Rotary rock drilling chuck

Details Rotary rock drilling chuck Rotary rock drilling chuck

1984-08-16

1986-06-10

Meister, James M.

Tool driving or impacting

Advance causing or controlling means

Rotary drive and advance originate from same mechanical element

279 4, E21C 500

Patent

active

045937699

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.

REFERENCES:
patent: 1180355 (1916-04-01), White
patent: 3885635 (1975-05-01), Menzel
patent: 4097177 (1978-06-01), Close
patent: 4398326 (1983-08-01), Joerger
patent: 4475318 (1984-10-01), Russ

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