Patent ID: 8701528

Claim:
A ratchet-action open-end wrench, comprising: a main body, having a handle, at least a head portion, and a fixed jaw, the head portion being connected to one end of the handle, the fixed jaw extending and protruding out from the head portion; a working portion, having at least a connection arm and a movable jaw, the connection arm abutting against the head portion, an opening being defined by the movable jaw and the fixed jaw; a slidable mechanism, comprising a sliding groove and a sliding portion, the sliding groove being formed on the head portion, the sliding portion comprising a sliding member slidably received in the sliding groove and a fixing pin penetrating through the sliding member and fixed on the connection arm, so that the working portion is able to slide along the sliding groove with respect to the main body, the working portion being slidable between a first position and a second position, a width of the opening being minified when the working portion slides toward the first position, the sliding groove being arc-shaped, an arc center of the sliding groove being located out of the head portion, the arc center and the movable jaw being located at opposite sides divided by the main body, the main body being located between the movable jaw and the arc center of the sliding groove the sliding member having an elongated non-circular cross section, so that the sliding portion is unable to rotate in the sliding groove arbitrarily; an elastic member, abutting against the main body and the working portion, so that the working portion has a tendency to slide toward the first position.