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IPC6

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

MACHINES OR ENGINES FOR LIQUIDS

F03B

1/1

F 03

MACHINES OR ENGINES FOR LIQUIDS (for liquids and elastic fluids F 01; positive-displacement machines for liquids F 04); WIND, SPRING, WEIGHT, OR MISCELLANEOUS MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR

F 03 B

MACHINES OR ENGINES FOR LIQUIDS (machines or engines for liquids and elastic fluids F 01; positive-displacement engines for liquids F 03 C; positive-displacement machines for liquids F 04)

Notes

(1)	This subclass covers:

-	engines, other than of positive-displacement type, driven by liquids;

-	machines, other than of positive-displacement type, for liquids.

(2)	Attention is drawn to the Notes preceding class F 01, especially as regards the definition of "reaction type".

Non-positive-displacement machines or engines characterised by specified type, e.g. water turbines (adaptations of machines or engines for special use F 03 B 13/00; controlling F 03 B 15/00)

Engines of impulse type, i.e. turbines with jets of high-velocity liquid impinging on bladed or like rotors, e.g. Pelton wheels; Parts or details peculiar thereto

Buckets; Bucket-carrying rotors

Nozzles (in general B 05 B); Nozzle-carrying members

Machines or engines of reaction type; Parts or details peculiar thereto

with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis turbines

with substantially axial flow throughout rotors, e.g. propeller turbines

with adjustable blades, e.g. Kaplan turbines

with pressure/velocity transformation exclusively in rotors

characterised by having means for functioning alternatively as pumps or turbines

Blades; Blade-carrying rotors

Rotors having adjustable blades

Stator blades; Guide conduits or vanes, e.g. adjustable

Machines or engines characterised by non-bladed rotors, e.g. serrated, using friction

Water wheels

Endless-chain type machines or engines

Parts or details not provided for in, or of interest apart from, the preceding groups (controlling F 03 B 15/00)

for diminishing cavitation or vibration, e.g. balancing

Bearing arrangements

for removing foreign matter, e.g. mud

Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus (if the apparatus aspects are predominant, see the relevant places for such apparatus, e.g. H 02 K 7/18); Power stations or aggregates (hydraulic-engineering aspects E 02 B; incorporating only machines or engines of positive-displacement type F 03 C)

Adaptations for drilling wells

Adaptations for use in dentistry

Stations or aggregates of water-storage type (turbines characterised by having means for functioning alternatively as pumps F 03 B 3/10)

Machine or engine aggregates in dams or the like; Conduits therefor

Submerged units incorporating electric generators or motors

characterised by using wave or tide energy

using wave energy [4]

using the relative movement between a wave-operated member and another member [4]

wherein the other member is fixed, at least at one point, with respect to the sea bed or shore [4]

wherein both members are movable relative to the sea bed or shore [4]

using the flow of water resulting from wave movements, e.g. to drive a hydraulic motor or turbine [4]

to produce a flow of air, e.g. to drive an air turbine [4]

using tide energy [4]

Controlling (controlling in general G 05)

by varying liquid flow

of turbines (rotors having adjustable blades F 03 B 3/06, F 03 B 3/14; adjustable guide vanes F 03 B 3/18; specially adapted for turbines with jets of high-velocity liquid impinging on bladed or like rotors F 03 B 15/20)

Regulating, i.e. acting automatically

by speed, e.g. by measuring electric frequency or liquid flow

without retroactive action

with retroactive action

by or of water level

by power output

for safety purposes, e.g. preventing overspeed

specially adapted for turbines with jets of high-velocity liquid impinging on bladed or like rotors (nozzles F 03 B 1/04)

for safety purposes

Other machines or engines

using hydrostatic thrust

Alleged perpetua mobilia

using liquid flow, e.g. of swinging-flap type