Agitating – Stirrer within stationary mixing chamber – Flexible diaphragm
Patent
1984-11-28
1987-08-11
Jenkins, Robert W.
Agitating
Stirrer within stationary mixing chamber
Flexible diaphragm
366340, B01F 506
Patent
active
046858113
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to apparatus and a method for agitating fluids, for example to effect mixing of two or more fluids, without the intrusion of mixing means through the wall of a container enclosing the fluid medium.
BACKGROUND ART
Known apparatus for agitating a fluid medium comprises a container for the liquid medium; and means movable within the container to effect fluid flow. Movement of this means is effected by driving means which may form part of the apparatus. In this apparatus, the means extend between internal and external parts respectively disposed inside and outside the container.
However, there are occasions where it is desirable and/or necessary to intimately mix two or more fluids in a sealed container without any moving parts entering the container enclosing the fluids. Thus, non-intrusive mixing such as this is required where the contents of a sealed container have to be mixed immediately before use. This might arise, for example, when materials that are stored in sealed containers for prolonged periods separate out into their constituent components. Another application would be the mixing of materials that are toxic, explosive or otherwise dangerous when in contact with air. The mixing apparatus would then have to operate in such a way as to avoid any sealing problems inherent in conventional mixing apparatus involving the use of impellers.
DISCLOSURE OF THE INVENTION
It is an object of the present invention to provide a method and apparatus for this non-intrusive mixing as hereinbefore described.
According to the invention, there is provided apparatus for agitating a fluid medium, for example: to effect mixing of two or more fluids, comprising two compartments (6 and 7) for the fluid medium, conduits (8 and 9, 27 and 28) interconnecting the two compartments and means (10) to vary the pressure in one compartment, characterised in that the conduits are of two types, the conduits of the first type together presenting a lower resistance to flow from one compartment to the other than the conduits of the second type together, and the conduits of the second type together presenting a lower resistance to flow from the other compartment to the one compartment than the conduits of the first type together.
The invention also includes a method of agitating a fluid medium contained in two compartments interconnected by conduits of two types, the conduits of the first type together presenting a lower resistance to flow from one compartment to the other than the conduits of the second type together and the conduits of the second type together presenting a lower resistance to flow from the other compartment to the one compartment than the conduits of the first type together, the method comprising shaking at least one of the compartments so as to vary the pressure of fluid therein.
Apparatus embodying the present invention, for mixing tint with base-colour paint, is hereinafter described by way of example, together with its method of operation, with reference to the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic sectional side elevation of apparatus, in accordance with the invention, for mixing tint with base-colour paint showing part of a clamp-on vibrator for use with the apparatus;
FIG. 2 is a plan view of a partition forming part of the apparatus shown in FIG. 1;
FIGS. 3 and 4 are schematic sectional side elevations of part of the apparatus shown in FIG. 1, illustrating the mode of operation of the apparatus;
FIG. 5 is a schematic sectional side elevation of a preferred embodiment of apparatus in accordance with the invention;
FIGS. 6 and 7 are schematic sectional side elevations of a lid similar to the lid of the apparatus shown in FIG. 1, but illustrating an alternative mode of operation; and
FIG. 8 is a tangential section through a hole of the partition of FIG. 7;
FIG. 9 is a schematic sectional side elevation of an alternative form of apparatus.
MODE FOR CARRYING OUT THE INVENTION
As shown in FIG. 1, a cylindrical paint can 3
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patent: 3855368 (1974-12-01), Prochazka et al.
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patent: 4000086 (1976-12-01), Stoev et al.
patent: 4147481 (1979-04-01), Deutsch
Baker Roger C.
Pollard Geoffrey J.
Jenkins Robert W.
Lavine Irvin A.
The British Hydromechanics Research Association
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