×

Retractable needle

  • US 4,946,446 A
  • Filed: 06/14/1989
  • Issued: 08/07/1990
  • Est. Priority Date: 06/14/1989
  • Status: Expired due to Fees
First Claim
Patent Images

1. Apparatus for the safe disposal of a needle which is part of said apparatus comprising:

  • a. extended housing means having an opening at the distal end for accomodating said needle and an opening at its proximate end;

    b. plunger means mounted and being both slidable and rotatable within said housing means and extending out of the proximate end of said housing means;

    c. a passage extending through said plunger means;

    d. said needle having one end mounted within said passageway and extending out of said plunger means in the direction of the distal end of said housing means;

    e. means within said housing means for biasing said plunger means toward the proximate end of said housing means;

    f. cam and slot means on said plunger means, and cam operating means mounted on the inside of said housing means for cooperating with said cam and slot means to establish a number of discrete positions of said plunger means, including a first axial position along the length of said housing means with said needle extending out of the distal end of said housing means with said needle retracted into said housing means;

    g. said discrete positions of said plunger means including a plurality of positions as said plunger means is rotated so that said plunger means may be positioned both axially and rotationally;

    h. said passageway including means adjacent the end of said plunger means extending from the proximate end of said housing means having means for engaging a syringe; and

    i. said cam and slot means including means upon said plunger means being pushed toward the distal end of said housing means for overcoming said biasing means for rotating said plunger means into the next successive radial position and placing said plunger means into its next successive axial position along the length of said housing means, said biasing means locking said plunger means in each next successively position, so that in successive pushes of said plunger means said needle alternates between extending out from said housing means and being retracted into said housing means.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×