Patent ID: 6907805

Claim:
A wrench for turning a polygonal fastener having a plurality of opposing parallel sides and where adjacent sides meet at respective corners, said wrench having: an opening with an open end; a throat closing an end of said opening opposite said open end; and a plurality of jaws with fastener-engaging surfaces that extend from said throat toward said open end, defining sides of said opening and adapted to grip opposing parallel sides of the fastener within said opening, the gripped sides of the fastener having rear portions proximal said throat and front side corners proximal said opening and proximal the respective jaws, said fastener-engaging surfaces comprising: first planar sections positioned to extend past the front side corners of the polygonal fastener fully seated within said opening, opposite pairs of said first planar sections being substantially parallel to each other; and diverging sections extending outwardly from said planar sections, extending from a rear end of said first planar sections toward said throat, and adapted to contact rear portions of the gripped sides of the polygonal fastener when said wrench turns about an axis of said fastener, said diverging sections each comprise second planar sections that form obtuse angles with said first planar sections measured into the respective jaws of said wrench, said obtuse angles being between about 177° and about 168°.