US 12,427,059 B2
Ultrasonic handpiece assembly
Larry Clayton, Farmington, UT (US)
Assigned to Zevex, Inc., Salt Lake City, UT (US)
Filed by ZEVEX, INC., Salt Lake City, UT (US)
Filed on May 10, 2023, as Appl. No. 18/195,450.
Prior Publication US 2024/0374423 A1, Nov. 14, 2024
Int. Cl. A61F 9/007 (2006.01); B06B 1/06 (2006.01)
CPC A61F 9/00745 (2013.01) [B06B 1/0614 (2013.01); B06B 2201/76 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An ultrasonic handpiece assembly comprising:
a horn elongated along a longitudinal axis, the horn including a rear end, a front end opposite the rear end, and a horn lumen extending axially through the horn;
a rear mass attached to the rear end of the horn, the rear mass having a rear mass lumen extending axially through the rear mass and communicating with the horn lumen;
a plurality of piezoelectric elements arranged coaxially about the horn in a stack; and
an L-T spring arranged coaxially about the horn axially behind the stack of piezoelectric elements;
wherein the horn includes a low gain section axially in front of the stack of piezoelectric elements and a high gain section axially in front of the low gain section, wherein the high gain section has a transverse cross-sectional area less than a transverse cross-sectional area of the low gain section;
wherein the low gain section of the horn includes a circumferential groove;
wherein the ultrasonic handpiece assembly has a first L-T mode at a first resonant frequency, a T mode at a second resonant frequency, a second L-T mode at a third resonant frequency, and an L mode at a fourth resonant frequency; and
wherein the circumferential groove is arranged at an axial location corresponding to a vibrational node of the first L-T mode.