초록 ▼

A manually-operated pump dispenser for dispensing liquids from a container. The dispenser includes a one-piece housing coupled to the container, a dip tube extending from the housing into the container, a one-piece pump member which is slidably supported in the housing and which has a trigger extend

A manually-operated pump dispenser for dispensing liquids from a container. The dispenser includes a one-piece housing coupled to the container, a dip tube extending from the housing into the container, a one-piece pump member which is slidably supported in the housing and which has a trigger extending therefrom and a nozzle member at the end, a pair of one-way valves supported by the housing and pump member, a one-piece, plastic tubular member which engages the housing and pump member and forms a part of at least one of the one-way valves in the dispenser, and a spring engaging a portion of the pump member and the tubular member for biasing the pump member away from the housing. In a first embodiment, the tubular member forms a part of each of the one-way valves, and in a second embodiment, it forms a part of the inboard one-way valve. In this second embodiment, the outboard valve is formed by the nozzle member and the pump member, both being formed of plastic. In another embodiment, the tubular member is eliminated, the inboard valve is formed by the housing and the pump member, and the outboard valve is formed by the pump member and the nozzle member.

대표청구항 ▼

In a pump dispenser having first means defining a fluid passageway, a dip tube extending from the fluid passageway into a container, second means for coupling the container to the first means, a vent formed in the first means and communicating with the interior of the container, an outboard one-way

In a pump dispenser having first means defining a fluid passageway, a dip tube extending from the fluid passageway into a container, second means for coupling the container to the first means, a vent formed in the first means and communicating with the interior of the container, an outboard one-way valve and an inboard one-way valve located along the fluid passageway and defining a product chamber therebetween, a finger engaging element coupled to the first means for movement from a first position to a second position to vary the volume of the product chamber, third means for biasing the finger engaging element from the second position to the first position, a nozzle member, and fourth means for coupling the nozzle member to the first means at the end of the fluid passageway, the improvement comprising: said outboard one-way valve being formed by an annular valve seat coupled to one of said nozzle member and said first means, and an annular, resilient valve member formed integrally with the other of said nozzle member and said first means and engaging said valve seat, said fourth means for coupling including means for preventing relative longitudinal movement of said nozzle member and said first means during opening and closing of the outboard one-way valve formed thereby, said fourth means for coupling including means for adjustably coupling said nozzle member and said first means, said nozzle member and said first means having cooperating means for varying the flow of fluid to be exhausted via said nozzle member upon adjusting the coupling of said nozzle member and said first means.