Ultrasonic aspirator
Patent 4223676 Issued on September 23, 1980. Estimated Expiration Date: 
December 19, 1997. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 19, 1997. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References Re25033 2723386 2990616 3113225 3213537 3375583 3589363 3693613 3805787 InventorsAssigneeApplicationNo. 05/861599 filed on 12/19/1977US Classes:604/22, With means for cutting, scarifying, or vibrating (e.g., ultrasonic, etc.) tissue366/127, By electrostrictive or magnetostrictive transducer433/86, Ultrasonic tool604/43, Body inserted conduit with separate ingress and egress passages606/169Cutter having vibratory drive meansExaminersPrimary: Michell, Robert W.Assistant: Kruter, J. L. Attorney, Agent or FirmInternational ClassesA61B 17/22 (20060101)A61B 17/32 (20060101) A61M 1/00 (20060101) AbstractApparatus for the surgical removal of tissue is disclosed comprising a handpiece having a resonant vibrator with a magnetostrictive stack and connecting body encompassing a hollow elongated tool which is ultrasonically vibrated at its tip longitudinally to a peak to peak stroke of at least 0.005 inches at about 25,000 cps (25 KHz). A generator powers the vibrator and is automatically controlled at the frequency to maintain the resonant vibration. Aspiration is provided by suction through the hollow tool at its tip, and a manifold enclosing the tool end of the handpiece provides irrigation.Other References
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