×

METHOD TO FABRICATE A NEEDLE HAVING A TAPERED PORTION BETWEEN A DISTAL TIP AND A LONGITUDINAL CHANNEL

  • US 20120116322A1
  • Filed: 11/06/2010
  • Published: 05/10/2012
  • Est. Priority Date: 11/06/2010
  • Status: Abandoned Application
First Claim
Patent Images

1. A method to fabricate a needle, comprising:

  • stamping an elongated shape in a flat metal sheet, the elongated shape having a body portion and a distal portion, the elongated shape defining a longitudinal axis and two edges that are substantially parallel to the longitudinal axis in the body portion, each of the two edges including an inward curve in the distal portion, each inward curve being aligned relative to the other so as to create a neck in the distal portion, the neck being narrower than a width between the two edges in the body portion;

    forming a longitudinal channel in the elongated shape, the longitudinal channel being aligned with the longitudinal axis, the longitudinal channel giving the elongated shape a U-shaped cross-section in a plane normal to the longitudinal axis at the body portion;

    punching through the neck with a punch that slides along a punching axis that intersects the longitudinal axis with an angle in the range 15°

    to 50°

    .

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×