.~ With separable means holding tool collapsed above ground only
DEFINITION
Classification: 175/264
(under subclass 263) Apparatus in which the cutter element moves outwardly from the shaft axis to operative position and a means is provided which is detachable from the cutter element or bit head and which is temporarily attached to the cutter element above ground to hold the cutter element in an inward or collapsed position, usually to facilitate insertion of the cutter element in the borehole, said means being removed and remaining above ground when the cutter element is placed in the borehole.
SEE OR SEARCH CLASS
166, Wells,
85.1+, for above ground apparatus with assembly or disassembly means including means for aiding in inserting a member into or removing a member from a well.
