LIQUID DISPENSER
First Claim
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1. A dispenser for dispensing preselected quantities of liquid comprising:
- a container for holding a preselected quantity of liquid to be dispensed;
a compressible liquid-retaining member spaced from the liquid in the container;
transfer means for transferring liquid from said container to said retaining member;
expressing means for selectively compressing and releasing said retaining member to express seriatim a plurality of discrete preselected portions of said preselected quantity of liquid from the container; and
conveying means for conveying said expressed discrete liquid portions from said retaining member and said container.
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Abstract
A liquid dispenser in which liquid is transferred from a container as by capillary action to a retaining member such as a spongy mass and then expressing means selectively compressing the retaining member at the desired time to force expressed liquid therefrom and conveying means such as a trough structure for conveying the expressed liquid away from the retaining member and the container.
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Citations
11 Claims
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1. A dispenser for dispensing preselected quantities of liquid comprising:
- a container for holding a preselected quantity of liquid to be dispensed;
a compressible liquid-retaining member spaced from the liquid in the container;
transfer means for transferring liquid from said container to said retaining member;
expressing means for selectively compressing and releasing said retaining member to express seriatim a plurality of discrete preselected portions of said preselected quantity of liquid from the container; and
conveying means for conveying said expressed discrete liquid portions from said retaining member and said container.
- a container for holding a preselected quantity of liquid to be dispensed;
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2. The dispenser of claim 1 wherein said retaining member comprises a sponge.
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3. The dispenser of claim 1 wherein said transfer means comprises a capillary member.
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4. The dispenser of claim 3 wherein said capillary member comprises a wick.
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5. The dispenser of claim 1 wherein said expressing means comprises a pair of relatively movable squeezing surface members between which said compressible retaining member is located and means for moving at least one of said surface members toward the other.
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6. The dispenser of claim 5 wherein said means for moving said surface members comprises a thermally activated member.
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7. The dispenser of claim 1 wherein said retaining member compRises a sponge, said transfer means comprises a wick, and said expressing means comprises a pair of relatively movable squeezing surface members between which said compressible member is located and means for moving at least one of said surface members toward the other.
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8. The dispenser of claim 1 wherein said container is provided with means forming an access opening for introducing liquid to said container and means forming an exit opening as a part of said conveying means.
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9. The dispenser of claim 8 wherein said container is provided with a shield located externally of said container and spaced from but covering said exit opening.
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10. A dispenser for dispensing preselected quantities of additive liquid, comprising:
- a container for holding a preselected quantity of liquid to be dispensed;
a compressible porous mass spaced from the liquid in the container;
transfer means for transferring liquid from said container to said porous mass;
expressing means for selectively compressing and releasing said porous mass to express seriatim a plurality of discrete portions of said preselected quantity of the liquid from the container; and
conveying means for conveying said expressed discrete liquid portions from said porous mass and said container.
- a container for holding a preselected quantity of liquid to be dispensed;
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11. The liquid dispenser of claim 10 wherein said porous mass is formed of hydrophilic synthetic plastic material.
Specification