Original Publication Date: 1980-Jul-01
Included in the Prior Art Database: 2005-Feb-13
Ratchet cam mechanisms are normally held in tight engagement with a dog actuator, frequently by a bias spring. When the actuator is moved from engagement with the cam face, the ratchet is allowed to advance one or more teeth. In moving the dog actuator, the force of the bias spring must be overcome, and the resultant sliding action creates significant wear on the dog and cam mating surfaces. This article describes a mechanism for relieving the engagement force when the actuator is to be moved.