Device for rasping the intramedullary canal of a bone and method for manufacturing the device
AssigneeSferic Sarl
InventorsJean-Christophe Grimard, Thierry Cousin
Life of this patent
Estimating the term…
Abstract
The present invention relates to a machining method for obtaining a teeth following a helical curve on the surface of any shape whatsoever, this method being able to be applied to the manufacture of a broach, intended to prepare the intramedullary canal of a bone. The machining method on the surface of any shape whatsoever by a tool provided with a head, following at least one geometrical curve with the shape of a helix is characterised in that it comprises the following stages: tracing the surface normal at a plurality of points taken along the helix, making the helix follow the head of the tool, by orienting the head in such a way that it follows the orientation of the defined normals.
Claims14
A machining method for obtaining cutting teeth on an external surface of a non-flat object by a tool having a head for removing material from the object and following at least one geometric curve having the form of a helix traced on the external surface of the object, comprising the steps of:
- tracing a surface normal at a plurality of points that belong to the helix along the external surface of the object;
- and
- moving the head of the tool along the helix while orienting the head to remain in the same orientation with respect to each surface normal at each said plurality of points forming a helix to machine the object and thereby form the cutting teeth.
Dependencies are inferred from the claim text.