Patent ID: 7228768
Filing Date: 2007-06-12
Classification: B25B

Abstract:
1. A self adjustable universal spanner with variable sizing comprising: a head portion having opposing jaws and an intermediate thumb defining an upper slide groove and a lower groove on opposite sides thereof; a ratcheting size-adjustment member reciprocal within the upper slide groove; and a jaw sizing member movable in the lower groove in a stepped manner to define a width between the ratcheting size-adjustment member and the jaw sizing member such that the spanner can fasten and unfasten various sizes of bolts, wherein the upper slide groove includes: a guide rail projecting from an upper surface of the slide groove, a sloped surface formed at a distal end of the upper surface of the slide groove, a sidewall formed at one side of the slide groove, a cylindrical groove formed at a rear part of the slide groove, teeth formed on a lower surface of the slide groove; and wherein the lower groove includes a stepped projection formed at a lower part of the head portion, semi-circular grooves formed at an upper surface of the stepped projection, and a sloped surface formed at a lowermost part of the head portion.