Surgical cutting instrument with titanium nitride coating on an inner tubular member
Patent 5061238 Issued on October 29, 1991. Estimated Expiration Date: 
April 25, 2010. 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.
April 25, 2010. 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 ReferencesSurgical instrument suitable for closed surgery such as of the knee Tubular microsurgery cutting apparatus Surgical cutting instrument with titanium nitride coating on an inner tubular member Patent #: 4923441 InventorAssigneeApplicationNo. 513291 filed on 04/25/1990US Classes:604/22, With means for cutting, scarifying, or vibrating (e.g., ultrasonic, etc.) tissue606/170Cutter carried on elongated probe-like memberExaminersPrimary: Rosenbaum, C. FredAssistant: Lewis, William Attorney, Agent or FirmInternational ClassA61B 017/32AbstractA surgical cutting instrument having elongate inner and outer tubular members with distal ends cooperating to cut bodily tissue and aspirate the cut bodily tissue through the inner tubular member includes a coating of titanium nitride formed on the inner tubular member to extend from the distal end to the proximal end thereof such that the titanium nitride coating forms an elongate bearing surface extending along the length of the surgical cutting instrument to prevent cocking or skewing of the inner tubular member relative to the outer tubular member, to increase the surface hardness of the inner tubular member, to reduce the coefficient of friction of the inner tubular member and to prevent galling and possible seizure of the inner tubular member by distributing or dispersing heat along the surgical cutting instrument while reducing the clearance between the outer diameter of the inner tubular member and the inner diameter of the outer tubular member.Field of SearchCutter drive reversed to clean material therefromCutter carried on elongated probe-like member Recriprocating or oscillating cutter With means for cutting, scarifying, or vibrating (e.g., ultrasonic, etc.) tissue Liner on shaft Specified cooling means With cooling, heating or insulating COOLING OR HEATING Metallic Metallic compounds TOOL OF SPECIFIC DIVERSE MATERIAL Metallic compound particles | |
