EP0629435B1 - Mixing apparatus for cooking vessels - Google Patents
Mixing apparatus for cooking vessels Download PDFInfo
- 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
Links
Images
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.
Abstract
Description
- 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 according to above 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.
- For this purpose, 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.
- According to an advantageous embodiment of the invention, 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. By this design of the channels of the wings, the wings can be formed by extrudable profiles.
- The invention will now be described hereinafter with reference to an embodiment shown on the enclosed drawings, in which
- Fig. 1
- shows a mixing apparatus according to the invention at a cooking vessel in view from the side,
- Fig. 2
- shows on an enlarged scale, in a broken lateral view, the attachment of a wing which is a part of the mixing apparatus in Fig. 1,
- Fig. 3
- shows correspondingly as in Fig. 2, the attachment of the wing, but from another optic angle,
- Fig. 4
- shows the attachment in Fig. 2 and 3 in view from above, and
- Fig. 5
- is an end view of an agitator wing.
- Fig 1 schematically shows a
cooking vessel 10 with its cylindricinner wall 11. Amixing 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 alower agitator rotor attachment agitator wings 17. Because of simplicity, Fig. 1 only shows twowings 17 on each rotor. - The
attachment 16 of thelower agitator rotor 14 is mounted upon aninner shaft 18 which is driven in one direction by the drive unit. Theattachment 15 of theupper agitator rotor 13 is mounted on an outertubular shaft 19 which surrounds theshaft 18 and is driven in the opposite direction by the drive unit. A locking means 20 is used for locking theinner shaft 18 axially with respect to theouter shaft 19. - Fig. 2 shows the
lower attachment 16 which is provided with three pairs of substantially radially pointingrods rods 22 has a slightly larger cross section than theother 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 withchannels channel 24 is slightly wider than thechannel 23. Since each pair of rods that carry one respective wing has different diameter with one another, and thechannels wings 17 upon theattachments channel 23 runs from the rear edge of the wing to a distance in parallel with the plane of the wing. Theother channel 24 runs in parallel with thechannel 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 ofrods - The
upper rotor 13 is designed in principally the same way as thelower rotor 14. However, therods shaft 18 as a consequence of that therotor 13 rotates in the opposite direction. - Mounting and dismounting of the wings onto respectively from the
attachments mixing apparatus 12 has been lifted from thevessel 10, thewings 17 can be pulled off the rods, in their longitudinal direction. The cleaning of thewings 17 is simple, since thechannels attachments rods - The
wings 17 are shaped with afrontal scraper edge 25 which in the lower position of the mixing apparatus makes it possible for therotor 14 to scrape against theinside 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. As an example, the
wings 17 andattachments double rotors
Claims (3)
- Mixing apparatus for mixing and stirring liquid or paste-like masses in a cylindric cooking vessel (12), comprising at least one vertical drive-shaft (18, 19) 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 (15, 16) for at least three agitator wings (17), said wings (17) being radially displaceable connected to each respective attachment (15, 16), so that the radially outer ends of the agitator wings during rotation elastically press against the inner surface of the vessel,
characterized in that the attachments (15, 16) comprise substantially radially pointing rods (21, 22), which are arranged in parallel pairs, and that the agitator wings (17) are provided with longitudinally running channels (23, 24) for receiving said rods. - Mixing apparatus according to claim 1,
characterized in that the channels (21, 22) 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. - Mixing apparatus according to claim 2,
characterized in that the wings (17) are formed by extrudable profiles.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9302061A SE511537C2 (en) | 1993-06-14 | 1993-06-14 | Mixer tools for cooking pots |
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 (en) |
AT (1) | ATE157558T1 (en) |
DE (1) | DE69405301T2 (en) |
DK (1) | DK0629435T3 (en) |
FI (1) | FI942787A (en) |
HU (1) | HU215286B (en) |
NO (1) | NO303813B1 (en) |
SE (1) | SE511537C2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106943001B (en) * | 2017-05-19 | 2018-12-11 | 盐城吉大智能终端产业研究院有限公司 | A kind of three spiral household soy milk machines |
CN110860233B (en) * | 2019-11-30 | 2021-11-09 | 重庆瑞霆塑胶有限公司 | Self-cleaning stirring device |
CN111938465B (en) * | 2020-09-03 | 2021-07-13 | 杭州富阳福士得食品有限公司 | Minced meat cutting device |
Family Cites Families (5)
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 |
-
1993
- 1993-06-14 SE SE9302061A patent/SE511537C2/en not_active IP Right Cessation
-
1994
- 1994-06-07 DE DE69405301T patent/DE69405301T2/en not_active Expired - Fee Related
- 1994-06-07 DK DK94850097.0T patent/DK0629435T3/en active
- 1994-06-07 EP EP94850097A patent/EP0629435B1/en not_active Expired - Lifetime
- 1994-06-07 AT AT94850097T patent/ATE157558T1/en not_active IP Right Cessation
- 1994-06-08 HU HU9401705A patent/HU215286B/en not_active IP Right Cessation
- 1994-06-10 NO NO942158A patent/NO303813B1/en unknown
- 1994-06-13 FI FI942787A patent/FI942787A/en unknown
Also Published As
Publication number | Publication date |
---|---|
SE511537C2 (en) | 1999-10-11 |
FI942787A (en) | 1994-12-15 |
HUT68682A (en) | 1995-07-28 |
DE69405301D1 (en) | 1997-10-09 |
HU9401705D0 (en) | 1994-09-28 |
NO942158L (en) | 1994-12-15 |
DE69405301T2 (en) | 1998-04-09 |
SE9302061D0 (en) | 1993-06-14 |
NO303813B1 (en) | 1998-09-07 |
HU215286B (en) | 1998-11-30 |
FI942787A0 (en) | 1994-06-13 |
SE9302061L (en) | 1994-12-15 |
EP0629435A1 (en) | 1994-12-21 |
NO942158D0 (en) | 1994-06-10 |
ATE157558T1 (en) | 1997-09-15 |
DK0629435T3 (en) | 1998-04-20 |
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