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Laser welding of disc to close needle end

  • US 9,211,608 B2
  • Filed: 03/14/2012
  • Issued: 12/15/2015
  • Est. Priority Date: 03/15/2011
  • Status: Active Grant
First Claim
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1. An ophthalmic surgical cutting apparatus, the apparatus comprising:

  • a hollow needle, the needle havingan inner surface defining an inner diameter,an outer surface defining an outer diameter,a wall defined between the inner surface and the outer surface and having a wall thickness,a first end configured to be connected to a handle,a second end opposite the first end,an end cap welded to the second end by a weld, the end cap having a substantially flat inner surface, a substantially flat outer surface, and an end cap diameter that is smaller than the outer diameter of the outer surface of the needle, the weld having an inner portion that is positioned within the needle, an outer portion of the weld that is not within the needle, and defining a weld thickness that is greater than the wall thickness, anda port positioned a tip distance from the outer surface of the end cap; and

    wherein the hollow needle is configured to receive a hollow cutter having a cutting edge disposed on a distal end and an outer cutter surface defining an outer cutter diameter, the outer cutter diameter of the cutter being less than the inner diameter of the needle, the distal end being movable past the port by an overtravel distance.

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