Surgical instrument for ultrasonic separation of biological tissue
Patent 4188952 Issued on February 19, 1980. Estimated Expiration Date: 
September 12, 1998. 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.
September 12, 1998. 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 ReferencesInventorsApplicationNo. 05/941796 filed on 09/12/1978US Classes:606/79, Orthopedic cutting instrument30/355, Toothed or waved606/169, Cutter having vibratory drive means606/170, Cutter carried on elongated probe-like member83/956ULTRASONICExaminersPrimary: Howell, Kyle L.Attorney, Agent or FirmInternational ClassesA61B 17/32 (20060101)A61B 17/322 (20060101) AbstractThe instrument connected to an ultrasonic oscillations source is provided with a knife to perform longitudinal mechanical oscillations at ultrasonic frequency during tissue separation. The working portion of the knife is essentially a plate made of a titanium alloy and having a pentogonal cross-section, a smooth rounding at the end thereof and two rows of teeth of triangular and wave-like shapes for separating osseous and cartilaginous tissue, respectively. A specific dimensional geometry of the instrument knife is described. | |
