EP0512172B1 - Improvements in and relating to food mixers - Google Patents

Improvements in and relating to food mixers Download PDF

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Publication number
EP0512172B1
EP0512172B1 EP91304224A EP91304224A EP0512172B1 EP 0512172 B1 EP0512172 B1 EP 0512172B1 EP 91304224 A EP91304224 A EP 91304224A EP 91304224 A EP91304224 A EP 91304224A EP 0512172 B1 EP0512172 B1 EP 0512172B1
Authority
EP
European Patent Office
Prior art keywords
bowl
guard assembly
mixer
food mixer
switch
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
EP91304224A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0512172A1 (en
Inventor
Stephen David Parkin
Charles Norman Kitchen
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.)
Premark FEG LLC
Original Assignee
WAVEBEST Ltd
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8208282&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0512172(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to ES91304224T priority Critical patent/ES2080249T3/es
Priority to AT91304224T priority patent/ATE128886T1/de
Priority to DE69113780T priority patent/DE69113780T2/de
Priority to EP91304224A priority patent/EP0512172B1/en
Priority to DK91304224.8T priority patent/DK0512172T3/da
Application filed by WAVEBEST Ltd filed Critical WAVEBEST Ltd
Publication of EP0512172A1 publication Critical patent/EP0512172A1/en
Publication of EP0512172B1 publication Critical patent/EP0512172B1/en
Application granted granted Critical
Priority to GR950403491T priority patent/GR3018363T3/el
Priority to HK98107010A priority patent/HK1007698A1/xx
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
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/60—Safety arrangements

Definitions

  • This invention relates to food mixers and more particularly to guards for preventing the operator of such mixers from entering the mixing zone thereof, especially when the mixer is in use.
  • Food mixers normally comprise a motor to which various mixing implements, for example whisks, beaters, blades and so on, may be attached.
  • the mixing implement extends into a bowl which is attached to and removable from the mixer.
  • Such mixers may be used for catering or other industrial mixing purposes and will hereafter be referred to as a "mixer of the type described".
  • a guard which fits around the top of the bowl. Indeed, in many countries it is a legal requirement that a guard is provided.
  • the guard may be solid or comprise a number of bars, spaced apart at such a distance that a hand may not be inserted between them.
  • the guard is pivotally connected to the mixer so that access to the bowl is permitted by swinging the guard upwardly or outwardly.
  • the guard is usually so arranged that, when it is swung away from the edge of the bowl, the motor is stopped to prevent rotation of the mixing implement.
  • European Patent Application No. 90401315.8 for example. However such a swinging movement of the guard takes up valuable space within the kitchen.
  • French Patent Application No. 2575142 discloses a food mixer having a two-part flat spiral guard assembly mounted to the bowl so that each part may rotate about a vertical axis.
  • a food mixer in accordance with the invention comprises a body, a bowl releasably mounted on the body, a motor for moving a food processing implement within the bowl and a guard assembly above the bowl comprising two parts, one of which is rotatable between at least two positions, a first closed position in which it prevents access to the bowl and a second, open, position about or within the second part in which it permits manual access to the bowl, characterised in that the second part is mounted to the body in a fixed position relative to the bowl and in that the two parts are complementary in shape, such that in the second, open, position one part is closely nested inside the other part.
  • the rotatable part of the guard assembly when open remains within the profile of the fixed part of the guard assembly which therefore does not require extra clearance when opened.
  • the rotatable and fixed parts of the guard assembly are both partially hemispherical in shape.
  • the guard assembly preferably has a portion formed with bars to allow an operator to see into the bowl and to add further ingredients whilst the mixing implement rotates.
  • the rotatable part of the guard assembly is preferably secured to the fixed part by means of a ring, or other fixing device.
  • the mixer preferably includes means for sensing movement of the rotatable part of the guard assembly relative the body operatively connected to or integral with means for preventing energisation of the motor when the rotatable part is not in the closed position.
  • This means preferably comprises a switch and an activator provided respectively on the body of the mixer and the rotatable part of the guard assembly.
  • the switch and the activator are preferably arranged to be directly opposite each other when the guard assembly is completely closed.
  • the switch is sensitive to the proximity of the activator and will therefore detect a relatively small movement of the rotatable part of the guard assembly. This arrangement ensures that the motor cannot be energised when the guard assembly is open or it has been removed for cleaning.
  • the rotatable part of the guard assembly is preferably not locked in place but rather is free to move at all times, so that should an object be inserted into the bowl and be caught by the mixing implement, any resulting slight movement imparted to the rotatable part of the guard will cause the switch to disconnect power to the motor.
  • a food mixer has a body 2, and a bowl 4 into which extends a mixing implement 6.
  • the upper end of the mixing implement engages with a bearing which is driven by a motor (not shown).
  • the bowl 4 is supported by arms 8 and may be removed by lowering the arms and then lifting the bowl, to disengage an engaging means 10 which co-operates with brackets 12 provided on the side of the bowl.
  • a guard assembly 14 is provided around the top of the bowl 4 to prevent access to the bowl.
  • the rear half 16 of the guard assembly is fixed relative to the front half 18, which in the embodiment illustrated is in the form of a 'cage' comprising a number of horizontal bars 20 spaced and supported by upright bars 22. This arrangement allows the operator to see into the bowl and to add further ingredients during mixing whilst preventing access to the mixing zone.
  • the fixed part 16 of the guard assembly is attached to a central housing 24 which may house gearing.
  • the outer perimeter of the housing is provided with a fixing device 26 by which the fixed part 16 of the guard assembly is mounted to the body 2 of the mixer.
  • a semi-circular gutter 28 is provided on the bottom edge of housing 24 in order to catch any fluid or the like which may fall from the housing.
  • the front half 18 of the guard assembly 14 is carried on a retaining ring 30 by means of the upright bars 22.
  • the retaining ring 30 is mounted in a slidable manner on the fixing device 26 of the housing 24, so allowing the front half 18 to rotate about the central axis X-X of the guard assembly and over the fixed part 16, to an open position in which the interior of the bowl 4 is accessible.
  • An activator 32 is attached to a region of the retaining ring 30 and a switch 34 is provided on the body 2 of the mixer.
  • the activator 32 and the switch 34 are so arranged that they are opposite one another when the guard assembly 14 is fully closed.
  • the switch 34 and activator 32 are such that when the activator 32 is opposite the switch 34, the switch 34 will be in a first of two states and when the activator 32 moves away from the switch 34, the switch 34 assumes the other state. Therefore, when the rotatable part 18 of the guard assembly 14 is moved from the closed position, either intentionally or by accident, the activator 32 will move away from the switch 34, so causing the switch 34 to change state, i.e. to trip.
  • the switch 34 is connected in such a way as to control the motor.
  • the switch 34 permits energisation of the motor and therefore the rotor, and hence mixing implement 6, is capable of operating in a normal manner.
  • the motor will be disenabled, so that the mixing implement 6 within the bowl cannot rotate.
  • the rotor will be enabled and the mixer may be used in the normal manner when the rotatable part is not in the closed position.
  • the housing 24 is provided with means, such as a bayonet attachment 36, for connecting the guard assembly 14 to the body of the mixer.
  • the guard assembly may be a standard fitting of the mixer or may be obtained separately and fitted to an existing machine. The guard assembly may be completely removed from the mixer, for example for cleaning. This will cause the switch to trip and render the mixer inoperable.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Food-Manufacturing Devices (AREA)
  • Meat, Egg Or Seafood Products (AREA)
EP91304224A 1991-05-10 1991-05-10 Improvements in and relating to food mixers Expired - Lifetime EP0512172B1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
AT91304224T ATE128886T1 (de) 1991-05-10 1991-05-10 Nahrungsmischer.
DE69113780T DE69113780T2 (de) 1991-05-10 1991-05-10 Nahrungsmischer.
EP91304224A EP0512172B1 (en) 1991-05-10 1991-05-10 Improvements in and relating to food mixers
DK91304224.8T DK0512172T3 (da) 1991-05-10 1991-05-10 Forbedringer ved og i relation til fødevarerøremaskiner
ES91304224T ES2080249T3 (es) 1991-05-10 1991-05-10 Perfeccionamientos en las mezcladoras para alimentos o relativos a las mismas.
GR950403491T GR3018363T3 (en) 1991-05-10 1995-12-12 Improvements in and relating to food mixers.
HK98107010A HK1007698A1 (en) 1991-05-10 1998-06-26 Improvements in and relating to food mixers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP91304224A EP0512172B1 (en) 1991-05-10 1991-05-10 Improvements in and relating to food mixers

Publications (2)

Publication Number Publication Date
EP0512172A1 EP0512172A1 (en) 1992-11-11
EP0512172B1 true EP0512172B1 (en) 1995-10-11

Family

ID=8208282

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91304224A Expired - Lifetime EP0512172B1 (en) 1991-05-10 1991-05-10 Improvements in and relating to food mixers

Country Status (7)

Country Link
EP (1) EP0512172B1 (es)
AT (1) ATE128886T1 (es)
DE (1) DE69113780T2 (es)
DK (1) DK0512172T3 (es)
ES (1) ES2080249T3 (es)
GR (1) GR3018363T3 (es)
HK (1) HK1007698A1 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140307518A1 (en) * 2008-07-30 2014-10-16 Vita-Mix Corporation Food processing machine

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5306083A (en) * 1993-08-04 1994-04-26 Premark Feg Corporation Mixer guard mounting means
DE9410628U1 (de) * 1994-07-01 1994-12-15 Nijs, Guido, Dipl.-Ing., 73252 Lenningen Abdeckhaube zur Abdeckung insbesondere von offenen Behältern
FR2740064B1 (fr) * 1995-10-24 1998-01-09 Robot Coupe Sa Dispositif de securite pour appareil batteur/melangeur
US7384187B2 (en) 2005-04-08 2008-06-10 Premark Feg L.L.C. Mixing machine and associated bowl guard system
US8308344B2 (en) 2008-01-24 2012-11-13 Premark Feg L.L.C. Mixing machine with associated bowl guard system
CN107223673A (zh) * 2017-08-01 2017-10-03 安徽华菱西厨装备股份有限公司 一种多功能自动控制搅拌和面机

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE294633C (es) *
US2867064A (en) * 1957-09-06 1959-01-06 Dan S Hermansson Splash guard for machine tools and like purposes
DE8409504U1 (de) * 1984-03-28 1987-05-21 HCR-Heinrich Cremer GmbH, 4050 Mönchengladbach Gehäuse zur Aufnahme einer Werkzeugmaschine
FR2575142A1 (fr) * 1984-12-21 1986-06-27 Loiselet Maurice Couvercle de protection pour cuve
FR2647030B1 (fr) * 1989-05-22 1992-02-14 Dito Sama Melangeur avec ecran mobile de protection

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140307518A1 (en) * 2008-07-30 2014-10-16 Vita-Mix Corporation Food processing machine
US9635981B2 (en) * 2008-07-30 2017-05-02 Vita-Mix Corporation Food processing machine

Also Published As

Publication number Publication date
DE69113780T2 (de) 1996-05-15
DK0512172T3 (da) 1996-02-19
HK1007698A1 (en) 1999-04-23
ES2080249T3 (es) 1996-02-01
ATE128886T1 (de) 1995-10-15
GR3018363T3 (en) 1996-03-31
DE69113780D1 (de) 1995-11-16
EP0512172A1 (en) 1992-11-11

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