System and method for the manufacture of surgical blades

Details System and method for the manufacture of surgical blades System and method for the manufacture of surgical blades

B - Operations, Transporting

21

K

B21K 11/00 (2006.01) A61B 17/32 (2006.01) B28D 5/02 (2006.01)

Patent

CA 2478329

A method for manufacturing surgical blades (2402) from either a crystalline or poly-crystalline material, preferably in the form of a wafer (202), is disclosed. The method includes preparing the crystalline or poly-crystalline wafers by mounting them and machining trenches into the wafers. The methods for machining the trenches, which form the bevel blade surfaces, include a diamond blade saw (502, 504, 506, 508), laser system (900), ultrasonic machine (100), and a hot forge press (1052, 1054). The wafers are placed in an etchant solution (1402) which isotropically etches the wafers in a uniform manner, such that layers of crystalline or poly-crystalline material are removed uniformly, producing single or double bevel blades (20A-G). Nearly any angle can be machined into the wafer which remains after etching. The resulting radii of the blade edges is 5-500 nm, this is equivalent to a diamond edged blade manufactured at a fraction of the cost.

L'invention concerne un procédé de fabrication de lames chirurgicales (2402) à partir d'un matériau cristallin ou polycristallin, de préférence sous forme de plaquette (202). Ledit procédé consiste à préparer les plaquettes cristallines ou polycristallines par montage de celles-ci et usinage de tranchées dans les plaquettes. Les procédés d'usinage des tranchées, permettant de former les surfaces des lames en biseau, comprennent l'utilisation d'une scie (502, 504, 506, 508) à lame diamantée, un système laser (900), une machine (100) à ultrasons, et une presse (1052, 1054) de forgeage à chaud. Les plaquettes sont placées dans une solution (1402) d'attaque chimique qui grave isotropiquement les plaquettes de manière uniforme, de manière à éliminer uniformément les couches de matériau cristallin ou polycristallin, afin d'obtenir des lames en biseau simples ou doubles (20A-G). Presque tous les angles peuvent être usinés dans la plaquette restante après la gravure. Les rayons des bords des lames obtenus varient de 5 à 500 nm, c'est-à-dire l'équivalent à une lame aux bords diamantés fabriquée à une fraction du coût.

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