1. CPC Sections
  2. CPC Section F
  3. CPC Class F01
  4. CPC Subclass F01B
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CPC
COOPERATIVE PATENT CLASSIFICATION
​​
F01B
MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES (of rotary-piston or oscillating-piston type F01C; of non-positive-displacement type F01D; internal-combustion aspects of reciprocating-piston engines F02B 57/00, F02B 59/00; crankshafts, crossheads, connecting-rods F16C; flywheels F16F; gearings for interconverting rotary motion and reciprocating motion in general F16H; pistons, piston rods, cylinders, for engines in general F16J) [2018-08]
NOTES

  • This subclass covers, with the exception of the matter provided for in subclasses F01C - F01P :
    • engines for elastic fluids, e.g. steam engines;
    • engines for liquids and elastic fluids;
    • machines for elastic fluids;
    • machines for liquids and elastic fluids.
  • Attention is drawn to the note preceding class F01, especially as regards the definitions of "steam" and "special vapour".
WARNING

  • In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.
F01B 1/00
Reciprocating-piston machines or engines characterised by number or relative disposition of cylinders or by being built-up from separate cylinder-crankcase elements (F01B 3/00, F01B 5/00 take precedence) [2013-01]
F01B 1/01
.
with one single cylinder [2013-01]
F01B 1/02
.
with cylinders all in one line [2013-01]
F01B 1/04
.
with cylinders in V-arrangement [2013-01]
F01B 1/06
.
with cylinders in star or fan arrangement [2013-01]
F01B 1/0603
. .
{the connection of the pistons with an element being at the outer ends of the cylinders} [2013-01]
F01B 1/0606
. . .
{with cam-actuated distribution member(s)} [2013-01]
F01B 1/061
. . .
{with two or more series radial piston-cylinder units} [2013-01]
F01B 1/0613
. . . .
{directly located side by side} [2013-01]
F01B 1/0617
. . . .
{coupling of several cylinders-barrels} [2013-01]
F01B 1/062
. .
{the connection of the pistons with an actuating or actuated element being at the inner ends of the cylinders} [2013-01]
F01B 1/0624
. . .
{with cam-actuated distribution member(s)} [2013-01]
F01B 1/0627
. . . .
{each machine piston being provided with channels, which are coacting with the cylinder and are used as a distribution member for another piston-cylinder unit} [2013-01]
F01B 1/0631
. . .
{the piston-driving or -driven cam being provided with an inlet or an outlet} [2013-01]
F01B 1/0634
. . .
{with two or more series radial piston-cylinder units} [2013-01]
F01B 1/0637
. . . .
{directly located side by side} [2013-01]
F01B 1/0641
. .
{Details, component parts specially adapted for such machines} [2013-01]
F01B 1/0644
. . .
{Pistons} [2013-01]
F01B 1/0648
. . .
{Cams} [2013-01]
F01B 1/0651
. . . .
{consisting of several cylindrical elements, e.g. rollers} [2013-01]
F01B 1/0655
. . .
{cylinders} [2013-01]
F01B 1/0658
. . .
{Arrangements for pressing or connecting the pistons against the actuating or actuated cam} [2013-01]
F01B 1/0662
. . . .
{hydraulically} [2013-01]
F01B 1/0665
. . .
{Disconnecting the pistons from the actuating or actuated cam (in general F01B 31/24)} [2013-01]
F01B 1/0668
. . .
{Supporting and guiding means for the piston} [2013-01]
F01B 1/0672
. . .
{Draining of the machine housing; arrangements dealing with leakage fluid} [2018-01]
F01B 1/0675
. .
{Controlling} [2013-01]
F01B 1/0679
. . .
{by using a valve in a system with several pump or motor chambers, wherein the flow path through the chambers can be changed, e.g. series-parallel} [2013-01]
F01B 1/0682
. . .
{by changing the effective cross sectional piston working surface} [2013-01]
F01B 1/0686
. . .
{by changing the effective piston stroke} [2013-01]
F01B 1/0689
. . . .
{by changing the excentricity of one element relative to another element} [2013-01]
F01B 1/0693
. . .
{by changing the phase relationship between two actuating or actuated cams} [2013-01]
F01B 1/0696
. . .
{by changing the phase relationship between the actuating or actuated cam and the distributing means} [2013-01]
F01B 1/08
.
with cylinders arranged oppositely relative to main shaft and of "flat" type [2013-01]
F01B 1/10
.
with more than one main shaft, e.g. coupled to common output shaft (combinations of two or more machines or engines F01B 21/00) [2013-01]
F01B 1/12
.
Separate cylinder-crankcase elements coupled together to form a unit [2013-01]
F01B 3/00
Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis [2013-01]
F01B 3/0002
.
{having stationary cylinders} [2013-01]
F01B 3/0005
. .
{having two or more sets of cylinders or pistons} [2013-01]
F01B 3/0008
. .
{having self-acting distribution members, e.g. actuated by working fluid} [2013-01]
F01B 3/0011
. . .
{Cylindrical distribution members} [2013-01]
F01B 3/0014
. . .
{Conical distribution members} [2013-01]
F01B 3/0017
. .
{Component parts, details, e.g. sealings, lubrication} [2013-01]
F01B 3/002
. . .
{Cylinders} [2013-01]
F01B 3/0023
. . .
{Actuating or actuated elements} [2013-01]
F01B 3/0026
. . . .
{Actuating or actuated element bearing means or driving or driven axis bearing means} [2013-01]
F01B 3/0029
. . .
{Casings, housings} [2013-01]
F01B 3/0032
.
{having rotary cylinder block} [2013-01]
F01B 3/0035
. .
{having two or more sets of cylinders or pistons} [2013-01]
F01B 3/0038
. . .
{inclined to main shaft axis} [2013-01]
F01B 3/0041
. .
{Arrangements for pressing the cylinder barrel against the valve plate, e.g. fluid pressure} [2013-01]
F01B 3/0044
. .
{Component parts, details, e.g. valves, sealings, lubrication} [2013-01]
F01B 3/0047
. . .
{Particularities in the contacting area between cylinder barrel and valve plate} [2013-01]
F01B 3/005
. . . .
{Bearing arrangements} [2013-01]
F01B 3/0052
. . .
{Cylinder barrel} [2013-01]
F01B 3/0055
. . .
{Valve means, e.g. valve plate} [2013-01]
F01B 3/0058
. . . .
{Cylindrical valve means} [2013-01]
F01B 3/0061
. . . .
{Conical valve means} [2013-01]
F01B 3/0064
. . .
{Machine housing} [2013-01]
F01B 3/0067
. . . .
{cylinder barrel bearing means} [2013-01]
F01B 3/007
. . .
{Swash plate} [2013-01]
F01B 3/0073
. . . .
{swash plate bearing means or driving or driven axis bearing means} [2013-01]
F01B 3/0076
. .
{Connection between cylinder barrel and inclined swash plate} [2013-01]
F01B 3/0079
.
{having pistons with rotary and reciprocating motion, i.e. spinning pistons} [2013-01]
F01B 3/0082
.
{Details} [2013-01]
F01B 3/0085
. .
{Pistons} [2013-01]
F01B 3/0088
. . .
{Piston shoe retaining means} [2013-01]
F01B 3/0091
. .
{Casings, housings} [2013-01]
F01B 3/0094
. .
{Driving or driven means} [2013-01]
F01B 2003/0097
. . .
{Z-shafts, i.e. driven or driving shafts in Z-form} [2013-01]
F01B 3/02
.
with wobble-plate [2013-01]
F01B 3/04
.
the piston motion being transmitted by curved surfaces [2013-01]
F01B 3/045
. .
{by two or more curved surfaces, e.g. for two or more pistons in one cylinder} [2013-01]
F01B 3/06
. .
by multi-turn helical surfaces and automatic reversal [2013-01]
F01B 3/08
. . .
the helices being arranged on the pistons [2013-01]
F01B 3/10
.
Control of working-fluid admission or discharge peculiar thereto (suitable for more general application F01L) [2013-01]
F01B 3/101
. .
{for machines with stationary cylinders} [2013-01]
F01B 3/102
. . .
{Changing the piston stroke by changing the position of the swash plate} [2013-01]
F01B 3/103
. .
{for machines with rotary cylinder block} [2013-01]
F01B 3/104
. . .
{by turning the valve plate} [2013-01]
F01B 3/105
. . .
{by moving the swash plate in a direction perpendicular to the axis of rotation of the cylinder barrel} [2013-01]
F01B 3/106
. . .
{by changing the inclination of the swash plate} [2013-01]
F01B 3/107
. . . .
{using wedges} [2013-01]
F01B 3/108
. . .
{by turning the swash plate (with fixed inclination)} [2013-01]
F01B 3/109
. . .
{by changing the inclination of the axis of the cylinder barrel relative to the swash plate (F01B 3/106 takes precedence)} [2013-01]
F01B 5/00
Reciprocating-piston machines or engines with cylinder axes arranged substantially tangentially to a circle centred on main shaft axis [2013-01]
F01B 5/003
.
{the connection of the pistons with an actuated or actuating element being at the outer ends of the cylinders} [2013-01]
F01B 5/006
.
{the connection of the pistons with an actuated or actuating element being at the inner ends of the cylinders} [2013-01]
F01B 7/00
Machines or engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders (in opposite arrangement relative to main shaft F01B 1/08) [2013-01]
F01B 7/02
.
with oppositely reciprocating pistons [2013-01]
F01B 7/04
. .
acting on same main shaft [2013-01]
F01B 7/06
. . .
using only connecting-rods for conversion of reciprocatory into rotary motion or vice versa [2016-08]
F01B 7/08
. . . .
with side rods [2013-01]
F01B 7/10
. . . .
having piston-rod of one piston passed through other piston [2013-01]
F01B 7/12
. . .
using rockers and connecting-rods [2013-01]
F01B 7/14
. .
acting on different main shafts [2013-01]
F01B 7/16
.
with pistons synchronously moving in tandem arrangement [2013-01]
F01B 7/18
.
with differential piston (F01B 7/20 takes precedence) [2013-01]
F01B 7/20
.
with two or more pistons reciprocating one within another, e.g. one piston forming cylinder of the other [2013-01]
F01B 9/00
Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups (connections disengageable during idling F01B 31/24) [2013-01]
F01B 9/02
.
with crankshaft [2013-01]
F01B 9/023
. .
{of Bourke-type or Scotch yoke} [2013-01]
F01B 9/026
. .
{Rigid connections between piston and rod; Oscillating pistons} [2013-01]
F01B 9/04
.
with rotary main shaft other than crankshaft [2013-01]
F01B 9/042
. .
{the connections comprising gear transmissions} [2013-01]
F01B 2009/045
. . .
{Planetary gearings} [2013-01]
F01B 9/047
. .
{with rack and pinion} [2013-01]
F01B 9/06
. .
the piston motion being transmitted by curved surfaces [2013-01]
F01B 2009/061
. . .
{by cams} [2013-01]
F01B 2009/063
. . . .
{Mono-lobe cams} [2013-01]
F01B 2009/065
. . . .
{Bi-lobe cams} [2013-01]
F01B 2009/066
. . . .
{Tri-lobe cams} [2013-01]
F01B 2009/068
. . . .
{Quadri-lobe cams} [2013-01]
F01B 9/08
. .
with ratchet and pawl [2013-01]
F01B 11/00
Reciprocating-piston machines or engines without rotary main shaft, e.g. of free-piston type [2013-01]
F01B 11/001
.
{in which the movement in the two directions is obtained by one double acting piston motor} [2013-01]
F01B 11/002
. .
{one side of the double acting piston motor being always under the influence of the fluid under pressure} [2013-01]
F01B 11/003
. . .
{the fluid under pressure being continuously delivered to one motor chamber and reacting the other chamber through a valve located in the piston, to bring the piston back in its start-position} [2013-01]
F01B 11/004
.
{in which the movement in the two directions is obtained by two single acting piston motors, each acting in one direction} [2013-01]
F01B 2011/005
. .
{with oscillating pistons, i.e. the pistons are arranged in ring like cylinder sections and oscillate with respect to the center of the ring} [2013-01]
F01B 11/006
. .
{one single acting piston motor being always under the influence of the fluid under pressure} [2013-01]
F01B 11/007
.
{in which the movement in only one direction is obtained by a single acting piston motor, e.g. with actuation in the other direction by spring means} [2013-01]
F01B 11/008
. .
{with actuation in the other direction by gravity} [2013-01]
F01B 11/009
.
{in which the movement in two directions is obtained by two or more double acting piston motors} [2013-01]
F01B 11/02
.
Equalising or cushioning devices [2013-01]
F01B 11/04
.
Engines combined with reciprocatory driven devices, e.g. hammers (with pumps F01B 23/08) [2024-01]
F01B 11/06
. .
for generating vibration only [2013-01]
F01B 11/08
.
with direct fluid transmission link (F01B 11/02 takes precedence) [2013-01]
F01B 13/00
Reciprocating-piston machines or engines with rotating cylinders in order to obtain the reciprocating-piston motion (machines or engines of flexible-wall type F01B 19/00) [2013-01]
F01B 13/02
.
with one cylinder only [2013-01]
F01B 13/04
.
with more than one cylinder {(F01B 3/0032 takes precedence)} [2013-01]
F01B 13/045
. .
{with cylinder axes arranged substantially tangentially to a circle centred on main shaft axis} [2013-01]
F01B 13/06
. .
in star arrangement [2013-01]
F01B 13/061
. . .
{the connection of the pistons with the actuated or actuating element being at the outer ends of the cylinders} [2013-01]
F01B 13/062
. . . .
{cylinder block and actuating or actuated cam both rotating (F01B 13/064 and F01B 13/066 take precedence)} [2013-01]
F01B 13/063
. . . .
{with two or more series radial piston-cylinder units} [2013-01]
F01B 13/064
. . . . .
{cylinder block and actuating or actuated cam both rotating (F01B 13/066 takes precedence)} [2013-01]
F01B 13/065
. . . . .
{directly located side by side} [2013-01]
F01B 13/066
. . . . . .
{cylinder block and actuating or actuated cam both rotating} [2013-01]
F01B 13/067
. . . .
{with pistons and cylinders having two different parallel axis of rotation} [2013-01]
F01B 13/068
. . .
{the connection of the pistons with an actuated or actuating element being at the inner ends of the cylinders} [2013-01]
F01B 15/00
Reciprocating-piston machines or engines with movable cylinders other than provided for in group F01B 13/00 (with movable cylinder sleeves for working fluid control F01L) [2013-01]
F01B 15/002
.
{having cylinders in star or fan arrangement, the connection of the pistons with the actuated or actuating element being at the outer ends of the cylinders} [2013-01]
F01B 15/005
.
{having cylinders in star or fan arrangement, the connection of the pistons with the actuated or actuating element being at the inner ends of the cylinders} [2013-01]
F01B 15/007
.
{having spinning cylinders, i.e. the cylinders rotating about their longitudinal axis} [2013-01]
F01B 15/02
.
with reciprocating cylinders (with one piston within another F01B 7/20) [2013-01]
F01B 15/04
.
with oscillating cylinder [2013-01]
F01B 15/06
. .
Control of working-fluid admission or discharge peculiar thereto [2013-01]
F01B 15/065
. . .
{by cam-actuated distribution members} [2013-01]
F01B 17/00
Reciprocating-piston machines or engines characterised by use of uniflow principle [2013-01]
F01B 17/02
.
Engines [2013-01]
F01B 17/022
. .
{with fluid heating} [2013-01]
F01B 17/025
. .
{using liquid air} [2013-01]
F01B 17/027
. .
{using separators} [2013-01]
​
F01B 17/04
. .
Steam engines [2016-05]
NOTE

F01B 19/00
Positive-displacement machines or engines of flexible-wall type [2013-01]
F01B 19/02
.
with plate-like flexible members [2013-01]
F01B 19/04
.
with tubular flexible members [2013-01]
F01B 21/00
Combinations of two or more machines or engines (F01B 23/00 takes precedence; combinations of two or more pumps F04; fluid gearing F16H) [2024-01]
F01B 21/02
.
the machines or engines being all of reciprocating-piston type [2013-01]
F01B 21/04
.
the machines or engines being not all of reciprocating-piston type, e.g. of reciprocating steam engine with steam turbine [2013-01]
F01B 23/00
Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby (F01B 11/00 takes precedence; fluid gearing F16H) [2024-01]
F01B 23/02
.
Adaptations for driving vehicles, e.g. locomotives [2024-01]
F01B 23/04
. .
the vehicles being waterborne vessels [2013-01]
F01B 23/06
.
Adaptations for driving, or combinations with, hand-held tools or the like [2013-01]
F01B 23/08
.
Adaptations for driving, or combinations with, pumps [2013-01]
F01B 23/10
.
Adaptations for driving, or combinations with, electric generators [2013-01]
F01B 23/12
.
Adaptations for driving rolling mills or other heavy reversing machinery [2013-01]
​
F01B 25/00
Regulating, controlling, or safety means (regulating or controlling in general G05) [2016-05]
NOTE

F01B 25/02
.
Regulating or controlling by varying working-fluid admission or exhaust, e.g. by varying pressure or quantity (distributing or expansion valve gear F01L) [2013-01]
F01B 25/04
. .
Sensing elements [2013-01]
F01B 25/06
. . .
responsive to speed [2013-01]
F01B 25/08
. .
Final actuators [2013-01]
F01B 25/10
. . .
Arrangements or adaptations of working-fluid admission or discharge valves (valves in general F16K) [2013-01]
F01B 25/12
. .
Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted (sensing elements alone F01B 25/04; final actuators alone F01B 25/08) [2013-01]
F01B 25/14
. .
peculiar to particular kinds of machines or engines [2013-01]
F01B 25/16
.
Safety means responsive to specific conditions (against water hammer or the like in steam engines F01B 31/34) [2013-01]
F01B 25/18
. .
preventing rotation in wrong direction [2013-01]
F01B 25/20
.
Checking operation on safety devices [2013-01]
F01B 25/22
.
Braking by redirecting working-fluid [2013-01]
F01B 25/24
. .
thereby regenerating energy [2013-01]
F01B 25/26
.
Warning devices [2013-01]
F01B 27/00
Starting of machines or engines (starting combustion engines F02N) [2013-01]
F01B 27/02
.
of reciprocating-piston engines [2013-01]
F01B 27/04
. .
by directing working-fluid supply, e.g. by aid of by-pass steam conduits [2013-01]
F01B 27/06
. . .
specially for compound engines [2013-01]
F01B 27/08
. .
Means for moving crank off dead-centre (turning-gear in general F16H) [2013-01]
F01B 29/00
Machines or engines with pertinent characteristics other than those provided for in preceding main groups [2013-01]
F01B 29/02
.
Atmospheric engines, i.e. atmosphere acting against vacuum [2013-01]
F01B 29/04
.
characterised by means for converting from one type to a different one [2013-01]
F01B 29/06
. .
from steam engine into combustion engine [2013-01]
F01B 29/08
.
Reciprocating-piston machines or engines not otherwise provided for [2013-01]
F01B 29/10
. .
Engines (refrigeration machines F25B) [2013-01]
F01B 29/12
. . .
Steam engines (toy steam engines A63H 29/16) [2013-01]
F01B 31/00
Component parts, details, or accessories not provided for in, or of interest apart from, other groups (machine or engine casings, other than those peculiar to steam engines, F16M) [2013-01]
F01B 31/005
.
{Silencing equipment (silencing for steam engines F01B 31/16)} [2013-01]
F01B 31/02
.
De-icing means for engines having icing phenomena [2013-01]
F01B 31/04
.
Means for equalising torque in reciprocating-piston machines or engines (compensation of inertial forces, suppression of vibration in systems F16F) [2013-01]
F01B 31/06
.
Means for compensating relative expansion of component parts [2013-01]
F01B 31/08
.
Cooling of steam engines (cooling of fluid machines or engines in general F01P); Heating; Heat insulation (heat insulation in general F16L 59/00) [2013-01]
F01B 31/10
.
Lubricating arrangements of steam engines (of fluid machines or engines in general F01M) [2013-01]
F01B 31/12
.
Arrangements of measuring or indicating devices (warning apparatus F01B 25/26; measuring instruments or the like per se G01) [2013-01]
F01B 31/14
.
Changing of compression ratio [2013-01]
F01B 31/16
.
Silencers specially adapted for steam engines (arrangements of exhaust pipes or tubes on steam engines F01B 31/30; gas-flow silencers or exhaust silencers for machines or engines in general F01N) [2013-01]
F01B 31/18
.
Draining [2013-01]
F01B 31/20
. .
of cylinders [2013-01]
F01B 31/22
.
Idling devices, e.g. having by-passing valves [2013-01]
F01B 31/24
. .
Disengagement of connections between pistons and main shafts [2013-01]
F01B 31/26
.
Other component parts, details, or accessories, peculiar to steam engines [2013-01]
F01B 31/28
. .
Cylinders or cylinder covers [2013-01]
F01B 31/30
. .
Arrangements of steam conduits [2013-01]
F01B 31/32
. .
Arrangements or adaptations of vacuum breakers [2013-01]
F01B 31/34
. .
Safety means against water hammers or against the penetration of water (steam traps F16T) [2013-01]
F01B 31/36
. . .
automatically cutting-off steam supply [2013-01]
F01B 2170/00
Steam engines, e.g. for locomotives or ships [2013-01]
F01B 2170/04
.
To-be-deleted with administrative transfer to parent group [2013-01]
F01B 2170/0405
. .
To-be-deleted with administrative transfer to parent group [2013-01]
F01B 2170/0411
. . .
for locomotives [2013-01]
F01B 2170/0417
. . .
for locomobiles driven by small motors [2013-01]
F01B 2170/0423
. . .
Single acting steam engines with 1, 2 or 3 cylinders [2013-01]
F01B 2170/0429
. . .
Double acting high pressure machines [2013-01]
F01B 2170/0435
. . .
Compound machines with double or plural expansion; Auxiliaries driven by main engine [2013-01]
F01B 2170/0441
. . .
Compound engines with monolytic pistons in same cylinder [2013-01]
F01B 2170/0447
. . .
Machines with more than one piston in a cylinder and with counter moving pistons [2013-01]
F01B 2170/0452
. . .
Engines without connecting rods [2013-01]
F01B 2170/0458
. . .
Moving cylinders for steam engines, e.g. with telescopic cylinder arrangements [2013-01]
F01B 2170/0464
. . .
Oscillating cylinders for steam engines [2013-01]
F01B 2170/047
. . .
General arrangements for steam engines [2017-05]
F01B 2170/0476
. . .
Components or parts for steam engines [2013-01]
F01B 2170/0482
. . .
with toroidal cylinder space [2013-01]
F01B 2170/0488
. . . .
To-be-deleted with administrative transfer to parent group [2013-01]
F01B 2170/0494
. . . . .
with fixed cylinder space [2013-01]
F01B 2250/00
Accessories of steam engines; Arrangements or control devices of piston pumps, compressors without crank shafts or condensors for so far as they influence the functioning of the engines [2013-01]
F01B 2250/001
.
Valves for steam inlet or outlet [2013-01]
F01B 2250/002
.
Valves, brakes, control or safety devices for steam engines [2013-01]
F01B 2250/003
.
Apparatus for control or receiver or condensor pressure [2013-01]
F01B 2250/004
.
Devices for draining or idling of steam cylinders or for uncoupling piston and connecting rod [2013-01]
F01B 2250/005
.
Oil separators for steam engines [2013-01]
F01B 2250/006
.
Arrangement of or controlling of piston pumps or compressors without crank shaft [2013-01]
F01B 2250/007
.
Condensing devices for steam engines [2013-01]
F01B 2250/008
.
Surface condensors for so far as they influence the functioning of the engine [2013-01]
F01B 2250/009
.
Condenser pumps for steam engines [2018-01]