Patent ID: 7444902

Claim:
An interchangeably manual or automatic ratchet wrench tool comprising: a handle including a chamber defined in the head end thereof and having an internal gear provided therearound, and including a longitudinal channel arranged therethrough and communicating with said chamber; a cartridge received in said chamber of said handle and including an actuation bar attached to the bottom thereof, and including two lateral cavities and a longitudinally large-diametered bore all fixed thereon; two pawls received in said two lateral cavities of said cartridge and biased against by springs respectively, and including a plurality of teeth affixed thereon for engagement with said internal gear of said handle, and including arcuate slots secured therein individually; a direction controlling member received in said chamber of said handle and including a rotary stem extended from the bottom thereof and fitted in said large-diametered bore, at the predetermined positions of said direction controlling member where are in response to said arcuate slots of said pawls and adjacent to said rotary stem being extendedly mounted two pins respectively, which may be inserted into said arcuate slots, besides, said direction controlling member further including a peripheral gear disposed around the bottom thereof; a stud member and a shank member both fitted through and in said longitudinal channel of said handle, a first end of said stud member having an engaging block and a second end thereof extending out of said longitudinal channel of said handle, a first end of said shank member having a pinion for engagement with said peripheral gear of said direction controlling member and a second end portion thereof engaging said engagement block of said stud member; further comprising a selector mechanism for couplingly driving said shank member by said stud member, said selector mechanism including a fitting cylinder having an arresting rim fixed on the bottom thereof for receiving a spring and said stud member within said fitting cylinder, a peripheral groove formed around said stud member, a confining peg fastened into said fitting cylinder; and a locking pillar fixed to said second end portion of said shank member; wherein said stud member is limitedly moveable outward and inward in said fitting cylinder, such that said engaging block of said stud member may clutch with said locking pillar of said shank member.