Solid material comminution or disintegration – Apparatus – Cooperating comminuting surfaces
Patent
1995-10-24
1997-06-17
Husar, John M.
Solid material comminution or disintegration
Apparatus
Cooperating comminuting surfaces
2412821, B02C 1806, B02C 1808
Patent
active
056390343
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a working bowl for an electrically powered domestic kitchen appliance.
BACKGROUND OF THE INVENTION
Working bowls for electrically powered domestic kitchen appliances include among other tools, a relatively fast-spinning, blade-like working tool is to be able to rotate, with at least one end of the blade-like tool being invariably guided in close proximity to the inner wall of the working bowl as the tool rotates.
A working bowl of this type for an electrically powered domestic kitchen appliance is known in the art from DE-28 50 724 C2. This working bowl has on its inner wall ribs extending into the bowl interior and serving the function of improving and speeding up the food comminuting process in the use of the kitchen appliance. In operation, the food items are comminuted by the rotating blade and flung against the ribs where they are slowed down and flung back to the blade to be further comminuted by that blade. However, the rib structure renders manufacture and cleaning of the working bowl considerably more difficult.
It is therefore an object of the present invention to improve upon a working bowl of the type initially referred to such as to enable the food items contained therein to be comminuted or processed by a rotating working tool in a minimum of time, and to afford ease of manufacture of the working bowl in addition to enabling it to be readily cleaned by hand following use.
SUMMARY OF THE INVENTION
According to the present invention, the cross-section of the inner wall of the working bowl takes the form of a substantially regular polygon having at least five sides, and that the axis of rotation of the blade-like tool lies at the center of the circumcircle of the respective polygon. Because the inner wall of the working bowl is formed by a substantially regular polygon, that is, all of its sides are of approximately equal length, the food materials are comminuted in the working bowl particularly rapidly, especially when a rotary cutter blade is utilized. After the food impinges against the inner wall, the polygonal profile causes the food to be deflected from the inner wall and directed back to the bite of the blade for further comminution. Considering that this process is repeated several times within a minimum of time, uniform comminution of the food is accomplished after an only brief period of operation of the domestic kitchen appliance. It is noted that a bowl configured in this fashion is of equal advantage as in the kneading of dough, the dough inside being worked thoroughly by the rotating dough hook, while the dough outside is worked by the polygonal structure of the inner wall. The invention may also contemplate the provision of a polygon having sides of different lengths.
The working bowl of the present invention affords particular ease of manufacture and cleaning by reason of the absence of sharp corners and projections that would necessitate intricate injection molds for the manufacture of the working bowl. By virtue of the polygonal configuration of the bowl wall, the food items are initially directed into the individual corners and, pushed on by the straight connecting surfaces, are rapidly fed back to the working tool, thus enabling a substantially more intensive processing of the food items to be accomplished without the need for an intricately shaped working bowl.
To provide a working bowl whose wall is of nearly uniform thickness over its entire circumference, a further feature of the present invention provides for the outer wall to extend at a small relative distance and parallel to the inner wall. With a working bowl configured in this manner, the cost of the material is maintained particularly low.
However, it can also be considered that the cross-section of the outer wall is formed by a circle whose center lies at the center of the circumcircle and whose diameter is slightly greater than the diameter of the circumcircle. In a working bowl of this type, the wall thickness of the working bowl varies continuously, the wal
REFERENCES:
patent: 2585255 (1952-02-01), Kochner et al.
patent: 2585925 (1952-02-01), Gallenkamp
patent: 3493022 (1970-02-01), Mantelet
patent: 4752041 (1988-06-01), Franke et al.
patent: 5205500 (1993-04-01), Eide
patent: 5323973 (1994-06-01), Ferrara, Jr.
Braun Aktiengesellschaft
Husar John M.
LandOfFree
Working chamber for an electronically operated domestic kitchen does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Working chamber for an electronically operated domestic kitchen , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Working chamber for an electronically operated domestic kitchen will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2153080