Patent ID: 9687917
Date: 2017-06-27
CPC Classifications: B23B,Y10T

Claim:
1. A quick connect/disconnect mechanism for a rotary bit having a central mounting hole at a proximal end thereof, including: a shaft extending axially and having a proximal end adapted to be releasably secured in a rotary tool; an upper support ring having an interior bore secured concentrically about a distal end of said shaft, said upper support ring having a pair of diametrically opposed recesses extending in said interior bore; a pair of retainer arms disposed substantially within said diametrically opposed recesses, each of said retainer arms including a distal end having a catch adapted to engage the central mounting hole of the bit, and a proximal end; a pair of engagement notches each formed in one of said retainer arms; an outer sleeve secured about said shaft and adapted for rotational movement thereabout; a plurality of engagement keys extending radially inwardly from the interior surface of said outer sleeve and disposed to releasably engage said engagement notches; torque spring means disposed within said outer sleeve and connected between said shaft and said outer sleeve to resiliently bias said outer sleeve to rotate and maintain said engagement keys in said engagement notches; retainer spring means disposed between said upper support ring and said retainer arms to resiliently urge said retainer arms radially inwardly and distally; whereby rotation of said outer sleeve against the bias of said torque spring means moves said engagement keys to release said engagement notches and enable said retainer spring means to move said retainer arms radially inwardly and distally to release said catches from the central mounting hole of the rotary bit.