Patent ID: 9707668
Date: 2017-07-18
CPC Classifications: B25B

Claim:
1. A multi-mode one-way wrench including: a head made with a chamber and cutouts in communication with the chamber, wherein each of the cutouts comprises a sub-cutout made in a wall thereof; a toothed wheel rotationally placed in the chamber and formed with teeth; pawls for alternate engagement with the toothed wheel and each comprising an axle pivotally placed in the sub-cutout of a corresponding one of the cutouts, wherein the pawls include a leading pawl and at least one following pawl formed with a stem; and a switch placed on the head and made with at least one arched groove for receiving and guiding the stem to move the following pawl between a first mode for engagement with the toothed wheel and a second mode kept from the toothed wheel, wherein the cutouts are biased from one another by an angle of 360°×(M+I/L)−^N, wherein L is an integer for representing the number of the cutouts, M is any proper integer, and N is an integer for representing the number of the teeth.