Roller bits (E21B10/26 takes precedence; roller core bits E21B10/06; characterised by wear resisting parts E21B10/50)

Introduced: January 1980

Title

Titles differ between systems:

IPC: Roller bits

CPC: Roller bits (E21B10/26 takes precedence; roller core bits E21B10/06; characterised by wear resisting parts E21B10/50)

Full Title

Full titles differ between systems:

IPC:

Drill bits > Roller bits

CPC:

Drill bits (specially adapted for deflecting the direction of boring ; with means for collecting substances E21B27/00) > Roller bits (E21B10/26 takes precedence; roller core bits E21B10/06; characterised by wear resisting parts E21B10/50)

Of 9 combined children, 7 exist in both systems.

2 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1980.

Child Classifications

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E21B 10/083 CPC only CPC only
E21B 10/086 CPC only CPC only
E21B 10/10 with roller axle supported at both ends since 1980 IPC+CPC Available in IPC and CPC
E21B 10/12 with discs cutters since 1980 IPC+CPC Available in IPC and CPC
E21B 10/14 combined with non-rolling cutters other than of leading-portion type since 1980 IPC+CPC Available in IPC and CPC
E21B 10/16 characterised by tooth form or arrangement since 1980 IPC+CPC Available in IPC and CPC
E21B 10/18 characterised by conduits or nozzles for drilling fluids since 1980 IPC+CPC Available in IPC and CPC
E21B 10/20 characterised by detachable or adjustable parts, e.g. legs or axles since 1980 IPC+CPC Available in IPC and CPC
E21B 10/22 characterised by bearing, lubrication or sealing details since 1980 IPC+CPC Available in IPC and CPC