Patent EP0604197A2 successfully refreshed from Google Patents.
EP0604197A2
Expired / Lapsed
EP
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Safety trocar
Assignee: Ethicon Inc
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Filing: 1993-12-21
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Granted: —
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Expires: 2013-12-21
Abstract
Abstract A safety trocar is provided which includes a spring-loaded shield (34) that shields the cutting tip (30) of the obturator after the obturator penetrates tissue. The distal end of the shield is conical in profile and contains a slot which conforms to the geometry of the cutting tip. The obturator tip contains a knife edge blade (32) which extends the length of the inner diameter of the cannula (12). Ideally, the knife is made of an amorphous metal, and may be serrated at its edge.
Inventors
- 👤 Randy R. Stephens
- 👤 James Voegele
- 👤 Gregory D. Bishop
- 👤 Diane Welling
- 👤 Richard Smith
- 👤 John M. Collins
- 👤 George Selecman
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 19:48
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/34; A61B17/3494; A61B17/3496; A61B17/3417
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
84 words
A trocar comprising: an obturator connected to an obturator handle, and said obturator having a sharpened tip; a cannula connected to a cannula handle, said obturator insertable into said cannula, and said cannula having an inner diameter; a safety shield, spring loaded within said obturator handle and capable of covering said obturator tip; wherein said safety shield contains an opening through which said obturator tip may pass, and said obturator tip when extending through said opening said abuts the inner diameter of said cannula.
Claim 2
Dependent Claim
79 words
A trocar comprising: an obturator connected to an obturator handle, and said obturator having a sharpened tip; a cannula connected to a cannula handle, said obturator insertable into said cannula, and said cannula having an internal diameter; a safety shield, spring loaded within said obturator handle and capable of covering said obturator tip; wherein said safety shield contains an opening through which said obturator tip may pass, and said safety shield having a distal end with a conical shape.
Claim 3
Dependent Claim
23 words
The trocar of claim 2 wherein said opening comprises a slit and said slit has a width extending across said cannula inner diameter.
Claim 4
Dependent Claim
53 words
A trocar comprising: an obturator connected to an obturator handle, and said obturator having a sharpened tip; a cannula connected to a cannula handle, said obturator insertable into said cannula, and said cannula having a inner diameter; wherein said obturator tip when extending through said opening abuts the inner diameter of said cannula.
Claim 5
Dependent Claim
37 words
The trocar of claim 4, further comprising: a safety shield, spring loaded within said obturator handle and capable of covering said obturator tip, wherein said safety shield contains an opening through which said obturator tip may pass.
Claim 6
Dependent Claim
35 words
The trocar of claim 1 or claim 5 wherein said safety shield has distal end with a conical shape, said opening comprises a slit and said slit has a width extending across said inner diameter.
Claim 7
Dependent Claim
19 words
The trocar of any one of claims 1 to 6 wherein said tip is formed from an amorphous metal.
Claim 8
Dependent Claim
37 words
The trocar of any one of claims 1 to 7 wherein said obturator tip has a pair of planar surfaces forming a knife edge, and said knife edge extends across the length of said cannula internal diameter.
Claim 9
Dependent Claim
13 words
The trocar of claim 8 wherein said knife edge has a curved profile.
Claim 10
Dependent Claim
12 words
The trocar of claim 8 wherein said knife edge has serrated edges.
Claim 11
Dependent Claim
12 words
A trocar obturator tip, said obturator tip formed from an amorphous metal.
Claim 12
Dependent Claim
29 words
The tip of claim 11 having a pair of planar surfaces forming a knife edge, said knife edge adapted to extend across the length of a cannula inner diameter.
Claim 13
Dependent Claim
13 words
The tip of claim 12 where said knife edge has a curved profile.
Claim 14
Dependent Claim
13 words
The trocar tip of claim 12 wherein said knife edge has serrated edges.
References Cited (Backward Citations)
No citation records indexed.
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