US Patent 7325312 Folding knife with pivoting blade and guard

A folding knife having a handle, a pivoting blade guard, and a pivoting blade. Both the guard and the blade pivot on a common pivot pin that is secured to or within the handle. Both the handle and the guard feature at least one arcuate slot that extends in an arc around the pivot pin. A tang pin located in the tang of the blade rides in the arcuate slots and serves as a stop for both the handle and the guard, limiting the range of their rotation on the pivot pin.