Six jaw equalizing chuck

A equalizing chuck assembly comprising:

• a housing having a front face;
• an actuator supported for axial motion in said housing and positionable between a first axial position and a second axial position;
• a first chucking mechanism including a first equalizing plate pivotally connected to said actuator so as to move axially therewith and rotate relative thereto, a first pair of rocker arms pivotally coupled to said housing, each of said first pair of rocker arms having a first end extending through said front face, a second end opposite said first end, a jaw member secured to said first end, a counterweight secured to said second end and a toggle link operably connecting said second end to said first equalizing plate;
• a second chucking mechanism including a second equalizing plate pivotally connected to said actuator so as to move axially therewith and rotate relative thereto, a second pair of rocker arms pivotally coupled to said housing, each of said second pair of rocker arms having a first end extending through said front face, a second end opposite said first end, a jaw member secured to said first end, a counterweight secured to said second end and a toggle link operably connecting said second end to said second equalizing plate;
• a third chucking mechanism including a third equalizing plate pivotally connected to said actuator so as to move axially therewith and rotate relative thereto, a third pair of rocker arms pivotally coupled to said housing, each of said third pair of rocker arms having a first end extending through said front face, a second end opposite said first end, a jaw member secured to said first end, a counterweight secured to said second end and a toggle link operably connecting said second end to said third equalizing plate;
• wherein axial movement of said actuator between said first position and said second position pivots said rocker arms, thereby moving said jaw members between an open position and an closed position.

A equalizing chuck assembly comprising:

• a housing having a front face;
• a plurality of rocker arms, each of said plurality of rocker arms pivotally coupled to said housing and having a first end extending through said front face and a second end;
• a plurality of jaw members, each of said plurality of jaw members disposed on said first end of each of said plurality of rocker arms;
• a plurality of counterweights, each of said plurality of counterweights disposed on said second end of each of said plurality of rocker arms;
• an actuator supported for axial motion in said housing and positionable between a first axial position and a second axial position;
• a plurality of equalizing plates pivotally coupled to said actuator with a pivot pin to permit relative rotational movement therebetween, each of said plurality of equalizing plates having a bearing assembly disposed therein;
• a plurality of toggle links, each of said plurality of toggle links operably coupling one of said plurality of rocker arms to said actuator through said bearing assembly;
• wherein axial movement of said actuator between said first position and said second position pivots said plurality of rocker arms, thereby moving said jaw members between an open position and an closed position.