Patent ID: 7338001
Filing Date: 2008-03-04
Classification: A47J

Abstract:
1. A household food processing appliance comprising: a motor housing containing a motor and a drive shaft; a working bowl having a bottom and a hollow sleeve that extends upwardly from said bottom; a lid for closing said bowl so that said bowl and said lid enclose a volume; and a rotatable processing tool that comprises a hub that extends along an axis and has a lower end, said hub forming a tube having an opening that extends along the axis from said lower end, said tube being fitted over said sleeve when said appliance is to be placed in operation, said processing tool comprising a lower drive element constructed to be coupled to said drive shaft to be rotated by said motor, wherein: said lid is constructed to be placed on said bowl in a manner that leads to a reduction in the volume enclosed between said bowl and said lid while maintaining a degree of fluid tightness; said hub has an outer wall provided with at least one vent; and said hub encloses a passage that is distinct from said lower drive element and that extends between said at least one vent and said opening in said hub to allow escape of air from the volume, through said passage, to a region outside of said bowl.