Patent US4261183A successfully refreshed from Google Patents.
US4261183A
Expired / Lapsed
US
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Cooling device
Assignee: Gist Brocades NV
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Filing: 1979-10-04
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Granted: 1981-04-14
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Expires: 1999-10-04
Abstract
Abstract A device for solidifying a layer of a liquid that solidifies upon cooling, such as agar, the liquid being contained in a row of petri-dishes or the like. The device utilizes a horizontally rotatable disc for receiving the dishes, a mechanism for supplying dishes to the disc, and a mechanism for removing the dishes, with solidified liquid, from the disc. A cooling mechanism is positioned below the disc to cool the disc and thereby cool the dishes. A mechanism is provided for slowly rotating the disc so that surfaces of materials in the dishes solidify in a non-rippled manner.
Inventors
- 👤 Ridderus W. Plomp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:33
CPC Classifications
B; B01; B01L; B01L7/00; C; C12; C12M; C12M23/00; C12M23/02; C12M23/10; C12M23/50; F; F25; F25D; F25D13/00; F25D13/06; F25D13/062; Y; Y10; Y10S; Y10S198/00; Y10S198/952
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
100 words
Device for solidifying a layer of a liquid that solidifies upon cooling, such as agar, contained in a row of petri-dishes or the like, said device comprising: a horizontally rotatable disc of heat-conducting material for receiving said dishes, means for supplying petri-dishes or the like to said disc, means for removing the petri-dishes with solidified liquid from the disc, cooling means positioned below the disc for cooling the disc, and means for slowly rotating the disc from said means for supplying to said means for removing so that the surface of material in the dishes solidifies in a non-rippled manner.
Claim 2
Dependent Claim
100 words
Device for solidifying a layer of a liquid that solidifies upon cooling, such as agar, contained in a row of petri-dishes or the like, said device comprising: a horizontally rotatable disc of heat-conducting material for receiving said dishes, means for supplying petri-dishes or the like to said disc, means for removing the petri-dishes with solidified liquid from the disc, cooling means positioned below the disc for cooling the disc, and means for slowly rotating the disc from said means for supplying to said means for removing so that the surface of material in the dishes solidifies in a non-rippled manner.
Claim 3
Dependent Claim
15 words
Device according to claim 1, wherein said disc has a relatively large moment of inertia.
Claim 4
Dependent Claim
22 words
Device according to claim 1 or 2, characterized in that said means for slowly rotating comprises means for flexibly driving said disc.
Claim 5
Dependent Claim
23 words
Device according to claim 3, characterized in that the means for flexibly driving comprises transfer means utilizing an elastic material, such as rubber.
Claim 6
Dependent Claim
21 words
Device according to claim 4, characterized in that the driving means further comprises a motor with a slow start and stop.
Claim 7
Dependent Claim
26 words
Device according to claim 5, characterized in that the means for flexibly driving said disc comprises a driving means located at the periphery of the disc.
Claim 8
Dependent Claim
38 words
Device according to claim 1, characterized in that said means for rotating intermittently rotates said disc so that each petri-dish or the like to be cooled may be pushed onto the disc when the disc is standing still.
Claim 9
Dependent Claim
13 words
Device according to claim 1, characterized in that the disc is rotated continuously.
Claim 10
Dependent Claim
28 words
Device according to claim 1, characterized in that a protecting hood is provided for the disc and that the disc is driven at the periphery of said hood.
Claim 11
Dependent Claim
30 words
Device according to claim 1, characterized in that the rotation speed of the disc is regulated on the basis of the amount of liquid to be dosed in the petri-dishes.
Claim 12
Independent Claim
118 words
A device for solidifying a layer of a liquid that solidifies upon cooling, such as agar, contained in a row of petri-dishes or the like, said device comprising: a horizontally rotatable disc of heat-conducting material for receiving said dishes, means for supplying petri-dishes or the like to said disc, means for removing the petri-dishes with solidified liquid from the disc, cooling means positioned below the disc for uniformly cooling the disc, and means for rotating the disc from said means for supplying to said means for removing, wherein the device is structured such that the disc is rotated and cooled in such a manner to result in a smooth non-rippled surface for the solidified liquid in the dish.
Claim 13
Independent Claim
118 words
A device for solidifying a layer of a liquid that solidifies upon cooling, such as agar, contained in a row of petri-dishes or the like, said device comprising: a horizontally rotatable disc of heat-conducting material for receiving said dishes, means for supplying petri-dishes or the like to said disc, means for removing the petri-dishes with solidified liquid from the disc, cooling means positioned below the disc for uniformly cooling the disc, and means for rotating the disc from said means for supplying to said means for removing, wherein the device is structured such that the disc is rotated and cooled in such a manner to result in a smooth non-rippled surface for the solidified liquid in the dish.
References Cited (Backward Citations)
US3952541A
Cited
US3638451A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-04-13 | 1984-10-13 | 1985-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-13 | 1988-10-13 | 1989-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-13 | 1992-10-13 | 1993-04-14 | $7700.00 | Window Closed / Lapsed |