|  | 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

|  | F17 |
STORING OR DISTRIBUTING GASES OR LIQUIDS (water supply Fulltext... Hierarchy... Expanded...E03B)

|  | F17D |
PIPE-LINE SYSTEMS; PIPE-LINES (pumps or compressors Fulltext... Hierarchy... Expanded...F04; fluid dynamics Fulltext... Hierarchy... Expanded...F15D; valves or the like Fulltext... Hierarchy... Expanded...F16K; pipes, laying pipes, supports, joints, branches, repairing, work on the entire line, accessories Fulltext... Hierarchy... Expanded...F16L; steam traps or the like Fulltext... Hierarchy... Expanded...F16T; fluid-pressure electric cables Fulltext... Hierarchy... Expanded...H01B 9/00)

|  | F17D |
Note(s) In this subclass, the following expression is used with the meaning indicated: "pipe-line systems" means systems described in flow sheets as well as arrangements of co-operating elements, the elements per se being covered by the relevant subclasses.

P:20 |  | F17D 1/00 |
Pipe-line systems (conveying articles or materials through a pipe-line by means of a fluid carrier Fulltext... Hierarchy... Expanded...B65G 51/00, Fulltext... Hierarchy... Expanded...B65G 53/00; dispensing, delivering or transferring liquids Fulltext... Hierarchy... Expanded...B67D; special devices for transferring liquids from bulk storage containers into vehicles or boats or vice versa, e.g. loading or unloading vehicles or portable containers Fulltext... Hierarchy... Expanded...B67D 5/00; conveying material which has been excavated by a dredger or soil shifter through a pipe-line Fulltext... Hierarchy... Expanded...E02F 7/00; sewer pipe-line systems Fulltext... Hierarchy... Expanded...E03F 3/00; preventing freezing by heating Fulltext... Hierarchy... Expanded...F16L 53/00; thermal insulation of pipe-lines Fulltext... Hierarchy... Expanded...F16L 59/00; central heating systems Fulltext... Hierarchy... Expanded...F24D) [2]

P:10 |  | F17D 3/00 |
Arrangements for supervising or controlling working operations

P:0 |  | F17D 5/00 |
Protection or supervision of installations (arrangements for protecting foundations Fulltext... Hierarchy... Expanded...E02D 31/00; protecting pipes from damage or internal or external wear Fulltext... Hierarchy... Expanded...F16L 57/00, against corrosion or scale Fulltext... Hierarchy... Expanded...F16L 58/00; investigation of the fluid-tightness of structures Fulltext... Hierarchy... Expanded...G01M 3/00) [2]