Endoscopic surgical instrument with rotatable inner shaft
AssigneeAmerican Cyanamid Company
InventorStanley M. Hurd
Life of this patent
Estimating the term…
Abstract
A reusable endoscopic surgical instrument includes a handle assembly attached to a slender shaft assembly. The shaft assembly includes inner and outer shafts, with the inner shaft being rotatable by operation of the handle assembly to rotate a surgical tool operably connected to the distal end of a pushrod disposed within the inner shaft. The handle assembly includes first actuating mechanism for actuating the pushrod to operate the surgical tool and a second actuating mechanism for rotating the inner shaft. The outer shaft is axially slidable with respect to the inner shaft to cover a flush port system in the handle assembly for cleaning and improved sterilizability of the instrument.
Claims30
An endoscopic surgical instrument, comprising:
- an elongated shaft assembly having an outer shaft and an inner shaft disposed within said outer shaft;
- a handle assembly connected to a proximal end of said shaft assembly;
- first actuation means, connected to said handle assembly, for actuating a surgical tool operably connected to a distal end of said inner shaft;
- and
- second actuation means for rotating said inner shaft within said outer shaft to orient the surgical tool with respect to an axial direction of said shaft assembly, said second actuation means connected to said handle assembly, wherein
- said second actuation means includes a barrel cam connected to said inner shaft and having a helical groove, and a control mechanism with a cam driver engaging the helical groove, and wherein said control mechanism is mounted for linear movement with said handle assembly thereby to convert such linear movement into rotary motion of said inner shaft by interaction of the helical groove and said cam driver.
An endoscopic surgical instrument, comprising:
- an elongated shaft assembly including an outer shaft, an inner shaft disposed within said outer shaft, and a pushrod disposed within said inner shaft;
- a handle assembly connected to a proximal end of said elongated shaft, said handle assembly including an actuating mechanism for actuating said pushrod in the axial direction;
- and
- means for imparting rotational movement to said inner shaft, wherein
- said rotational movement imparting means includes a barrel cam having a helical groove and connected to a proximal end of said inner shaft, and further includes linear moving means, engagable with said barrel cam, for converting linear movement into rotational movement of said inner shaft.
An endoscopic surgical instrument, comprising:
- an elongated shaft assembly including an outer shaft, an inner shaft disposed within said outer shaft and a pushrod mounted within said inner shaft for movement in an axial direction;
- and
- a handle assembly connected to a proximal end of said shaft assembly, said handle assembly including a pivoting leg operably connected to said pushrod, a hollow barrel cam connected to said inner shaft and having a helical groove, and a sliding control mechanism operably connected to said barrel cam and mounted on said handle assembly for linear movement, wherein linear movement of said control mechanism imparts rotational movement to said barrel cam and said inner shaft.
Dependencies are inferred from the claim text.