E21D15/50 - CPC Classification

Props ; Chocks, e.g. made of flexible containers filled with backfilling material Component parts or details of props

• E21D15/502 » Prop bodies characterised by their shape, e.g. of specified cross-section 7
• E21D15/51 » specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves 3
• E21D15/52 » Extensible units located above or below standard props 4
• E21D15/54 » Details of the ends of props 2
• E21D15/56 » Details of locks of telescopic props 2

Recent Application in this class: