1. CPC Sections
  2. CPC Section F
  3. CPC Class F02
  4. CPC Subclass F02F
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CPC
COOPERATIVE PATENT CLASSIFICATION
​
F02F
CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES [2021-01]
NOTES

  • Attention is drawn to the notes preceding class F01.
  • In considering the relationship between class F16 and subclass F02F, class F16 will take precedence unless the subject-matter is specific to combustion engines.
F02F 1/00
Cylinders; Cylinder heads  [2021-01]
F02F 1/002
.
{Integrally formed cylinders and cylinder heads} [2013-01]
F02F 1/004
.
{Cylinder liners (F02F 1/08, F02F 1/16 take precedence)} [2013-01]
F02F 2001/006
.
{having a ring at the inside of a liner or cylinder for preventing the deposit of carbon oil particles, e.g. oil scrapers} [2013-01]
F02F 2001/008
.
{Stress problems, especially related to thermal stress} [2013-01]
F02F 1/02
.
having cooling means (cylinder heads F02F 1/26) [2013-01]
F02F 1/04
. .
for air cooling [2013-01]
F02F 1/045
. . .
{Attachment of cylinders to crankcase} [2013-01]
F02F 1/06
. . .
Shape or arrangement of cooling fins; Finned cylinders [2013-01]
F02F 1/065
. . . .
{with means for directing or distributing cooling medium} [2013-01]
F02F 1/08
. . . .
running-liner and cooling-part of cylinder being different parts or of different material [2013-01]
F02F 1/10
. .
for liquid cooling [2013-01]
F02F 1/102
. . .
{Attachment of cylinders to crankcase} [2013-01]
F02F 2001/104
. . .
{using an open deck, i.e. the water jacket is open at the block top face} [2013-01]
F02F 2001/106
. . .
{using a closed deck, i.e. the water jacket is not open at the block top face} [2013-01]
F02F 1/108
. . .
{Siamese-type cylinders, i.e. cylinders cast together} [2013-01]
F02F 1/12
. . .
Preventing corrosion of liquid-swept surfaces [2013-01]
F02F 1/14
. . .
Cylinders with means for directing, guiding or distributing liquid stream [2013-01]
F02F 1/16
. . .
Cylinder liners of wet type [2013-01]
F02F 1/163
. . . .
{the liner being midsupported} [2013-01]
F02F 1/166
. . . .
{Spacer decks} [2013-01]
F02F 1/18
.
Other cylinders [2013-01]
F02F 1/183
. .
{Oval or square cylinders} [2013-01]
F02F 1/186
. .
{for use in engines with two or more pistons reciprocating within same cylinder} [2021-01]
F02F 1/20
. .
characterised by constructional features providing for lubrication [2013-01]
F02F 1/22
. .
characterised by having ports in cylinder wall for scavenging or charging [2013-01]
F02F 1/24
.
Cylinder heads [2013-01]
F02F 2001/241
. .
{specially adapted to pent roof shape of the combustion chamber} [2013-01]
F02F 1/242
. .
{Arrangement of spark plugs or injectors} [2013-01]
F02F 1/243
. .
{Cylinder heads and inlet or exhaust manifolds integrally cast together} [2013-01]
F02F 2001/244
. .
{Arrangement of valve stems in cylinder heads} [2013-01]
F02F 2001/245
. . .
{the valve stems being orientated at an angle with the cylinder axis} [2013-01]
F02F 2001/246
. . . .
{and orientated radially from the combustion chamber surface} [2013-01]
F02F 2001/247
. . .
{the valve stems being orientated in parallel with the cylinder axis} [2013-01]
F02F 2001/248
. .
{Methods for avoiding thermal stress-induced cracks in the zone between valve seat openings} [2013-01]
F02F 2001/249
. .
{with flame plate, e.g. insert in the cylinder head used as a thermal insulation between cylinder head and combustion chamber} [2013-01]
F02F 1/26
. .
having cooling means [2013-01]
F02F 1/28
. . .
for air cooling [2013-01]
F02F 1/30
. . . .
Finned cylinder heads [2013-01]
F02F 1/305
. . . . .
{the cylinder heads being of side valve type} [2013-01]
F02F 1/32
. . . . .
the cylinder heads being of overhead valve type [2013-01]
F02F 1/34
. . . . .
with means for directing or distributing cooling medium  [2021-01]
F02F 1/36
. . .
for liquid cooling [2013-01]
F02F 1/365
. . . .
{the cylinder heads being of side valve type} [2013-01]
F02F 1/38
. . . .
the cylinder heads being of overhead valve type [2013-01]
F02F 1/40
. . . .
cylinder heads with means for directing, guiding, or distributing liquid stream  [2021-01]
F02F 1/42
. .
Shape or arrangement of intake or exhaust channels in cylinder heads [2013-01]
F02F 2001/4207
. . .
{Arrangements with one conduit connected with two valves; Arrangements connecting one valve with two conduits} [2013-01]
F02F 1/4214
. . .
{specially adapted for four or more valves per cylinder} [2013-01]
F02F 1/4221
. . . .
{particularly for three or more inlet valves} [2021-01]
F02F 1/4228
. . .
{Helically-shaped channels  (imparting a rotation to the charge in the cylinder F02B 31/00)} [2021-01]
F02F 1/4235
. . .
{of intake channels} [2013-01]
F02F 1/4242
. . . .
{with a partition wall inside the channel} [2013-01]
F02F 1/425
. . . .
{with a separate deviation element inside the channel} [2013-01]
F02F 1/4257
. . . .
{with an intake liner} [2013-01]
F02F 1/4264
. . .
{of exhaust channels} [2013-01]
F02F 1/4271
. . . .
{with an exhaust liner} [2013-01]
F02F 2001/4278
. . . .
{Exhaust collectors} [2013-01]
F02F 1/4285
. . .
{of both intake and exhaust channel} [2013-01]
F02F 1/4292
. . . .
{with liners (F02F 1/4257, F02F 1/4271 take precedence)} [2013-01]
F02F 3/00
Pistons  [2021-01]
F02F 2003/0007
.
{Monolithic pistons; One piece constructions; Casting of pistons} [2013-01]
F02F 3/0015
.
{Multi-part pistons} [2013-01]
F02F 3/0023
. .
{the parts being bolted or screwed together} [2013-01]
F02F 3/003
. .
{the parts being connected by casting, brazing, welding or clamping} [2013-01]
F02F 2003/0038
. . .
{by brazing} [2013-01]
F02F 2003/0046
. . .
{by crimping} [2013-01]
F02F 2003/0053
. . .
{by soldering} [2013-01]
F02F 2003/0061
. . .
{by welding} [2013-01]
F02F 3/0069
. .
{the crown and skirt being interconnected by the gudgeon pin} [2013-01]
F02F 3/0076
.
{the inside of the pistons being provided with ribs or fins} [2013-01]
F02F 3/0084
.
{the pistons being constructed from specific materials} [2013-01]
F02F 3/0092
. .
{the material being steel-plate} [2013-01]
F02F 3/02
.
having means for accommodating or controlling heat expansion [2017-05]
F02F 3/022
. .
{the pistons having an oval circumference or non-cylindrical shaped skirts, e.g. oval (F02F 3/025, F02F 3/027 take precedence)} [2013-01]
F02F 3/025
. .
{having circumferentially slotted piston skirts, e.g. T-slots} [2013-01]
F02F 3/027
. .
{the skirt wall having cavities} [2013-01]
F02F 3/04
. .
having expansion-controlling inserts [2013-01]
F02F 3/042
. . .
{the inserts consisting of reinforcements in the skirt interconnecting separate wall parts, e.g. rods or strips} [2013-01]
F02F 3/045
. . .
{the inserts being located in the crown} [2013-01]
F02F 3/047
. . .
{the inserts being located around the gudgeon pin bearings} [2013-01]
F02F 3/06
. . .
the inserts having bimetallic effect [2013-01]
F02F 3/08
. . .
the inserts being ring-shaped [2013-01]
F02F 3/10
.
having surface coverings (F02F 3/02 takes precedence) [2013-01]
F02F 3/105
. .
{the coverings forming a double skirt} [2013-01]
F02F 3/12
. .
on piston heads [2013-01]
F02F 3/14
. . .
within combustion chambers [2013-01]
F02F 3/16
.
having cooling means [2013-01]
F02F 3/18
. .
the means being a liquid or solid coolant, e.g. sodium, in a closed chamber in piston [2013-01]
F02F 3/20
. .
the means being a fluid flowing through or along piston [2013-01]
F02F 3/22
. . .
the fluid being liquid [2013-01]
F02F 3/225
. . . .
{the liquid being directed into blind holes} [2013-01]
F02F 3/24
.
having means for guiding gases in cylinders, e.g. for guiding scavenging charge in two-stroke engines [2013-01]
F02F 3/26
.
having combustion chamber in piston head (the surface thereof being covered F02F 3/14) [2013-01]
F02F 3/28
.
Other pistons with specially-shaped head [2013-01]
F02F 3/285
. .
{the head being provided with an insert located in or on the combustion-gas-swept surface} [2013-01]
F02F 5/00
Piston rings, e.g. associated with piston crown {(not used see F16J 9/00)} [2013-01]
F02F 7/00
Casings, e.g. crankcases {or frames} [2021-01]
F02F 7/0002
.
{Cylinder arrangements} [2013-01]
F02F 7/0004
. .
{Crankcases of one-cylinder engines} [2013-01]
F02F 7/0007
. .
{Crankcases of engines with cylinders in line} [2013-01]
F02F 7/0009
. .
{Crankcases of opposed piston engines} [2013-01]
F02F 7/0012
. .
{Crankcases of V-engines} [2013-01]
F02F 7/0014
. .
{Crankcases of W-, deldic, or quadratic engines, or the like} [2013-01]
F02F 7/0017
. .
{Crankcases of radial engines} [2013-01]
F02F 7/0019
. .
{Cylinders and crankshaft not in one plane (deaxation)} [2013-01]
F02F 7/0021
.
{Construction} [2013-01]
F02F 7/0024
. .
{Casings for larger engines} [2013-01]
F02F 7/0026
. . .
{Casings for horizontal engines} [2013-01]
F02F 7/0029
. .
{Space-frames} [2013-01]
F02F 7/0031
. .
{Construction kit principle (modular engines)} [2013-01]
F02F 7/0034
. .
{Built from sheet material and welded casings} [2013-01]
F02F 7/0036
. .
{Casings for two-stroke engines with scavenging conduits} [2013-01]
F02F 7/0039
. .
{Casings for small engines, especially with crankcase pumps} [2013-01]
F02F 2007/0041
. .
{Fixing Bolts} [2013-01]
F02F 7/0043
.
{Arrangements of mechanical drive elements} [2013-01]
F02F 7/0046
. .
{Shape of casings adapted to facilitate fitting or dismantling of engine parts} [2013-01]
F02F 7/0048
. .
{Tunnel-type frames} [2013-01]
F02F 7/0051
. .
{Crankcase pump engines} [2013-01]
F02F 7/0053
. .
{Crankshaft bearings fitted in the crankcase} [2013-01]
F02F 2007/0056
. . .
{using bearing beams, i.e. bearings interconnected by a beam or multiple beams} [2013-01]
F02F 7/0058
. .
{Longitudinally or transversely separable crankcases} [2017-05]
F02F 7/006
.
{Camshaft or pushrod housings} [2021-01]
F02F 2007/0063
. .
{Head bolts; Arrangements of cylinder head bolts} [2013-01]
F02F 7/0065
.
{Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety} [2013-01]
F02F 7/0068
. .
{Adaptations for other accessories} [2013-01]
F02F 7/007
. .
{Adaptations for cooling} [2013-01]
F02F 7/0073
. .
{Adaptations for fitting the engine, e.g. front-plates or bell-housings} [2013-01]
F02F 2007/0075
. . .
{Front covers} [2013-01]
F02F 2007/0078
. . .
{Covers for belt transmissions} [2013-01]
F02F 7/008
. .
{Sound insulation} [2021-01]
F02F 7/0082
.
{Mounting of engine casings} [2013-01]
F02F 7/0085
.
{Materials for constructing engines or their parts} [2013-01]
F02F 7/0087
. .
{Ceramic materials} [2013-01]
F02F 2007/009
. .
{Hypereutectic aluminum, e.g. aluminum alloys with high SI content} [2013-01]
F02F 2007/0092
. .
{Transparent materials} [2013-01]
F02F 7/0095
.
{Constructing engine casings (welded casings F02F 7/0034)} [2013-01]
F02F 2007/0097
.
{for large diesel engines} [2013-01]
F02F 11/00
Arrangements of sealings in combustion engines  (piston rings  {F16J 9/00}) [2021-01]
F02F 11/002
.
{involving cylinder heads} [2013-01]
F02F 11/005
.
{involving cylinder liners} [2013-01]
F02F 11/007
.
{involving rotary applications} [2013-01]
F02F 2200/00
Manufacturing [2013-01]
F02F 2200/02
.
Riveting [2013-01]
F02F 2200/04
.
Forging of engine parts [2013-01]
F02F 2200/06
.
Casting [2024-08]
F02F 2200/08
. .
using a lost model, e.g. foam casting [2013-01]
F02F 2200/11
.
using wrought materials, e.g. wrought steels [2013-01]