Patent ID: 7146884
Filing Date: 2006-12-12
Classification: B25B

Abstract:
1. An open end wrench for use with a fastener having a polygonal gripping portion, the wrench comprising: a. an elongated body having a longitudinal axis extending from a first end to a second end; b. a leading jaw extending from the body first end to a first distal end and defining c. a following jaw extending from the body first end to a second distal end and defining, wherein the leading jaw and the following jaw form between them a throat having a closed end and an open end opposite the closed end, wherein the first generally planar bite surface is disposed at a first angle with respect to the first generally planar engaging surface, the first angle extending through the leading jaw and measuring less than about 165 degrees and greater than or equal to about 90 degrees, wherein the second generally planar bite surface is disposed at a second angle with respect to the second generally planar engaging surface, the second angle extending through the following jaw and measuring less than about 165 degrees and greater than or equal to about 90 degrees, wherein a first line intersects a center of the polygonal gripping portion received between the first and second generally planar engaging surfaces and the longitudinal body axis at a point so that a third angle is defined between a portion of the body axis extending from the point toward the elongated body and a portion of the first line extending from the point away from the open end of the throat, wherein the third angle is within a range of about 30 to 70 degrees, and wherein the first angle, second angle and third angle are defined so that a second line perpendicular to the first bite surface is disposed at an angle greater than or equal to about 15 degrees and less than or equal to about 30 degrees with respect to the body axis, and a third line perpendicular to the second bite surface is disposed at an angle greater than or equal to about 15 degrees and less than or equal to about 30 degrees with respect to the body axis.