Apparatus for comminuting and mixing of foodstuffs

• US 3,957,215 A
• Filed: 09/09/1974
• Issued: 05/18/1976
• Est. Priority Date: 07/05/1974
• Status: Expired due to Term

• Current Assignee: A. Stephan U. Sohne
• Original Assignee: A. Stephan U. Sohne
• Inventors: Otto, Friedrich, Tilch, Heinrich, Rogalski, Manfred, Kollner, Friedrich
• Primary Examiner(s): Custer, Jr., Granville Y.
• Assistant Examiner(s): Goldberg, Howard N.
• Application Number:
  US05/504,665
• Time in Patent Office: 617 Days
• Field of Search: 241/199.12, 241/277, 241/282.1, 241/282.2
• US Class Current: 241/282.1
• CPC Class Codes: A47J 43/046 with tools driven from the bottom side
• CPC Class Codes: B01F 27/808 with stirrers driven from the bottom of the receptacle
• CPC Class Codes: B01F 35/3213 at the lower side of the axis, e.g. driving the stirrer from the bottom of a receptacle
• CPC Class Codes: B02C 18/12 with drive arranged below container B02C18/083 takes precedence
• CPC Class Codes: B02C 18/18 Knives; Mountings thereof

Abstract

A stationary bowl of the apparatus has a bottom wall, and the upright drive shaft of a motor located beneath the bottom wall extends through the same and into the interior of the bowl. A tubular member surrounds the drive shaft out of contact with the same; the other open end of the tubular member is downwardly spaced from the upper end of the drive shaft and the lower end of the tubular member is welded to a tubular collar of a support ring located beneath the bottom wall and extending into the interior of the bowl through the bottom wall outside the tubular member. A second tubular member is placed from above over the shaft and the first tubular member, surrounding the first tubular member with clearance. Cooperating engaging portions at the upper end of the shaft and within the second tubular member engage one another so as to connect the second tubular member with the shaft for joint rotation. The lower end portion of the second tubular member is formed or provided with transversely projecting tool portions, such as comminuting or mixing blades.

Claims

1. In an apparatus for comminuting and mixing of foodstuffs, a combination comprising a stationary bowl having a bottom wall and an upstanding circumferential wall;

a motor mounted beneath said bowl and having an upright output shaft which extends through said bottom wall and projects upwardly within said bowl, said output shaft having an upper end portion;

a first tubular member freely surrounding said output shaft within said bowl and having a first upper open end at a level below said upper end portion, and a lower end which is sealingly connected with said bottom wall;

a second tubular member freely surrounding said first tubular member out of contact therewith and having a second upper end connected with said upper end portion of said shaft for joint rotation therewith, and a second open lower end at a level below said first upper open end; and

transversely projecting tool portions on said second tubular member, said first and second tubular members having an outer and an inner circumferential surface, respectively, which define with one another an annular gap, at least one of said surfaces being formed with spiral converging grooves configurated for converging any material entering said gap in direction towards said bottom wall so that said material cannot rise upwardly in said gap.

2. In an apparatus for comminuting and mixing of foodstuffs, a combination comprising a stationary bowl having a bottom wall and an upstanding circumferential wall;

a motor mounted beneath said bowl and having an upright output shaft which extends through said bottom wall and projects upwardly within said bowl, said output shaft having an upper end portion;

a first tubular member freely surrounding said output shaft within said bowl and having a first upper open end at a level below said upper end portion, and a lower end which is sealingly connected with said bottom wall;

a second tubular member freely surrounding said first tubular member out of contact therewith and having a second upper end connected with said upper end portion of said shaft for joint rotation therewith, and a second open lower end at a level below said first upper open end;

transversely projecting tool portions on said second tubular member;

a support for said bowl located beneath the latter;

a guide ring on said support, surrounding the axis of rotation of said shaft and being formed with circumferentially extending slots;

a mounting ring on said bowl beneath said bottom wall thereof, said bottom wall having an opening through which said shaft and said first tubular member extend, said first tubular member being welded to said mounting ring; and

projections on a downwardly directed surface of said mounting ring and adapted to enter into the respective slots and to cooperate with the same to form a bayonet closure.

3. A combination as defined in claim 2, said mounting ring having a center hole bounded by an upstanding sleeve portion which extends into said opening about said first tubular member and is welded to the latter within said bowl.

4. A combination as defined in claim 2, said support having a top portion which supports said bowl and a base portion which has a diameter greater than the diameter of said bowl and is weighted.

5. In an apparatus for comminuting and mixing of foodstuffs, a combination comprising a stationary bowl having a bottom wall and an upstanding circumferential wall;

a motor mounted beneath said bowl and having an upright output shaft which extends through said bottom wall and projects upwardly within said bowl, said output shaft having an upper end portion;

a stationary first tubular member freely surrounding said output shaft within said bowl and having a first upper open end at a level below said upper end portion, a lower end sealingly connected with said bottom wall, and an outer circumferential surface;

a second tubular member freely surrounding said first tubular member out of contact therewith and having a second upper end connected with said upper end portion of said shaft for joint rotation therewith, a second open lower end at a level below said first upper open end, and an inner circumferential surface which defines with said outer circumferential surface an annular gap;

means in said annular gap for conveying any material entering said gap in direction towards said bottom wall so as to prevent the material from rising upwardly in said gap; and

transversely projecting tool portions on said second tubular member.

6. In an apparatus for comminuting and mixing of foodstuffs, a combination comprising a stationary bowl having a bottom wall and an upstanding circumferential wall;

a motor mounted beneath said bowl and having an upright output shaft which extends through said bottom wall and projects upwardly within said bowl, said output shaft having an upper end portion;

a first tubular member freely surrounding said output shaft within said bowl and having a first upper open end at a level below said upper end portion, and a lower end which is sealingly connected with said bottom wall;

a second tubular member freely surrounding said first tubular member out of contact therewith and having a second upper end connected with said upper end portion of said shaft for joint rotation therewith, and a second open lower end at a level below said first upper open end; and

transversely projecting tool portions on said second tubular member, said first and second tubular members having an outer and an inner circumferential surface, respectively, which define with one another an annular gap, at least one of said surfaces being formed with spiral conveyor grooves diverging in direction towards said bottom wall so as to convey any material entering said gap in direction towards the bottom wall and to prevent the material from rising upwardly in said gap.