US 4,101,082 A · Electric motor-driven coffee mill

Abstract

An electric motor-driven coffee mill having a housing, a circular grinding cup obliquely arranged in the housing, a beater blade rotatably supported above the bottom of the cup, and below the bottom of the cup, a salient-pole motor with an asymmetrically arranged field coil having an inclined axis that the field coil extends on one side beyond the projection of the cup perpendicular to inclined plane of the oblique cup, and the contours of the motor lie inside a cylinder formed by the projection of the cup extending down vertically from the inclined plane of the oblique cup. Other features relate to the disposition of the motor in a plastic frame, a flat commutator and carbon brushes held by leaf springs, and double insulation around the shaft to shield it from its rotor. More efficient, economical coffee mills with greater electrical safety are thereby provided.

Claims12

Dependent claims

In an electric motor-driven coffee mill having a housing with a grinding cup disposed therein above the bottom of the housing, a drive motor in the housing disposed beneath the bottom of the grinding cup, and a rotatably supported comminuting tool disposed above the bottom of the grinding cup and driven by the drive motor, the improvement comprising said grinding cup being at least approximately circular and obliquely arranged in said housing, said drive motor being a salient-pole motor with an asymmetrically arranged field coil, the axis of said salient-pole motor being inclined such that the field coil extends on one side beyond a projection of the cup perpendicular to the oblique plane of the grinding cup, and the contours of said salient-pole motor lie inside a cylinder formed by a projection of the cup perpendicular to a horizontal plane.

Dependencies are inferred from the claim text.

Electric motor-driven coffee mill

Life of this patent

Electric motor-driven coffee mill

Life of this patent

Abstract

Claims12