Electrically operated hand mixer including an attachment
First Claim
1. An attachment for an electrically operated hand mixer having at least a first drive shaft adapted for detachable coupling with various processing tools, the first drive shaft including a first toothing, the attachment comprising:
- a bowl;
a lid closable on the bowl;
an output shaft with a free end and a lower end, the free end of the output shaft extending upwardly through the lid and adapted to be non-rotatably coupled with the first drive shaft of the hand mixer when the hand mixer is placed on the lid, the output shaft providing a matching second toothing which mates with the first toothing on the first drive shaft, and the non-rotatable coupling being established by engagement of the first toothing provided on the first drive shaft of the hand mixer with the matching second toothing provided on the free end of the output shaft;
a spring coupled between the output shaft and the lid, wherein the output shaft is axially displaceable into the lid in opposition to the force of the spring during coupling action of the hand mixer and the attachment;
a blade assembly in the bowl for chopping foods; and
a second shaft rotatably coupled to the output shaft so that rotation of the output shaft causes the second shaft to rotate, the second shaft including a coupling which transfers rotation of the second shaft to the blade assembly.
2 Assignments
0 Petitions
Accused Products
Abstract
In an electrically operated hand mixer (10) including an attachment (1), the latter is provided with a bowl (2) closable by a lid (9). The hand mixer has at least two first (90) and second (77) drive shafts adapted for detachable coupling with various processing tools (76), such as whisk attachments or kneading blades. One of the drive shafts (90) can be non-rotatably coupled with an output shaft (16), extending upwardly through the lid (9), when the hand mixer (10) is placed on the lid (9) of the attachment (1). The output shaft (16) is connected with a drivable blade (21, 22) in the interior of the bowl (2) for chopping foods. The non-rotatable connection is established by engagement of a first toothing (71) provided in the drive shaft (90) and a mating second toothing (70) provided on the output shaft (16). The drive shaft and/or output shaft (90, 16), according to the present invention, is axially displaceable in opposition to the force of a spring (67) so that, during installation, the hand mixer (10) will move into abutment on the lid (9) even in the absence of an engagement between the first (71) and second (70) toothings. This permits ease of coupling of the hand mixer (10) to the attachment (1) because automatic coupling engagement of the drive and output shafts (90, 16) takes place as soon as the motor starts to operate.
15 Citations
10 Claims
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1. An attachment for an electrically operated hand mixer having at least a first drive shaft adapted for detachable coupling with various processing tools, the first drive shaft including a first toothing, the attachment comprising:
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a bowl; a lid closable on the bowl; an output shaft with a free end and a lower end, the free end of the output shaft extending upwardly through the lid and adapted to be non-rotatably coupled with the first drive shaft of the hand mixer when the hand mixer is placed on the lid, the output shaft providing a matching second toothing which mates with the first toothing on the first drive shaft, and the non-rotatable coupling being established by engagement of the first toothing provided on the first drive shaft of the hand mixer with the matching second toothing provided on the free end of the output shaft; a spring coupled between the output shaft and the lid, wherein the output shaft is axially displaceable into the lid in opposition to the force of the spring during coupling action of the hand mixer and the attachment; a blade assembly in the bowl for chopping foods; and a second shaft rotatably coupled to the output shaft so that rotation of the output shaft causes the second shaft to rotate, the second shaft including a coupling which transfers rotation of the second shaft to the blade assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification