EP0629435B1 - Mixing apparatus for cooking vessels - Google Patents

Mixing apparatus for cooking vessels Download PDF

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Publication number
EP0629435B1
EP0629435B1 EP94850097A EP94850097A EP0629435B1 EP 0629435 B1 EP0629435 B1 EP 0629435B1 EP 94850097 A EP94850097 A EP 94850097A EP 94850097 A EP94850097 A EP 94850097A EP 0629435 B1 EP0629435 B1 EP 0629435B1
Authority
EP
European Patent Office
Prior art keywords
wings
vessel
mixing apparatus
shaft
drive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94850097A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0629435A1 (en
Inventor
Göran Persson
Lars-Erik Johansson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0629435A1 publication Critical patent/EP0629435A1/en
Application granted granted Critical
Publication of EP0629435B1 publication Critical patent/EP0629435B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/051—Stirrers characterised by their elements, materials or mechanical properties
    • B01F27/054—Deformable stirrers, e.g. deformed by a centrifugal force applied during operation
    • B01F27/0542—Deformable stirrers, e.g. deformed by a centrifugal force applied during operation deformable by centrifugal force

Definitions

  • the present invention refers to a mixing apparatus for mixing and stirring liquid or paste-like masses in a cylindric cooking vessel, comprising at least one vertical drive-shaft which is connected to drive means, said drive-shaft being located primarily coaxial with or in line with the longitudinal axis of the vessel, and which is provided with attachments for at least three agitator wings, said wings being radially displaceable connected to each respective attachment, so that the radially outer ends of the agitator wings during rotation elastically press against the inner surface of the vessel.
  • Cooking vessels with mixing apparatus are used in large kitchens and are for example known from SE-A-425210 which discloses a drive unit that can be raised and lowered. Often, the drive unit is arranged so that it can move or swing over from one pot to another. Because the development has gone in the direction towards mixing apparatuses with scrapers of plastic- or rubber material which keeps the sides and the bottom of the vessels clean, the increased friction has created more stresses upon the drive unit and its stand. The drive unit and its stand can of course be made stronger, to compensate for the increased loads. This is however comparatively expensive, due to the ability of the drive unit to be raised and lowered.
  • SE-A-455264 describes a cooking vessel with a dismountable horizontal stay that holds the mixing apparatus, even if the drive unit is disconnected.
  • a drawback with this arrangement is, that the cleaning of the pot is more complicated.
  • the purpose with the use of scrapes or brushes is consequently partly counteracted by this known device.
  • US-A-3381941 discloses a stirring apparatus having radially displaceable stirrer blades.
  • the blades are connected to the shaft via links. Cleaning of this stirring apparatus is difficult, because a large number of screws, bolts or pins must be dismantled in the process.
  • DE-A-3531841 discloses a mixing apparatus having radially displaceable blades. This apparatus is not suitable for cooking vessels, because the blades are journalled in radial slots which are difficult to clean.
  • US-A-2178269 discloses a batter mixer having radially displaceable blades. This apparatus is very expensive to manufacture and also very difficult to clean.
  • the object of the present invention is to provide a mixing apparatus for cooking vessels, which makes it possible to keep the vessels clean in an efficient way while at the same time reducing the stresses upon the drive unit, and which also simplifies mounting and dismounting of the wings without causing surfaces which are difficult to clean.
  • the agitator wing attachments comprise substantially radially pointing rods, which are arranged in parallel pairs, and that the agitator wings are provided with longitudinally running channels for receiving said rods.
  • the channels of the wings are designed in the manner of open slots, wherein the longitudinal opening of one of the slots is angled at least 90° from the other opening.
  • FIG 1 schematically shows a cooking vessel 10 with its cylindric inner wall 11.
  • a mixing apparatus 12 is according to practice connectable to a drive unit which can be raised and lowered in the same manner as described in SE-A-425210.
  • the mixing apparatus 12 includes an upper and a lower agitator rotor 13 and 14 respectively, each of which is provided with an attachment 15 and 16 respectively, for three agitator wings 17. Because of simplicity, Fig. 1 only shows two wings 17 on each rotor.
  • the attachment 16 of the lower agitator rotor 14 is mounted upon an inner shaft 18 which is driven in one direction by the drive unit.
  • the attachment 15 of the upper agitator rotor 13 is mounted on an outer tubular shaft 19 which surrounds the shaft 18 and is driven in the opposite direction by the drive unit.
  • a locking means 20 is used for locking the inner shaft 18 axially with respect to the outer shaft 19.
  • Fig. 2 shows the lower attachment 16 which is provided with three pairs of substantially radially pointing rods 21, 22 having a cylindrical cross section. These are arranged in parallel with a certain dislocation to each side of the rotational axis centre of the shaft 18 (see Fig. 3 and 4).
  • One of the rods 22 has a slightly larger cross section than the other rod 21.
  • the wings 17 have been produced with a profile which appears from Fig. 5, and which makes it possible to manufacture them in a cost efficient way, for example by extrusion.
  • the wings are provided with channels 23, 24 running in the longitudinal direction, and which are dimensioned to receive the rods, which means that the channel 24 is slightly wider than the channel 23. Since each pair of rods that carry one respective wing has different diameter with one another, and the channels 23, 24 have different width, this prevents incorrect mounting of the wings 17 upon the attachments 15, 16.
  • the channel 23 runs from the rear edge of the wing to a distance in parallel with the plane of the wing.
  • the other channel 24 runs in parallel with the channel 23, but from the rear side of the wing and a distance in towards the front of the wing.
  • the angle between the walls on the two channels is slightly larger than 90 degrees, which locks the wing firmly from being twisted loose from the pair of rods 21, 22.
  • the upper rotor 13 is designed in principally the same way as the lower rotor 14. However, the rods 21, 22 are displaced to the opposite side of the rotational centre axis of the shaft 18 as a consequence of that the rotor 13 rotates in the opposite direction.
  • the wings 17 are shaped with a frontal scraper edge 25 which in the lower position of the mixing apparatus makes it possible for the rotor 14 to scrape against the inside 11 of the vessel bottom. Because the wings are held mobile in the radial direction, they are supported elastically compliant against cylindric wall portion of the vessel during the rotation of the apparatus. This means that the wings also can scrape and hold these surfaces clean when raising and lowering the mixing apparatus within the vessel. Besides, an automatic centring of the wings in relation to the centre axis of the vessel is accomplished, which contributes to the centring of the drive-shaft in relation to the inner surface of the vessel and in this manner reduces the stresses upon the drive unit and its stand.
  • the invention is not limited to the above described embodiment, but more variants are conceivable within the scope of the following claims.
  • the wings 17 and attachments 15, 16 can be shaped differently than what is shown.
  • the mixing apparatus need not be provided with double rotors 13, 14.
EP94850097A 1993-06-14 1994-06-07 Mixing apparatus for cooking vessels Expired - Lifetime EP0629435B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9302061A SE511537C2 (sv) 1993-06-14 1993-06-14 Blandarverktyg för kokgrytor
SE9302061 1993-06-14

Publications (2)

Publication Number Publication Date
EP0629435A1 EP0629435A1 (en) 1994-12-21
EP0629435B1 true EP0629435B1 (en) 1997-09-03

Family

ID=20390289

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94850097A Expired - Lifetime EP0629435B1 (en) 1993-06-14 1994-06-07 Mixing apparatus for cooking vessels

Country Status (8)

Country Link
EP (1) EP0629435B1 (sv)
AT (1) ATE157558T1 (sv)
DE (1) DE69405301T2 (sv)
DK (1) DK0629435T3 (sv)
FI (1) FI942787A (sv)
HU (1) HU215286B (sv)
NO (1) NO303813B1 (sv)
SE (1) SE511537C2 (sv)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106943001B (zh) * 2017-05-19 2018-12-11 盐城吉大智能终端产业研究院有限公司 一种三螺旋家用豆浆机
CN110860233B (zh) * 2019-11-30 2021-11-09 重庆瑞霆塑胶有限公司 一种自清洁的搅拌装置
CN111938465B (zh) * 2020-09-03 2021-07-13 杭州富阳福士得食品有限公司 一种肉馅切割装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2178269A (en) * 1939-01-23 1939-10-31 Seybert Theodore Batter mixer scraping mechanism
US3381941A (en) * 1966-08-17 1968-05-07 Fmc Corp Stirring apparatus
HU192436B (en) * 1984-09-07 1987-06-29 Chemimas Vegyigeptervezoe Es F Universal rotor for rotary film devices
GB2194460B (en) * 1986-08-28 1990-08-15 Guisti & Son Ltd T Improvements in or relating to a rotary mixing apparatus
US5197803A (en) * 1991-12-05 1993-03-30 Wall Joseph E Mixer with movable wiper

Also Published As

Publication number Publication date
SE9302061D0 (sv) 1993-06-14
SE511537C2 (sv) 1999-10-11
FI942787A (sv) 1994-12-15
NO303813B1 (no) 1998-09-07
EP0629435A1 (en) 1994-12-21
FI942787A0 (sv) 1994-06-13
DE69405301T2 (de) 1998-04-09
HUT68682A (en) 1995-07-28
DK0629435T3 (da) 1998-04-20
HU215286B (hu) 1998-11-30
NO942158L (no) 1994-12-15
DE69405301D1 (de) 1997-10-09
SE9302061L (sv) 1994-12-15
NO942158D0 (no) 1994-06-10
ATE157558T1 (de) 1997-09-15
HU9401705D0 (en) 1994-09-28

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