Patent ID: 6923096

Claim:
An adjustable wrench structure for engaging and rotationally driving conventional hex fasteners including hex-head bolts and hex nuts of any size within in a predetermined size range, comprising: a main body configured with at least one socket cavity having a special modified hex cross-sectional shape characterized by a group of three adjacent standard-sized facets and a group of three non-standard-sized facets consisting of an undersized facet and two equally oversized facets flanking the undersized facet, the main body being configured with a threaded radial bore traversing a wall thereof diametrically opposite the undersized facet: a clamping screw, threadedly engaged in the radial bore of the main body, made and arranged to engage a hex fastener, inserted into the socket cavity, for purposes of rotationally driving the hex fastener, by applying a clamping force, generated by rotationally tightening the clamping screw, to a facet of the hex fastener and thus forcing at least one other facet of the hex fastener against a corresponding main body constraint pattern formed by at least one of the non-standard-sized facets of the socket cavity: and driving means for receiving rotational driving torque from a driving tool to be transmitted via said main body to a driven hex fastener located in the socket cavity.