Ultrasonic needle with sleeve that includes a baffle

Claim 1

An ultrasonic handpiece for performing operations comprising, an ultrasonic motor mounted in said handpiece, a tubular portion extending from said ultrasonic motor, a hollow needle attached to an end of said tubular portion, a conical portion of said ultrasonic handpiece extending around said tubular portion and a first cavity formed therebetween, an irrigating tube connected to said conical portion and supplying irrigating fluid to said first cavity, a flexible sleeve connected to an end of said conical portion and extending around said needle, a second cavity formed between said sleeve and said needle and fluidly connected to said first cavity, a planar baffle mounted in and across said sleeve and formed with a plurality of equally spaced openings which extend in a direction parallel to said needle, a third cavity formed between said sleeve and said needle and said second and third cavities in fluid communication through said plurality of said openings in said planar baffle, and an outlet opening formed in said sleeve and in fluid communication with said third cavity, said planar baffle mounted so that its plane extends in a direction which is 90 degrees to said needle, wherein suction is applied to said tubular portion for aspiration, and wherein a shoulder is formed at the junction of said tubular portion and said ultrasonic motor.