|  | F |
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

ENGINES AND PUMPS

|  | F03 |
MACHINES OR ENGINES FOR LIQUIDS (for liquids and elastic fluids Fulltext... Hierarchy... Expanded...F01; positive-displacement machines for liquids Fulltext... Hierarchy... Expanded...F04); WIND, SPRING, WEIGHT, OR MISCELLANEOUS MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR

|  | F03B |
MACHINES OR ENGINES FOR LIQUIDS (machines or engines for liquids and elastic fluids Fulltext... Hierarchy... Expanded...F01; positive-displacement engines for liquids Fulltext... Hierarchy... Expanded...F03C; positive-displacement machines for liquids Fulltext... Hierarchy... Expanded...F04)

|  | F03B |
Note(s) Attention is drawn to the notes preceding class Fulltext... Hierarchy... Expanded...F01, especially as regards the definition of "reaction type". This sub-class comprises engines, other than of positive-displacement type, driven by liquids, machines, other than of positive-displacement type, for liquids.

|  | F03C |
POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS (positive-displacement engines for liquids and elastic fluids Fulltext... Hierarchy... Expanded...F01; positive-displacement machines for liquids Fulltext... Hierarchy... Expanded...F04; fluid-pressure actuators Fulltext... Hierarchy... Expanded...F15B; fluid gearing Fulltext... Hierarchy... Expanded...F16H)

|  | F03C |
Note(s) Attention is drawn to the notes preceding class Fulltext... Hierarchy... Expanded...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".

|  | F03D |
WIND MOTORS

|  | F03D |
Note(s) In this sub-class, the following terms are used with the meanings indicated: "Wind motor" means a mechanism for converting the energy of natural wind into useful mechanical power, and the transmission of such power to its point of use. "Rotor" means the wind-engaging parts of the wind motor and the rotary member carrying them. "Rotation axis" means the axis of rotation of the rotor.

|  | F03G |
SPRING, WEIGHT, INERTIA, OR LIKE MOTORS; MECHANICAL-POWER-PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR

|  | F03G |
Note(s) In this sub-class, the term "motors" means mechanisms for producing mechanical power from potential energy of solid bodies.

|  | F03H |
PRODUCING A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR (from combustion products Fulltext... Hierarchy... Expanded...F02K)