| IPC 7 English version |
| F15C-F15C00700 |
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| SECTION F – MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING |
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| F 15 | FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL |
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| F 15 C | FLUID-CIRCUIT ELEMENTS PREDOMINANTLY USED FOR COMPUTING OR CONTROL PURPOSES (transducers F15B 5/00; fluid dynamics in general F15D; computers comprising fluid elements G06D, G06G) |
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| Note |
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| Attention is drawn to the Notes following the titles of class B81 and subclass B81B relating to "micro-structural devices" and "micro-structural systems". [7] |
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1/ | 00 | Circuit elements having no moving parts |
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1/ | 02 | . | Details |
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1/ | 04 | . | . | Means for controlling fluid streams to fluid devices, e.g. by electric signals |
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1/ | 06 | . | . | Constructional details; Selection of specified materials |
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| Note |
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| Group F15C 1/22 takes precedence over groups F15C 1/08 to F15C 1/20. [2] |
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1/ | 08 | . | Boundary-layer devices, e.g. wall-attachment amplifiers [2] |
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1/ | 10 | . | . | for digital operation, e.g. to form a logical flip-flop, OR-gate, NOR-gate |
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1/ | 12 | . | . | . | Multiple arrangements thereof for performing operations of the same kind, e.g. majority gates, identity gates |
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1/ | 14 | . | Stream-interaction devices; Momentum-exchange devices, e.g. operating by exchange between two orthogonal fluid jets |
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1/ | 16 | . | Vortex devices, i.e. devices in which use is made of the pressure drop associated with vortex motion in a fluid |
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1/ | 18 | . | Turbulence devices, i.e. devices in which a controlling stream will cause a laminar flow to become turbulent |
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1/ | 20 | . | Direct-impact devices, i.e. devices in which two collinear opposing power streams are impacted |
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1/ | 22 | . | Oscillators [2] |
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3/ | 00 | Circuit elements having moving parts (valves, construction of valves F16K) |
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| Note |
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| Group F15C 3/16 takes precedence over groups F15C 3/02 to F15C 3/14. [2] |
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3/ | 02 | . | using spool valves |
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3/ | 04 | . | using diaphragms (connection of valves to inflatable elastic bodies B60C 29/00) |
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3/ | 06 | . | using balls |
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3/ | 08 | . | using reeds |
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3/ | 10 | . | using nozzles or jet pipes |
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3/ | 12 | . | . | the nozzle or jet pipe being movable |
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3/ | 14 | . | . | the jet from the nozzle being intercepted by a flap |
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3/ | 16 | . | Oscillators [2] |
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4/ | 00 | Circuit elements characterised by their special functions |
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5/ | 00 | Manufacture of fluid-circuit elements; Manufacture of assemblages of such elements |
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7/ | 00 | Hybrid elements, i.e. circuit elements having features according to groups F15C 1/00 and F15C 3/00 [2] |
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