#$%^&*AU2017202046A120170420.pdf#####TILT TOP ANVIL WITH TORSION SPRING ABSTRACT A tilt anvil assembly is disclosed comprising a center rod (140) a head assembly (112) including a housing (118), a locking collar (120), and an anvil plate (124) having staple deforming pockets (130) and a torsion spring (150) configured to pivot the head assembly (112) relative to the center rod (140), the torsion spring (150) including a coiled structure (152) and at least one biasing member (156) extending radially outwardly from the coiled structure (152).
