×

Cannula insertion device and related methods

  • US 9,968,747 B2
  • Filed: 03/09/2015
  • Issued: 05/15/2018
  • Est. Priority Date: 10/16/2007
  • Status: Active Grant
First Claim
Patent Images

1. A cannula insertion device comprising:

  • a housing comprising a base wall;

    a cannula disposed within the housing;

    a needle attached to a needle holder, wherein the needle is configured to be disposed in the cannula;

    a compressed spring disposed between the needle holder and the base wall and coupled to and surrounding the needle when the needle is disposed in the cannula and the cannula is in a retracted position, the compressed spring having a compressed length;

    a plunger comprising a recess, wherein the plunger is adapted to advance the cannula with the needle from the retracted position to an extended position; and

    a release apparatus adapted to release the compressed spring when the plunger reaches the extended position to expand the compressed spring from the compressed length to an extended length and withdraw the needle automatically from the cannula and force the needle holder into the recess.

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