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| SECTION F– MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING |
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| F 04 | POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS (portable fire extinguishers with manually-operated pumps A 62 C 11/00, with power-driven pumps A 62 C 25/00; charging or scavenging combustion engines by pumps F 02 B; engine fuel-injection pumps F 02 M; ion pumps H 01 J 41/12; electrodynamic pumps H 02 K 44/02) |
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| Note |
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| Combinations of positive-displacement and non-positive-displacement pumps are classified in subclass F 04 B as a general subclass for pumps, and in subclasses F 04 C, F 04 D in respect of matter specific to those subclasses. |
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| F 04 B | POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F 04 C; non-positive-displacement pumps F 04 D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F 04 F; crankshafts, crossheads, connecting-rods F 16 C; flywheels F 16 F; gearings for interconverting rotary motion and reciprocating motion in general F 16 H; pistons, piston-rods, cylinders, in general F 16 J) |
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| F 04 C | ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F 03 C) |
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| F 04 D | NON-POSITIVE-DISPLACEMENT PUMPS |
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| F 04 F | PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED (containers or packages with special means for dispensing liquid or semi-liquid contents by internal gaseous pressure B 65 D 83/14) |
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