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Inflation/deflation syringe with threaded plunger

  • US 5,284,480 A
  • Filed: 01/22/1993
  • Issued: 02/08/1994
  • Est. Priority Date: 11/09/1990
  • Status: Expired due to Fees
First Claim
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1. A device for inflating the balloon of a balloon catheter comprising:

  • a longitudinally-extending housing defining a fluid-receiving reservoir and having a proximal and a distal end,means for connecting the housing to the catheter so that the reservoir is in fluid communication with the balloon of the catheter;

    a piston movable within the reservoir to eject fluid from the reservoir into the catheter;

    a plunger attached to the proximal end of the piston, the plunger having a threaded portion;

    threaded means for engaging the threaded portion of the plunger, said means moveable between an engaged and a disengaged position;

    an arm having a proximal and distal end and extending longitudinally with respect to the housing, said arm rotatably attached to the housing at its distal end and attached to the threaded means at the proximal end, so that movement of the proximal end of the arm moves the threaded means between an engaged and a disengaged position; and

    a biasing means for biasing the threaded means into engaged position.

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