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Safety mechanism for trocar

  • US 5,114,407 A
  • Filed: 08/30/1990
  • Issued: 05/19/1992
  • Est. Priority Date: 08/30/1990
  • Status: Expired due to Term
First Claim
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1. A trocar comprising:

  • a trocar tube having a proximal end and a distal end, said tube proximal end connected to a trocar handle;

    an obturator having a perforating tip and extendable through the tube to perforate tissue at the distal end of the tube;

    a safety shield extendable to shield the tip of the obturator, said safety shield exhibiting a rounded distal end with a slot for passage of said obturator tip therethrough; and

    wherein said shield and obturator are connected to a handle having a top and a bottom, and said handle comprising;

    a first spring;

    a securement plate for maintaining said shield and said obturator in a closed position wherein said shield encloses said obturator, said securement plate movable by said first spring into an open position wherein said obturator tip may be exposed; and

    wherein said first spring comprises a retainment spring, said retainment spring pivoted about a pair of points on said handle such that when in said open position said retainment spring contacts said plate, and in said closed position said retainment spring rotates out of the path of said plate.

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