Earth auger drill

Details Earth auger drill Earth auger drill

E - Fixed Constructions

21

B

255/67

E21B 10/00 (2006.01) E21B 1/00 (2006.01) E21B 10/44 (2006.01)

Patent

CA 1038854

A B S T R A C T A drill of the type comprising a pilot point for locating the drill in a medium to be drilled and cutting means extending from the pilot point and having a radially outermost portion which defines the radius of the hole to be drilled and which precedes a radially inner portion into the medium both axially and radially to promote fracture of the medium laterally of the direction of drilling and thereby to facilitate drill penetration into the medium.

220881

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