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

|  | F01 - F04 |
Subsection index
MACHINES |
positive displacement |
rotary or oscillating piston |
liquid and elastic fluid or elastic fluid | F01C
liquid only | F04C
reciprocating piston or other |
liquid and elastic fluid or elastic fluid | F01B
liquid only | F04B
non-positive displacement |
liquid and elastic fluid or elastic fluid | F01D
liquid only | F03B
ENGINES |
positive displacement |
rotary or oscillating piston |
liquid and elastic fluid or elastic fluid | F01C
liquid only | F03C
reciprocating piston or other |
liquid and elastic fluid or elastic fluid | F01B
liquid only | F03C
non-positive displacement |
liquid and elastic fluid or elastic fluid | F01D
liquid only | F03B
PUMPS |
positive displacement |
rotary or oscillating piston | F04C
reciprocating piston or other | F04B
non-positive displacement | F04D

ENGINEERING IN GENERAL

|  | F15 |
FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL

|  | F15B |
SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR (motors, turbines, compressors, blowers, pumps Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F01-F04; fluid dynamics Fulltext... Hierarchy... Expanded...F15D; fluid clutches or brakes Fulltext... Hierarchy... Expanded...F16D; fluid springs Fulltext... Hierarchy... Expanded...F16F; fluid gearing Fulltext... Hierarchy... Expanded...F16H; pistons, cylinders, packing Fulltext... Hierarchy... Expanded...F16J; valves, taps, cocks, actuating-floats Fulltext... Hierarchy... Expanded...F16K; safety valves with auxiliary fluid operation of the main valve Fulltext... Hierarchy... Expanded...F16K 17/10; fluid-operating means for valves Fulltext... Hierarchy... Expanded...F16K 31/12; pipes, pipe joints Fulltext... Hierarchy... Expanded...F16L; lubricating Fulltext... Hierarchy... Expanded...F16N)

|  | F15B |
Note(s) In this subclass, the following terms are used with the meanings indicated: "telemotor" means a system or device in which a substantially constant amount of fluid is trapped between an input member and an output member to act as a fluid link; "servomotor" means a fluid-pressure actuator, e.g. a piston and cylinder, directly controlled by a valve or other device which is responsive to operation of an initial controlling member; "Servomotor" does not cover a telemotor. The initial controlling member may be adjacent to the servomotor or at a distance, and may be, for example, a hand lever.

|  | F15B |
Subclass index
SUPPLYING FLUID UNDER PRESSURE | 1/00
INTENSIFIERS OR FLUID-PRESSURE CONVERTERS; TRANSDUCERS | 3/00; 5/00
FLUID-PRESSURE ACTUATOR SYSTEMS |
Telemotors or systems related to the output of a pump | 7/00
Servomotors | 9/00, 11/00, 13/00
Devices for displacing a member | 15/00
Combinations of telemotors and servomotors; other systems; details | 17/00; 18/00; 21/00
TESTING; SAFETY | 19/00; 20/00

|  | F15C |
FLUID-CIRCUIT ELEMENTS PREDOMINANTLY USED FOR COMPUTING OR CONTROL PURPOSES (transducers Fulltext... Hierarchy... Expanded...F15B 5/00; fluid dynamics in general Fulltext... Hierarchy... Expanded...F15D; computers comprising fluid elements Fulltext... Hierarchy... Expanded...G06D, Fulltext... Hierarchy... Expanded...G06G)

|  | F15C |
Note(s) Attention is drawn to the Notes following the titles of class Fulltext... Hierarchy... Expanded...B81 and subclass Fulltext... Hierarchy... Expanded...B81B relating to "micro-structural devices" and "micro-structural systems". [7]

|  | F15D |
FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS (fluid-circuit elements Fulltext... Hierarchy... Expanded...F15C)

|  | F15D |
Note(s) This subclass covers boundary-layer control and other arrangements and methods, not provided for in other classes, for influencing the flow of fluids relative to constraining surfaces and after leaving these surfaces, e.g. producing or removing turbulence, deflecting jets, guiding flow through bends in conduits, affecting distribution of fluid in a conduit, reducing fluid friction.