Abstract: A ratchet-type one-way clutch mechanism 300, 360. The mechanism has an inner race member 302, 364 with a plurality of notches 312, 372, an outer member 304, 362 with a plurality of pockets 310, 370, a plurality of pawl members 306, 368 positioned in the pockets for engagement with the notches, and spring biasing members 308 for biasing the pawl members toward engagement. The outer member can be a stator member 362 or an outer race member 304. Retainer members 314, 366 retain the pawls axially in the pockets. Bearing surfaces 303, 305, 307, 315 on the inner race member, outer member and retainer member provide bearing support. Large radii R1 on the pawl members and pawl pockets reduce wear and minimize the cost of secondary machining operations. The lower surfaces 344 of the pawl members are curved and the curvature R2 can be larger than the curvature R3 of the inner race member.

Abstract: A ratchet-type one-way clutch mechanism. The mechanism has an inner race member with a plurality of notches, an outer stator member with a plurality of pockets, a plurality of pawl members positioned in the pockets for engagement with the notches, and spring biasing members for biasing the pawl members toward engagement. The stator member is made from a non-ferrous material, such as aluminum or a plastic material. The pawl members have pivot ridges which mate with peaks or recesses in the pockets in the outer member to precisely position the pawls in the pockets. The centers of mass of the pawl members are selectively positioned such that the pawl members will have a tendency to become engaged or disengaged with the notches in the inner member. The spring biasing members can be Z-shaped springs, garter springs, or the like.