#$%^&*AU2019201165A120191010.pdf#####CIRCULAR STAPLING DEVICE WITH A-FRAME SPLINES ABSTRACT A surgical stapling device (10) comprising: an approximation assembly including an anvil retainer (30)； an anvil assembly (20) including an anvil shaft (124) having at least one anvil spline (134) and an anvil head (122) having an anvil surface (122a) defining a plurality of staple deforming recesses (122b), the anvil head (122) being supported on a distal portion of the anvil shaft (124)； and a shell assembly (18) including a shell housing (126) having an inner housing portion (128) defining a bore (128a), a plurality of shell splines (134a, 134b) supported on the inner housing portion (128) within the bore (128a), each of the plurality of shell splines (134a, 134b) having spaced side walls and a pair of tapered surfaces that intersect at an apex extending distally from the spaced side walls and, each the spaced side walls of adjacent shell splines of the plurality of shell splines (134a, 134b) defining a primary channel and the spaced side walls of each of the plurality of shell splines (134a, 134b) defining a secondary channel, the secondary channel of each of the shell splines (134a, 134b) being positioned proximally of and in axial alignment with the apex of the shell spline, wherein the primary and secondary channels are dimensioned to receive one of the at least one anvil splines (134).2/11 C'4 CC) CC"4 C-,>； cc Cu / / Iv.
