge valves
Definition statement

This place covers:

A valve assembly contained within a housing, which is usually replaceable and designed to permit ready insertion or removal into another housing or manifold.

Illustrative example of subject matter classified in this group.

media108.png

media109.png

Cages for valves, i.e. means to be inserted within the valve housing, surrounding and guiding the closure member
Definition statement

This place covers:

Valves provided with a separate housing component (i.e. cage) that is inserted within the valve housing and with said cage surrounding and guiding the closure member.

Illustrative example of subject matter classified in this group.

media110.png

Cage 14 guides closure member 13.

media112.png

Special rules of classification

For purposes of classification, cages or trim with a throttle for decreasing pressure or noise should not be classified in this subgroup but in F16K 47/00.