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Plunger systems

  • US 5,873,861 A
  • Filed: 11/12/1996
  • Issued: 02/23/1999
  • Est. Priority Date: 11/12/1996
  • Status: Expired due to Term
First Claim
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1. A plunger for use in a syringe, the plunger comprising:

  • a releasable connection mechanism adapted to make a releasable connection with an injector drive member comprising a piston, the piston being movable through an injector housing to control the movement of the plunger, the connection mechanism including at least two relatively flexible capture members projecting rearwardly from a rear surface of the plunger, the capture members adapted to flex radially outwardly when contacted by the piston to form a releasable engagement with the piston when the piston and the capture members are in an engagement position relative to each other, the capture members further being adapted to release the piston upon relative rotation of the capture members to a disengagement position relative to the piston.

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