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Surgical instrument

  • US 8,413,868 B2
  • Filed: 07/06/2012
  • Issued: 04/09/2013
  • Est. Priority Date: 08/31/2007
  • Status: Active Grant
First Claim
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1. An articulation mechanism for a surgical instrument having a tool assembly pivotable between a non-articulated position to an articulated position, comprising:

  • an articulation mechanism including an upper portion and a lower portion, the lower portion including a plurality of serrations and being positioned in juxtaposed relation with the upper portion, the upper portion including at least one projection positioned to engage the serrations of the lower portion, the lower portion being fixedly positioned, and the upper portion being slidable and rotatable with respect to the lower portion,a first angle being defined between a first pair of adjacent serrations, and a second angle being defined between a different pair of adjacent serrations, the first angle and the second angle are different in value from one another.

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