Patent ID: 7658010

Claim:
A collapsible cutter comprising: a plurality of blades connected at radially inner ends for relative rotation about a hinge axis, between respective collapsed positions, in which the blades are generally abutting, and respective extended positions, in which radially outer ends of the blades are circumferentially spaced apart; first and second rotary members mounted for engagement with portions of the inner ends of the blades, the first and second rotary members being mounted for rotation relative to one another about the hinge axis and relative to free blades of the plurality of blades, the free blades being rotatable relative to at least one of the first and second rotary members; circumferentially spaced stop faces on the first rotary member; and circumferentially spaced abutment faces on the second rotary member, wherein, when the blades are in the respective collapsed positions and the first rotary member is rotated relative to the second rotary member, the second rotary member holds portions of each free blade, between respective stop and abutment faces of the second rotary member, and locates the free blades in the respective extended positions.