Electric motor-driven coffee mill

Details Electric motor-driven coffee mill Electric motor-driven coffee mill

1977-05-02

1978-07-18

Lake, Roy

Solid material comminution or disintegration

Apparatus

Rotating comminuting surface

310 43, 310258, B02C 1824

Patent

active

041010825

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.

REFERENCES:
patent: 2822485 (1958-02-01), Braun et al.
patent: 2982483 (1961-05-01), Heinemans
patent: 3612414 (1971-10-01), Nevison et al.
patent: 3737988 (1973-06-01), Bednarski

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