Patent ID: 7573183

Claim:
An apparatus for producing pressure oscillation of a fluid when an oscillating voltage is applied, comprising: a flextensional acoustical transducer comprising: a tubular frame covered by an elastomeric molding; a first endplate having at least one hole for passing therethrough electrical wires secured to one end of said frame and a second endplate secured to another end thereof; a driving member disposed longitudinally and adjoining said first endplate and said second endplate; voltage supplying means for energizing said driving member operating in response thereto to apply force to said first endplate and said second endplate thereby causing said frame and said molding to deform elastically; and a housing that envelops said frame and which is sealed thereto with a cover, aid housing comprising at least one fluid flow channel for fluid to flow therethrough to surround the elastomeric molding of said frame.