Pin drive rotary surgical cutting tools and powered handpieces
AssigneeMedtronic PS Medical, Inc.
InventorsPaul Cihak, Zachary Heiliger
Life of this patent
Estimating the term…
Abstract
A surgical cutting tool includes an elongated shaft and a cutting head. The shaft defines a coupling portion terminating at a proximal end of the shaft, a stem portion, and a distal portion. The stem portion defines a central axis. The coupling portion optionally defines a deflection surface positioned oblique with respect to the central axis and connected with a first driven surface and a second driven surface. Upon insertion into a drive chuck, the deflection surface promotes self-alignment of the cutting tool and the drive chuck.
Claims18
A drive chuck for receiving and supporting any one of a plurality of tools, comprising:
- a hub-like body defining an interior passage configured to operably receive a tool tang;
- a guide face defining a maximum diameter of the interior passage;
- and
- first and second opposing drive pins configured to project radially inwardly from the guide face, the first opposing drive pin defining a first drive surface and a second drive surface and the second opposing drive pin defining a first drive surface and a second drive surface,
- wherein the first and second opposing drive pins are symmetrical, yet offset relative to one another, and
- wherein a major plane defined by the first drive surface of the first opposing drive pin is parallel to, but offset from, a major plane defined by the first drive surface of the second opposing drive pin relative to a rotational axis of the drive chuck.
A drive chuck for receiving and supporting any one of a plurality of tools, comprising:
- a hub-like body defining an interior passage configured to operably receive a tool tang;
- a guide face defining a maximum diameter of the interior passage;
- and
- first and second opposing drive pins configured to project radially inwardly from the guide face, the first opposing drive pin defining a first drive surface and a second drive surface and a recessed surface therebetween, and the second opposing drive pin defining a first drive surface and a second drive surface and a recessed surface therebetween,
- wherein the first and second opposing drive pins are symmetrical, yet offset relative to one another wherein a major plane defined by the first drive surface of the first drive pin is parallel to, but offset from, a major plane defined by the first drive surface of the second drive pin relative to a rotational axis of the drive chuck, and
- wherein a major plane defined by the second drive surface of the first drive pin is parallel to, but offset from, a major plane defined by the second drive surface of the second drive pin relative to the rotational axis.
Dependencies are inferred from the claim text.