Patent ID: 8137371

Claim:
An end effector for an ultrasonic surgical instrument, comprising: a first resonant member having a body portion and an operating surface extending distally therefrom; a second resonant member having a body portion and an operating surface extending distally therefrom; a first transducer directly connected to the first resonant member, the first transducer configured for effecting vibrations along the operating surface of the first resonant member; and a second transducer directly connected to the second resonant member, the second transducer configured for effecting vibrations along the operating surface of the second resonant member, wherein the first resonant member and the second resonant member are laminated together and are staggered longitudinally relative to one another such that a distal end of the first resonant member and a distal end of the second resonant member are longitudinally spaced apart from one another so that a displacement curve associated with the vibrations of the first resonant member is offset relative to the displacement curve associated with the vibrations of the second resonant member.