Gas and liquid contact apparatus – Fluid distribution – Valved
Patent
1989-04-06
1992-02-18
Miles, Tim
Gas and liquid contact apparatus
Fluid distribution
Valved
261 82, 261DIG16, 366102, 366258, 366332, B01F 304
Patent
active
050891782
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a household apparatus for whipping cream, according to the preamble of claim 1.
Several methods and devices for whipping cream are known. One of the oldest methods is to whip the liquid cream by hand, in a bucket, by means of a whisk. Another well-known process is to place the liquid cream in a sealed receptacle and to inject laughing gas, or another gas, into it under pressure. In gastronomy, special machines are also used to whip cream, machines which add ambient air to the liquid cream, preferably by jerky movements, while pressing this mixture through a conduit occupied by obstacles, forcing the mixture of cream and air to change its direction very rapidly and to flow through a long path, before ending up at a distribution nozzle, from which the whipped cream emerges.
All these known processes present disadvantages, either that they are tiring, or difficult to practice, or further that they are only usable if large quantities of cream are used. Moreover, the machines used in gastronomy for these purposes do not lend themselves to household use, since they are too large and heavy and too expensive for very limited use.
The object of the present invention is to provide a household apparatus which permits even limited quantities of cream to be whipped without problems, and is easy to use.
According to the invention, this object is attained by an apparatus as defined in claim 1. In the following, advantageous embodiments of such an apparatus will be described with reference to the drawings, which show:
in FIG. 1, a partial cross-section through part of a first embodiment of such an apparatus;
in FIG. 2, a cross-section through part of a second embodiment of such an apparatus; and
in FIG. 3, a cross-section through part of a third embodiment of such an apparatus.
in FIG. 4, a cross-section through part of a fourth embodiment of such an apparatus.
In FIG. 1, is seen part of a base 1 comprising, inter alia, an electric motor 2, as well as a base plate of the apparatus, not shown. On this base can be mounted an upper part 3 of the apparatus, including, PG,4 within a rear chamber 10, an eccentric 4, preferably mounted retractably on an axle 5 of the electric motor 2, and being engageable within a transverse oval slot 6 disposed in the rear part 7a of a piston 7, whose middle part 7b is accommodated in a tube 8. The latter can be fixed on the upper part 3, preferably by means of a collar 9 solidly attached to the tube 8. The rear chamber 10, into which the rear part of the piston 7 penetrates, is preferably separated from the empty volume of the tube 8 by a lip gasket 11 bearing on the piston 7. A passage 12 opens into the empty volume of the tube 8, connecting it to a vertical pipe 13 which can be submerged within the liquid cream in a receptacle, not shown, which is placed on the base plate of the apparatus. Within the passage 12 is preferably inserted a ball valve 14, which serves to prevent the liquid cream, once it has been drawn into the free volume of the tube 8, from being driven back. A taphole 15 opens into the passage 12, operating according to the Venturi principle, and serving to draw air into the liquid cream as it rises through the passage 12, ending up within the free volume of the tube 8. Due to the fact that the piston 7 is oscillated along its longitudinal axis by the eccentric 4 actuated by the electric motor 2, a suction is applied to the passage 12. This oscillation of the piston 7 within the tube 8 creates a piston-pumping effect, since it constantly changes the empty volume within the tube 8, between the gasket 11 and the middle part 7b of the piston 7, that is, it expands at the moment the piston 7 is moved to the left, in the drawing, and is compressed at the moment the piston is displaced toward the right, in the drawing, respectively. When the empty volume is expanding, the resultant suction draws liquid cream and air through the passage 12. Since the ball valve 14 closes the passage 12 when the empty space is being compressed, it is impossible for the
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Miles Tim
Spiegel H. Jay
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