#$%^&*AU2012227311A120130502.pdf#####TILT TOP ANVIL WITH TORSION SPRING ABSTRACT A tilt anvil assembly (30) is disclosed which includes a center rod (114), a head assembly (112), and a torsion spring (150) configured to pivot the head assembly (112) relative to the center rod (114). The head assembly (112) has a locking collar (120) defining a locked position preventing pivotal movement of the head assembly (112), and an unlocked position allowing pivotal movement of the head assembly (112). The torsion spring (150) selectively engages the locking collar (120) to maintain the locking collar (120) at either the locked or unlocked position.119
