Rotary rock drilling chuck

Details Rotary rock drilling chuck Rotary rock drilling chuck

E - Fixed Constructions

21

B

255/54

E21B 3/02 (2006.01)

Patent

CA 1237423

ABSTRACT A chuck for a drilling machine is fitted to a retractable spindle 21. Plungers 25 carried by a yoke 26 move when the yoke 26 abuts the front end 20 of the machine. This charges an accumulator carried inside the chuck body. Opening a valve 39 causes the chuck jaws to clamp while closing the valve 39 and opening a valve 55 causes the chuck jaws to relax.

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