Patent ID: 7181996

Claim:
A ratchet wrench comprising: a handle including a head provided on one end, and including a chamber formed in said head, and including an internal gear provided in said head, and including a bore formed in said handle and communicating with said chamber of said head, a lower annular member and an upper annular member rotatably received in said chamber of said head, and each including a peripheral gear provided thereon, said peripheral gears of said lower and said upper annular members being faced toward each other, said lower and said upper annular members each including an internal gear provided in an inner peripheral portion thereof, a stem rotatably engaged in said bore of said handle and including a pinion provided on one end and extended into said chamber of said head for engaging with said peripheral gears of said lower and said upper annular members and for rotating said lower and said upper annular members relative to said head when said stem is rotated relative to said handle, a shank rotatably engaged in said chamber of said head, two notches oppositely formed in said shank, and two recesses oppositely formed in said shank, two first pawls received in said notches of said shank respectively and each including at least one tooth for being selectively biased to engage with said internal gear of said head and to control a driving direction of said shank by said head, two second pawls received in said recesses of said shank respectively and each including at least one tooth for being selectively biased to engage with said internal gears of said lower and said upper annular members respectively and to control a driving direction of said shank by said lower and said upper annular members and said stem, and said shank including an engaging hole formed through said shank and having two open ends and having a non-circular cross section for engaging with driven members, said two open ends of said engaging hole of said shank allowing the driven members to be engaged into said engaging hole of said shank via either of said two open ends of said shank.