US Patent 7114415 Control device for ratchet tool

A ratchet tool includes a handle having a chamber formed in a head for rotatably receiving a drive member which includes a gear, a pawl is received within the handle and includes two end portions for engaging with the gear of the drive member, to control driving directions of the drive member by the head of the handle. A pawl actuating member is rotatably received in the handle and includes a channel for slidably receiving an actuator. A spring may bias either of the end portions of the pawl to selectively engage with the gear, and to control the driving directions of the drive member by the handle. The actuator includes an actuating finger for engaging with either of two protrusions extended from the pawl.