Direction-Actuated Gearface Backcheck
Original Publication Date: 1987-Dec-01
Included in the Prior Art Database: 2005-Feb-02
A backcheck has a flexible actuation arm requiring a very small amount of torque when a gear rotates in a desired direction. The backcheck has a backcheck arm, which is relatively rigid, to engage a tooth of the gear to prevent rotation in the undesired direction. Because the backcheck is formed of a very soft polyurethane, it is extremely quiet. A backcheck 1, which is formed of a very soft polyurethane, rotates counterclockwise about a post 2 as a gear 3 rotates clockwise. Counterclockwise rotation of the backcheck 1 about the post 2 by the gear 3 is produced by one of teeth 4 of the gear 3 engaging an actuation arm 5 of the backcheck 1.