US Patent 7841796 Paint trim tool with adjustable valve

A hand-held trim painting tool consists of a cylindrical body holding paint to be dispensed in a reservoir within the cylindrical body, a head attached to the body, a removable paint applicator attached to the head, a mechanism for loading paint into the reservoir, a valve permitting paint to be dispensed from the reservoir, an actuator incrementally opening and closing the valve, and a dispensing rate adjuster to regulate the rate at which paint is dispensed.