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US 10,098,660 B2Granted
Trocar, method for manufacturing the same, and method for continuously manufacturing the same
AssigneeKorea Institute of Machinery & Materials
InventorsJong-Kweon Park, Seung Kook Ro, Sung Cheul Lee, Byung-Sub Kim, Jaegu Kim, Kornel Ehmann, Peidong Han
Life of this patent
Estimating the term…
Abstract
According to an exemplary embodiment of the present invention, a trocar is provided. The trocar includes: a sharp end; at least three concave cutting edges extended from the sharp end; and at least three concave cutting surfaces forming the sharp end and the at least three cutting edges.
Claims8
A method for manufacturing a trocar, comprising:
- forming a concave first cutting surface by grinding a shaft extended in one direction;
- forming a concave second cutting surface by rotating the shaft by a predetermined angle with reference to an axis of the shaft and then grinding the shaft after forming the first cutting surface;
- forming a concave third cutting surface by rotating the shaft by an angle acquired by subtracting the predetermined angle from 180° with reference to the axis of the shaft and then grinding the shaft after forming the second cutting surface;
- and
- forming a concave fourth cutting surface by rotating the shaft by the predetermined angle with reference to the axis of the shaft and then grinding the shaft after forming the third cutting surface.
2 more elements
A method for continuously manufacturing a trocar, comprising:
- preparing a plurality of shafts in a direction that is perpendicular to an axis direction of each shaft;
- continuously forming a concave first cutting surface in each of the plurality of shafts by grinding the plurality of shafts using a wheel;
- continuously forming a concave second cutting surface by rotating each of the plurality of shafts by a predetermined angle with reference to an axis of each of the plurality of shafts and grinding the respective shafts using the wheel;
- continuously forming a concave third cutting surface by rotating the respective shafts by an angle acquired by subtracting the predetermined angle from 180° with reference to the axis of each shaft and grinding the respective shafts using the wheel;
- and
- continuously forming a concave fourth cutting surface by rotating the plurality of shafts by the predetermined angle with reference to the axis of each shaft and then grinding the respective shafts using the wheel.
3 more elements
Dependencies are inferred from the claim text.