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CPC Definition - Subclass F16J

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Last Updated Version: 2022.01
F16J
PISTONS {(specially adapted for dampers F16F 9/32)}; CYLINDERS; SEALINGS
Definition statement

This place covers:

  • Pistons, i.e. moving components for transferring a force to or from a fluid
  • Cylinders, i.e. chambers in which a piston travels
  • Pressure vessels, i.e. enclosure to seal fluid from the environment
  • Sealings, i.e. barriers for preventing fluid leakage
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:

Pressure cookers

A47J 27/08

Sealing arrangements for vehicle windows, windscreens, non-fixed roofs, doors, or similar devices

B60J 10/00

Sealing or packing elements for container closures

B65D 53/00

Sealing building joints

E04B 1/66

Sealing arrangements on wings or parts co-operating with wings

E06B 7/16

Machines or engines of reciprocating type

F01B

Sealing arrangements in rotary-piston machines or engines

F01C 19/00

Sealings in non-positive-displacement machines or engines

F01D 11/00

Cylinders of combustion engines

F02F 1/00

Pistons for combustion engines

F02F 3/00

Arrangements of sealings in combustion engines

F02F 11/00

Sealing arrangements in rotary-piston pumps

F04C 27/00

Sealings of non-positive displacement pumps

F04D 29/08

Sealings for bearings

F16C 33/72

Pistons specially adapted for dampers

F16F 9/32

Sealing devices for sliding parts of gas holders of variable capacity

F17B 1/04

Arrangements for sealing elements into header boxes or end plates of heat exchangers

F28F 9/04

Sealing lead-in or lead-through insulators

H01B 17/30

Pistons; Trunk pistons; Plungers (bellows pistons F16J 3/06; piston-rings or seats therefor F16J 9/00; {manufacture of pistons B23P 15/10}; rotary pistons, e.g. for "Wankel" type engines F01C; specific for combustion engines, i.e. constructed to withstand high temperature or modified for guiding, igniting, vaporising or otherwise treating the charge F02F; {pistons for hydraulic engines F03C}; pumps F04B; floats F16K 33/00)
Definition statement

This place covers:

Pistons not specific to a particular use.

References
Limiting references

This place does not cover:

Rotary pistons, e.g. for "Wankel" type engines

F01C

Pistons for hydraulic engines

F03C

Pumps

F04B

Floats

F16K 33/00

Informative references

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

Bellows pistons

F16J 3/06

Piston-rings or seats therefore

F16J 9/00

Manufacture of pistons

B23P 15/10

Diaphragms; Bellows; Bellows pistons (connection of valves to inflatable elastic bodies B60C 29/00; bellows or the like used in instruments G12B 1/04; diaphragms for electromechanical transducers H04R 7/00)
Definition statement

This place covers:

Diaphragm, bellows and bellow pistons not specific to a particular use

References
Informative references

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

Connection of valves to inflatable elastic bodies

B60C 29/00

Bellows or the like used in instruments

G12B 1/04

Diaphragms for electromechanical transducers

H04R 7/00

Piston-rods
Definition statement

This place covers:

Piston-rods not specific to a particular use

Piston-rings {, e.g. non-metallic piston-rings}, seats therefor; Ring sealings of similar construction (other sealings between pistons and cylinders F16J 3/06, F16J 15/16 {; manufacture of piston-rings B23P 15/06, B23P 15/08}; tools for mounting or removing piston-rings or the like B25B; piston sealing arrangements on brake master cylinders B60T 11/236 {; sealing provided on pump pistons F04B 53/143})
Definition statement

This place covers:

Piston-rings or piston-ring expanders metallic or non-metallic; Seats therefore

References
Limiting references

This place does not cover:

Ring sealing of similar construction in general also when used between pistons and cylinders

F16J 3/06, F16J 15/16

Informative references

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

Manufacture of piston-rings

B23P 15/06, B23P 15/08

Tools for mounting or removing piston-rings or the like

B25B

Sealing arrangement on brake master cylinder

B60T 11/236

Sealing provided on pump pistons

F04B 53/143

Special rules of classification

Piston rings specific for combustion engines are classified in F16J 9/00 not in F02F 5/00

Engine or like cylinders (pressure vessels in general F16J 12/00; cylinders for engines or other apparatus of particular kinds, see the appropriate subclasses, e.g. for combustion engines F02F); Features of hollow, e.g. cylindrical, bodies in general
References
Informative references

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

Pressure vessels in general

F16J 12/00

Cylinders for engines or other apparatus of particular kinds, see the appropriate subclasses, e.g. for combustion engines

F02F

Pressure vessels in general (covers therefor F16J 13/00; for particular applications, see the relevant subclasses, e.g. B01J, F17C, G21C)
References
Limiting references

This place does not cover:

Covers for pressure vessels

F16J 13/00

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:

Pressure vessels, or vacuum vessels for chemical or physical processes having closure members or seals specially adapted therefor

B01J 3/03

Pressure vessels for chemical or physical processes, e.g. autoclaves

B01J 3/04

Pressure vessels for containing or storing compressed, liquefied or solidified gases

F17C

Nuclear pressure vessels

G21C 13/00

Covers or similar closure members for pressure vessels in general (for engines or like cylinders F16J 10/00; sealings F16J 15/02; covers for box-like containers B65D 43/00; devices for securing or retaining closure members B65D 45/00; closures for containers not otherwise provided for B65D 51/00; manholes, covers for large containers B65D 90/10; gates or closures for large containers B65D 90/54; for vessels for containing or storing compressed, liquefied or solidified gases F17C 13/06; steam boilers F22B)
References
Informative references

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

For engines or like cylinder

F16J 10/00

Sealings

F16J 15/02

Covers for box-like containers

B65D 43/00

Devices for securing or retaining closures members

B65D 45/00

Closures for containers not otherwise provided for

B65D 51/00

Manholes, covers for large containers

B65D 90/10

Gates or closures for large containers

B65D 90/54

For vessels storing compressed, liquefied or solidified gasses

F17C 13/06

Steam boilers

F22B 5/00 - F22B 31/00

Sealings
Definition statement

This place covers:

Sealing means that acts at a joint or juncture of adjacent parts

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:

Sealing arrangements for vehicle windows, windscreens, non-fixed roofs, doors, or similar devices

B60J 10/00

Sealing or packing elements for container closures

B65D 53/00

Sealing building joints

E04B 1/66

Sealing arrangements on wings or parts co-operating with wings

E06B 7/16

Sealing arrangements in rotary-piston machines or engines

F01C 19/00

Sealings in non-positive-displacement machines or engines

F01D 11/00

Arrangements or sealings in combustion engines

F02F 11/00

Sealing and arrangements in rotary-piston pumps

F04C 27/00

Sealing of non-positive displacement pumps

F04D 29/08

Sealings for bearings

F16C 33/72

Spindle sealings for valves

F16K 41/00

Sealing devices for sliding parts of gas holders of variable capacity

F17B 1/04

Arrangements for sealing elements into header boxes or end plates of heat-exchangers

F28F 9/04

Sealing lead-in or lead-through insulators

H01B 17/30

{comprising at least two sealings in succession (F16J 15/162, F16J 15/40 take precedence)}
References
Limiting references

This place does not cover:

Special parts or details relating to lubrication or cooling of the sealing itself

F16J 15/162

Sealings by means of fluid

F16J 15/40

{with division of the pressure (F16J 15/44 takes precedence)}
References
Limiting references

This place does not cover:

Free-space packings

F16J 15/44

between relatively-stationary surfaces (F16J 15/46, F16J 15/48 take precedence)
References
Limiting references

This place does not cover:

Sealings with packing ring expanded or pressed into place by fluid pressure

F16J 15/46

Sealings influenced by the pressure within the member to be sealed

F16J 15/48

{with elastic packing (F16J 15/08 takes precedence)}
References
Limiting references

This place does not cover:

Sealings with exclusively metal packing

F16J 15/08

{with positioning means (F16J 15/0831 takes precedence)}
References
Limiting references

This place does not cover:

Flat gasket with mounting aids

F16J 15/0831

between relatively-moving surfaces (F16J 15/50, F16J 15/52 take precedence; bellows pistons F16J 3/06; piston-rings or ring sealings of similar construction F16J 9/00)
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:

Bellows pistons

F16J 3/06

Piston-rings or ring sealing of similar construction

F16J 9/00

Sealings between relatively-movable members, by means of a sealing without relatively-moving surfaces

F16J 15/50

Sealings by means of sealing bellows or diaphragms

F16J 15/52

Sealings for bearings

F16C 33/72

Spindle sealings for valves

F16K 41/00

{Special parts or details relating to lubrication or cooling of the sealing itself (F16J 15/324, F16J 15/3404, F16J 15/40 take precedence)}
References
Limiting references

This place does not cover:

Details relating to lubrication or cooling of the sealing itself

F16J 15/324

Sealings and characterised by parts or details relating to lubrication, cooling or venting of the seal

F16J 15/3404

Sealings by means of fluid

F16J 15/40

with elastic sealings, e.g. O-rings
References
Limiting references

This place does not cover:

Sealings with slip-ring pressed against a more or less radial face on one member

F16J 15/34

Glossary of terms

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

Lip

any flexible tapered or rounded part contacting the surface to be sealed e.g. O-ring

having two or more lips
References
Limiting references

This place does not cover:

Sealings provided with a spring-tension element

F16J 15/3208

Sealings formed by deforming a flat annular ring

F16J 15/3228

Arrangements for lubrication or cooling of the sealing itself
References
Informative references

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

For seals other than lip seals

F16J 15/162

Manufacturing methods specially adapted for elastic sealings (moulding B29C)
References
Limiting references

This place does not cover:

Moulding

B29C

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:

Sealings produced by moulding

B29L 2031/26

Special methods of manufacture for sealings of bearings

F16C 33/7833

Arrangements for monitoring the condition or operation of elastic sealings (F16J 15/326 takes precedence); Arrangements for control of elastic sealings, e.g. of their geometry or stiffness
References
Limiting references

This place does not cover:

Sealings between relatively-moving surfaces with elastic sealings comprising two casing or support elements, one attached to each surface with means for detecting or measuring relative rotation of the two elements

F16J 15/326

{with cavities (F16J 15/3424 takes precedence)}
References
Limiting references

This place does not cover:

Sealings with microcavities

F16J 15/3424

characterised by the use of particular materials {(F16J 15/444 takes precedence)}
References
Limiting references

This place does not cover:

Sealings with facing materials having honeycomb-like structure

F16J 15/444

with packing ring expanded or pressed into place by fluid pressure, e.g. inflatable packings (connection of valves to inflatable elastic bodies B60C 29/00; {for sealing arrangements in vehicles B60J 10/244; for sealing arrangements of openings in buildings E06B 7/2318}; for tube connections F16L)
References
Informative references

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

Connection of valves to inflatable elastic bodies

B60C 29/00

For sealing arrangements in vehicles

B60J 10/244

For sealing arrangements of openings in buildings

E06B 7/2318

For tube connections

F16L 13/00 - F16L 49/00

by means of sealing bellows or diaphragms (connection of valves to inflatable elastic bodies B60C 29/00)
References
Informative references

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

Diaphragm or bellow itself

F16J 3/00

Connection of valves to inflatable elastic bodies

B60C 29/00