Medical machine for performing surgery and treating using ultrasonic energy
First Claim
1. An ultrasonic medical instrument comprising an ultrasonic oscillator, a handpiece, an ultrasonic motor mounted in said handpiece and electrically connected to said ultrasonic oscillator, a tool and transition horn connected to said ultrasonic motor and the combination having a wave length equal to nλ
- /2 where n is an integer and λ
is the wave length of the operating frequency of said motor and wherein a portion of said tool is tapered to mate with said geometry of the transition horn so as to prevent mismatch and is a continuous extension of said horn, and wherein said internal ultrasonic motor consists of a cylindrical rear piece of steel, lead-zirconate-titanate crystals mounted adjacent one end of said rear piece and a front piece of titanium mounted adjacent said crystals and having a portion which is geometrically tapered, and said tool formed with a taper such that its diameter at the connection point to said front piece is the same as the end of said front piece.
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Accused Products
Abstract
A machine for performing surgery and treatment utilizing ultrasonic energy wherein so as to obtain precise control of the operating frequency and eliminate unnecessary heating and loss of power the hand tool as well as the generator and power supply are designed after establishing the designed criteria of the particular medical tool required thus allowing coupling of energy into the tool in a very efficient manner. Means are also provided for assuring that dangerous transverse modes of the instrument used will not occur which can cause injury to patients. Several unique additional safety and construction features are also shown.
253 Citations
34 Claims
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1. An ultrasonic medical instrument comprising an ultrasonic oscillator, a handpiece, an ultrasonic motor mounted in said handpiece and electrically connected to said ultrasonic oscillator, a tool and transition horn connected to said ultrasonic motor and the combination having a wave length equal to nλ
- /2 where n is an integer and λ
is the wave length of the operating frequency of said motor and wherein a portion of said tool is tapered to mate with said geometry of the transition horn so as to prevent mismatch and is a continuous extension of said horn, and wherein said internal ultrasonic motor consists of a cylindrical rear piece of steel, lead-zirconate-titanate crystals mounted adjacent one end of said rear piece and a front piece of titanium mounted adjacent said crystals and having a portion which is geometrically tapered, and said tool formed with a taper such that its diameter at the connection point to said front piece is the same as the end of said front piece. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
- /2 where n is an integer and λ
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17. An ultrasonic medical instrument comprising an ultrasonic oscillator, a handpiece, an ultrasonic motor mounted in said handpiece and electrically connected to said ultrasonic oscillator, a tool and transition horn connected to said ultrasonic motor and the combination having a wave length equal to nλ
- /2 where n is an integer and λ
is the wave length of the operating frequency of said motor and wherein a portion of said tool is tapered to mate with said geometry of the transition horn so as to prevent mismatch and is an extension of said horn, wherein said internal ultrasonic motor consists of a cylindrical rear piece of steel, lead-zirconate-titanate crystals mounted adjacent one end of said rear piece and a front piece of titanium mounted adjacent said crystals and having a portion which is geometrically tapered, and said tool formed with a taper such that its diameter at the connection point to said front piece is the same as the end of said front piece, and wherein the connection point between said tool and said transition piece is essentially a nodal point. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
- /2 where n is an integer and λ
Specification