Patent · US Active

Doppler fetal heartbeat monitor

US10939893B2 · kind B2 · utility

0Cited by

6References

15Claims

0Family size

Assignee

EDAN INSTRUMENTS, INC. · CN

Inventors

Dong Huang · Hsinchu, TW
Dewei Chen · Nanhu, CN
Yong Wu · Shanghai, CN

Key dates

Filing date	Apr 10, 2017
Grant date	Mar 9, 2021
Priority date	—
Expiry date	Jan 4, 2039

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61B2503/02
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A Doppler fetal heartbeat monitor includes: a housing; a mainboard; a loudspeaker installed in the housing and electrically connected to the mainboard; and an ultrasonic transducer installed in the housing, electrically connected to the mainboard, and comprising at least one transduction wafer configured to generate an impulse wave, in which the ultrasonic transducer is internally provided at a head end of the housing, and the loudspeaker and the mainboard are internally provided at a tail end of the housing. By arranging the loudspeaker, the mainboard and the ultrasonic transducer in the housing, the Doppler fetal heartbeat monitor can have a compact structure and a small volume. Moreover, it is possible to reduce positive feedback of a sound system and a probability of a self-excited whistle.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.