US 11,871,956 B2
Medical scissors for microinvasive applications
Jochen Stefan, Tuttlingen (DE)
Assigned to KARL STORZ SE & Co. KG, Tuttlingen (DE)
Filed by KARL STORZ SE & Co. KG, Tuttlingen (DE)
Filed on Dec. 11, 2020, as Appl. No. 17/119,201.
Claims priority of application No. 10 2019 134 017.9 (DE), filed on Dec. 11, 2019.
Prior Publication US 2021/0177449 A1, Jun. 17, 2021
Int. Cl. A61B 17/3201 (2006.01); A61B 17/29 (2006.01)
CPC A61B 17/3201 (2013.01) [A61B 17/29 (2013.01); A61B 2017/2933 (2013.01); A61B 2017/2945 (2013.01); A61B 2017/2947 (2013.01)] 19 Claims
OG exemplary drawing
 
1. Medical scissors for microinvasive applications, the medical scissors comprising:
a first scissor blade with a first cutting edge between a first blade flank surface and a first blade beveled surface;
a second scissor blade with a second cutting edge between a second blade flank surface and a second blade beveled surface, the second scissor blade being movable in relation to the first scissor blade;
a guiding device for the mechanical guiding of the second scissor blade in relation to the first scissor blade such that the second cutting edge touches the first cutting edge at any time at a point of intersection, wherein:
the guiding device is rigidly connected to a shaft of a microinvasive instrument or is connectable to a shaft of a microinvasive instrument;
the first cutting edge is configured based on a first parameter which increases several times and decreases several times along the first cutting edge;
the second cutting edge is configured based on a second parameter which increases several times and decreases several times along the second cutting edge;
the first parameter is a wedge angle between the first blade flank sur and the first blade beveled surface, or a first cutting edge cutting angle, or a width of the first blade beveled surface;
the second parameter is a wedge angle between the second blade flank surface and the second blade beveled surface or a second cutting edge cutting angle or a width of the second blade beveled surface; and
the guiding device and the first and second cutting edges are configured such that the first and second cutting edges touch each other at any time at only one intersection point.