A closure device is used to prevent the insertible device from entering the outer pipe of the ground drill rig, which includes at least one insurance with a cam, an embedded surface, an export serum and a navigator shaft, and a cam bearing of a control terminal. Benefits.

摘要

Locking mechanism for locking a plug-in device with respect to an external tube of an Earth Boring Machine, which comprises at least one safe,A cam with first and second ends, a Cam Roller surface and a First longitudinal Edge extraction; System of Land Drilling Machine.