Patent ID: 6443038
Filing Date: 2002-09-03
Classification: B25B

Abstract:
An open-end wrench structural arrangement for use in grasping and turning fasteners, comprising:a first jaw having a first driving surface; a second jaw having a second driving surface; a nest portion interconnecting said first driving surface and said second driving surface; a mouth area substantially defined by said first driving surface of said first jaw, said second driving surface of said second jaw, and said nest portion; said first driving surface of said first jaw having a first convex surface portion facing the mouth area; said second driving surface of said second jaw including: a first transverse tooth being located at a distal end of said second jaw and facing the mouth area, said first transverse tooth having a pointed apex; a second transverse tooth being located adjacent the said first transverse tooth and facing the mouth area, said second transverse tooth having a smoothly curved apex; and a second convex surface portion being located between the second transverse tooth and said nest portion and facing the mouth area; wherein the first transverse tooth, the second transverse tooth and the second convex surface portion are dimensionally spaced from a midpoint of the first convex surface portion in the ratio of 25:26:24 units as follows, respectively: wherein a first distance of 25 units extends from the midpoint of first convex surface portion to the apex of the first tooth; wherein a second distance of 26 units extends from the midpoint of first convex surface portion to a midpoint of the second tooth; and wherein a third distance of 24 units extends from the midpoint of first convex surface portion to a midpoint of the second convex surface portion.