US 11,771,398 B1
Fetal heart rate transducer
Arun Narayan Patil, Winder, GA (US); Anand Raghunath Bhave, Pune (IN); Sunanda Narayan Patil, Pune (IN); and Pratibha Narayan Patil, Pune (IN)
Assigned to Aronix LLC, Peachtree Corners, GA (US)
Filed by Aronix LLC, Peachtree Corners, GA (US)
Filed on Dec. 2, 2022, as Appl. No. 18/74,222.
Int. Cl. A61B 8/08 (2006.01); A61B 8/00 (2006.01); B06B 1/02 (2006.01); B06B 1/06 (2006.01)
CPC A61B 8/0866 (2013.01) [A61B 8/0883 (2013.01); A61B 8/54 (2013.01); A61B 8/587 (2013.01); B06B 1/0215 (2013.01); B06B 1/0633 (2013.01); B06B 2201/76 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An improved fetal heart rate transducer comprising:
a top case;
an ultra slow-cure epoxy;
a bottom case fastens to the top case, the bottom case comprises an interior surface, the interior surface comprises more than one of a standoff, and de-embossed or raised more than one of a piezo-electric crystal (PZT) pad;
more than one of a metal insert is molded into place within the standoff as the bottom case is fabricated; and
more than one of a PZT disc having a top side and an epoxy side, each of the PZT disc adheres to the PZT pad as follows:
cleaning the interior surface and the PZT disc;
mixing and degassing in a vacuum, for a first degas time period, the ultra slow-cure epoxy;
depositing a drop of the ultra slow-cure epoxy in center of the epoxy side of each of the PZT disc while the PZT disc is resting on horizontal surface with the epoxy side up, or the PZT pad while the bottom case is resting on horizontal surface;
allowing the drop to self-level for a first self-leveling time period;
placing the epoxy side of each of the PZT disc on each of the PZT pad while the bottom case is resting on horizontal surface; and
allowing the PZT disc and the bottom case assembly to cure for a first cure time period.