Multi-purpose food processor

Details Multi-purpose food processor Multi-purpose food processor

1993-01-28

1995-03-07

Han, Frances

Solid material comminution or disintegration

Apparatus

Comminuting surface provided with openings to permit...

24119912, 2412822, B02C 1812

Patent

active

053950607

DESCRIPTION:

BRIEF SUMMARY
This invention relates to a multi-purpose food processor having a first cylindrical container adapted to be closed by a cover and suitable for insertion of a first driveable processing tool for processing food materials, the first tool being adapted to be coupled by means of a first coupling device to a driving shaft which extends through the bottom of the first container and is adapted to be driven by an electric motor arranged in the housing of the multi-purpose food processor, with a second cylindrical container of a smaller volumetric capacity being insertable into the first container prior to it being closed, and with a second driveable processing tool being insertable through a second container filler opening for processing food materials of smaller quantities, the second tool being adapted to be coupled to the driving shaft by means of a second coupling device, and with the cover, on closing the first container, closing at the same time the filler opening of the second container.
A multi-purpose food processor is already known from U.S. Pat No. 4,586,666. When it is desired to chop small quantities of foodstuffs as, for example, parsley or onions, this is hardly possible in the first large-volume container because in the processing of small quantities of food, these are flung against the large inner wall surface of the first container, clinging thereto or collecting on the bottom, so that the cutting blade arranged at a small relative distance to the inner wall and the bottom of the first container is then no longer in a position to seize the food for further processing. To avoid this, a second container of smaller volumetric capacity is inserted into the first container to enable also very small quantities of food to be chopped sufficiently well.
To prevent the food items contained in the second container from being expelled into the first container during processing, the second container is closed by a second lid. Not only does the second lid increase the manufacturing cost of the multi-purpose food processor, it also makes manipulation more difficult, since it invariably requires the second lid to be placed down on the second container, in addition to setting the first lid in place. For example, in the event of an operator's failure to place the second lid down onto the second container, the food material is also expelled into the first container, making processing impossible, apart from contaminating the first container.
Further, from WO 89/00827 a food processor according to the prior-art portion of claim 1 is known in which a second container of a substantially smaller diameter than the first container sits non-rotatably on the forward end of a sleeve centrally disposed in the first container. When the first container is closed by the lid in this multi-purpose food processor, the free rim of the second container becomes engaged by an annular collar formed on the underside of the lid, causing also the second container to be closed by the lid.
In this known multi-purpose food processor, it is to be considered less advantageous that the manufacturing tolerances occurring in the manufacture of the containers and the lid make it impossible in practice to effectively close the second container by the lid, because both the dimension between the outer wall of the second container and the annular collar on the lid in the radial direction and the dimension between the rim of the second container and the underside of the lid in the axial direction will practically never be able to be zero millimeters, so that a clearance is invariably present. This clearance allows the passage of food materials. Accordingly, when mixing drinks in the second container or processing condiments to a very fine degree (powdery), not only the liquid but also the processed food items will find their way over the upper rim of the second container into the first container. Due to the inevitable clearance between the annular collar on the lid and the rim of the second container, vibrations occurring on the second container during

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