Patent ID: 7704027

Claim:
An anchor bolt having a first and a second end and extending from the first end to the second end comprising: a fixing shaft portion protrudingly installed outside a concrete frame and extending from the first end of the anchor bolt, the first end being located outside of the concrete frame; an embedded portion embeddedly installed in the concrete frame, the embedded portion being substantially straight and extending from the second end of the anchor bolt, the second end being embedded in the concrete frame; a bent portion between the fixing shaft portion and the embedded portion, wherein said fixing shaft portion and said embedded portion are in a bent shape relative to each other to form the bent portion, thereby causing an axis of said fixing shaft portion and an axis of said embedded portion to be deflected from each other while being set in parallel to each other, wherein the bent portion is embeddedly installed in the concrete frame; and a reinforcing piece attached to the bent portion, wherein the reinforcing piece includes a groove for receiving the bent portion and has a triangular shape.