COMBINED LOCKDOG & KELLY BAR ADAPTOR

摘要

A combined lockdog and Kelly bar adapter is provided for drivingly connecting a Kelly bar to a shaft of an earth anchor. The adapter includes a unitary one-piece body comprising a first section defining a first socket sized and shaped to receive a Kelly bar and a second section defining a second socket sized and shaped to receive the shaft of the earth anchor. A flange is formed in the first socket and has an inner wall having a smaller circumference than the wall of the first socket, so that the adapter can receive two different sized Kelly bars. A spring biased pin is provided to engage a hole in the earth anchor shaft to axially fix the adapter relative to the earth anchor shaft. The pin includes a sloped surface which is engaged by the earth anchor shaft, so that the adapter can be applied to the earth anchor shaft simply by sliding the adapter over the earth anchor shaft. The adapter includes a carnming surface and a ring through an outer end of the pin. The ring and the caroming surface cooperate to selectively position the pin radially in the adapter relative to the anchor shaft.