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Surgical stapling instruments with linear position assembly

  • US 10,190,888 B2
  • Filed: 02/25/2016
  • Issued: 01/29/2019
  • Est. Priority Date: 03/11/2015
  • Status: Active Grant
First Claim
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1. A surgical stapling instrument, comprising:

  • an elongate body having a proximal end and a distal end, the elongate body including a longitudinally translatable central shaft;

    a cartridge assembly coupled to the distal end of the elongate body and defining a longitudinal axis, the cartridge assembly including a staple cartridge;

    an anvil assembly selectively connectable to a distal end of the central shaft; and

    a linear position assembly including;

    a pair of opposing magnets mounted to the central shaft, wherein each magnet generates a magnetic field, the pair of opposing magnets each having a north pole and a south pole and being oriented such that the north poles of the pair of opposing magnets are adjacent one another or the south poles of the pair of opposing magnets are adjacent one another; and

    a plurality of sensors fixed within the cartridge assembly and configured to sense a change in the magnetic fields upon a longitudinal movement of the pair of opposing magnets in response to an actuation of the central shaft to determine a linear position of the anvil assembly along the longitudinal axis relative to the staple cartridge.

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