Ultrasonic working apparatus

In an ultrasonic working apparatus having an ultrasonic vibrator, improved means for transferring vibratory working forces from the vibrator to a workpiece, comprising:

• a booster horn including a coaxially aligned rod member and plate member, said rod member having one end coaxially coupled to said vibrator, and an opposite end, said plate member having one end coaxially coupled to said opposite end of the rod member, and an opposite end provided with distal workpiece engaging means, said plate member having a thickness at said opposite end thereof less than the thickness at said one end thereof and a width at said opposite end thereof substantially greater than the width at said one end thereof, said workpiece engaging means comprising spaced projections at opposite ends of the widthwise extent of said opposite end of the plate member, the axial length of said plate member being substantially equal to the axial length of said rod member, said plate member being associated with the rod member substantially centered therewith at said rod member one end and said plate member opposite end;
• and
• an annular support disposed concentrically thereabout defining the midportion of the booster horn.

In an ultrasonic working apparatus having an ultrasonic vibrator, improved means for transferring vibratory working forces from the vibrator to a workpiece, comprising

• a booster horn including a coaxially aligned rod member and plate member, said rod member having one end coaxially coupled to said vibrator, and an opposite end, said plate member having one end coaxially associated with said opposite end provided with distal workpiece engaging means, said plate member having a thickness at said opposite end thereof less than the thickness at said one end thereof and a width at said opposite end thereof substantially greater than the width at said one end thereof, said workpiece engaging means comprising spaced projections at opposite ends of the widthwise extent of said opposite end of the plate member, said associated opposite end of the rod member and said one end of the plate member defining a circular cross section.