Patent ID: 6278658
Filing Date: 2001-08-21
Classification: G10K

Abstract:
A push-pull electro-acoustic transducer assembly which comprises:a) a convex flextensional transducer which comprises a hollow, elliptical shell comprising a pair of convex side walls meeting at opposing ends; said walls and ends delineating opposing open sides; a piezoelectric ceramic stack positioned in the hollow elliptical shell and extending between the opposing ends and adapted to exert a force on the opposing ends and strain the convex side walls when the stack is subjected to sufficient driving voltage through electrodes bonded to the stack;b) a concave flextensional transducer which comprises a hollow, hyperbolic shell comprising a pair of concave side walls each connected to opposing end walls; said side walls and end walls delineating opposing open sides; a piezoelectric ceramic stack positioned in the hollow, hyperbolic shell and extending between the opposing ends and adapted to exert a force on the opposing ends and strain the concave side walls when the stack is subjected to sufficient driving voltage through electrodes bonded to the stack;c) one open side of the convex transducer being attached to an open side of the concave transducer by an intermediate bulkhead, which bulkhead closes each of said attached open sides; andd) an end plate attached to another open side of the convex transducer shell and another end plate attached to another open side of the concave transducer shell, which end plates close said attached open sides.