METERING DISPENSING SYSTEM WITH IMPROVED VALVING TO PREVENT ACCIDENTAL DISPENSING OF LIQUID THEREFROM
First Claim
1. A dispensing device, comprising:
- a base plate, having an upstream side and a downstream side, and defining a liquid flow aperture therethrough;
a lower member having a first extension portion and a flap of material integrally formed together;
the flap of material being removably positionable over the liquid flow aperture and in sealing engagement with the downstream side of the base plate;
an upper member having a second extension portion and a flexible pump housing integrally formed together;
the 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 first extension portion and the second extension portion being mated together and defining an exit pathway therebetween;
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 pathway 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.
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Accused Products
Abstract
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. The dome pump is integrally formed with a top portion of the exit pathway. Optionally, the base plate and bottom portion of the exit pathway are also integrally formed to facilitate manufacture and reduce costs of the pump while improving performance thereof.
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Citations
25 Claims
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1. A dispensing device, comprising:
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a base plate, having an upstream side and a downstream side, and defining a liquid flow aperture therethrough; a lower member having a first extension portion and a flap of material integrally formed together;
the flap of material being removably positionable over the liquid flow aperture and in sealing engagement with the downstream side of the base plate;an upper member having a second extension portion and a flexible pump housing integrally formed together;
the 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 first extension portion and the second extension portion being mated together and defining an exit pathway therebetween; 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 pathway 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. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A dispensing device, comprising:
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a container maintaining a material to be dispensed; a first member having a dome pump received by said container, said dome pump having an inlet in communication with an interior of said container, and a top portion of an exit pathway integrally formed therewith; a second member having a first valve interposed between said inlet and said interior of said container and a bottom portion of an exit pathway integrally formed therewith; and wherein activating forces applied concurrently to opposite sides of said dome pump activate said first valve to cause passage of material from said dome pump and through said exit pathway formed by the top portion and the bottom portion mated together, and activating forces applied to only one side of said dome pump activate said first valve to cause passage of material from said dome pump into said container through said inlet. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A dispensing device, comprising:
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a first member having an upstream side and a downstream side, and defining a liquid flow aperture therethrough and a first extension portion; a second member having a second extension portion and a flexible pump and a flap of material integrally formed together;
the flap of material being removably positionable over the liquid flow aperture and in sealing engagement with the downstream side of the first member;
the flexible pump housing having an inner cavity;
the first extension portion and the second extension portion being mated together to define an exit pathway therebetween;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 pathway when the flap is positioned over and in sealing engagement with the liquid flow aperture to prevent flow of liquid therethrough. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A dispensing device, comprising:
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a container maintaining a material to be dispensed; a first member having a dome pump received by said container, said dome pump having an inlet in communication with an interior of said container, and a top portion of an exit pathway integrally formed therewith; a second member having a base plate with a first valve interposed between said inlet and said interior of said container and a bottom portion of an exit pathway integrally formed therewith;
the top portion and the bottom portion being mated together forming an exit pathway therebetween; andwherein activating forces applied concurrently to opposite sides of said dome pump activate said first valve to cause passage of material from said dome pump and through said exit pathway, and activating forces applied to only one side of said dome pump activate said first valve to cause passage of material from said dome pump into said container through said inlet. - View Dependent Claims (24, 25)
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- 20. The dispensing device of claim 20, wherein the first valve includes an armature that is integrally connected to the first member.
Specification