US Patent 7152271 Apparatus for adjusting a vacuum selector

A vacuum selector is provided. The vacuum selector includes a housing having first and second faces, the first face including first and second openings, the second face including a primary opening that communicates with the first and second openings along a flow path through the housing. The vacuum selector further includes a slider member movably provided in the housing and traversing the flow path, the slider member including a selector opening therethrough, the slider member being movable transversely to the flow path such that the selector opening changes the flow path to adjust flow communication between the primary opening and the first and second openings.