|  | 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

|  | 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".

|  | F03C 1/00 |
Reciprocating-piston engines

|  | F03C 1/02 |
· | of multi-cylinder type (with movable cylinders Fulltext... Hierarchy... Expanded...F03C 1/22; of flexible-wall type Fulltext... Hierarchy... Expanded...F03C 5/02)

|  | F03C 1/04 |
· · | with cylinders in star- or fan-arrangement

|  | F03C 1/06 |
· · | with cylinder axes coaxial with, or parallel or inclined to, main shaft axis

|  | F03C 1/08 |
· | Distributing valve-gear peculiar thereto (for engines with positive displacement in general Fulltext... Hierarchy... Expanded...F01L)

|  | F03C 1/10 |
· · | actuated by piston or piston-rod

|  | F03C 1/12 |
· · · | mechanically (Fulltext... Hierarchy... Expanded...F03C 1/18 takes precedence)

|  | F03C 1/14 |
· · · | by driving liquid of engine (Fulltext... Hierarchy... Expanded...F03C 1/18 takes precedence)

|  | F03C 1/16 |
· · · | Speed controlling, equalising, or cushioning

|  | F03C 1/18 |
· · · | with a common valve-gear for more than one cylinder

|  | F03C 1/20 |
· · · | specially for engines generating vibration only

|  | F03C 1/22 |
· | with movable cylinders

|  | F03C 1/24 |
· · | in which the liquid exclusively displaces one or more pistons reciprocating in rotary cylinders

|  | F03C 1/26 |
· | adapted for special use or combined with apparatus driven thereby (aspects predominantly concerning the driven apparatus, see the relevant classes for such apparatus)

|  | F03C 2/00 |
Rotary-piston engines (in which the liquid exclusively displaces one or more piston reciprocating in rotary cylinders Fulltext... Hierarchy... Expanded...F03C 1/24) [3]

|  | F03C 2/02 - F03C 2/24 |
Note(s) Group Fulltext... Hierarchy... Expanded...F03C 2/30 takes precedence over groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F03C 2/02-F03C 2/24. [3]

|  | F03C 2/02 |
· | 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]

|  | F03C 2/08 |
· | of intermeshing-engangement type, i.e. with engagement of co-operating members similar to that of toothed gearing [3]

|  | F03C 2/22 |
· | 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]

|  | F03C 2/24 |
· | of counter-engagement type, i.e. the movement of co-operating members at the points of engagement being in opposite directions [3]

|  | F03C 2/30 |
· | having the characteristics covered by two or more of groups Fulltext... Hierarchy... Expanded...F03C 2/02, Fulltext... Hierarchy... Expanded...F03C 2/08, Fulltext... Hierarchy... Expanded...F03C 2/22, Fulltext... Hierarchy... Expanded...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]

|  | F03C 3/00 |
( transferred to Fulltext... Hierarchy... Expanded...F03C 2/00, Fulltext... Hierarchy... Expanded...F03C 4/00 )

|  | F03C 4/00 |
Oscillating-piston engines [3]

|  | F03C 5/00 |
Other engines

|  | F03C 5/02 |
· | of flexible-wall type