| 摘要 |
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.
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