Abstract: An equalizing chuck includes a body, a plurality of work engaging jaws, and a plurality of rocker arms carrying the jaws. The rocker arms extends axially along an axis and have a mounting portion at one axial end for the jaws and an end portion at the other axial end. The equalizing chuck also includes a plurality of swivel mountings connecting the rocker arms to the body, a plurality of slide members receiving the end portions of the rocker arms, a reciprocal actuator disposed centrally of the rocker arms, and a plurality of segments slidably secured to the actuator. The segments are operative to move in a radial manner with respect to a centerline of the body and operatively cooperate with the slide members such that reciprocatory movement of the actuator moves the segments and correspondingly the slide members to move the jaws relative to each other.

Abstract: A power chuck includes a body, a plurality of work engaging jaws, a plurality of rocker arms carrying the jaws, and a plurality of swivel mountings connecting the rocker arms to the body. The power chuck also includes a plurality of slide members connected to and matingly engaging the rocker arms and a reciprocable actuator disposed centrally of the rocker arms and operatively cooperating with the slide members. Reciprocatory movement of the actuator along the slide members rocks the rocker arms in the swivel mountings and moves the jaws radially relative to each other.