US PATENT SUBCLASS 310 / 347
.~.~.~ Compensated air gap

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


310 /   HD   ELECTRICAL GENERATOR OR MOTOR STRUCTURE

300  DF  NON-DYNAMOELECTRIC {4}
311  DF  .~ Piezoelectric elements and devices {17}
346  DF  .~.~ With temperature compensating structure {1}
347.~.~.~ Compensated air gap

DEFINITION

Classification: 310/347

Compensated air gap:

(under subclass 346) Subject matter wherein the device includes at least one electrode for the piezoelectric element which is spaced from the piezoelectric element to form an air gap, and the temperature compensating structure either keeps the air gap constant for changes in temperature, or else purposely varies the air gap so that the piezoelectric element's output remains constant for changes in temperature.