Ethicon, Gmbh

Cilag International Gmbh

Ethicon Endo-Surgery, Inc.

Shawn D Bialczak

Kevin L Houser

Foster B Stulen

Timothy G Dietz

Daniel J Mumaw

Sora Rhee

Craig T Davis

John A Weed, Iii

Kip M Rupp

Ashvani K Madan

Aaron C Voegele

Shan Wan

Scott A Nield

John A Iii Weed

A surgical instrument includes a rotatable electrical coupling assembly having a first part and a second part that electrically couple and rotate relative to each other. The second part is carried by and rotates with a tube collar coupled to a transducer. A portion of the transducer is inserted through an aperture of the second part, but does not contact the second part. The first part of the assembly may electrically couple to the second part via pogo pins, brush contacts, or ball bearings. Alternatively, the first part may comprise conductive channels formed in the casing. The second part may comprise a rotatable drum with a conductive trace. In some versions, one or more components may comprise MID components. In another version, the rotatable electrical coupling assembly comprises a rotatable PC board and brush contact. Further still, a circuit board may be provided with the transducer inside a transducer casing.

Surgical instrument with slip ring assembly to power ultrasonic transducer

In one general aspect, various embodiments are directed to an ultrasonic surgical instrument that comprises a transducer configured to produce a standing wave of vibrations along a longitudinal axis having a node and an anti-node at a predetermined frequency. In various embodiments, an ultrasonic blade extends along the longitudinal axis and is coupled to the transducer. In various embodiments, the ultrasonic blade includes a body having a proximal end and a distal end, wherein the distal end is movable relative to the longitudinal axis by the vibrations produced by the transducer. In one general aspect, various embodiments are directed to a method of assembling the transducer for the ultrasonic surgical instrument. In various embodiments, the method comprises selecting piezoelectric elements and arranging the piezoelectric elements relative to the node to minimize the difference in magnitude between the currents drawn by the piezoelectric elements.

Method of assembling a transducer for a surgical instrument

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Ft. Thomas, KY, United States of America

Shawn D Bialczak