Control system for a percussion drive

Details Control system for a percussion drive Control system for a percussion drive

2006-05-23

2006-05-23

Smith, Scott A. (Department: 3721)

Tool driving or impacting

Impacting devices

Selective axial direction of impact

C173S211000, C175S019000, C175S296000

Reexamination Certificate

active

07048074

ABSTRACT:
The invention relates to a control system for a percussion drive of an earth drilling unit having a housing, a drilling tool, a pulling or thrusting drive, a percussion piston, a pressure chamber belonging to the percussion piston and a pressure medium feed, which can be connected and disconnected, for the operation of the percussion piston, wherein the connecting and disconnecting of the pressure medium feed occurs when the pulling or thrusting drive exceeds or falls below a specific pull or thrust.

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