F
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  
ENGINES OR PUMPS
 F03
MACHINES OR ENGINES FOR LIQUIDS (for liquids and elastic fluids F01; positive-displacement machines for liquids 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 F01; positive-displacement machines for liquids F04; fluid-pressure actuators F15B; fluid gearing F16H)
 F03C

Note(s)

Attention is drawn to the Notes preceding class F01, especially as regards the definitions 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 F03C 1/22; of flexible-wall type 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 F01L)
 F03C 1/10
·  ·  actuated by piston or piston-rod
 F03C 1/12
·  ·  ·  mechanically (F03C 1/18 takes precedence)
 F03C 1/14
·  ·  ·  by driving liquid of engine (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 F03C 1/24)  [3]
 F03C 2/02 - 
F03C 2/24

Note(s)

Group F03C 2/30 takes precedence over groups F03C 2/02-F03C 2/24.

 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 F03C 2/02, F03C 2/08, F03C 2/22, 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 4/00
Oscillating-piston engines  [3]
 F03C 5/00
Other engines
 F03C 5/02
·  of flexible-wall type