Cardiac Pacemakers, Inc.

Timothy P Linger

Kevin J Persuitti

Toua Vang

A connector block and associated locking setscrew for an implantable electronic tissue stimulating device are designed to eliminate thread damage to the setscrew which is a cause of the setscrew becoming stuck in the connector block. The threaded bore in the connector that is adapted to receive the setscrew is provided with an undercut at the end of the threaded bore where the undercut provides an annular, 360-degree flat surface that is normal to the longitudinal axis of the setscrew receiving bore. The setscrew employed is designed to have a shoulder machined a predetermined distance below the terminus of the final thread by machining a reduced diameter portion on the distal end of the setscrew. Now, when the setscrew is inserted into its threaded bore, the shoulder on the setscrew and the flat surface on the undercut in the connector block meet, preventing any portion of the screw threads from extending beyond the internal threads formed in the setscrew receiving bore of the connector block.

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Wadsworth, OH, United States of America

Timothy P Linger