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Class Information
Number: 175/264
Name: Boring or penetrating the earth > Cutter element laterally shiftable below ground (e.g., expansible) > With separable means holding tool collapsed above ground only
Description: 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.










Patents under this class:

Patent Number Title Of Patent Date Issued
3935912 Anchoring device and method for settling the device in the ground Feb. 3, 1976











 
 
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