Fluid dispensing and mixing device
First Claim
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1. A device for dispensing a predetermined quantity of a selected additive in liquid form and mixing it with a selected diluting liquid comprising:
- a container for holding a supply of said selected additive;
a positive displacement pump comprising a vessel, displacement means within said vessel subdividing the interior of said vessel into a first variable volume additive-containing compartment and a second variable volume diluting liquid-containing compartment, a first port for admitting said additive to said first compartment, a second part for admitting said diluting liquid to said second compartment, first means including an inlet passageway communicating with the interior of said container and a first check valve for conveying additive from said container into said first compartment via said first port, second means including a discharge passageway and a second check valve for conveying additive out of said first compartment via said first port;
means for conveying said diluting liquid from a supply line into said second compartment via said second port; and
means for admixing said diluting liquid with said additive as said additive is discharged from said first compartment via said first port, said second check valve, and said discharge passageway.
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Abstract
A device intended primarily for use in a shower stall that is adapted to dispense a predetermined total amount of a selected additive into a water stream, with the rate of mixing of the additive and water being controlled as a function of the water pressure. A positive displacement pump is used to dispense the additive from a storage chamber, and the additive is dispensed via a controllable applicator device.
143 Citations
26 Claims
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1. A device for dispensing a predetermined quantity of a selected additive in liquid form and mixing it with a selected diluting liquid comprising:
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a container for holding a supply of said selected additive; a positive displacement pump comprising a vessel, displacement means within said vessel subdividing the interior of said vessel into a first variable volume additive-containing compartment and a second variable volume diluting liquid-containing compartment, a first port for admitting said additive to said first compartment, a second part for admitting said diluting liquid to said second compartment, first means including an inlet passageway communicating with the interior of said container and a first check valve for conveying additive from said container into said first compartment via said first port, second means including a discharge passageway and a second check valve for conveying additive out of said first compartment via said first port; means for conveying said diluting liquid from a supply line into said second compartment via said second port; and means for admixing said diluting liquid with said additive as said additive is discharged from said first compartment via said first port, said second check valve, and said discharge passageway. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A device for dispensing a predetermined quantity of a selected additive in liquid form and mixing it with a selected diluting liquid comprising:
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a container for holding a supply of said selected additive; a positive displacement pump comprising a vessel, a resilient hollow bulb within said vessel subdividing the interior of said vessel into a first variable volume additive-containing compartment and a second variable volume diluting liquid-containing compartment, the interior of said hollow bulb constituting said first compartment and the interior space of said vessel surrounding said bulb constituting said second compartment, said bulb also having a tubular extension communicating with its interior space, said vessel having a first port connected to said tubular extension for admitting said additive to said first compartment, a second port for admitting said diluting liquid to said second compartment, first means including an inlet passageway and a first check valve for conveying additive from said container into said first compartment via said first port, second means including a discharge passageway and a second check valve for conveying additive out of said first compartment via said first port; means for conveying said diluting liquid from a supply line into said second compartment via said second port; and means for admixing said diluting liquid with said additive as said additive is discharged from said first compartment via said first port, said second check valve, and said discharge passageway. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. In combination with a shower bath system comprising a water supply pipe and a shower head connected to one end of said water supply pipe, a device for dispensing a predetermined quantity of a selected additive in liquid form and mixing it with water delivered by said supply pipe, said device comprising:
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a container for holding a supply of said selected additive; a positive displacement pump comprising a vessel, displacement means within said vessel subdividing the interior of said vessel into a first variable volume additive-containing compartment and a second variable volume-containing compartment, a first port in said vessel for admitting said additive to said first compartment, a second port in said vessel communicating with said second compartment, first means including an inlet passageway communicating with the interior of said container and a first check valve for conveying additive from said container into said first compartment via said first port, second means including a discharge passageway and a second check valve for conveying additive out of said first compartment via said first port, and third means connecting said second port to said supply pipe upstream of said shower head for delivering water to said second compartment from said supply pipe; means for admixing water supplied by said supply pipe with said additive as said additive is discharged from said first compartment via said first port, said second check valve, and said discharge passageway; a portable fluid-dispensing nozzle means having an inlet end and a discharge end, and also including a hand-operable on-off valve for controlling the flow of liquid between said inlet and discharge ends; and flexible hose means connecting said discharge passageway to the inlet end of said dispensing means; whereby when water is flowing through said supply pipe to said shower head and said on-off valve is opened, the water pressure in said second compartment will force said displacement means to reduce the size of said first compartment and thereby expel additive therefrom into said discharge passageway, and when the flow of water to said shower head is terminated, the resulting reduced pressure in said third means will permit said displacement means to increase the size of said first compartment and thereby draw additional additive into said first chamber via said inlet passageway, said first check valve and said first port. - View Dependent Claims (23, 24)
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25. A device for dispensing a predetermined quantity of a selected additive in liquid form and mixing it with a selected diluting liquid comprising:
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a container for holding a supply of said selected additive; a positive displacement pump comprising a vessel, displacement means within said vessel subdividing the interior of said vessel into a first variable volume additive-containing compartment and a second variable volume diluting liquid-containing compartment, a first port for admitting said additive to said first compartment, a second port for admitting said diluting liquid to said second compartment, first means including an inlet passageway communicating with the interior of said container and a first check valve for conveying additive from said container into said first compartment via said first port, second means including a discharge passageway and a second check valve for conveying additive out of said first compartment via said first port; means for feeding a stream of said diluting liquid from a supply line into said second compartment via said second port; and means for removing said diluting liquid from said second compartment and mixing said removed diluting liquid with said additive as said additive is discharged from said first compartment via said first port, said second check valve, and said discharge passageway. - View Dependent Claims (26)
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Specification