Rotary drill chuck with belleville spring biased jaws which are

Details Rotary drill chuck with belleville spring biased jaws which are Rotary drill chuck with belleville spring biased jaws which are

1984-09-04

1986-06-10

Silverberg, Fred

Chucks or sockets

With fluid-pressure actuator

Socket type

279 1C, B23B 3114, B23B 3130

Patent

active

045939195

ABSTRACT:
A rotary rock drilling chuck has three jaws for clamping a drill stem. Each jaw is carried by the step of a piston acting in a cylinder against belleville springs between it and an end cap. A projection from the piston passes through the belleville springs. Three pairs of masses are equally and circumferentially spaced about the clamping axis and acted upon by levers pivoted to the chuck body so that a mass acts upon a pair of levers each of which acts upon a piston to counteract centrifugal force acting on the piston.

REFERENCES:
patent: 1760395 (1930-05-01), Brock
patent: 3692320 (1972-09-01), Lindelof et al.
patent: 4009888 (1977-03-01), Wallace
patent: 4275892 (1981-06-01), Rohm
patent: 4437675 (1984-03-01), Koenig, III

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