#$%^&*AU2018200841A120180913.pdf#####ANVIL ASSEMBLY OF CIRCULAR STAPLING DEVICE INCLUDING ALIGNMENT SPLINES ABSTRACT A tool assembly (40) includes a cartridge assembly (200), a shell (100), and an anvil assembly (300). The shell (100) houses the cartridge assembly (200) and defines a passage (110). The shell (100) includes alignment splines (120) that are disposed within the passage (110) and define channels (124) between adjacent alignment splines (120). The anvil assembly (300) includes an anvil (310) and a center rod (330) that extends from the anvil (310). The center rod (330) defines a longitudinal axis and includes a first spline (360) and second splines (370). The first spline (360) includes a first leading facet (362) that is configured to engage the alignment splines (120) to clock the anvil assembly (300) relative to the cartridge assembly (200). The second splines (370) are radially spaced apart about the longitudinal axis. Each of the second splines (370) includes a leading end (372) that defines a plane that is substantially orthogonal to the longitudinal axis. The leading end (372) is configured to crash with the alignments spines (120) when the anvil assembly (300) is misaligned with the cartridge assembly (200).1/12 C'4
