Rosenberg, Klein & Lee
Ratchet wrench having gear driven pawl
 A ratchet wrench is provided having an arcuate toothed pawl meshing with the ratchet gear of a socket driving member. A gear section engages the back side of the pawl to control the rotation direction of the socket driving member. By the ratchet gear forcing the arcuate toothed pawl against the circular recess, a great torsion force can be transferred to the socket driving member. 
B
B25B
inventional
Yu-Tang
Chen