Echo sounder transducer

Details Echo sounder transducer Echo sounder transducer

2007-07-31

2007-07-31

Schuberg, Darren (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

Reexamination Certificate

active

11169742

ABSTRACT:
The present invention achieves the wideband operation of a bolted Langevin-type echo sounder transducer by enabling low frequency operation with securing a sound pressure level above a certain level without changing the external dimensions of the echo sounder transducer. This is an echo sounder transducer includes a Langevin-type vibrator having a front mass and a rear mass, and a cylindrical active vibrator which is sandwiched between the front mass and rear mass, a bend vibrator constituted of a diaphragm arranged in an acoustic radiation surface section of the front mass of the Langevin-type vibrator, and a disc type active vibrator fixed to the diaphragm. This has such structure that a slit, communicating from an outer peripheral side face toward an axial center, is provided on the circumference in the side of the lower portion of the front mass of the Langevin-type vibrator toward the rear mass.

REFERENCES:
patent: 4633119 (1986-12-01), Thompson
patent: 5998908 (1999-12-01), Goodson
patent: 6181052 (2001-01-01), Puskas
patent: 7019439 (2006-03-01), DeCastro et al.
patent: 2000-209690 (2000-07-01), None
patent: 2001-148896 (2001-05-01), None
patent: 2003-032771 (2003-01-01), None
patent: 200332771 (2003-01-01), None

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