Trocar assembly with independently acting shield means
First Claim
1. A trocar assembly, comprising:
- a trocar obturator having an outer diameter, a plurality of blades joined together and forming a piercing tip, and a plurality of longitudinal cutouts formed between said plurality of blades;
a plurality of independently acting shield means for shielding said piercing tip, mounted in said plurality of longitudinal cutouts so as to be movable between an extended position wherein said piercing tip is shielded, and a retracted position wherein said piercing tip is exposed, said plurality of shield means having a diameter substantially the same as said outer diameter of said trocar obturator; and
means for independently biasing each of said plurality of shield means toward said extended position.
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Accused Products
Abstract
A trocar assembly includes a trocar obturator having an outer diameter, a piercing tip and at least one, preferably a plurality of longitudinal cutouts; and a shield for the piercing tip, mounted in the longitudinal cutouts so as to be movable between an extended position and a retracted position, the shield being adapted to fit inside the longitudinal cutouts so as to shield the piercing tip when the shield is in the extended position, without exceeding the outer diameter of the trocar obturator. The trocar obturator may have a plurality of blades joined together to form the piercing tip, and the longitudinal cutouts may be formed between the blades. The shield preferably includes a plurality of independently acting shields mounted in the plurality of longitudinal cutouts, and further includes independent springs for independently biasing each shield of the plurality of shields toward the extended position wherein the piercing tip of the trocar obturator is shielded, and each shield being independently displaceable against the spring to a retracted position wherein the piercing tip of the trocar obturator is exposed.
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Citations
21 Claims
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1. A trocar assembly, comprising:
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a trocar obturator having an outer diameter, a plurality of blades joined together and forming a piercing tip, and a plurality of longitudinal cutouts formed between said plurality of blades; a plurality of independently acting shield means for shielding said piercing tip, mounted in said plurality of longitudinal cutouts so as to be movable between an extended position wherein said piercing tip is shielded, and a retracted position wherein said piercing tip is exposed, said plurality of shield means having a diameter substantially the same as said outer diameter of said trocar obturator; and means for independently biasing each of said plurality of shield means toward said extended position. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A trocar obturator having an outer diameter, a plurality of blades joined together and forming a piercing tip, and a plurality of longitudinal cutouts formed between said plurality of blades;
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a plurality of independently acting shield means for shielding said piercing tip, mounted in said plurality of longitudinal cutouts so as to be movable between an extended position wherein said piercing tip is shielded, and a retracted position wherein said piercing tip is exposed, said plurality of shield means having a diameter substantially the same as said outer diameter of said trocar obturator; and means for independently locking each of said plurality of shield means in said extended position. - View Dependent Claims (8, 9, 10, 11)
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12. A trocar assembly, comprising:
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a trocar obturator having a piercing tip and a plurality of longitudinal cutouts; a trocar tube in which said trocar obturator is housed; a plurality of means for shielding said piercing tip mounted in said longitudinal cutouts so as to be movable between an extended position and a retracted position; and means for independently biasing each of said plurality of shield means toward said extended position wherein said piercing tip of said trocar obturator is shielded, each of said plurality of shield means being independently displaceable against said biasing means to said retracted position wherein said piercing tip of said trocar obturator is exposed. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A trocar assembly, comprising:
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a trocar obturator having an outer diameter, a piercing tip and at least one longitudinal cutout; a trocar tube in which said trocar obturator is housed; means for shielding said piercing tip, mounted in said at least one longitudinal cutout so as to be movable between an extended position and a retracted position, said shield means being adapted to fit inside said at least one longitudinal cutout so as to shield said piercing tip when said shield means is in said extended position without exceeding said outer diameter of said trocar obturator; and means for clipping said trocar tube in place in a wall of a body cavity when said trocar assembly is in use, said clipping means comprising a boot, removably disposed on said trocar tube and having a plurality of clips for releasable attachment to a wall of a body cavity.
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Specification