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Color Curly Brackets (indicating CPC extensions to IPC) References Date Revised

CPC
COOPERATIVE PATENT CLASSIFICATION
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POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS (positive- displacement engines for liquids and elastic fluids F01; positive- displacement machines for liquids F04; fluid-pressure actuators F15B; fluid gearing F16H)
NOTE
-
Attention is drawn to the notes preceding class F01, especially as regards the meanings of "positive displacement", "rotary-piston machines", "oscillating-piston machines", "rotary-piston", "co-operating members", "movement of co-operating members", "teeth or tooth-equivalents", and "internal axis".

WARNING
-
The following IPC groups are not used in the CPC scheme. Subject matter covered by these groups is classified in the following CPC groups:
F03C1/253 covered by F03C
F03C1/28 " " F03C 1/0406, F03C 1/0605
F03C1/30 " " F03C 1/0409, F03C 1/0631, F03C 1/0668
F03C1/32 " " F03C 1/0415, F03C 1/0626, F03C 1/0652
F03C1/34 " " F03C 1/0435, F03C 1/0615, F03C 1/0655
F03C1/36 " " F03C 1/0435, F03C 1/0615, F03C 1/0655
F03C1/38 " " F03C 1/0435, F03C 1/0615, F03C 1/0655
F03C1/40 " " F03C1/04N, F03C1/06K


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Reciprocating-piston liquid engines
F03C 1/001
.
{
the movement in two directions being obtained by two or more double-acting piston liquid motors
}
F03C 1/002
.
{
details; components parts
}
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.
{
controlling
}
F03C 1/004
. .
{
speed-control
}
F03C 1/005
. .
{
motor piston stroke control
}
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F03C 1/007
.
with single cylinder, double-acting piston
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F03C 1/0073
. .
{
one side of the double-acting piston being always under the influence of the liquid under pressure
}
F03C 1/0076
. . .
{
the liquid under pressure being continuously delivered to one cylinder chamber through a valve in the piston for actuating the return stroke
}
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F03C 1/013
.
with single cylinder, single-acting piston
F03C 1/0135
. .
{
with actuation of the return stroke by gravity
}
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F03C 1/02
.
with multiple-cylinders, characterised by the number or arrangement of cylinders (with movable cylinders F03C 1/22; of flexible-wall type F03C 7/00)
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F03C 1/03
. .
with movement in two directions being obtained by two single-acting piston liquid engines, each acting in one direction
F03C 1/035
. . .
{
one single-acting piston being always under the influence of the liquid under pressure
}
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F03C 1/04
. .
with cylinders in star or fan arrangement
{
F03C 1/22 takes precedence
}
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F03C 1/0403
. . .
{
Details, component parts specially adapted of such engines
}
F03C 1/0406
. . . .
{
Pistons
}
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F03C 1/0409
. . . .
{
Cams
}
F03C 1/0412
. . . . .
{
consisting of several cylindrical elements e.g. rollers
}
F03C 1/0415
. . . .
{
Cylinders
}
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F03C 1/0419
. . . .
{
Arrangements for pressing or connecting the pistons against the actuated cam
}
F03C 1/0422
. . . . .
{
hydraulically
}
F03C 1/0425
. . . .
{
Disconnecting the pistons from the actuated cam (in general F01B 31/24)
}
F03C 1/0428
. . . .
{
Supporting and guiding means for the pistons
}
F03C 1/0431
. . . .
{
Draining of the engine housing; arrangements dealing with leakage fluid
}
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F03C 1/0435
. . . .
{
Particularities relating to the distribution members (F03C 1/0472, F03C 1/0531, and F03C 1/0538 take precedence)
}
F03C 1/0438
. . . . .
{
to cylindrical distribution members
}
F03C 1/0441
. . . . .
{
to conical distribution members
}
F03C 1/0444
. . . . .
{
to plate-like distribution members
}
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F03C 1/0447
. . .
{
Controlling
}
F03C 1/045
. . . .
{
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
}
F03C 1/0454
. . . .
{
by changing the effective cross sectional piston working surface
}
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F03C 1/0457
. . . .
{
by changing the effective piston stroke
}
F03C 1/046
. . . . .
{
by changing the excentricity of one element relative to another element
}
F03C 1/0463
. . . .
{
by changing the phase relationship between two actuated cams
}
F03C 1/0466
. . . .
{
by changing the phase relationship between the actuated cam and the distributing means
}
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F03C 1/047
. . .
the pistons co-operating with an actuated element at the outer ends of the cylinders
F03C 1/0472
. . . .
{
with cam-actuated distribution members
}
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F03C 1/0474
. . . .
{
with two or more radial piston/cylinder units in series
}
F03C 1/0476
. . . . .
{
directly located side by side
}
F03C 1/0478
. . . . .
{
having several cylinder barrels coupled together
}
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F03C 1/053
. . .
the pistons co-operating with an actuated element at the inner ends of the cylinders
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F03C 1/0531
. . . .
{
with cam-actuated distribution members
}
F03C 1/0533
. . . . .
{
each piston being provided with channels coacting with the cylinder and being used as a distribution member for another cylinder
}
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F03C 1/0535
. . . .
{
with two or more radial piston/cylinder units in series
}
F03C 1/0536
. . . . .
{
directly located side by side
}
F03C 1/0538
. . . .
{
the piston-driven cams being provided with inlets or outlets
}
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F03C 1/06
. .
with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
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F03C 1/0602
. . .
{
Component parts, details
}
F03C 1/0605
. . . .
{
Adaptations of pistons (pump pistons F04B 1/124, F04B 53/14)
}
F03C 1/0607
. . . .
{
Driven means
}
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F03C 1/061
. . .
{
having stationary cylinders
}
F03C 1/0613
. . . .
{
having two or more sets of cylinders or pistons
}
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F03C 1/0615
. . . .
{
distributing members
}
F03C 1/0618
. . . . .
{
cylindrical distribution members
}
F03C 1/0621
. . . . .
{
conical distribution members
}
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F03C 1/0623
. . . .
{
Details, component parts
}
F03C 1/0626
. . . . .
{
Cylinders
}
F03C 1/0628
. . . . .
{
Casings, housings
}
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F03C 1/0631
. . . . .
{
Wobbler or actuated element
}
F03C 1/0634
. . . . . .
{
Actuated element bearing means or driven axis bearing means
}
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F03C 1/0636
. . .
{
having rotary cylinder block
}
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F03C 1/0639
. . . .
{
having two or more sets of cylinders or pistons
}
F03C 1/0642
. . . . .
{
inclined on main shaft axis
}
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F03C 1/0644
. . . .
{
Component parts
}
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F03C 1/0647
. . . . .
{
Particularities in the contacting area between cylinder barrel and valve plate
}
F03C 1/0649
. . . . . .
{
Bearing means
}
F03C 1/0652
. . . . .
{
Cylinders
}
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F03C 1/0655
. . . . .
{
Valve means
}
F03C 1/0657
. . . . . .
{
Cylindrical valve means
}
F03C 1/066
. . . . . .
{
Conical valve means
}
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F03C 1/0663
. . . . .
{
Casings, housings
}
F03C 1/0665
. . . . . .
{
Cylinder barrel bearing means
}
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F03C 1/0668
. . . . .
{
Swash or actuated plate
}
F03C 1/0671
. . . . . .
{
Swash or actuated plate bearing means or driven axis bearing means
}
F03C 1/0673
. . . .
{
Connection between rotating cylinder and rotating inclined swash plate
}
F03C 1/0676
. . . .
{
Arrangement for pressing the cylinder barrel against the valve plate
}
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F03C 1/0678
. . .
{
Control
}
F03C 1/0681
. . . .
{
using a valve in a system with several motor chambers, wherein the flow path through the chambers can be changed
}
F03C 1/0684
. . . .
{
using a by-pass valve
}
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F03C 1/0686
. . . .
{
by changing the inclination of the swash plate
}
F03C 1/0689
. . . . .
{
using wedges
}
F03C 1/0692
. . . .
{
by changing the phase relationship between the actuated element and the distribution means, e.g. turning the valve plate; turning the swash plate
}
F03C 1/0694
. . . .
{
by changing the inclination of the axis of the cylinder barrel in relation to the axis of the actuated element
}
F03C 1/0697
. . . .
{
responsive to the speed
}
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F03C 1/08
.
Distributing valve-gear peculiar thereto (for engines with positive-displacement in general F01L);
{
F03C 1/06 takes precedence
}
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F03C 1/10
. .
actuated by piston or piston-rod
F03C 1/12
. . .
mechanically
F03C 1/14
. .
by driving liquid of engine (F03C1/18 takes precedence)
F03C 1/16
. .
Speed controlling, equalising or cushioning
F03C 1/20
. .
specially adapted for engines generating vibration only
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F03C 1/22
.
with movable cylinders
{
or cylinder
}
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F03C 1/223
. .
{
having cylinders in star or fan arrangement, the connection of the pistons with an actuated element being at the inner ends of the cylinders
}
F03C 1/226
. . .
{
with cam actuated distribution members
}
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F03C 1/24
. .
in which the liquid exclusively displaces one or more pistons reciprocating in rotary cylinders
{
(F03C 1/0636 takes precedence)
}
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F03C 1/2407
. . .
{
having cylinders in star or fan arrangement, the connection of the pistons with an actuated element being at the outer ends of the cylinders
}
F03C 1/2415
. . . .
{
cylinder block and actuated cam both rotating (F03C 1/2431 and F03C 1/2446 take precedence)
}
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F03C 1/2423
. . . .
{
with two or more series radial piston-cylinder units
}
F03C 1/2431
. . . . .
{
cylinder block and actuated cam both rotating (F03C 1/2446 takes precedence)
}
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F03C 1/2438
. . . . .
{
directly located side by side
}
F03C 1/2446
. . . . . .
{
cylinder block and actuated cam both rotating
}
F03C 1/2454
. . .
{
having cylinders in star or fan arrangement, the connection of the pistons with an actuated element being at the inner ends of the cylinders
}
F03C 1/2462
. . .
{
the rotary cylinder being provided with only one piston reci- procating within this cylinder
}
F03C 1/247
. . .
with cylinders in star- or fan-arrangement,
{
the connection of the pistons with an actuated element being at the outer ends of the cylinders
}
.
adapted for special use or combined with apparatus driven thereby (aspects predominantly concerning the driven apparatus see the relevant classes for such apparatus)
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Rotary-piston engines (in which the liquid exclusively displaces one or more piston reciprocating in rotary cylinders F03C 1/24)
NOTE
-
Group F03C 2/30 takes precedence over groups F03C 2/02 to F03C 2/24.

F03C 2/02
.
of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
F03C 2/08
.
of intermeshing-engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing
F03C 2/22
.
of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth- equivalents than the outer member
F03C 2/24
.
of counter-engagement type, i.e. the movement of co-operating members at the points of engagement being in opposite directions
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F03C 2/30
.
having the characteristics covered by two or more of groups F03C 2/02, F03C 2/08, F03C 2/22, F03C 2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
F03C 2/302
. .
{
having both the movements defined in sub-groups F03C 2/02 and relative reciprocation between members
}
F03C 2/304
. .
{
having both the movements defined in sub-group F03C 2/08 or F03C 2/22 and relative reciprocation between members
}
F03C 2/306
. .
{
having both the movements defined in sub-groups F03C 2/22 and F03C 2/24
}
F03C 2/308
. .
{
having the movement defined in F03C 2/08 and having a hinged member
}
Oscillating-piston engines
Engines of flexible-wall type
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Subject matter not provided for in other groups of this subclass
.
{
Free-piston type engines
}
This page is owned by Office of Patent Classification.
Last Modified: 10/10/2013