Patent ID: 6745648
Filing Date: 2004-06-08
Classification: B25B

Abstract:
A lock-nut wrench for tightening lock nuts that secure metal conduit to a metal electrical box, in which the lock nuts have a generally annular body with a female thread that engages a male thread on the conduit and a plurality of regularly spaced, radially-directed lugs, at least some of which have a portion that engages a metal wall of the electrical box when rotated tight on the conduit; said lock-nut wrench comprising handle means for permitting the wrench to be gripped by an electrician for turning, and a head situated at one end of said handle means, said head including right and left arcuate jaws having distal ends that define an opening sufficient to pass over the associated conduit, and each said jaw having a first radially inwardly directed tooth at its distal end and a second radially inwardly directed tooth spaced proximally therefrom; said first and second teeth of each jaw defining therebetween a space to accommodate one lug of said lock nut, with the space of each jaw being diametrically opposed with the corresponding space of the other jaw; with the remainder of said jaws proximal of said second teeth being free of further teeth and defining a cylindrical surface, of at least about 90 degrees of arc, that matches the outer extent of at least one lug of said lock nut.