Ratchet extraction wrench for removing fasteners that have damaged heads

摘要

A combination ratchet wrench (2) having a standard open-type or box-type wrench (8) at one end thereof and a ratcheting extraction box (16) at the other end thereof. The ratchet extraction wrench box (16) is connected by a ratcheting mechanism to the wrench (2) that allows rotation of the ratchet extraction wrench box (16) relative to the wrench (2) only in one direction. The ratchet extraction wrench box (16) is provided with a fastener extraction head (40) that has an interior bore (58) extending inwardly from a receiving end (56). The bore (58) has a plurality of helically-shaped grooves (60), each extending from the receiving end (56) and curve radially and inwardly towards the central axis of the bore (58) to form sharp ridges (62) that extend in a helical fashion inside the bore (58). When the fastener extraction (2) is placed over a fastener head, the ridges (62) "bite" into the material of the fastener. Because the extraction head (40) is formed as an integral part of the wrench (2) there is no need to have a separate turning tool. Because a separate torque producing tool is not required and the wrench (2) has a narrow profile, the extraction wrench (2) can be used in tight spaces.