PAWL STRUCTURE FOR RATCHET WRENCHES AND THE WRENCHES USING THE SAME

摘要

A pawl structure of ratchet wrenches has multiple engaging teeth, a first recess and a second recess. The engaging teeth include first teeth at the mediate portion and second teeth are respectively located at two ends of the engaging teeth. The tips of the first teeth are located on a first curve which has a center and a central line extends through the center and intersects the first curve. The tips of the second teeth are located on a second curve which gradually leaves from the center of the first curve along with the second curve extending away from the central line. The first recess is located corresponding to the central line and the first teeth. The second recess is located corresponding to the second teeth.

主权项

1. A pawl structure for a ratchet wrench, comprising:
a pawl having multiple engaging teeth defined in a first side thereof and the engaging teeth comprising multiple first teeth at a mediate portion thereof, multiple second teeth located on at least one end of the engaging teeth, a ratio of number of teeth between the first teeth and the second teeth being within a range of 1.5:1 to 3.5:1, each tooth of the engaging teeth having a tip and a root, the tip being a curved face and the root being a recessed area, the tips of the first teeth located on a first curve which has a center, a central line extending through the center and intersecting the first curve, the tips of the second teeth located on a second curve, the second curve gradually leaving from the center of the first curve along with the second curve extending away from the central line, a center of the second curve located on the central line, the pawl having a first recess defined in a second side thereof and the first recess located corresponding to the central line and the first teeth, a second recess located on at least one side of the first recess and located corresponding to the second teeth.