US4034493A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid novelty device
Assignee: Mattel Inc
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Filing: 1975-10-29
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Granted: 1977-07-12
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Expires: 1995-10-29
Abstract
Abstract A display device consisting of a sealed chamber defined by two closely spaced panes or plates of a transparent or translucent material. Liquids of different specific gravities and selected viscosities are located in the chamber. In operation, the device is inverted and the liquid of the heavier specific gravity flows through the liquid of the lighter specific gravity in distinct, spaced apart beads or droplets under the influence of gravity. The downward flow of the heavier liquid causes the upward displacement of the lighter liquid. A series of obstructions of various shapes and geometric configurations are interposed in the flow path of the heavier liquid to change its flow path and create the visual display.
Inventors
- 👤 Derek W. Ball
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:26
CPC Classifications
B; B44; B44F; B44F1/00; B44F1/06; B44F1/066; G; G09; G09F; G09F13/00; G09F13/24
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
147 words
A display apparatus comprising: a sealed container defined by two closely spaced apart transparent or translucent plates having a main chamber and at least one reservoir located at one end of the chamber, the reservoir having at least one aperture opening into the main chamber; a first liquid of a first specific gravity contained within the container; a second liquid of a second specific gravity lighter than the said first specific gravity contained within the container, the second liquid being immiscible with said first liquid and having a predtermined viscosity; and at least one obstruction of a thickness equal to the depth of the main chamber disposed in the main chamber in a liquid flow path extending from the aperture, the obstruction being oriented within the chamber such that the first liquid is caused to be broken into beads of liquid as it moves past the obstruction.
Claim 2
Dependent Claim
147 words
A display apparatus comprising: a sealed container defined by two closely spaced apart transparent or translucent plates having a main chamber and at least one reservoir located at one end of the chamber, the reservoir having at least one aperture opening into the main chamber; a first liquid of a first specific gravity contained within the container; a second liquid of a second specific gravity lighter than the said first specific gravity contained within the container, the second liquid being immiscible with said first liquid and having a predtermined viscosity; and at least one obstruction of a thickness equal to the depth of the main chamber disposed in the main chamber in a liquid flow path extending from the aperture, the obstruction being oriented within the chamber such that the first liquid is caused to be broken into beads of liquid as it moves past the obstruction.
Claim 3
Dependent Claim
27 words
A display apparatus according to claim 1 wherein the viscosity of the second liquid is selected such that the beading action of the first liquid is enhanced.
Claim 4
Dependent Claim
25 words
A display apparatus according to claim 1 wherein the first liquid is a water miscible, oil immiscible liquid and the second liquid is an oil.
Claim 5
Dependent Claim
30 words
A display apparatus according to claim 1 including a reservoir having at least one aperture located at opposite ends of the chamber whereby the action of the apparatus is reversible.
Claim 6
Dependent Claim
37 words
A display apparatus according to claim 4 wherein a baffle is located opposite each reservoir aperture and oriented such that the first liquid flowing through said aperture is broken into two or more streams of liquid beads.
Claim 7
Dependent Claim
36 words
A display apparatus according to claim 5 wherein the obstruction in the main chamber is located intermediate the baffles and oriented such that the liquid beads flowing from the end of the baffle encounter the obstruction.
Claim 8
Dependent Claim
36 words
A display apparatus according to claim 6 wherein the obstruction is asymetrically disposed within the chamber such that a different flow pattern of liquid beads is produced each time the orientation of the apparatus is reversed.
Claim 9
Dependent Claim
20 words
A display apparatus according to claim 7 inluding a plurality of obstructions of different configurations located within the main chamber.
Claim 10
Dependent Claim
31 words
A display apparatus according to claim 8 wherein the translucent plates are fabricated of a transparent acrylic material, the first liquid is glycerin and the second liquid is a light oil.
Claim 11
Dependent Claim
28 words
A display apparatus according to claim 9 including a first coloring agent added to the first liquid and a second, contrasting coloring agent added to the second liquid.
Claim 12
Dependent Claim
26 words
A display apparatus according to claim 10 including a support means for the apparatus whereby the apparatus may be inverted and displayed on a horizontal surface.
Claim 13
Dependent Claim
149 words
A display apparatus comprising: a sealed container defined by two thin, closely spaced apart transparent or translucent plates having a main chamber and at least one reservoir located at one end of the chamber, the spacing of the two plates being approximately equal to the thickness of one of said plates and the reservoir having at least one aperture opening into the main chamber. a first liquid of a first specific gravity contained within the container, a second liquid of a second specific gravity lighter than said first specific gravity contained within the container, the second liquid being immiscible with said first liquid and having a predetermined viscosity, and at least one obstruction disposed in the main chamber in a liquid flow path extending from the aperture, the obstruction being oriented within the chamber such that the flow of the first liquid is diverted as it encounters the obstruction.
Claim 14
Dependent Claim
149 words
A display apparatus comprising: a sealed container defined by two thin, closely spaced apart transparent or translucent plates having a main chamber and at least one reservoir located at one end of the chamber, the spacing of the two plates being approximately equal to the thickness of one of said plates and the reservoir having at least one aperture opening into the main chamber. a first liquid of a first specific gravity contained within the container, a second liquid of a second specific gravity lighter than said first specific gravity contained within the container, the second liquid being immiscible with said first liquid and having a predetermined viscosity, and at least one obstruction disposed in the main chamber in a liquid flow path extending from the aperture, the obstruction being oriented within the chamber such that the flow of the first liquid is diverted as it encounters the obstruction.
Claim 15
Dependent Claim
32 words
a display apparatus according to claim 12 wherein the viscosity of the second liquid is selected such that the first liquid is broken into individual beads as it moves past the obstruction.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |