Patent ID: 6198207
Filing Date: 2001-03-06
Classification: G01P,H01L,Y10T

Abstract:
A piezoelectric transducer comprising a housing and a transducer subassembly,said transducer subassembly being secured to an inner wall of said housing in a manner defining at least a first chamber and a second chamber within said housing on opposing sides of said transducer subassembly;said transducer subassembly further comprising a piezoelectric element operatively coupled to a stress/strain-transmitting element;wherein said piezoelectric element and said stress/strain transmitting element are affixed in position within said housing by a low-shrink solder whose volume changes less than about 2.5% in cooling from a liquid state to a solid state, said transducer assembly having a passage through said subassembly permitting fluid communication between said first and said second chambers.