초록

A dip tube includes a main dip tube section and a plurality of input sections. Each input section in the plurality of input sections includes a reservoir region capped by a hydrophilic membrane. The plurality of input sections are joined to the main dip tube section at a junction.

대표청구항 ▼

1. A dip tube comprising: a main dip tube section;a first input section capped by a first hydrophilic membrane to prevent air from entering into the first input section during a use of the dip tube; anda second input section capped by a second hydrophilic membrane to prevent air from entering into t

1. A dip tube comprising: a main dip tube section;a first input section capped by a first hydrophilic membrane to prevent air from entering into the first input section during a use of the dip tube; anda second input section capped by a second hydrophilic membrane to prevent air from entering into the second input section during the use of the dip tube,wherein the first input section and the second input section are joined to the main dip tube section;wherein at least one of the first input section and the second input section includes a venturi region;wherein the venturi region includes a first venturi portion with a first venturi cross sectional flow area taken perpendicular to a flow direction of the venturi region, a second venturi portion with a second venturi cross sectional flow area taken perpendicular to the flow direction of the venturi region, and a third venturi portion with a third venturi cross-sectional flow area taken perpendicular to the flow direction of the venturi region, wherein the second venturi portion is positioned between the first venturi portion and the third venturi portion, the second venturi cross sectional flow area is less than the first venturi cross sectional flow area, the second venturi cross sectional flow area is less than the third venturi cross sectional flow area, the first venturi cross sectional flow area is less than the third cross sectional flow area, and the first cross sectional flow area is positioned downstream along the flow direction relative to the third cross sectional flow area. 2. The dip tube of claim 1, wherein the first input section includes a first reservoir region that is capped by the first hydrophilic membrane, and the second input section includes a second reservoir region that is capped by the second hydrophilic membrane. 3. The dip tube of claim 2, wherein a cross sectional flow area of the first reservoir region taken perpendicular to a flow direction of the first input section is greater than a cross sectional flow area of a downstream portion of the first input section taken perpendicular to a flow direction of the first input section, and a cross sectional flow area of the second reservoir region taken perpendicular to a flow direction of the second input section is greater than a cross sectional flow area of a downstream portion of the second input section taken perpendicular to a flow direction of the second input section. 4. The dip tube of claim 2, wherein a cross section of the first input section where the first reservoir region is capped by the first hydrophilic membrane has approximately square corners, and a cross section of the second input section where the second reservoir region is capped by the second hydrophilic membrane has approximately square corners. 5. The dip tube of claim 2, wherein a cross section of the first input section where the first reservoir region is capped by the first hydrophilic membrane is rounded, and a cross section of the second input section where the second reservoir region is capped by the second hydrophilic membrane is rounded. 6. The dip tube of claim 1, further comprising a third input section capped by a third hydrophilic membrane to prevent air from entering into the third input section during the use of the dip tube, wherein the third input section is joined to the main dip tube section. 7. The dip tube of claim 6, further comprising a fourth input section capped by a fourth hydrophilic membrane to prevent air from entering into the fourth input section during the use of the dip tube, wherein the fourth input section is joined to the main dip tube section. 8. The dip tube of claim 1, wherein a cross sectional flow area of a downstream portion of the first input section taken perpendicular to a flow direction of the first input section is less than the third cross sectional flow area of the third venturi portion. 9. A dip tube comprising: a main dip tube section;a first input section joined to the main dip tube section, the first input section including a first reservoir region that is capped by a first hydrophilic membrane to prevent air from entering into the first input section during a use of the dip tube, wherein a cross sectional flow area of the first reservoir region taken perpendicular to a flow direction of the first input section is greater than a cross sectional flow area of a downstream portion of the first input section taken perpendicular to a flow direction of the first input section; anda second input section joined to the main dip tube section, the second input section including a second reservoir region that is capped by a second hydrophilic membrane to prevent air from entering into the second input section during the use of the dip tube, wherein a cross sectional flow area of the second reservoir region taken perpendicular to a flow direction of the second input section is greater than a cross sectional flow area of a downstream portion of the second input section taken perpendicular to a flow direction of the second input section,wherein each of the first input section and the second input section includes a venturi region including a first venturi portion with a first venturi cross sectional flow area taken perpendicular to a flow direction of the venturi region, a second venturi portion with a second venturi cross sectional flow area taken perpendicular to the flow direction of the venturi region, and a third venturi portion with a third venturi cross-sectional flow area taken perpendicular to the flow direction of the venturi region, wherein the second venturi portion is positioned between the first venturi portion and the third venturi portion, the second venturi cross sectional flow area is less than the first venturi cross sectional flow area, the second venturi cross sectional flow area is less than the third venturi cross sectional flow area, the first venturi cross sectional flow area is less than the third cross sectional flow area, and the first cross sectional flow area is positioned downstream along the flow direction relative to the third cross sectional flow area. 10. The dip tube of claim 9, wherein a cross section of the first input section where the first reservoir region is capped by the first hydrophilic membrane is rounded or has approximately square corners, and a cross section of the second input section where the second reservoir region is capped by the second hydrophilic membrane is rounded or has approximately square corners. 11. The dip tube of claim 9, further comprising a third input section capped by a third hydrophilic membrane to prevent air from entering into the third input section during the use of the dip tube, wherein the third input section is joined to the main dip tube section. 12. The dip tube of claim 11, further comprising a fourth input section capped by a fourth hydrophilic membrane to prevent air from entering into the fourth input section during the use of the dip tube, wherein the fourth input section is joined to the main dip tube section. 13. The dip tube of claim 9, wherein a cross sectional flow area of a downstream portion of the first input section taken perpendicular to a flow direction of the first input section is less than the third cross sectional flow area of the third venturi portion. 14. A fluid delivery device comprising: a container defining an interior area;a pump nozzle head; anda dip tube attached to the pump nozzle head and extending within the interior area of the container, the dip tube comprising a main dip tube section, a first input section capped by a first hydrophilic membrane to prevent air from entering into the first input section during a use of the fluid delivery device, and a second input section capped by a second hydrophilic membrane to prevent air from entering into the second input section during the use of the fluid delivery device,wherein the first input section and the second input section are each joined to the main dip tube section, and the first hydrophilic membrane and the second hydrophilic membrane are each positioned within an end portion of the interior area of the container;wherein at least one of the input sections includes a venturi region;wherein the venturi region includes a first venturi portion with a first venturi cross sectional flow area taken perpendicular to a flow direction of the venturi region, a second venturi portion with a second venturi cross sectional flow area taken perpendicular to the flow direction of the venturi region, and a third venturi portion with a third venturi cross-sectional flow area taken perpendicular to the flow direction of the venturi region, wherein the second venturi portion is positioned between the first venturi portion and the third venturi portion, the second venturi cross sectional flow area is less than the first venturi cross sectional flow area, the second venturi cross sectional flow area is less than the third venturi cross sectional flow area, the first venturi cross sectional flow area is less than the third cross sectional flow area, and the first cross sectional flow area is positioned downstream along the flow direction relative to the third cross sectional flow area. 15. The fluid delivery device of claim 14, wherein the first input section includes a first reservoir region that is capped by the first hydrophilic membrane, and the second input section includes a second reservoir region that is capped by the second hydrophilic membrane. 16. The fluid delivery device of claim 15, wherein a cross sectional flow area of the first reservoir region taken perpendicular to a flow direction of the first input section is greater than a cross sectional flow area of a downstream portion of the first input section taken perpendicular to a flow direction of the first input section, and cross sectional flow area of the second reservoir region taken perpendicular to a flow direction of the second input section is greater than a cross sectional flow area of a downstream portion of the second input section taken perpendicular to a flow direction of the second input section. 17. The fluid delivery device of claim 14, further comprising a third input section capped by a third hydrophilic membrane to prevent air from entering into the third input section during the use of the dip tube, wherein the third input section is joined to the main dip tube section. 18. The fluid delivery device of claim 17, further comprising a fourth input section capped by a fourth hydrophilic membrane to prevent air from entering into the fourth input section during the use of the dip tube, wherein the fourth input section is joined to the main dip tube section. 19. The fluid delivery device of claim 14, wherein a cross sectional flow area of a downstream portion of the first input section taken perpendicular to a flow direction of the first input section is less than the third cross sectional flow area of the third venturi portion.