US PATENT SUBCLASS 310 / 316.01
.~.~.~ Input circuit for simultaneous electrical and mechanical output from piezoelectric element

Current as of: June, 1999
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310 /   HD   ELECTRICAL GENERATOR OR MOTOR STRUCTURE

300  DF  NON-DYNAMOELECTRIC {4}
311  DF  .~ Piezoelectric elements and devices {17}
314  DF  .~.~ Electrical systems {5}
316.01.~.~.~ Input circuit for simultaneous electrical and mechanical output from piezoelectric element {2}
316.02  DF  .~.~.~.~> Traveling wave motor
316.03  DF  .~.~.~.~> Charging and discharging

DEFINITION

Classification: 310/316.01

Input circuit for simultaneous electrical and mechanical output from piezoelectric element:

(under subclass 314) Subject matter wherein (a) electrical energy is supplied to the piezoelectric element and (b) the piezoelectric element has an electrical output and a

mechanical output both of which are utilized.

(1) Note. Subject matter of this subclass type may include feedback circuits.

(2) Note. A device such as a nondestructive testing unit which is electrically excited to produce an acoustic wave output and then receives the returning acoustic wave and converts that into an electric output is viewed as having sequential rather than simultaneous outputs for classification purposes under subclass 314. Thus, such a device which includes electric-circuit elements for both input and output would usually be classified in subclasses 317 or 319 rather than in this subclass.

SEE OR SEARCH THIS CLASS, SUBCLASS:

318, for the combination of an electric circuit element and an electrical resonator comprised of a piezoelectric device which converts an alternating electrical input voltage to mechanical motion which is entirely converted by the piezoelectric device itself back to an alternating electrical output voltage having the same frequency as, and in phase with the input voltage.

321, for such piezoelectric devices, per se, which include some structure other than the piezoelectric element itself to mechanically establish the resonant frequency of the device.

326, for such piezoelectric devices wherein the resonant frequency is established by mechanically damping undesired frequencies. 348+, for such piezoelectric devices, per se, in which the piezoelectric element itself determines the resonant frequency.