Abstract: A trigger pump dispenser comprises an outlet valve which is adapted to open an outlet port when a pump chamber decreases in volume as liquid therein is dispensed through the outlet port, and which is adapted to close when the pump chamber increases in volume. The outlet valve comprises a precompression valve operable to allow liquid through the outlet only after a predetermined elevated pressure is established in the pump chamber. The valve has a movable valve member carried on or by a spring member which biases the valve member to a closed position but flexes in response to the elevated pressure in the chamber acting on the valve member to move the valve member to an open position so that liquid can pass from the chamber and thereafter be dispensed through an outlet nozzle.

Abstract: A trigger pump dispenser has a dispensing passage, an outlet nozzle movable between an “on” position and an “off” position, and a shroud. First and second indicator tabs project from the outlet nozzle and correspond with first and second indicator windows in the shroud. When the outlet nozzle is in the “on” position, the first indicator tab resides in the first indicator window and the second indicator tab is hidden by the shroud, and when the outlet nozzle is in the “off” position, the second indicator tab resides in the second indicator window and the first indicator tab is hidden by the shroud.

Abstract: A trigger pump dispenser comprises an outlet valve which is adapted to open an outlet port when a pump chamber decreases in volume as liquid therein is dispensed through the outlet port, and which is adapted to close when the pump chamber increases in volume. The outlet valve comprises a precompression valve operable to allow liquid through the outlet only after a predetermined elevated pressure is established in the pump chamber. The valve has a movable valve member carried on or by a spring member which biases the valve member to a closed position but flexes in response to the elevated pressure in the chamber acting on the valve member to move the valve member to an open position so that liquid can pass from the chamber and thereafter be dispensed through an outlet nozzle.