LOCKING MECHANISM FOR A GROUND DRILL

摘要

A locking mechanism (20) for locking an insertable device (30) relative to an outer tube (10) of a ground drill comprises at least one latch (6), which is arranged to releasably retain the insertable device (30) in a substantial ly fixed axial position relative to the outer tube (10). The locking mechanism (20) comprises a cam (12) and a cam follower (5), which are arranged to control a radial position of the latch (6). The locking system may be used in a ground drill system.