IPC 7 English version F03C !A-F03C 5/02

F03C-F03C00502

SECTION F – MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

F 03

MACHINES OR ENGINES FOR LIQUIDS (for liquids and elastic fluids F01; positive-displacement machines for liquids F04); WIND, SPRING, WEIGHT, OR MISCELLANEOUS MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR

F 03 C

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 definitions 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".

Reciprocating-piston liquid engines

007

with single cylinder, double-acting piston [5]

013

with single cylinder, single-acting piston [5]

with multiple cylinders, characterised by the number or arrangement of cylinders (with movable cylinders F03C 1/22; of flexible-wall type F03C 5/02)

with movement in two directions being obtained by two single-acting piston liquid engines, each acting in one direction [5]

with cylinders in star- or fan-arrangement

047

the pistons co-operating with an actuated element at the outer ends of the cylinders [5]

053

the pistons co-operating with an actuated element at the inner ends of the cylinders [5]

with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis

Distributing valve-gear peculiar thereto (for multiple-cylinder engines F03C 1/34; for engines with positive displacement in general F01L)

actuated by piston or piston-rod

mechanically [5]

actuated by the driving liquid of the engine [5]

Speed controlling, equalising, or cushioning [5]

specially adapted for engines generating vibration only

with movable cylinders

in which the liquid exclusively displaces one or more pistons reciprocating in rotary cylinders

247

with cylinders in star- or fan-arrangement [5]

253

with cylinder axes generally coaxial with, or parallel to, main shaft axis [5]

adapted for special use or combined with apparatus driven thereby (aspects predominantly concerning the driven apparatus, see the relevant classes for such apparatus)

Pistons specially adapted therefor [5]

Cams specially adapted therefor [5]

Cylinders specially adapted therefor [5]

Distribution members specially adapted for multiple-cylinder engines [5]

Cylindrical distribution members [5]

Plate-like distribution members [5]

Control specially adapted therefor [5]

Rotary-piston engines (in which the liquid exclusively displaces one or more piston reciprocating in rotary cylinders F03C 1/24) [3]

Note

Group F03C 2/30 takes precedence over groups F03C 2/02 to F03C 2/24. [3]

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 [3]

of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing [3]

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 [3]

of counter-engagement type, i.e. the movement of co-operating members at the points of engagement being in opposite directions [3]

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 [3]

Oscillating-piston engines [3]

Other engines

of flexible-wall type