(under subclass 321) Subject matter in which the piezoelectric element or elements are coupled to a front and/or rear mass, which combined structure is disclosed as being resonant at the operating wavelength.
(1) Note. Devices of this subclass type may consist of, for example, a piezoelectric element connected to the wall of a cleaning tank, the combined structure being resonant at the operating wavelength or a piezoelectric element connected to a mechanical amplifier (horn) and a tool, the combined structure being resonant at the operating wavelength. Devices of this subclass type may be referred to as the Boldine type.
SEE OR SEARCH CLASS
366, Agitating, Cross-Reference Art Collection, 600 for similar resonant structures.
