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US 6,830,578 B2Granted
Trocar
AssigneeNeoSurg Technologies, Inc.
InventorsPeter T. O'Heeron, Patrick C. Newlin
Life of this patent
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AssigneeNeoSurg Technologies, Inc.
InventorsPeter T. O'Heeron, Patrick C. Newlin
Estimating the term…
A trocar is disclosed which includes a housing assembly and a cannula assembly attached to the housing assembly to define an axial bore therethrough. The trocar further includes an obturator assembly which slidably engages the axial bore defined by the cannula assembly. The obturator assembly includes a shaft having a piercing end for insertion into a patient and a handling end for gripping by a surgeon. Attached to the piercing end of the shaft is a piercing tip having an upper face and a lower face which taper away from the shaft to form a non-conical, blunt head. The piercing tip further includes wing elements located on opposite sides of the piercing tip between the upper face and lower face. These wing elements have a lateral edges.
A trocar, comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
Trocars; Puncturing needles: details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
Surgical cutting instruments: blunt dissectors
Details of tips: blunt
Details of tips: with wings
Term ended 6 Jun 2022 (estimated)
1. Field of the Invention
The present invention relates to surgical instruments known as trocars which are used in endoscopic surgery to pierce or puncture an anatomical cavity of a patient to provide communication with the cavity during a surgical procedure. More particularly, the present invention relates to an improved non-cutting piercing tip of an obturator assembly of a trocar.
2. Description of the Prior Art
In the accompanying drawings:
FIG. 1 is an exploded perspective view of an embodiment of a trocar in accordance with the present invention.
FIG. 2A is an enlarged perspective view of a piercing tip of an obturator in accordance with the present invention.
With reference to FIG. 1, a trocar 5 in accordance with the present invention comprises a housing assembly 10 to which is attached a cannula assembly 20. The cannula assembly 20 is a hollow tube, and when attached to the housing assembly 10, a bore is defined through the trocar 5.
Still with reference to FIG. 1, a trocar 5 in accordance with the present invention also includes an obturator assembly 30 having a shaft 31 with a handling end 32 and a piercing end 33. An arcuate-shaped cap 34 is attached to the handling end 32 of the shaft 31 to facilitate insertion and manuevering of the obturator assembly 30 by a surgeon. A removable piercing tip 35 is attached to the piercing end 33 of the shaft 31. The obturator assembly 30 slides in the bore that is defined by the combination of housing assembly 10 and cannula assembly 20.
While the shaft 31 of the obturator assembly 30 is preferably formed from a stainless steel material, those skilled in the art will appreciate that the obturator shaft may be formed from a variety of suitable materials.