초록 ▼

A liquid dispensing device includes a storage container and dome pump mechanism attached thereto for metered dispensing. A one-way valve is employed to pull liquid from the storage container into the dome for metering. An exit passageway serves as an output valve. Each time the dome pump housing is

A liquid dispensing device includes a storage container and dome pump mechanism attached thereto for metered dispensing. A one-way valve is employed to pull liquid from the storage container into the dome for metering. An exit passageway serves as an output valve. Each time the dome pump housing is depressed, a substantially equal volume of fluid is dispensed from the container. To prevent accidental dispensing, the one-way valve in the dome pump remains normally open and unsealed to allow backflow of liquid back into the storage container pouch when pressure is placed on the dome. The user squeezes the dome and base plate together to seal the one-way valve to urge liquid out through the exit port for actual dispensing. Also, interior pouch force creates backflow through the exit port back into the containment chamber to further prevent leakage.

대표청구항 ▼

What is claimed is: 1. A dispensing device, comprising:a base plate, having an upstream side and a downstream side, and defining a liquid flow aperture therethrough;a flap of material removably positionable over the liquid flow aperture and in sealing engagement with the downstream side of the base

What is claimed is: 1. A dispensing device, comprising:a base plate, having an upstream side and a downstream side, and defining a liquid flow aperture therethrough;a flap of material removably positionable over the liquid flow aperture and in sealing engagement with the downstream side of the base plate;a flexible pump housing, having an inner cavity and a flap contact surface on an inner wall, sealed to the downstream side of the base plate and positioned about the flap of material; the flexible pump housing and base plate further defining an exit port;the flexible pump housing being configured to draw liquid from the upstream side of the base plate, through the liquid flow aperture and into the inner flow cavity;the flexible pump housing being further configured to urge liquid through the exit port when the flap contact surface of the flexible pump housing has pressed the flap of material against the downstream side of the base plate to seal the liquid flow aperture to prevent flow of liquid therethrough.