| F | SK | MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING |
| F17 | KL | STORING OR DISTRIBUTING GASES OR LIQUIDS (water supply E03B) |
| F17B | UKL | GAS-HOLDERS OF VARIABLE CAPACITY (self-acting gas cut-off devices A47J 27/62 , G05D; flame traps A62C 4/00; gas mixers B01F , F16K 11/00 , G05D 11/00; construction or assembling of bulk storage containers employing civil-engineering techniques E04H 7/00; gas compressors F04; valves F16K; damping pulsations in valves or pipes F16K , F16L; pipes F16L; stopping devices for gas mains F16L 55/10; vessels adapted for storing compressed, liquefied, or solidified gases F17C; gas distribution systems F17D 1/04; detecting leakage F17D 5/02 , G01M; supervising or alarm devices F17D 5/02 , G08B; control of combustion in burners F23N; gas flow or pressure regulators G05D) |
| F17B 1/00 | HGR | Gas-holders of variable capacity (large containers in general B65D 88/00; storing fluids in natural or artificial cavities or chambers in the earth B65G 5/00) |
| F17B 1/007 | UGR1 | | . | with telescopically movable ring-shaped parts (F17B 1/10 takes precedence; sealing of rings F17B 1/04) [2] |
|
| F17B 1/013 | UGR1 | |
| F17B 1/02 | UGR1 | |
| F17B 1/04 | UGR2 | | . . | Sealing devices for sliding parts (in general F16J 15/00) |
|
| F17B 1/06 | UGR3 | | . . . | using sealing liquids |
|
| F17B 1/08 | UGR3 | | . . . | using resilient materials for packing, e.g. leather |
|
| F17B 1/10 | UGR2 | |
| F17B 1/12 | UGR2 | | . . | Gas admission or discharge arrangements |
|
| F17B 1/14 | UGR2 | | . . | Safety devices, e.g. prevention of excess pressure |
|
| F17B 1/16 | UGR1 | |
| F17B 1/18 | UGR2 | |
| F17B 1/20 | UGR2 | |
| F17B 1/22 | UGR3 | |
| F17B 1/24 | UGR1 | |
| F17B 1/26 | UGR2 | | . . | with flexible walls, e.g. bellows (connection of valves to inflatable elastic bodies B60C 29/00) |
|