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, and a resilient, annular biasing member which engages the housing and pump member, has a stretchable portion providing a restoring force to the pump member and forms a part of at least one of the one-way valves in the dispenser. In a first embodiment, the biasing 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.

대표청구항 ▼

In a manually-operated pump dispenser including a housing adapted to be coupled to a liquid-containing bottle and having a fluid passageway, a dip tube extending from the passageway into the bottle and a vent for venting the bottle to the atmosphere; a pump member having a fluid passageway with an e

In a manually-operated pump dispenser including a housing adapted to be coupled to a liquid-containing bottle and having a fluid passageway, a dip tube extending from the passageway into the bottle and a vent for venting the bottle to the atmosphere; a pump member having a fluid passageway with an exit orifice, and a finger engaging element, the pump member being slidably engaged with the housing; and a pair of one-way valves located along the pump member and the housing fluid passageways, the improvement comprising: a one-piece, annular resilient member for biasing the pump member away from the housing, said resilient member including a first portion engaging the housing, a second portion engaging the pump member, and a stretchable portion located between said first and second portions which is longitudinally stretched upon movement of the pump member towards the housing.