Expanding gripper with elastically variable pitch screw

Details Expanding gripper with elastically variable pitch screw Expanding gripper with elastically variable pitch screw

1996-10-03

1998-11-24

Keenan, James W.

Handling: hand and hoist-line implements

Grapple

Multiple grapples for multiple objects

294 65, 414416, 414750, B65B 3538

Patent

active

058397698

ABSTRACT:
An expandable gripper for semiconductor processing equipment that allows the pitch between semiconductor chips to be adjusted. To adjust the pitch, several pick and place mechanisms are mounted around a shaft using nuts. The threads of the nuts have variable leads, causing each to travel a different amount as the shaft rotates. All of the threads engage the shaft because a compliant layer is attached to the shaft.

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