US Patent 10016880 Selectively one-way wrench

A switch assembly for a selectively one-way wrench includes a disc and a pusher. The disc includes two hooks, a cutout between the hooks, and an axle extending from the disc. The axle includes first and second faces, an arched face extending between the first and second faces, and an apex formed between the first and second faces. The pusher extends around the axle and includes two arched portions, two flat portions formed between the arched portions, a middle portion formed between the flat portions, and a gap between free ends of the arched portions. The arched portions extend around the arched face.