Patent ID: 7082860
Filing Date: 2006-08-01
Classification: B25B

Abstract:
1. A tang and ratchet wrench combination comprising: a handle including an enclosed box portion in one end having drive teeth around its interior surface; a rotatable drive mechanism provided in the box portion and including spaced first and second cavities on its top, a member between the first and the second cavities, a channel disposed between and being in communication with the first and second cavities, a spring depressible detent anchored in a central portion of a wall of the channel, first and second springs anchored at both sides of the detent, and a square drive tang extended downwardly; a rotating disc comprising a lower shaft disposed in the channel, first and second recesses formed on both sides of the shaft and first and second teeth provided on one side of the shaft between the first and the second recesses with the detent being resiliently received in the first teeth in a predetermined position; a first reversing pawl provided in the first cavity and comprising first pawl teeth, a first detent notch urged by the first spring, a first wall abutted one side of the member, and a first ridge between the first detent notch and the first wall and confined in the first recess; and a second reversing pawl provided in the second cavity and comprising second pawl teeth, a second detent notch urged by the second spring, a second wall abutted the other side of the member, and a second ridge between the second detent notch and the second wall and confined in the second recess; whereby: counterclockwise rotating the handle will urge the first ridge by the first recess, cause the first reversing pawl to compress the first spring, disengage the first pawl teeth from the drive teeth, disengage the second ridge from the second recess, expand the second spring, engage the second pawl teeth with the drive teeth, and rotate the drive mechanism counterclockwise for loosening a workpiece; immediately clockwise rotating the handle will cause the drive teeth to clockwise rotate the engaged second pawl teeth, compress the first spring, disengage the second wall from the other side of the member, and disengage the drive mechanism from the first reversing pawl for disposing the drive mechanism in a neutral position; counterclockwise rotating the rotating disc will urge the first ridge by the first recess, compress the first spring, disengage the first pawl teeth from the drive teeth, disengage the second ridge from the second recess, expand the second spring to engage the second pawl teeth with the drive teeth, and counterclockwise rotate the drive mechanism for further loosening the workpiece; and continuously clockwise rotating the rotating disc will cause the first recess to urge against the first ridge, cause the first reversing pawl to compress the first spring, disengage the second pawl teeth from the drive teeth, disengage the first reversing pawl from the first recess with the first spring being compressed, and move the detent from the first tooth to the second tooth for changing direction of drive and ratcheting.