Elongated-member-driving apparatus – Surgical stapler
Reexamination Certificate
2009-10-16
2011-11-22
Smith, Scott A. (Department: 3721)
Elongated-member-driving apparatus
Surgical stapler
C227S019000, C227S176100
Reexamination Certificate
active
08061576
ABSTRACT:
A surgical instrument comprising a handle assembly, a body, a tool assembly and an articulation assembly is disclosed. The articulation mechanism includes a receptacle, and a main shaft. A lower clutch is fixedly positioned within the receptacle and has a serrated portion including a plurality of serrations. An upper clutch includes at least one projection positioned to engage the serrations of the lower clutch to releasably retain the main shaft at a rotatably fixed position. An angle between a first pair of adjacent serrations is defined as a first angle, an angle between a second pair of adjacent serrations is defined as a second angle, and an angle between a third pair of adjacent serrations is defined as a third angle. The first angle, the second angle, and the third angle are each different from one another.
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Smith Scott A.
Tyco Healthcare Group LP
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