Patent ID: 8042433

Claim:
A ratchet wrench, comprising: a handle having at least one end forming a head portion, the head portion forming a hollow collar chamber having a bottom forming a support flange, the collar chamber having a circumferential wall forming a switching channel, the switching channel having an inner wall defining a receiving slot, the head portion having a top surface to which a lid plate is fixed, the lid plate having an edge forming a one-side open operation cutoff, the cutoff having an opposite wall forming a release notch; a driving collar, which is received in the collar chamber and positioned on the support flange, the driving collar having an outer circumferential surface forming a plurality of ratcheting teeth, the driving collar forming a circumferential positioning groove in the outer circumferential surface at a location close to a top thereof; and a pawl member, which is received in the switching channel and forms a plurality of ratcheting teeth engageable with the driving collar, the pawl member forming a positioning peg corresponding to the circumferential positioning groove in a middle portion close to a top thereof, the top of the pawl member being coupled through a linking bar to a pusher pad that is positioned on and movable along a top surface of the lid plate, a retention block being received in the receiving slot, the retention block forming a bore that comprises a rear section forming an inner shoulder, the bore movably receiving therein a push bar having a step section, a resilient biasing element being arranged between the push bar and an inside wall.