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Trocar system

  • US 5,290,304 A
  • Filed: 05/19/1991
  • Issued: 03/01/1994
  • Est. Priority Date: 05/14/1991
  • Status: Expired due to Fees
First Claim
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1. A trocar comprising:

  • a trocar housing, said trocar housing having a proximal end and a distal end;

    a piston slideably mounted in the housing and reciprocable therein;

    a stylet having a distal end and a sharp tip at said distal end;

    cooperating means on said piston and said stylet for restraining said stylet for limited movement with respect to said piston;

    means operatively connected to said trocar housing for biasing the piston in a direction toward the proximal end of the trocar housing;

    latching means disposed in the trocar housing for latching the piston against movement in the proximal direction; and

    de-latching means operatively connected to the piston and responsive to movement of the stylet relative to the piston to allow movement of the piston in the proximal direction.

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