Flexible convertible hotplate adapter for rounded vessels and objects

Abstract

The present invention is an article or device to facilitate the heating of rounded vessels and other rounded objects comprising a flexible polymeric support having a plurality of folds so as to form the flexible polymeric support into a plurality of nested, concentric hollow cylindrical portions whose respective upper edges can be arranged and fixed into two or more configurations to accommodate at least two respective spherical section contours of respective different sizes. The present invention facilitates the heating of rounded, regularly-shaped or irregularly-shaped vessels or objects by presenting a flexible polymeric support surface. The flexible polymeric support surface is sufficiently malleable so as to be adapted for heating such objects or containers, and may be incorporated into an arrangement or system for heating such a container or object, and/or for stirring its contents, while being supported by the article or device of the present invention.

Claims

1. A device to facilitate the heating of rounded vessels and other rounded objects comprising: a flexible polymeric support comprising: a plurality of folds so as to form said flexible polymeric support into a plurality of nested, concentric hollow cylindrical portions each having respective upper edges and adapted to be arranged and fixed in at least two configurations such that said upper edges of said concentric hollow cylindrical portions accommodate at least two respective spherical section contours of at least two respective different sizes, and so as to be adapted to contact rounded vessels or other rounded objects of two respective different sizes.

2. The device according to claim 1 wherein said concentric hollow cylindrical portions comprise: a heat-conducting polymeric material selected from the group consisting of heat- conducting silicone rubbers.

3. The device according to claim 1 additionally comprising: a magnetic stirrer for creating a rotating magnetic field for purposes of stirring a vessel containing a magnet and disposed on said flexible polymeric support.

4. The device according to claim 1 additionally comprising: a temperature-sensing device selected from the group consisting of thermometers and thermocouples.

5. A device to facilitate the heating of rounded vessels and other rounded objects comprising: a flexible polymeric support comprising: a plurality of folds so as to form said flexible polymeric support into a plurality of nested, concentric hollow cylindrical portions each having respective upper edges and adapted to be reversibly moved from a collapsed configuration wherein said upper edges are coplanar to a fixed configuration such that said upper edges of said hollow cylindrical portions accommodate the shape of a spherical section contour.

6. The device to facilitate the heating of rounded vessels and other rounded objects comprising: a flexible polymeric support comprising: a plurality of folds so as to form said flexible polymeric support into a plurality of nested, concentric hollow cylindrical portions each having respective upper edges and adapted to be reversibly moved between two deployed configurations such that said upper edges of said hollow cylindrical portions accommodate respectively the shapes of at least two different spherical section contours.

7. The device according to claim 1 wherein said flexible polymeric support comprises: an upper side adapted to contact a container of one of said at least two spherical section contours and a lower side opposite said upper side, and additionally comprising a thermally conductive container disposed on said lower side of said flexible polymeric support, said thermally conductive container containing a thermally conductive filler material.

8. The device according to claim 5 wherein said flexible polymeric support comprises: an upper side adapted to contact a container having a spherical section contour and a lower side opposite said upper side, and additionally comprising: a container disposed on said lower side of said flexible polymeric support, said container containing a thermally conductive fluid.

9. The device according to claim 6 wherein said flexible polymeric support comprises: an upper side adapted to contact a container of one of said at least two spherical section contours and a lower side opposite said upper side, and additionally comprising: a container disposed on said lower side of said flexible polymeric support, said container containing a thermally conductive fluid.

10. A device according to claim 7. wherein said thermally conductive filler material is selected from the group consisting of liquids, pastes, putties, greases and gums.

11. A device according to claim 1 additionally comprising: a handle portion.

12. A device according to claim 1 wherein said a flexible polymeric support comprises: a flexible polymeric support surface comprising: thermal interface silicone rubber compositions selected from the group consisting of silicone rubber compositions and fluoro-silicone rubber compositions, said thermal interface silicone rubber compositions containing substantially uniform dispersions of filler particles selected from the group consisting of thermally-conducting metals, minerals and ceramics.

13. A device according to claim 10 wherein said malleable material is selected from the group consisting of (a) high-temperature-resistant thermal-transfer fluids, silicone oil thermal transfer fluids and silicone fluids, (b) silicone greases and (c) silicone materials containing a substantially-uniform dispersion of thermally-conducting filler particles selected from particles of heat-conducting metals, mineral particles and ceramic particles.

14. A device according to claim 1, said device adapted to be arranged and fixed in four configurations such that said upper edges of said concentric hollow cylindrical portions accommodate respective round-bottomed flasks of four different respective different sizes at their respective bottoms.

Description

BRIEF DESCRIPTION OF THE FIGURES

(1) While the specification concludes with claims particularly pointing out and distinctly claiming the present invention, it is believed that the present invention will be better understood from the following description in conjunction with the accompanying Drawing Figures, in which like reference numerals identify like elements, and wherein:

(2) FIG. 1 is a sectioned lateral perspective view of a convertible hotplate adapter in accordance with aspects of the present invention, in a deployed configuration.

(3) FIGS. 2a through 2d are top sectioned perspective views of a convertible hotplate adapter in accordance with aspects of the present invention, and show in respective deployed configurations.

(4) FIGS. 3a and 3b are top perspective views of a hotplate bearing a convertible hotplate adapter in accordance with aspects of the present invention, with the convertible hotplate adapter shown in respective deployed configurations.

(5) FIG. 4 is a top perspective view of a convertible hotplate adapter, in accordance with aspects of the present invention, and showing a container in position to be received thereby, in accordance with aspects of the present invention.

(6) FIG. 5 is a transparent elevation view of the present invention comprising a polymeric heat-transfer device combined with a hotplate-magnetic stirring apparatus, and a magnetic follower, as used for heating and stirring the contents of a round-bottomed flask, in accordance with one embodiment of the present invention.

DETAILED DESCRIPTION OF VARIOUS EMBODIMENTS OF THE INVENTION

(7) In the following detailed description of the preferred embodiment, reference is made to the accompanying drawings that form a part hereof, and in which is shown by way of illustration, and not by way of limitation, a specific preferred embodiment in which the invention may be practiced. It is to be understood that other embodiments may be utilized and that changes may be made without departing from the spirit and scope of the present invention.

(8) FIG. 1 illustrates one embodiment of the present invention as shown in a cut-away, cross-sectional view. In this embodiment, the invention device comprises a flexible skin or shell, 5, filled with a liquid, paste, putty, grease, gum or other malleable substance 6.

(9) The materials of construction of both the skin 5 and the filler substance 6 are chosen from materials which are resistant to substantial degradation when exposed to the range of temperatures the device is expected to experience in normal use; that is, comprising materials which substantially retain their mechanical properties up to temperatures of about 180 C. or greater for practical periods of time. The material of constructions for 5 is chosen from soft, malleable or flexible metals or metal alloys or chosen from high-temperature-resistant organic polymers such as polyimide films. One type of high-temperature-resistant polyimide film is known by the trade name: Kapton (DuPont Chemicals). Most preferentially, the material of construction of 5 is a silicone rubber or a fluorosilicone rubber and, further, 5 preferentially comprises a silicone rubber with superior thermal conductivity, in other words, a material with superior heat conductivity properties. Examples of high-temperature-resistant materials of this type are known in the art as thermal interface silicone rubbers and are materials chosen from various silicone rubber compositions containing substantially-uniform dispersions of filler particles chosen from thermally-conducting metals, minerals, ceramics or other inorganic or organic materials. The chosen thermal interface silicone rubber, preferentially, will have a thermal conductivity greater than 1 W m.sup.1 K.sup.1. In one embodiment the skin/shell, 5, thickness is in the range of about 0.1 mm to 15 mm but preferentially it is about 2 mm in thickness.

(10) The composition of the moldable/malleable/fluid filler material 6 is to be chosen from high-temperature-resistant thermal-transfer fluids, some examples of which are known by the trade names of Paratherm (Paratherm Corp.), Dowtherm (Dow Chemical Corporation), and Therminol (Eastman Chemical Co.). Still other high-temperature-resistant thermal transfer fluids and materials are known to persons skilled in the art. The preferred moldable/malleable filler substance is a silicone oil such as Syltherm XLT HTF, Syltherm 800 Stabilized HTF, Syltherm HF HTF, (all marketed by Dow Chemical Company) or a silicone fluid, silicone grease or silicone paste and, further, 6 is preferentially a silicone oil, a silicone fluid, a silicone grease or a silicone paste containing a substantially-uniform dispersion of substantially thermally-conducting filler particles such as are chosen from particles of various metals, mineral particles, ceramic particles or other inorganic materials. A silicone paste with continuous thermal stability to 200 C. and very high thermal conductivity is marketed under the trade name Omegatherm 201 by OMEGA Engineering, Inc. Heat-Away 6400 is a high-temperature thermally conductive, copper-filled silicone grease marketed by Aremco Product, Inc. and suitable for heat transfer applications from 51 C. to 288 C. Still other suitable high-temperature thermally conductive fluids, pastes or greases are known to persons skilled in the art.

(11) In one embodiment, the device is constructed to form an object or article which is substantially flat on one face (designated as the bottom) and is substantially shaped, on the opposite face, (designated as the top) to form a pocket, socket, cavity or basin such as may conform to the profile of a round-bottomed vessel or to the shape of some other rounded or regularly or irregularly shaped object to be situated or nested in the pocket.

(12) Another embodiment is also shown in FIG. 1. In this embodiment, the device substantially forms the contours of a truncated cylinder in its overall shape and is substantially flat on one face of the cylinder (designated as the bottom). In this embodiment of the present invention, the device may be reshaped or transformed from being adapted to accommodate a flask of one of four different capacities, either 1.0 L, 500 mL, 250 mL, or 100 mL to then, reversibly, be reshaped or transformed to accommodate a flask of one of the remaining three capacities. For example, the device adapted to accommodate a 1.0 L capacity flask may be changed to accommodate a flask of 500 ml capacity and then reversed to again accommodate a 1.0 L flask. This embodiment of the present invention comprises five concentric circular pleats or flutes (7, 8, 9, 10, 11) which are formed as folds in the skin 5 of the top face of the device such that a basin or crater of a certain size and shape is formed as a result of a process whereby one or more of the pleat/flutes is substantially tightly folded-in on itself and whereby, simultaneously, one or more of the other pleats/flutes is substantially opened or unfolded. Viewing the device as truncated cylinder, the circumferential edge profile comprises a lower lateral circumferential segment, 12, of about 1.0 in in width, a center circumferential segment, 13, of about 1.5 inches in width and an upper lateral circumferential segment, 14, of about 1.0 in in width. The skins or surfaces of the three circumferential segments 12, 13, 14, are substantially folded, forming, within each, one or more pleats or flutes, preferably, with the longer aspect of each pleat or flute oriented perpendicular to the circumference of the cylindrical shape of the device. The angles formed by intersection of the upper circumferential segment, 12, and lower circumferential segment, 14, with the center circumferential segment 13, and, in turn, the angle formed by intersection of the upper circumferential segment with the top face and the intersection of the lower circumferential segment with the bottom face, are changeable by compressing (squeezing) or relaxing the center circumferential wall.

(13) Viewed as a cylinder, changing the device's diameter by compression of (squeezing) the side(s) of the device will cause the incompressible filler fluid to push the top face up and away from the bottom face. In other words, the height of the device will vary inversely with its diameter because the volume of the device will remain essentially constant even as the device is adjusted to accommodate flasks of different capacities.

(14) This embodiment of the present invention further comprises a lifting ring, 3, (FIG. 1). The lifting ring is substantially flat and circular with a thickness of about 4 mm, an inner diameter of about 140 mm and an outer diameter of about 170 mm. The lifting ring is attached to the skin or shell 5 with its center located at the center of the top face. The composition of the lifting ring 3 is chosen from materials which are both substantially ridged and which are substantially thermally stable at temperatures of 150 C. or greater. Materials of construction for the lifting ring are chosen from metals, glass-fiber-reinforced phenolic resin composites, ceramics and from other suitable materials known to persons skilled in the art. The lifting ring, 3, is attached by means of rivets or other mechanical fasteners or it is attached by means of an adhesive, the adhesive being stable to the elevated temperatures expected to be experienced by the device. Alternatively, the lifting ring, 3, may be encapsulated within, or otherwise integrated with the skin of the device.

(15) FIGS. 2a, 2b, 2c, and 2d illustrate four modalities or transformations of one embodiment the present invention rendered in four cross-sectional views. FIG. 2a illustrates one modality or transformation of the present invention adapted to accommodate a 100 mL flask by the substantial unfolding of pleats 1 and 2 while pleats 3, 4 and 5 are substantially folded. FIG. 2b illustrates another modality or transformation of the present invention adapted to accommodate a 250 mL flask by the substantial unfolding of pleats 2 and 3 while pleats 1, 4 and 5 are substantially folded. FIG. 2c illustrates still another modality or transformation of the present invention adapted to accommodate a 500 mL flask by the substantial unfolding of pleats 3 and 4 while pleats 1, 2 and 5 are substantially folded. FIG. 2d illustrates still another modality or transformation of the present invention adapted to accommodate a 1000 mL flask by the substantial folding of pleats 1 and 2 while pleats 3, 4 and 5 are substantially unfolded.

(16) In one embodiment, the lifting ring 3, is encapsulated by a coating, designated as the lifting ring shell, 2, (FIG. 1) which is about 2 mm in thickness. The composition of the lifting ring shell ring shell 2 is chosen from, thermally-stable materials and preferentially, it comprises a material with relatively low thermal conductivity such as a silicone rubber which contains no thermally-conductive filler material. One purpose for the lifting ring shell is to provide insulation and a cooler surface to touch with the hand. Attached to or integrated with the lifting ring are two or more handles, for example, 1, (FIG. 1). In one embodiment the handle, 1, is an expanded region of the lifting ring extending beyond the lateral margins of the top face of the device. The purpose of the lifting ring is to provide a place for attachment of the handle or handles, and, in addition the lifting ring facilitates the adjustment of the device to flasks of different capacities by facilitating the opening (unfolding) and closing (folding) of the concentric pleats.

(17) In one embodiment, the device or article comprises a partial covering of a second skin or shell, 4, (FIG. 1) exterior to the first skin or shell, which is substantially thermally-insulating and which is substantially thermally-stable at temperatures of 100 C. or greater.

(18) FIG. 3a and FIG. 3b illustrate one embodiment of the present invention in two of its four potential configurations/transformations. FIG. 3a illustrates the invention adapted for use with a 100 mL round-bottomed flask and FIG. 3b illustrates the invention adapted for use with a 1000 mL flask. FIG. 3a and FIG. 3b further illustrate the present invention in combination with hot plate stirrers and with round-bottomed flasks, thus showing the utility of the present invention as a means of heating rounded laboratory vessels.

(19) FIG. 4 illustrates another embodiment of the present invention. This embodiment of the present invention comprises a thermally conductive fluid within a thermally conductive skin and forms the overall shape of a truncated cylinder. This embodiment further comprises an angled U-tube-shaped pocket, 15, visibly emerging from the top face as two circular holes. This embodiment further comprises a slot or channel 16, about 5 mm in width, extending across the top face of the device from one hole to the other hole and further extending downward perpendicular to the top face, to a depth such that it merges with the U-shaped pocket, 15. As shown in FIG. 4, the effect of the overall shape of the U-shaped pocket in combination with the slot allows a Thiele tube 17, to be snuggly fitted into the device and supported in an upright position by the device.

(20) Another embodiment of the present invention may comprise a thermocouple integrated with the device or inserted in slots or holes in the device such that the thermocouple probe may be plugged by means of a thermocouple pair of wires into the external temperature control of a hotplate or similar device.

(21) FIG. 5 illustrates one embodiment of the present invention by showing a transparent elevation view of the present invention as shown generally in FIG. 3b, including a combination with a round-bottomed flask 18; a follower magnet. 20, positioned inside the flask; a rotating magnet 21, positioned internal to the hotplate-magnetic-stirrer apparatus; and an electric motor 22 to turn the rotating magnet 21, also positioned within the hotplate-magnetic- stirrer apparatus. Another embodiment of the present invention may comprise a temperature sensing device, here depicted as a thermocouple, 23, integrated with the device or inserted in an orifice, 24 or slots or holes in the device such that the thermocouple probe, 23, may be plugged. by means of a thermocouple pair of wires, 25, into the external temperature control of a hotplate or similar device. FIG. 5 further illustrates the flexible polymeric support comprising a container, 19. containing a thermally-conductive fluid, 6.

(22) While particular embodiments of the present invention have been illustrated and described, it would be obvious to those skilled in the art that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims, which themselves constitute part of the disclosure, all such changes and modifications that are within the scope of this invention.

(23) The following references are hereby incorporated herein by reference:

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