Joints and connections – Split end with laterally movable opposed portions – With separate force-applying means
Patent
1986-02-26
1988-03-01
Husar, Cornelius J.
Joints and connections
Split end with laterally movable opposed portions
With separate force-applying means
403 31, 403297, 294 864, 294 8624, 294906, 294 96, 376260, 269 481, 29252, B23Q 300, B66C 124, F16B 214
Patent
active
047282177
ABSTRACT:
A gripper with leaf springs having fingers near their ends to engage and disengage work. The springs are respectively connected in an annular array to the end of a cylindrical support. The springs are diverged or expanded to cause the fingers to engage the work and are converged or collapsed to cause the fingers to disengage the work. During the diverging and the converging each spring is pivoted about its junction with the support. The diverging and the converging of the springs is effected by an actuator or mandrel including a rod having a nose at its outer end. The actuator is reciprocable within the springs between advanced and retracted positions. Near its outer end the rod has a conical cam surface which engages cooperative internal cam-follower surfaces on the springs to diverge the springs when the actuator is in advanced position. The nose has a skirt which engages the outer ends of the springs, i.e. the fingers, to converge the springs near the ends when the actuator is in retracted position. The joint between each spring and the support is flexed radially outwardly from an unstressed neutral position to diverge the springs and radially inwardly from the neutral position to converge the springs. The range of the flexing in each direction is within the elastic limit of the material of the joint. Thus the leaf springs remain resilient and fatigue as a result of repeated flexing of the joints is precluded.
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Husar Cornelius J.
Westinghouse Electric Corp.
Williams Todd G.
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