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CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES ( specially adapted for rotary-piston or oscillating-piston internal-combustion engines F02B ; specially adapted for gas-turbine plants F02C ; specially adapted for jet-propulsion plants F02K)
Cylinders; Cylinder heads ( in general F16J)
Definition statement
This subclass/group covers:

Cylinders and cylinder heads for combustion engines

References relevant to classification in this group
This subclass/group does not cover:
Cylinders and cylinder heads in general
{Integrally formed cylinders and cylinder heads}
Definition statement
This subclass/group covers:

All applications of a single piece forming the cylinder and the cylinder head.

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having cooling means ( cylinder heads F02F 1/26)
Informative references
Attention is drawn to the following places, which may be of interest for search:
Cooling of cylinders or cylinder heads in general
for air cooling
Definition statement
This subclass/group covers:

Means for air cooling of cylinder heads

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Air cooling of cylinders and cylinder heads
running-liner and cooling-part of cylinder being different parts or of different material
Definition statement
This subclass/group covers:

Running-liner and cooling-part of cylinder being different parts or of different material:

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Only for air cooled engines, e.g. different materials used for the liners and the cooling fins.

for liquid cooling
Informative references
Attention is drawn to the following places, which may be of interest for search:
Liquid cooling of cylinders and cylinder heads
{Attachment of cylinders to crankcase}
Definition statement
This subclass/group covers:

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{Siamese-type cylinders, i.e. cylinders cast together}
Definition statement
This subclass/group covers:

Siamese-type cylinders, i.e. cylinders cast together:

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Arrangement for cooling cylinders or cylinder heads
Preventing corrosion of liquid-swept surfaces
Definition statement
This subclass/group covers:

All measures taken for combating corrosion in water cooled engines.

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Engines with means for preventing corrosions of gas swept spaces
{with a separate deviation element inside the channel}
Definition statement
This subclass/group covers:

Separate deviation element inside the intake channel. E.g. a butterfly valve or an insert placed just before the valve seat.

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{with liners (F02F 1/4257 , F02F 1/4271 take precedence ) }
Definition statement
This subclass/group covers:

Liners in both intake and exhaust channel.

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References relevant to classification in this group
This subclass/group does not cover:
Liners in intake channels only
Liners in exhaust channels only
Pistons ( in general F16J)
Definition statement
This subclass/group covers:

Pistons for combustion engines:

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Pistons in general
having cooling means
Definition statement
This subclass/group covers:

Structural features, e.g. fins, apertures and arrangements for dissipating heat

Informative references
Attention is drawn to the following places, which may be of interest for search:
Liquid cooling arrangements for pistons
Air cooling arrangements for pistons
the fluid being liquid
Definition statement
This subclass/group covers:

Liquid cooling means:

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Synonyms and Keywords

In patent documents the following expressions/words"cooling channel cover" and "ring carrier" are often used as synonyms.

Piston rings, e.g. associated with piston crown { not used see F16J 9/00}
References relevant to classification in this group
This subclass/group does not cover:
Piston rings
Special rules of classification within this subclass/group

Not used

Casings, e.g. crankcases ( engine casings in general F16M) {or frames}
Definition statement
This subclass/group covers:

Combustion engine casings, e.g. crankcases or frames, e.g. rigid supports for cylinders or crankcases.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Engine casings in general
Arrangements of sealings in combustion engines ( piston rings F02F 5/00 { not used, see F16J 9/00} ; sealings per se F16J)
Definition statement
This subclass/group covers:

Arrangement of sealings in combustion engines

References relevant to classification in this group
This subclass/group does not cover:
Piston rings for combustion engines
Sealings per se
This page is owned by Office of Patent Classification.
Last Modified: 10/11/2013