Patent ID: 7421751

Claim:
A knife comprising: a handle portion; a blade portion movably attached to said handle portion and having a sharp portion and an unsharpened protrusion; and a locking portion having a first end and a second end, said first end having a first lip and being rotatably attached to said handle portion, said second end having a second lip and being revolvable about said first end, wherein said blade portion is operable to move from an engaged position to a disengaged position and to move from the disengaged position to the engaged position, wherein when said blade portion is positioned in the engaged position, said sharp portion is uncovered by said handle portion and said unsharpened protrusion is covered by said handle portion, wherein when said blade portion is positioned in the disengaged position, said sharp portion is covered by said handle portion and said unsharpened protrusion is uncovered by said handle portion, wherein said blade portion is operable to move in a first direction from the engaged position to the disengaged position and to move in a second direction from the disengaged position to the engaged position, and wherein when said blade portion is positioned in the engaged position, said unsharpened protrusion is disposed between said first lip and said second lip such that said blade portion is unable to move in the second direction or the first direction.