Abstract: A can opener with top and circumferential support members attached to each other. A cutting blade is mounted to the circumferential support member and has a blade edge configured for cutting at least a portion of a circumferential can wall of a can. The top and circumferential support members are configured for guiding and the cutting blade along the circumferential can wall and for positioning at least a portion of the blade edge at an angle sufficiently small against the can wall for cutting at least a portion of the wall, while reducing or eliminating binding or tearing of said portion of the wall upon rotation of the can opener against the can by a user.

Abstract: A can opener that has a circumferential support member that is manipulable by a user for axial rotation about a can. The circumferential support member has generally curved inner surface generally corresponding to the shape of the can. A cutting blade is mounted to the circumferential support member and includes a shearing portion configured for shearing at least a shearable portion of a can wall of the can against an opposing portion of the can that faces substantially axially, upon the axial rotation of the circumferential support member about the can.