Drilling implement and method for operating a drilling...

Details Drilling implement and method for operating a drilling... Drilling implement and method for operating a drilling...

2011-08-23

2011-08-23

Smith, Scott A. (Department: 3721)

Tool driving or impacting

With vehicle support for drive

C173S152000, C173S216000, C175S170000, C175S220000

Reexamination Certificate

active

08002048

ABSTRACT:
The invention relates to a drilling implement with a derrick, a drill drive for driving a drill rod guided on the derrick and a gear, which is placed between the drill drive and drill rod for transmission purposes. According to the invention, for inverting the gear ratio, the gear is placed in disengageable and reversible manner on the drill drive.

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