Agitating – Operator supported
Patent
1994-10-05
1996-01-09
Scherbel, David
Agitating
Operator supported
416 70R, 416227R, A47J 4310
Patent
active
054823676
DESCRIPTION:
BRIEF SUMMARY
FIELD AND BACKGROUND OF THE INVENTION
This invention relates to devices for manually whisking liquids or semi-liquids such as for example milk, egg whites or salad dressings into a frothy or otherwise mixed condition. The use of such devices enables suitable liquids or semi-liquids to be completely aerated, such as whipped egg white, partially aerated, such as hot milk for cappuccino coffee, or simply well blended or homogenised, such as salad dressings.
Such whisking devices have been known for many years. Today, devices powered by electric motors are common, and manual whisking devices are not as much in favour as they were twenty or thirty years ago. One reason for this is that manual devices have not been particularly easy to use or to clean. Another reason is that devices for single-handed use have not been particularly effective, and have required concerted wrist action for a substantial length of time to attain a satisfactorily high degree of frothing.
A traditional device for single-handed operation consists of a plurality of stainless steel loops joined at their ends in a coiled steel handle. However, as mentioned above, a good deal of practice and of wrist strength is required before the device can be used to anything approaching satisfaction.
A device for double-handed use was proposed in GB706803. It consists of a plurality of metal coils fixed to the base of a rotatable shaft, rotation being achieved by means of a cog mounted on the upper end of the shaft and driven by a crown wheel worked by a handle. Devices of this general kind have been common, but they suffer from the following drawbacks.
Firstly, they consist of a number of moving and fixed parts which have to be manufactured and then assembled. This makes them costly. Secondly, they are not particularly easy to operate and can be quite tiring to the hands. Thirdly, they have many surfaces which are virtually inaccessible for cleaning and drying purposes. Fourthly, their ungainly shape and size makes for inconvenience in storage.
SUMMARY OF THE INVENTION
It is an object of this invention to provide a manual whisking device which is much simpler in construction than the prior art devices described, making for lower manufacturing costs. A further object is to provide a device which is considerably easier for a user to operate. A further object is to provide a device which is easier to clean and dry than prior art devices of the kind described above.
According to the invention there is provided a manual whisking device comprising: being of uniform circular cross section over at least a substantial part of its length and the diameter of the cross section being such that the rod can be comfortably spun at high rotational speed when held between the palms of a user by counterwise linear palm movement; and one end of the rod and adapted in use to aerate a liquid or semi-liquid by the forwards and backwards rotation of the said rod.
We have discovered that surprising efficiency of aeration rate may be achieved by a device according to the invention. Part of this is due to the rotation speed of the rod which can be generated simply by, effectively, rubbing the two palms together with the rod interposed between. The smaller the diameter of circular cross-sectional part of the rod, the greater will be the rotational speed, and vice versa. However if the diameter is too small, the device will be difficult to operate as the hands will rub together over part of their surfaces. Equally, if the diameter is too great, the rotational speed will be slowed, and more passes of the lands will be needed to obtain the same result.
We have found that the diameter is preferable in the range of 11 mm to 15 mm, most preferably around 13 mm.
Preferably, the rod is of uniform circular cross section throughout its length, which is preferable in the range of 35 cm to 45 cm, ideally about 40 cm.
The toroidal coils of wire may be fixed to the rod in any suitable way, but we provide as a preferred feature of the invention that they are fixed by simple loops of wire pa
REFERENCES:
patent: 647341 (1900-04-01), Tutt
patent: 671516 (1901-04-01), Hegner
patent: 698065 (1902-04-01), Sims
patent: 781917 (1905-02-01), Smith
patent: 1140341 (1915-05-01), Johnston et al.
patent: 1227327 (1917-05-01), Sheaffer
patent: 1627314 (1927-05-01), Boynton
patent: 1627315 (1927-05-01), Boynton
patent: 1925638 (1933-09-01), Killman et al.
patent: 2278398 (1942-03-01), Wittmann
patent: 2670938 (1954-03-01), Wittmann
patent: 2798702 (1959-07-01), Fjellstedt
patent: 2836402 (1958-05-01), Barnes et al.
patent: 2906510 (1959-09-01), Harris
patent: 4380192 (1983-04-01), Doren
patent: 5037210 (1991-08-01), Bliss
Khan Kameel I. F.
Randell Julia
Cooley Charles E.
Scherbel David
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