TECHNICAL FIELD

Embodiments herein relate to a foodstuff processing appliance for processing foodstuff.

BACKGROUND

Foodstuff processing appliances for processing foodstuff such as fruits, juice, vegetables, ice, ice cream, sugar, coffee, grain, and dough, and so on usually comprises a foodstuff processing unit comprising a rotor adapted to process foodstuff. Such a rotor may for example comprise a slicer, a cutter, a blender, a juicer, a coffee mill, a whisk, a stirrer or a grinder. The rotor is usually driven by an electric motor. On today's consumer market, there is a need for foodstuff processing appliances comprising two separate foodstuff processing units adapted to process foodstuff in different manners. Examples of such foodstuff processing appliances are a combination of a juicer and blender, a combination of a coffee mill and a whisk, or a combination of a slicer and stirrer. By using such a foodstuff processing appliance, a user may perform different kind of foodstuff processing using a single foodstuff processing appliance. Also, such a foodstuff processing appliance requires less space than two corresponding foodstuff processing appliances. Further, today's consumer market demands high quality products which can be produced at a low cost.

There is an advantage, both in terms of quality impression of the foodstuff processing appliance and in terms of safety during use of the foodstuff processing appliance, if the respective foodstuff processing unit can be controlled individually, i.e. such that a foodstuff processing unit can be operated one at the time. A solution to achieve this is to use two separate electric motors each being arranged to drive a respective foodstuff processing unit. The use of two electric motors adds costs to a foodstuff processing appliance and requires more space than one electric motor. Accordingly, as shown above, there is an advantage if a single electric motor can be arranged to drive two separate foodstuff processing units individually. Also, since one foodstuff processing unit only needs to be driven at the time, such a single electric motor thus only needs to be dimensioned to drive one foodstuff processing unit at the time. The document US 3916776 A describes a foodstuff processing appliance comprising a juicer and a mixer each being driven by a single electric motor. The foodstuff processing appliance in the document US 3916776 A comprises a friction coupling comprising a knob via which a user may control the friction coupling such that the mixer can be manually disconnected from an electric motor drive shaft before use of the juicer. The solution shown in in the document US 3916776 A is associated with a number of drawbacks. Firstly, a friction coupling, as described in the document US 3916776 A, is subjected to considerable wear and tear and relies on friction. So, if the friction coupling is exposed to grease, liquid, or the like, it will not function properly. Secondly, the use of a knob puts a burden on a user since the user manually has to disconnect the mixer, and then, start the juicer via an electrical switch. Thirdly, in the solution proposed in the document US 3916776 A, a user may only disconnect the mixer when he or she wants to use the juicer. Thus, the juicer will rotate during mixing with the foodstuff processing appliance shown in the document US 3916776 A.

Accordingly, in view of the above, there is a need for an improved foodstuff processing appliance.

SUMMARY

An object of the present invention is to provide a foodstuff processing appliance that reduces or ameliorates at least one of the disadvantages of the prior art foodstuff processing appliances.

According to an aspect of the present disclosure, the object is achieved by a foodstuff processing appliance for processing foodstuff comprising a first foodstuff processing unit comprising a first rotor connection for connecting a first rotor adapted to process foodstuff, a second foodstuff processing unit comprising a second rotor connection for connecting a second rotor adapted to process foodstuff, and an electric motor comprising an electric motor drive shaft, wherein the foodstuff processing appliance comprises a first one-way clutch and a second one-way clutch, wherein the first one-way clutch is arranged to transfer rotational movement from the electric motor drive shaft to the first rotor connection upon rotational movement of the electric motor drive shaft in a first direction, and wherein the second one-way clutch is arranged to transfer rotational movement from the electric motor drive shaft to the second rotor connection upon rotational movement of the electric motor drive shaft in a second direction, being opposite to the first direction. Since the foodstuff processing appliance comprises a first one-way clutch and a second one-way clutch arranged in the above described manner, rotational movement will be transferred from the electric motor drive shaft to the first rotor connection upon rotational movement of the electric motor drive shaft in the first direction, and from the electric motor drive shaft to the second rotor connection upon rotational movement of the electric motor drive shaft in the second direction. Thereby, a simple arrangement is provided allowing rotational movement to be transferred to the respective first and second rotor connections one at the time simply by causing the electric motor to rotate the electric motor drive shaft in the first direction or in the second direction. Thus, by changing rotational direction of the electric motor drive shaft a user may select the rotor connection to which rotational movement will be transferred.

Accordingly, a foodstuff processing appliance is provided allowing the use of one electric motor and where rotational movement can be transferred to the respective first and second rotor connections one at the time simply by causing the electric motor to rotate the electric motor drive shaft in the first direction or in the second direction. Thus, a simple foodstuff processing appliance is provided which may be built using few components. Since a simple foodstuff processing appliance is provided the foodstuff processing appliance may be provided at a low cost. Further, since the foodstuff processing appliance comprises a first one-way clutch and a second one-way clutch arranged in the above described manner, rotational movement will not be transferred from the electric motor drive shaft to the second rotor connection upon rotational movement of the electric motor drive shaft in the first direction, and not transferred from the electric motor drive shaft to the first rotor connection upon rotational movement of the electric motor drive shaft in the second direction. As a result, safety during use of the foodstuff processing appliance is improved as well as a quality impression of the foodstuff processing appliance. Even further, since the foodstuff processing appliance comprises a first one-way clutch and a second one-way clutch arranged in the above described manner, a reliable foodstuff processing appliance is provided having high resistance to wear and tear. Thus, a foodstuff processing appliance is provided that reduces or ameliorates at least one of the disadvantages of the prior art foodstuff processing appliances. As a result, the above mentioned object is achieved.

Optionally, the electric motor drive shaft comprises a first electric motor drive shaft portion extending from a first side of the electric motor and a second electric motor drive shaft portion extending from a second side of the electric motor, wherein the first oneway clutch is arranged to transfer rotational movement from the first electric motor drive shaft portion to the first rotor connection and wherein the second one-way clutch is arranged to transfer rotational movement from the second electric motor drive shaft portion to the second rotor connection. The first foodstuff processing unit may be arranged at a location of the foodstuff processing appliance being different from the location of the second foodstuff processing unit. For example, the first foodstuff processing unit may be arranged at a higher location at the foodstuff processing appliance than the second foodstuff processing unit. Since the first electric motor drive shaft portion extends from the first side of the electric motor and the second electric motor drive shaft portion extends from the second side of the electric motor, a distance at which rotational movement has to be transferred from the electric motor drive shaft to respective first rotor connection and/or the second rotor connection may be reduced. Thus, a compact foodstuff processing appliance may be provided using few components further resulting in a reliable foodstuff processing appliance.

Optionally, the foodstuff processing appliance further comprises a belt transmission comprising a first pulley, a second pulley and a belt, wherein the belt transmission is arranged to transfer rotational movement from the electric motor drive shaft to the second rotor connection, wherein the second one-way clutch is integrated into the first pulley. Since the foodstuff processing appliance comprises a belt transmission, the second foodstuff processing unit, comprising the second rotor connection, may be arranged at a distance from the electric motor drive shaft. Further, a reliable and durable transmission is provided which can be provided at a low cost. A belt transmission is provided with a slight resistance to rotational movement due to friction forces, such as internal friction forces of the belt during bending of the belt occurring during rotation of the belt transmission. Since the foodstuff processing appliance further comprises a belt transmission arranged to transfer rotational movement from the electric motor drive shaft to the second rotor connection and since the second one-way clutch is integrated into the first pulley, the slight resistance to rotational movement of the belt transmission will prevent transfer of rotational movement from the electric motor drive shaft to the second rotor connection upon rotational movement of the electric motor drive shaft in the first direction.

As a result, safety during use of the foodstuff processing appliance is further improved as well as the quality impression of the foodstuff processing appliance. Thus, the belt transmission will transfer rotational movement from the electric motor drive shaft to the second rotor connection upon rotational movement of the electric motor drive shaft in the second direction and prevent transfer of rotational movement from the electric motor drive shaft to the second rotor connection upon rotational movement of the electric motor drive shaft in the first direction. As a result, a structurally simple arrangement is provided capable of performing these functions. Since the arrangement is structurally simple, it can be provided at a low cost and will be reliable.

Further, since the second one-way clutch is integrated into the first pulley of the belt transmission, less space is required since space of an already existing component is used for accommodating the second one-way clutch. Further, a compact arrangement for transferring rotational movement from the electric motor drive shaft to the second rotor connection is provided. Also, since the second one-way clutch is integrated into the first pulley, assembly of the foodstuff processing appliance is facilitated which may reduce manufacturing costs of the foodstuff processing appliance. Optionally, the foodstuff processing appliance further comprises a brake member and a transmission member, wherein the transmission member is arranged to co-rotate with the first rotor connection in a transmission member rotation axis, wherein the brake member is arranged to prevent transfer of rotational movement from the electric motor drive shaft to the first rotor connection upon rotational movement of the electric motor drive shaft in the second direction by preventing rotation of the transmission member in a third direction. Thereby, transfer of rotational movement from the electric motor drive shaft to the first rotor connection is prevented upon rotational movement of the electric motor drive shaft in the second direction in a simple manner. As a result, safety during use of the foodstuff processing appliance is further improved as well as the quality impression of the foodstuff processing appliance.

Optionally, the brake member is pivotally arranged to the foodstuff processing appliance in a pivot axle essentially parallel to the transmission member rotation axis, wherein the pivot axle is arranged at a distance from a surface of the transmission member, and wherein the brake member comprises an extension in a radial direction of the pivot axle being greater than the distance, and wherein the brake member is biased towards the surface. Since the brake member comprises an extension in a radial direction of the pivot axle being greater than the distance from the pivot axle to the surface of the transmission member, and since the brake member is biased towards the surface, the brake member will allow rotation of the transmission member in a fourth direction, being opposite to the third direction. During rotation of the transmission member in the third direction, friction forces between the brake member and the surface of the transmission member will pivot the brake member slightly towards the surface of the transmission member, resulting in an increase of friction forces between the brake member and the surface of the transmission member. Thus, the brake member will prevent rotation of the transmission member in the third direction.

During rotation of the transmission member in the fourth direction, being opposite to the third direction, friction forces between the brake member and the surface of the transmission member will pivot the brake member slightly from the surface of the transmission member, resulting in a decrease of the friction forces between the brake member and the surface of the transmission member. Thus, the brake member will allow rotation of the transmission member in the fourth direction. Accordingly, a simple brake member is provided preventing rotation of the transmission member in the third direction and allowing rotation of the transmission member in the fourth direction. Since the transmission member is arranged to co-rotate with the first rotor connection, a structurally simple brake member is provided preventing transfer of rotational movement from the electric motor drive shaft to the first rotor connection upon rotational movement of the electric motor drive shaft in the second direction, and allowing transfer of rotational movement from the electric motor drive shaft to the first rotor connection upon rotational movement of the electric motor drive shaft in the first direction. Since the brake member is structurally simple, the brake member can be provided at a low cost.

Further, since friction forces between the brake member and the surface of the transmission member will pivot the brake member slightly towards the surface of the transmission member during rotation of the transmission member in the third direction, resulting in an increase of the friction forces between the brake member and the surface of the transmission member, a reliable braking action is achieved. Since a reliable braking action is achieved, safety during use of the foodstuff processing appliance is further improved as well as the quality impression of the foodstuff processing appliance.

Optionally, the brake member is biased towards the surface in a biasing direction, wherein the extension, of the brake member, in a plane perpendicular to the pivot axle, increases along a circumference of the brake member in a direction opposite to the biasing direction. Since the extension of the brake member increases along the circumference of the brake member in a direction opposite to the biasing direction, friction forces between the brake member and the surface of the transmission member will increase gradually during rotation of the transmission member in the third direction and decrease gradually during rotation of the transmission member in the fourth direction. Thereby, a smoother braking action is achieved upon rotation of the transmission member in the third direction and a smoother transition to an allowed rotation of the transmission member in the fourth direction is achieved. Further, since the extension of the brake member increases along the circumference of the brake member in a direction opposite to the biasing direction, the brake member will be more resistant to wear and tear.

Optionally, the foodstuff processing appliance further comprises a switch arranged to control the electric motor, wherein the switch comprises a first mode and a second mode wherein the electric motor is arranged to rotate the electric motor drive shaft in the first direction, when the switch is in the first mode and arranged to rotate the electric motor drive shaft in the second direction, when the switch is in the second mode. Thereby, a user may select transfer of the rotational movement from the electric motor drive shaft to the first rotor connection or to the second rotor connection simply by switching the switch to the first mode or to the second mode.

Optionally, the first foodstuff processing unit comprises a juicer, and the second foodstuff processing unit comprises a blender.

BRIEF DESCRIPTION OF THE DRAWINGS

The various aspects of embodiments herein, including its particular features and advantages, will be readily understood from the following detailed description and the accompanying drawings, in which:

Fig. 1 illustrates a foodstuff processing appliance according to some embodiments.

Fig. 2 illustrates a brake member of the foodstuff processing appliance illustrated in Fig. 1 , in a braking position.

Fig. 3 illustrates the brake member illustrated in Fig. 2, in an un-braking position.

DETAILED DESCRIPTION

The embodiments herein will now be described more fully with reference to the accompanying drawings, in which example embodiments are shown. Disclosed features of example embodiments may be combined as readily understood by one of ordinary skill in the art. Like numbers refer to like elements throughout. Well-known functions or constructions will not necessarily be described in detail for brevity and/or clarity.

Fig. 1 illustrates a foodstuff processing appliance 1 for processing foodstuff. The foodstuff processing appliance 1 comprises a first foodstuff processing unit 2 comprising a first rotor connection 3 for connecting a first rotor 4 adapted to process foodstuff, and a second foodstuff processing unit 5 comprising a second rotor connection 6 for connecting a second rotor 7 adapted to process foodstuff. The foodstuff processing appliance 1 illustrated in Fig. 1 comprises a first foodstuff processing unit 2 comprising a juicer and a second foodstuff processing unit 5 comprising a blender. The first rotor 4 of the first foodstuff processing unit 2 comprises a juice centrifuge provided with a portion provided with sharp protrusions (not shown) arranged to tear fruits, vegetables or the like and a frusto-conical portion provided with a plurality of small holes (not shown) for extracting juice from the teared fruits, vegetables or the like. The second rotor 7 of the second foodstuff processing unit 5 comprises a mixer unit provided with blades for mixing constituents in the second foodstuff processing unit 5. The foodstuff processing appliance provided may comprise other types of foodstuff processing units and other combinations of foodstuff processing units than illustrated in Fig. 1 . The foodstuff processing appliance may for example comprise foodstuff processing units for processing foodstuff such as fruits, juice, vegetables, ice, ice cream, sugar, coffee, grain, dough etc. and may thus comprise rotor connections for connecting a rotor such as a slicer, a cutter, a blender, a juicer, a coffee mill, a whisk, a stirrer or a grinder.

The foodstuff processing appliance 1 comprises an electric motor 8 comprising an electric motor drive shaft 9.1 , 9.2. The electric motor 8 may comprise any type of electric motor capable of operating in two opposing rotational directions such as a high voltage DC electric motor (HVDC), a brushed DC electric motor (BDC), a brushless DC electric motor, a three-phase electric motor, a stepper electric motor, or an induction electric motor. The foodstuff processing appliance 1 comprises a first one-way clutch 1 1 and a second one-way clutch 13. The first one-way clutch 1 1 is arranged to transfer rotational movement from the electric motor drive shaft 9.1 to the first rotor connection 3 upon rotational movement of the electric motor drive shaft 9.1 , 9.2 in a first direction d1 and arranged to not transfer rotational movement from the electric motor drive shaft 9.1 to the first rotor connection 3 upon rotational movement of the electric motor drive shaft 9.1 , 9.2 in the second direction d2. The second one-way clutch 13 is arranged to transfer rotational movement from the electric motor drive shaft 9.2 to the second rotor connection 6 upon rotational movement of the electric motor drive shaft 9.1 , 9.2 in a second direction d2, being opposite to the first direction d1 , and arranged to not transfer rotational movement from the electric motor drive shaft 9.2 to the second rotor connection 6 upon rotational movement of the electric motor drive shaft 9.1 , 9.2 in the first direction d1 . Thereby, a foodstuff processing appliance 1 is provided allowing the use of one electric motor 8 and where rotational movement can be transferred to the respective first and second rotor connections 3, 6 one at the time simply by causing the electric motor 8 to rotate the electric motor drive shaft 9.1 , 9.2 in the first direction d1 or in the second direction d2.

The first one-way clutch 1 1 and/or the second one-way clutch 13 may for example comprise a roller clutch, a sprag clutch, and/or a drawn cup roller clutch.

As illustrated in Fig.1 , the electric motor drive shaft 9.1 , 9.2 may comprise a first electric motor drive shaft portion 9.1 extending from a first side 15 of the electric motor 8 and a second electric motor drive shaft portion 9.2 extending from a second side 17 of the electric motor 8. Further, as illustrated in Fig. 1 , the first one-way clutch 1 1 may be arranged to transfer rotational movement from the first electric motor drive shaft portion 9.1 to the first rotor connection 3 and the second one-way clutch 13 may be arranged to transfer rotational movement from the second electric motor drive shaft portion 9.2 to the second rotor connection 6.

The embodiments of the foodstuff processing appliance 1 illustrated in Fig. 1 comprises a first foodstuff processing unit 2 comprising a juicer and a second foodstuff processing unit 5 comprising a blender. As illustrated, the first foodstuff processing unit 2 may be arranged at a higher location at the foodstuff processing appliance 1 than the second foodstuff processing unit 5. Thereby, liquid from the first foodstuff processing unit 2 may flow from the first foodstuff processing unit 2 via a spout 18 into the second foodstuff processing unit 5. Since the electric motor drive shaft 9.1 , 9.2 comprises the first electric motor drive shaft portion 9.1 extending from the first side 15 of the electric motor 8 and the second electric motor drive shaft portion 9.2 extending from the second side 17 of the electric motor 8, the distance at which rotational movement has to be transferred from the electric motor drive shaft 9.1 , 9.2 to respective first rotor connection 3 and the second rotor connection 6 is reduced. Thus, a compact foodstuff processing appliance 1 is provided using few components. As illustrated in Fig. 1 , the foodstuff processing appliance 1 may comprise a belt transmission 19 comprising a first pulley 21 , a second pulley 23 and a belt 25, wherein the belt transmission 19 is arranged to transfer rotational movement from the electric motor drive shaft 9.2 to the second rotor connection 6, wherein the second one-way clutch 13 is integrated into the first pulley 21 .

The belt 25 may comprise of a flexible material arranged to transfer rotational movement from the electric motor drive shaft 9.2 to the second rotor connection 6. The belt 25 may comprise a V-belt, a poly V-belt, flexible poly-V belt or a timing belt. The belt

transmission 19 may further comprise a belt tightener (not shown).

Since the second one-way clutch 13 is integrated into the first pulley 21 of the belt transmission 19, the belt transmission 19 with the second one-way clutch 13 is arranged to transfer rotational movement from the electric motor drive shaft 9.2 to the second rotor connection 6 upon rotational movement of the electric motor drive shaft 9.2 in the second direction d2 and arranged to not transfer rotational movement from the electric motor drive shaft 9.2 to the second rotor connection 6 upon rotational movement of the electric motor drive shaft 9.2 in the first direction d1 . Even though the second one-way clutch 13 is arranged to not transfer rotational movement from the electric motor drive shaft 9.2 to the second rotor connection 6 upon rotational movement of the electric motor drive shaft 9.2 in the first direction d1 , internal friction within the second one-way clutch 13 may nevertheless cause some transfer of such rotational movement. However, the belt transmission 19 is provided with a slight resistance to rotational movement due to friction forces, such as internal friction forces of the belt 25 during bending of the belt 25 occurring during rotation of the belt transmission 19. As a result, the belt transmission 19 will prevent transfer of rotational movement from the electric motor drive shaft 9.2 to the second rotor connection 6 upon rotational movement of the electric motor drive shaft 9.2 in the first direction d1 . As illustrated in Fig. 1 , the foodstuff processing appliance 1 may comprise a brake member 27 and a transmission member 29. The transmission member 29 is arranged to co-rotate with the first rotor connection 3 in a transmission member rotation axis 31 . In the embodiments of the foodstuff processing appliance 1 shown in Fig. 1 , the

transmission member 29, as well as the first one-way clutch 1 1 and the first rotor connection 3 are each arranged to rotate around a rotation axis 32 of the electric motor drive shaft 9.1 , 9.2. Thus, in the embodiments of the foodstuff processing appliance 1 shown in Fig. 1 , the transmission member rotation axis 31 coincides with the rotation axis 32 of the electric motor drive shaft 9.1 , 9.2. However, the transmission member rotation axis 31 may not coincide with the rotation axis 32 of the electric motor drive shaft 9.1 , 9.2 in other embodiments of the foodstuff processing appliance 1 .

The brake member 27 is arranged to prevent transfer of rotational movement from the electric motor drive shaft 9.1 to the first rotor connection 3 upon rotational movement of the electric motor drive shaft 9.1 in the second direction d2 by preventing rotation of the transmission member 29 in a third direction d3. Even though the first one-way clutch 1 1 is arranged to not transfer rotational movement from the electric motor drive shaft 9.1 to the first rotor connection 3 upon rotational movement of the electric motor drive shaft 9.1 in the second direction d2, internal friction within the second one-way clutch 13 may nevertheless cause some torque transfer. However, since the foodstuff processing appliance 1 comprises the brake member 27, transfer of rotational movement from the electric motor drive shaft 9.1 to the first rotor connection 3 upon rotational movement of the electric motor drive shaft 9.1 in the second direction d2 will be prevented. Since the transmission member rotation axis 31 coincides with the rotation axis 32 of the electric motor drive shaft 9.1 , 9.2, in the embodiments illustrated in Fig. 1 , the third direction d3 coincides with the second direction d2.

Fig. 2 illustrates the brake member 27 and the transmission member 29 shown in Fig. 1 . The brake member 27 is pivotally arranged to the foodstuff processing appliance in a pivot axle 33 essentially parallel to the transmission member rotation axis 31 . The pivot axle 33 is arranged at a distance d from a surface s of the transmission member 29. The brake member 27 comprises an extension r2 in a radial direction of the pivot axle 33 being greater than the distance d from the pivot axle 33 to the surface s of the transmission member 29. The brake member 27 is biased towards the surface s, for example by a spring 36.

Upon rotation of the transmission member 29 in the third direction d3, friction forces between the brake member 27 and the surface s of the transmission member 29 will pivot the brake member 27 slightly towards the surface s of the transmission member 29, resulting in an increase of friction forces between the brake member 27 and the surface s of the transmission member 29. Thereby, the brake member 27 will prevent rotation of the transmission member 29 in the third direction d3. In Fig. 2, the brake member 27 is illustrated in a braking position in which the brake member 27 prevents rotation of the transmission member 29 in the third direction d3. As can be seen, the extension r2 of the brake member in a radial direction of the pivot axle 33 being greater than the distance d, ensures prevention of rotation of the transmission member 29 in the third direction d3

Upon rotation of the transmission member 29 in the fourth direction d4, being opposite to the third direction d3, friction forces between the brake member 27 and the surface s of the transmission member 29 will pivot the brake member 27 slightly from the surface s of the transmission member 29, resulting in a decrease of the friction forces between the brake member 27 and the surface s of the transmission member 29. Thus, the brake member 27 will allow rotation of the transmission member in the fourth direction. Fig. 2 illustrates the brake member 27 in an un-braking position in which the brake member 27 allows rotation of the transmission member in the fourth direction d4. As can be seen, the brake member 27 has extension r1 slightly smaller than the distance d from the pivot axle 33 to the surface s of the transmission member 29 ensuring allowance of rotation of the transmission member 29 in the fourth direction d4. Since the transmission member rotation axis 31 coincides with the rotation axis 32 of the electric motor drive shaft 9.1 , 9.2, in the embodiments illustrated in Fig. 1 , the fourth direction d4 coincides with the first direction d1 .

As illustrated in Fig. 2, as well as in Fig. 3, the brake member 27 may be biased towards the surface s in a biasing direction db for example by the spring 36, wherein the extension r1 , r2 of the brake member 27, in a plane perpendicular to the pivot axle 33, increases along a circumference c of the brake member 27 in a direction do opposite to the biasing direction db. Since the extension r1 , r2 of the brake member 27, in the plane perpendicular to the pivot axle 33, increases along the circumference c of the brake member 27 in the direction do opposite to the biasing direction db, friction forces between the brake member 27 and the surface s of the transmission member 29 will increase gradually during rotation of the transmission member in the third direction d3 and decrease gradually during rotation of the transmission member 29 in the fourth direction d4.

Thereby, a smoother braking action is achieved upon rotation of the transmission member 29 in the third direction d3 and a smoother transition to an allowed rotation of the transmission member 29 in the fourth direction d4 is achieved. Further, since the extension of the brake member 27 increases along the circumference c of the brake member 27 in a direction do opposite to the biasing direction db, the brake member 27 will be more resistant to wear and tear.

The brake member 27 may comprise a low friction material such as a low friction plastic such as Polyoxymethylene (POM), also known as acetal, polyacetal and

polyformaldehyde. In embodiments where the brake member 27 comprises a low friction material such as a low friction plastic such as Polyoxymethylene, the brake member 27 will be resistant to abrasion and will be provided with a self-lubricating effect. Further, a smoother braking action, as well as a smoother transition to an allowed rotation of the transmission member 29 may be achieved. Even further, the brake member 27 may produce less noise.

According to some embodiments, the foodstuff processing appliance further comprises a second brake member (not shown) and a second transmission member (not shown), wherein the second transmission member is arranged to co-rotate with the second rotor connection 6, wherein the second brake member is arranged to further prevent transfer of rotational movement from the electric motor drive shaft 9.2 to the second rotor connection 6 upon rotational movement of the electric motor drive shaft 9.1 , 9.2 in the first direction d1 by preventing rotation of the second transmission member in a fifth direction. Such a second brake member and such a second transmission member may be similar to the brake member 27 and the transmission member 29 as described with reference to Fig. 1 -3.

As shown in Fig. 1 , the foodstuff processing appliance 1 may further comprise a switch 35 arranged to control the electric motor 8, wherein the switch 35 comprises a first mode and a second mode wherein the electric motor 8 is arranged to rotate the electric motor drive shaft 9.1 , 9.2 in the first direction d1 , when the switch 35 is in the first mode, and arranged to rotate the electric motor drive shaft 9.1 , 9.2 in the second direction d2, when the switch 35 is in the second mode. Thereby, a user may select transfer of the rotational movement from the electric motor drive shaft 9.1 , 9.2 to the first rotor connection 3 or to the second rotor connection 6 simply by switching the switch 35 to the first mode or to the second mode. The switch 35 may comprise an electromechanical switch arranged to change the polarity of the electric motor 8. The switch 35 may further comprise a semiconductor circuitry such as an H-bridge and a bi-directional motor control circuitry.