Patent ID: 7987746
Filing Date: 2011-08-02
Classification: B25B,B25G

Abstract:
1. A tool comprising: a shank including a first end and a second end; a driving device mounted on the first end of the shank and including a first ratcheting mechanism having a compartment and a plurality of first unsymmetrical teeth in the compartment and including a second ratcheting mechanism rotatably received in the compartment and having a plurality of second unsymmetrical teeth engaged with the plurality of first teeth, with the compartment extending in a longitudinal direction of the first ratcheting mechanism and including a first compartment and a second compartment connected to and in communication with the first compartment, with the first compartment having a larger diametrical length than that of the second compartment, with the compartment further including a first joining section interconnecting respective inner peripheries of the first and second compartments, and with the plurality of first teeth disposed on the first joining section, with the first ratcheting mechanism being rotatable relative to the second ratcheting mechanism in a single direction, with the second ratcheting mechanism including a channel extending therein, a first body section received in the second compartment, a second body section received in the first compartment and a third body section extended from the second body section and received in the first compartment, with the first body section having a first outer diametrical length, with the second body section having a second outer diametrical length greater than the first outer diametrical length, with the third body section including a third outer diametrical length less than the second outer diametrical length of the second body section, with the second ratcheting mechanism further including a second joining section interconnecting respective outer peripheries of the first and second body sections, with the plurality of second teeth disposed on the second joining section; a driving head having a shape corresponding to that of the channel and moveably received in the channel between two releasably fixed positions, with the driving head including a first lock and a second lock, with the first lock retained in a first aperture on the second ratcheting mechanism and the second lock exposed outside the second ratcheting mechanism when the driving head is at one fixed position, and with the second lock retained in a second aperture on the second ratcheting mechanism and the first lock exposed outside the second ratcheting mechanism when the driving head is at another fixed position; a channel extending in a longitudinal direction of the second ratcheting mechanism and through the first, second, and third body sections, with the first aperture extending through the first body section and in communication with the channel, and with the second aperture extending through the third body section and in communication with the channel; and an elastic member retained by an end cap and the second ratcheting mechanism for biasing the plurality of second teeth to engage with the plurality of first teeth; wherein the driving head is switchable between a first mode with the driving head adapted to turn an element in a first direction and a second mode with the tool adapted to enable the driving member to turn the element in a second direction opposite to the first direction; and wherein the driving head includes a corner interconnecting two peripheral sides thereof and a slot extending in a longitudinal direction of the corner and inset in the corner, wherein the second ratcheting mechanism includes a stopper received in an orifice which extends through the second ratcheting mechanism and is in communication with the channel, and with the stopper including a first end retained by an inner peripheral side of the bearing and a second end disposed in the channel and retained in the slot of the driving head.