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A trigger sprayer for generating a spray of liquid from a container comprising five parts including a housing having a tubular piston with an open ended liquid flow passageway therein; a tubular actuator member slidably received over the piston, having a trigger rigidly extending therefrom and defin

A trigger sprayer for generating a spray of liquid from a container comprising five parts including a housing having a tubular piston with an open ended liquid flow passageway therein; a tubular actuator member slidably received over the piston, having a trigger rigidly extending therefrom and defining a chamber therein with a spray orifice at one end; a rod disposed in the actuator member and including a frustoconical skirt forming a valve in the chamber across the spray orifice; an inlet valve carried by the tubular piston and including an extended valve portion slidably seated on the rod, and a biasing spring disposed between the valves. The inlet valve may include a shipping seal member formed integrally therewith and disposed on the inlet passage to seal it until the sprayer is ready for use whereupon the rod will displace or break the seal upon actuation of the sprayer.

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1. A trigger sprayer for manually dispensing fluid from a container comprising a housing and an actuator reciprocally slidable within the housing, said housing and said actuator including means for providing a pump chamber therein, inlet passageway for connecting fluid from a container to the pump c

1. A trigger sprayer for manually dispensing fluid from a container comprising a housing and an actuator reciprocally slidable within the housing, said housing and said actuator including means for providing a pump chamber therein, inlet passageway for connecting fluid from a container to the pump chamber provided in said housing, outlet passageway for allowing exit of fluid from the pump chamber, provided in said actuator, inlet valve means for controlling flow of fluid from the inlet passage to the pump chamber, outlet valve means for controlling fluid flow through said exit passage, shipping seal means for sealing said inlet passageway, and unsealing means for unsealing the shipping seal means upon reciprocation of the actuator into the housing. 2. The invention of claim 1 wherein the shipping seal means comprises a plug disposed within said inlet passageway, and said inlet passageway comprises a conduit including a bypass channel formed in a portion thereof, and said unsealing means comprises a rod disposed within the pump chamber and having a distal end aligned with said seal plug whereby upon manual sliding of the actuator into the housing of the rod will displace the seal plug from its seat to the bypass portion of the inlet passageway, allowing fluid to flow through the passageway and channel. 3. The invention of claim 2 wherein the seal plug is disposed in the inlet passageway and said rod is disposed on the actuator in axial alignment with the inlet passageway. 4. The invention of claim 3 wherein said inlet passageway comprises an open ended tubular piston disposed in said housing and said inlet valve comprises a flexible tubular member having a first portion disposed on said tubular piston and a second portion extending forward of the inlet passageway and including an annular valve portion seated in sliding relationship on the rod, and said seal plug is disposed within the tubular member by a frangible web, and is an inherent portion of the tubular member. 5. The invention of claim 4 wherein said sprayer further comprises vent channel means comprising an annular space between said tubular piston and said housing and said tubular valve member includes a vent valve portion. 6. The invention of claim 5 wherein said vent valve portion comprises a flexible conical skirt provided on the first portion of the tubular member arranged to close said annular vent passage, said skirt being sufficiently flexible to flex upon drop of pressure in a container coupled to the sprayer to allow air passage into the container. 7. The invention of claim 5 wherein said vent valve portion comprises a flexible conical skirt provided on the first portion of the tubular member arranged to close said annular vent passage, and further comprising a finger disposed on said actuator and arranged to unseat the vent valve upon sliding of the actuator into the housing. 8. The invention of claim 1 wherein the seal means comprises a thin walled seal member arranged to seal said inlet passageway, and said unsealing means comprises a sword arranged to rupture said seal member upon manual sliding of the actuator into the housing. 9. In a trigger sprayer for generating a spray of liquid from a container having a liquid therein, including: a housing having a tubular piston including means defining an inlet passageway disposed therein, means for coupling a dip tube to said housing in liquid flow communication with said inlet passageway, means on said housing for coupling a container in an air-tight manner to said housing with the dip tube extending into the container, vent means, located in said housing, for providing an air vent to the interior of the container, a tubular actuator member slidably received over said tubular piston, having an elongated trigger extending rigidly therefrom and having a closed outer end with an outlet passageway therein, said tubular actuator member with said tubular piston defining a chamber therein communicating with said first inlet and outlet passageway, inlet valve means, located against said inlet passageway member over said inlet passageway and in said chamber for preventing air and liquid from flowing into said inlet passageway from said chamber but allowing liquid to flow from said inlet passageway to said chamber, outlet valve means, coupled to said tubular actuator member in said chamber between said inlet valve means and said outlet passage, for preventing air from entering said chamber via said outlet passage when said tubular member is moved away from said housing but allowing liquid in said chamber to be expelled from said chamber via said outlet passage when said tubular actuator member is moved towards said housing, and means for biasing said tubular member away from said housing; the improvement comprising seal means for sealing said inlet passageway during shipping and storage prior to use while the tubular actuator is normally biased in an extended position with respect to the tubular piston, and unsealing means for disabling said sealing means to provide for fluid flow through the inlet passageway upon manual actuation of the sprayer to slide said tubular actuator member toward said tubular piston. 10. A trigger sprayer according to claim 9, wherein the inlet passageway includes bypass channels provided in a portion of the wall thereof, and said seal means comprises a plug disposed in the inlet passage increased by the channels, said unsealing means comprising a rod arranged to push said plug into the bypass portion of the inlet passage upon manual actuation of the sprayer, and said inboard valve means further comprises a resilient annular portion in slidable sealing engagement with the surface of said rod member. 11. A trigger sprayer according to claim 10 wherein said outlet valve means comprises, a frustoconical skirt member extending outwardly from one end of said rod member. 12. A trigger sprayer for generating a spray of liquid from a container having a liquid therein, the combination comprising: a single-piece molded plastic housing including an open ended tubular piston with an inlet passageway therein, means for coupling a dip tube to said housing in liquid flow communication with said inlet passageway, means for coupling a container in an air-tight manner to said housing with the dip tube extending into the container, and vent means for providing an air vent to the interior of the container; a single-piece molded plastic actuator member including an elongated trigger extending therefrom, a closed outer end with a spray orifice therein, and an annular wall around the orifice defining a socket, said tubular actuator member slidably received over said tubular piston, said tubular actuator member defining a pump chamber therein communicating with said inlet passage in said piston and said spray orifice in said tubular actuator member; a combined outlet valve and inlet valve seat member comprising a rod member having a first end disposed in said socket, said rod extending into the pump chamber, and having a resilient frustoconical skirt on said rod engaging said tubular actuator member, an inlet valve formed of resilient material and including an annular member having a first portion disposed on said tubular piston, and a second portion extending beyond the end of the tubular portion and terminating in a valve portion seated slidably on the rod, and spring means, engaging said housing and tubular member, for biasing said tubular member away from said housing wherein said spray orifice in said tubular member is spaced from said piston. 13. The trigger sprayer of claim 12 further comprising stop means for limiting the extent of movement of said tubular member away from said housing under the influence of said spring means, said stop means being arranged to engage the trigger to limit extension of the actuator from the housing. 14. The invention of claim 13 wherein the housing includes an open ended slot terminating at its open end in said stop means, and said trigger is disposed in said slot, said stop means including front surfaces whereby the trigger can be snapped past the stop means and into the slot upon assembly of the actuator with the housing.