Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
158 words
An ultrasonic transducer device, comprising: a plurality of adjacent layers of polarized piezoelectric material, each layer having a polarization direction which is opposite to the polarization direction of the adjacent layer; conductive electrodes disposed on said layers of piezoelectric material such that each layer of piezoelectric material has electrodes on opposing surfaces thereof, with electrodes being shared between adjacent layers; a series string of delay means, each including inductive elements alternating with connecting terminals; every other electrode being coupled to respective connecting terminals of said series string of delay means, and the remaining electrodes being coupled to a common terminal; an input/output terminal coupled to an end of said series string of delay means, an input or output signal being applied or received between said input/output terminal and said common terminal; the time delay of each delay means being substantially equal to the ultrasonic wave propagation time through the piezoelectric material across which the delay means is coupled.
Claim 2
Dependent Claim
158 words
An ultrasonic transducer device, comprising: a plurality of adjacent layers of polarized piezoelectric material, each layer having a polarization direction which is opposite to the polarization direction of the adjacent layer; conductive electrodes disposed on said layers of piezoelectric material such that each layer of piezoelectric material has electrodes on opposing surfaces thereof, with electrodes being shared between adjacent layers; a series string of delay means, each including inductive elements alternating with connecting terminals; every other electrode being coupled to respective connecting terminals of said series string of delay means, and the remaining electrodes being coupled to a common terminal; an input/output terminal coupled to an end of said series string of delay means, an input or output signal being applied or received between said input/output terminal and said common terminal; the time delay of each delay means being substantially equal to the ultrasonic wave propagation time through the piezoelectric material across which the delay means is coupled.
Claim 3
Dependent Claim
17 words
The transducer device as defined by claim 1, wherein said polarized piezoelectric material is a polarized plastic.
Claim 4
Dependent Claim
144 words
An ultrasonic transducer device, comprising: a plurality of adjacent layers of polarized piezoelectric material, each layer having a polarization direction which is opposite to the polarization direction of the adjacent layer; conductive electrodes disposed on said layers of piezoelectric material such that each layer of piezoelectric material has electrodes on opposing surfaces thereof; first and second series string of delay means, each including inductive elements alternating with connecting terminals; every other electrode being coupled to respective connecting terminals of said first series string of delay means, and the remaining electrodes being coupled to respective connecting terminals of said second series string of delay means; input/output terminals coupled to respective ends of said series strings of delay means; the time delay of each delay means being substantially equal to the ultrasonic wave propagation time through the piezoelectric material across which the delay means is coupled.
Claim 5
Dependent Claim
144 words
An ultrasonic transducer device, comprising: a plurality of adjacent layers of polarized piezoelectric material, each layer having a polarization direction which is opposite to the polarization direction of the adjacent layer; conductive electrodes disposed on said layers of piezoelectric material such that each layer of piezoelectric material has electrodes on opposing surfaces thereof; first and second series string of delay means, each including inductive elements alternating with connecting terminals; every other electrode being coupled to respective connecting terminals of said first series string of delay means, and the remaining electrodes being coupled to respective connecting terminals of said second series string of delay means; input/output terminals coupled to respective ends of said series strings of delay means; the time delay of each delay means being substantially equal to the ultrasonic wave propagation time through the piezoelectric material across which the delay means is coupled.
Claim 6
Dependent Claim
17 words
The transducer device as defined by claim 3, wherein said polarized piezoelectric material is a polarized plastic.