IPC Main Group
E21D 15/00 Props; Chocks
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- FIXED CONSTRUCTIONS
- Class:
- EARTH OR ROCK DRILLING; MINING
- Subclass:
- SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
Related Keywords
props for MINE(S)roof supports for MINE(S)mine PROPSSHORES for mines
6 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- E21D 15/02 Non-telescopic props
- E21D 15/14 Telescopic props
- E21D 15/48 Chocks or the like
- E21D 15/5 Component parts or details of props
- E21D 15/58 Devices for setting props
- E21D 15/6 Devices for withdrawing props or chocks