Non-directional ultrasonic transducer

Details Non-directional ultrasonic transducer Non-directional ultrasonic transducer

1987-07-02

1989-04-18

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310337, 310369, 367155, 367159, H01L 4108

Patent

active

048230413

ABSTRACT:
A transducer is comprised of a piezoelectric ceramic cylindrical vibrator vibrating radially, and a sheet provided on an outer peripheral surface of the cylindrical vibrator and including a fiber reinforced composite material with fibers oriented only in the direction of central axis of the cylindrical vibrator. Non-piezoelectric cylinder consisting of Al alloy or Mg alloy may be useable instead of the sheet. Another type of transducer includes a cylindrical piezo-transducer vibrating radially, a cylindrical sound radiator with the central axis coincident with the cylindrical piezo-transducer, and a bending coupler provided at a predetermined interval on end surfaces of the two cylinders and coupling the cylindrical piezo-transducer and the cylindrical sound radiator. Other type of transducer is comprised of a cylindrical piezo-transducer vibrating radially, an outside cylindrical sound radiator with its central axis coincident with the central axis of the cylindrical piezo-transducer which contains the piezo-transducer therein, and a coupler extending radially from an outer peripheral surface of the cylindrical piezo-transducer to an inner peripheral surface of the cylindrical sound radiator, thereby coupling both the two.

REFERENCES:
patent: 3230505 (1966-01-01), Parker et al.
patent: 3509522 (1970-04-01), Whitfill, Jr.
patent: 3716828 (1973-02-01), Massa
patent: 4220887 (1980-09-01), Kompanek
patent: 4525645 (1985-06-01), Shirley et al.
patent: 4706229 (1987-11-01), Congdon

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