DIFF Subgroup
E21B 1/14 driven by a rotating mechanism
Introduced: January 2000
Full Title
Full titles differ between systems:
IPC:
Percussion drilling > with a reciprocating impulse member > driven by a rotating mechanism
CPC:
Percussion drilling > with a reciprocating impulse member (E21B1/02, E21B1/38 take precedence) > driven by a rotating mechanism
IPC and CPC are identically structured here. All 2 subcodes exist in both systems.
IPC defines codes here since 2000.
Child Classifications
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- E21B 1/16 with spring-mounted reciprocating masses, e.g. with air cushion since 2000 IPC+CPC Available in IPC and CPC