US 11,883,055 B2
Ultrasonic surgical instrument with piezoelectric central lumen transducer
Sora Rhee, Spring Mills, PA (US); Jacob S. Gee, Cincinnati, OH (US); Steven P. Smolik, West Chester, OH (US); Stephen J. Balek, Springboro, OH (US); and William D. Dannaher, Cincinnati, OH (US)
Assigned to Cilag GmbH International, Zug (CH)
Filed by Cilag GmbH International, Zug (CH)
Filed on Mar. 29, 2021, as Appl. No. 17/215,234.
Application 17/215,234 is a division of application No. 16/170,788, filed on Oct. 25, 2018, granted, now 10,966,744.
Application 16/170,788 is a division of application No. 15/626,768, filed on Jun. 19, 2017, granted, now 10,245,064, issued on Apr. 2, 2019.
Claims priority of provisional application 62/381,785, filed on Aug. 31, 2016.
Claims priority of provisional application 62/361,136, filed on Jul. 12, 2016.
Prior Publication US 2021/0236157 A1, Aug. 5, 2021
Int. Cl. B06B 1/06 (2006.01); A61B 17/32 (2006.01); B06B 3/00 (2006.01); A61B 17/00 (2006.01); A61B 17/22 (2006.01)
CPC A61B 17/320068 (2013.01) [A61B 17/320092 (2013.01); B06B 1/0611 (2013.01); B06B 3/00 (2013.01); A61B 2017/0011 (2013.01); A61B 2017/00084 (2013.01); A61B 2017/00402 (2013.01); A61B 2017/00504 (2013.01); A61B 2017/22027 (2013.01); A61B 2017/320071 (2017.08); A61B 2017/320084 (2013.01); A61B 2017/320094 (2017.08); B06B 1/0614 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A transducer assembly comprising:
a housing comprising a conduit section and a base portion, wherein a fluid passageway is defined through the conduit section and the base portion;
a conductive element at least partially surrounding the conduit section of the housing;
an insulator positioned between the conductive element and the conduit section, wherein the insulator is configured to electrically isolate the conductive element from the conduit section;
an ultrasonic transducer comprising a plurality of piezoelectric elements and a plurality of electrodes arranged in a stack configuration, wherein the ultrasonic transducer comprises a first end and a second end;
a first borehole defined through the ultrasonic transducer;
an end mass comprising a second borehole defined therethrough, wherein the end mass is positioned adjacent to a first end of the ultrasonic transducer and the end mass is configured to engage with the housing; and
wherein:
the conduit section of the housing is configured to pass through the first borehole of the ultrasonic transducer and the second borehole of the end mass,
the end mass is configured to compress the ultrasonic transducer against a surface of the housing when the end mass is engaged with the housing, and
a first piezoelectric element of the plurality of piezoelectric elements and a second piezoelectric element of the plurality of piezoelectric elements are electrically connected in parallel.