US2013322216A1PendingUtilityA1

Ultrasonic transducer for parametric array

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Assignee: POMPEI FRANK JOSEPHPriority: Oct 9, 2001Filed: Jun 24, 2013Published: Dec 5, 2013
Est. expiryOct 9, 2021(expired)· nominal 20-yr term from priority
Inventors:Frank Joseph Pompei
B06B 1/0292H04R 31/00H04R 19/02B82Y 30/00B06B 1/0622B82Y 10/00
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Claims

Abstract

An ultrasonic transducer having a reduced cost of manufacture. The ultrasonic transducer includes a first insulative retaining layer, a second insulative retaining layer, and a vibrator film layer sandwiched between the first and second retaining layers. The first retaining layer includes a first plurality of apertures formed therethrough, and the second retaining layer includes a second plurality of apertures formed therethrough, in which the second apertures are substantially in registration with the first apertures. The ultrasonic transducer further includes a first cover portion having a plurality of spring/backplate assemblies connected thereto, and a second cover portion. The combination of the first retaining layer, the vibrator film layer, and the second retaining layer is sandwiched between the first and second cover portions of the ultrasonic transducer. The laminated construction of the ultrasonic transducer allows the formation of an array of ultrasonic film transducers using a single piece of ultrasonic vibrator film.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . An ultrasonic transducer, comprising:
 a vibrator surface operative to generate one or more ultrasonic compression waves; and   a protective cover disposed on one side of the vibrator surface to allow the ultrasonic compression waves to pass therethrough,   wherein the protective cover and the vibrator surface are spaced apart a predetermined distance sufficient to minimize absorption and transmission losses due to the protective cover.   
     
     
         2 . The ultrasonic transducer of  claim 1  further comprising:
 a spacer element operative to maintain the protective cover and the vibrator surface spaced apart at the predetermined distance. 
 
     
     
         3 . The ultrasonic transducer of  claim 1  wherein the protective cover and the vibrator surface are spaced apart by the predetermined distance to minimize absorption and transmission losses for a specified carrier frequency of the ultrasonic transducer. 
     
     
         4 . The ultrasonic transducer of  claim 3  wherein the protective cover and the vibrator surface are spaced apart by the predetermined distance to minimize absorption and transmission losses for one or more specified frequencies near the specified carrier frequency. 
     
     
         5 . The ultrasonic transducer of  claim 3  wherein the predetermined distance is sufficient to allow generation of a standing wave between the protective cover and the vibrator surface at approximately the specified carrier frequency. 
     
     
         6 . The ultrasonic transducer of  claim 1  wherein the protective cover includes a protective layer and a fabric layer. 
     
     
         7 . The ultrasonic transducer of  claim 6  wherein the fabric layer is disposed against the protective layer. 
     
     
         8 . The ultrasonic transducer of  claim 6  wherein the fabric layer and the protective layer are spaced apart a second predetermined distance sufficient to minimize absorption and transmission losses due to the protective cover. 
     
     
         9 . The ultrasonic transducer of  claim 6  wherein the fabric layer and the vibrator surface are spaced apart a second predetermined distance sufficient to minimize absorption and transmission losses due to the protective cover. 
     
     
         10 . The ultrasonic transducer of  claim 1  wherein the protective cover is a layer of fabric. 
     
     
         11 . The ultrasonic transducer of  claim 1  wherein the predetermined distance is about ½ of the wavelength of an ultrasonic wave generated by the ultrasonic transducer. 
     
     
         12 . The ultrasonic transducer of  claim 1  wherein the predetermined distance to minimize absorption and transmission losses due to the protective cover corresponds to a minimum distance for a specified frequency of the ultrasonic transducer. 
     
     
         13 . The ultrasonic transducer of  claim 1  wherein the predetermined distance to minimize absorption and transmission losses due to the protective cover corresponds to a minimum distance for a specified wavelength of an ultrasonic wave generated by the ultrasonic transducer. 
     
     
         14 . The ultrasonic transducer of  claim 1  wherein the protective cover is connected to ground potential.

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