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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0044430 (1993-04-07) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 537 인용 특허 : 0 |
An ultrasonic and electrosurgical handpiece housing has an axis, a distal end, a proximal end and a passage defined by an inside wall. A piezo stack has elements carried along a plane generally transverse to the axis. A retainer for the elements has distal, intermediate and proximal portions. The di
An ultrasonic and electrosurgical handpiece housing has an axis, a distal end, a proximal end and a passage defined by an inside wall. A piezo stack has elements carried along a plane generally transverse to the axis. A retainer for the elements has distal, intermediate and proximal portions. The distal portion has a fastener; the proximal portion has a threaded shoulder bolt. The stack about the shoulder has an energy input and a reference output positioned axially apart from one another. An insulating sleeve about the bolt is between central openings of the elements and the bolt. A pair of insulators about the bolt has the stack therebetween; one insulator is between the plane and the stack and the other is near the threads. The intermediate portion attaches to the housing at the plane with decoupling and sealing. An irrigation channel conveys fluid. The drive energy input, the feedback signal and the reference outputs are insulated by the sleeve and pair from the bolt. A washer against the insulator and about the threads applies axial but not torsion to the insulator when a clamping nut on the threads holds components on the bolt. The clamping nut is in circuit with electrosurgical energy as the reference return for electrosurgery. A tool fastens to a connector for transmitting axial vibrations in the form of a predefined stroke at a tip thereof.
A piezo ultrasonic and electrosurgical handpiece comprising: a housing being elongated along its axis and having a distal end and a proximal end and a passage therethrough; a piezo transducer having a plurality of elements supported within the housing and mounted along a plane generally transverse t
A piezo ultrasonic and electrosurgical handpiece comprising: a housing being elongated along its axis and having a distal end and a proximal end and a passage therethrough; a piezo transducer having a plurality of elements supported within the housing and mounted along a plane generally transverse to the axis of the housing and the passage therealong; a retainer for the piezo elements, the retainer having a distal portion, intermediate portion and a proximal portion, the distal portion having a fastener positioned near the distal end of the housing, the proximal portion having an extended mandrel in the form of a shoulder bolt with proximally disposed threads, the intermediate portion attached to the housing with provisions for locating the retainer axial with respect thereto with decoupling therebetween; the piezo elements and a feedback crystal arranged in a stack of components, each component having a centrally located hole and an energy input and a reference output positioned axially apart from one another, the stack assembled on the shoulder bolt and positioned with the holes thereabout; an insulating sleeve disposed about the shoulder and sandwiched between the central openings of the stack and the shoulder of the bolt; a pair of insulators disposed about the retainer with the stack positioned between the insulators as a sandwich, one of the pair of insulators between the plane and the stack and the other insulator adjacent the threads and against the stack so an ultrasonic drive energy connected in circuit with the energy input of the elements, feedback signal and reference output in the stack are insulated by the sleeve and pair from the shoulder bolt; a washer located against the insulator and about the threads in position to apply axial but not torsional loads on the insulator and stack therebeneath; a clamping nut proximally located on the threads to hold the washer axially against the components on the shoulder bolt, the clamping nut including means for receiving an electrical source of electrosurgical energy, and electrical connections to the stack isolated from the clamping nut, the electrical connections including means for driving piezo elements, for receiving current flow through the piezo elements and for transmitting signals from the feedback crystal to cause controlled axial reciprocatory motion to be transmitted to the distal end of the retainer for conveyance to the fastener thereat and the plane of the retainer arranged at a node point of the axial reciprocatory motion.
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