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PCE
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DIFF Subgroup
E21C 37/08

Devices with pistons, plungers, or the like, pressed locally against the wall of the borehole

Introduced: September 1968

Title

Titles differ between systems:

IPC: Devices with pistons, plungers, or the like pressed locally against the wall of the borehole

CPC: Devices with pistons, plungers, or the like, pressed locally against the wall of the borehole

Full Title

Full titles differ between systems:

IPC:

Other methods or devices for dislodging with or without loading > by making use of hydraulic or pneumatic pressure in a borehole > Devices with pistons, plungers, or the like pressed locally against the wall of the borehole

CPC:

Other methods or devices for dislodging with or without loading (breaking-down by means inserted in slits E21C27/14) > by making use of hydraulic or pneumatic pressure in a borehole > Devices with pistons, plungers, or the like, pressed locally against the wall of the borehole

No child classifications to compare. This is a leaf node in both IPC and CPC.