Patent ID: 7322263

Claim:
A wrench capable of switching sense of rotation, comprising: a handle having a head portion with a first, a second and a third receptacles, said second receptacle being located between said first and said third receptacles, said three receptacles are interconnected; a ratchet wheel having an encircled teethed circumference, said ratchet wheel being housed in said first receptacle and capable of being rotated freely; a claw piece housed in said second receptacle, said claw piece having a teeth part at one end thereof capable of engaging and leaving said teethed circumference, said claw piece being capable of being shifted around to attach to either of two lateral sides of said second receptacle; an inverting piece housed in said third receptacle and tilted a against said claw piece, whereby by said inverting piece can be rotated between a first and a second angular positions, said claw piece will shift to a right lateral side in the second receptacle as said inverting piece in said first angular position, said claw piece will shift to a left lateral side in the second receptacle as said inverting piece in said second angular position; and a switch installed said the head portion of said handle having two ends that can be pressed down and a pair of bottom driving pieces, each of said driving pieces having a tilted wall for pushing against one side of said inverting piece when one of said two ends of said switch is pressed, whereby said inverting piece can be driven by said driving pieces to attain either of said first and said second angular positions; and wherein said inverting piece has a pivotal column, a support piece and a spring; said pivotal column having a slot for retaining said support piece; one end of said spring supporting against a lateral wall of said third receptacle; another end of said spring supporting against said support piece, whereby an outer end of said support piece pushing against said claw piece.