Electrical Food Preparation Device Comprising a Working Tool that Removably Engages on a Drive Mechanism

Patent metadata

Field	Value
Publication number	US-2016198902-A1
Application number	US-201414914702-A
Country	US
Kind code	A1
Filing date	Aug 21, 2014
Priority date	Aug 29, 2013
Publication date	Jul 14, 2016
Grant date	—

Abstract

An electrical food preparation device including a drive mechanism ( 3 ) rotated by a motor and a working tool ( 4, 5, 6, 7 ) including a bushing that removably engages on the drive mechanism, the drive mechanism including a section provided with at least one drive ramp that mates with a complementary drive ramp carried by said bushing in order to rotate said working tool, the drive ramp having an inclination designed such that the rotation of the drive mechanism in the direction of rotation of the motor generates a force on the bushing that tends to keep it engaged on the drive mechanism, the drive mechanism also including at least one retaining surface ( 33 ) that comes into contact with a stop carried by the working tool when the drive mechanism rotates in the reverse direction, the retaining surface and the stop having shapes that mate each other to prevent the bushing from rising back up along the drive mechanism when the motor stops suddenly, wherein the retaining surface is provided on a different part of the drive mechanism from the section supporting the drive ramp.

First claim

1 . Electrical food preparation device comprising a drive mechanism ( 3 ) rotated by a motor, and a working tool ( 4 , 5 , 6 , 7 ) comprising, a bushing ( 41 ) that engages removably on the drive mechanism ( 3 ), the drive mechanism ( 3 ) comprising a section (T) equipped with at least one drive ramp ( 32 A) that mates with a complementary drive ramp ( 44 A) carried by the bushing ( 41 ) to rotate the working tool ( 4 , 5 , 6 , 7 ), the drive ramp ( 32 A) having a slope that is designed such that the rotation of the drive mechanism ( 3 ) in the direction of rotation of the motor, exerts a force on the bushing ( 41 ) that tends to keep it engaged on the drive mechanism ( 3 ), the drive mechanism ( 3 ) also comprising at least one retaining surface ( 33 ) that comes into contact with a stop ( 45 ) carried by the working tool ( 4 , 5 , 6 , 7 ) when the drive mechanism ( 3 ) rotates in the reverse direction, the retaining surface ( 33 ) and the stop ( 45 ) having shapes that mate with one another to prevent the bushing ( 41 ) from rising up along the drive mechanism ( 3 ) when the motor is stopped suddenly, wherein the retaining surface ( 33 ) is arranged on a portion of the drive mechanism ( 3 ) that is separate from the section (T) supporting the drive ramp ( 32 A).

2 . Electrical food preparation device described in claim 1 , wherein the one or more retaining surface(s) ( 33 ) are arranged at a greater radial distance from the longitudinal axis of the drive mechanism ( 3 ) than the one or more drive ramp(s) ( 32 A).

3 . Electrical food preparation device described in claim 1 , wherein the retaining surface ( 33 ) extends parallel to the axis of the drive mechanism ( 3 ) or is sloped downward.

4 . Electrical food preparation device described in claim 1 , wherein the one or more retaining surface(s) ( 33 ) are carried by a disc ( 34 ) arranged at the base of the drive mechanism ( 3 ).

5 . Electrical food preparation device described in claim 4 , wherein the disc ( 34 ) has a larger diameter than the diameter of the drive mechanism ( 3 ) in the section (T) supporting the one or more drive ramp(s) ( 32 A).

6 . Electrical food preparation device described in claim 5 , wherein the one or more retaining surface(s) ( 33 ) extend roughly radially to the drive mechanism ( 3 ) and in that the disc ( 34 ) comprises, between two successive retaining surfaces ( 33 ), a peripheral edge extending in a spiral.

7 . Electrical food preparation device described in claim 1 , wherein the one or more drive ramp(s) ( 32 A) are in a spiral shape.

8 . Electrical food preparation device described in claim 1 , wherein the drive mechanism ( 3 ) comprises three drive ramps ( 32 A) spaced 120° apart from one another.

9 . Electrical food preparation device described in claim 1 , wherein the drive mechanism ( 3 ) comprises three retaining surfaces ( 33 ) spaced 120° apart from one another.

10 . Electrical food preparation device described in claim 1 , wherein the drive mechanism ( 3 ) is arranged in a bottom of a working container ( 2 ),

11 . Electrical food preparation device described in claim 10 , wherein the device comprises a safety mechanism that can suddenly stop the rotation of the drive mechanism ( 3 ).

12 . Electrical food preparation device described in claim 11 , wherein the working container is closed by a lid ( 8 ) and wherein the safety mechanism stops the motor upon opening the lid.

Assignees

• Seb Sa

Inventors

• Giraud Jean-Baptiste
• Beaudet Jean-Yves
• Nespoux Johan

Classifications

• A47J43/085

  for machines with tools driven from the lower side (A47J43/087, A47J43/09 take precedence) · CPC title

• A47J43/075 Primary

  Safety devices · CPC title

• A47J43/0716

  for machines with tools driven from the lower side (A47J43/0727 - A47J43/08 take precedence) · CPC title

• F16D1/112 Primary

  the interengaging parts comprising torque-transmitting surfaces, e.g. bayonet joints · CPC title

• F16D1/10

  Quick-acting couplings in which the parts are connected by simply bringing them together axially · CPC title