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US 4,054,164 AGranted
Pencil sharpener
AssigneeHitachi Chemical Company, Ltd.
InventorsRyoji Kose, Syoichi Saito, Masahito Ogiwara
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Abstract
A pencil sharpener of a rotary type including a rotary blade having spiral cutting edges and a blade holder, wherein the rotary blades makes a rotation around its own axis while making a revolution around a rotational axis of the assembly of the rotary blade and the blade holder by a cooperation of a pinion carried by the rotary blade and a fixed annular internal gear, wherein a cover means is provided to isolate the meshing region of the pinion and the annular internal gear from the shaving region effected by the spiral cutting edges.
Claims4
A pencil sharpener comprising:
- a frame;
- rotary blade including a cylindrical portion having spiral cutting edges and a pinion co-axially provided at one end of said cylindrical portion;
- a blade holder which rotatably supports said rotary blade and defines a conical cavity for receiving an end of a pencil therein;
- said blade holder being supported by said frame to be rotatable around the axis of said conical cavity;
- an annular internal gear fixedly supported by said frame and meshing with said pinion;
- a drive shaft which drives said blade holder around said axis;
- and
- a cover means supported by said blade holder to be rotatable therewith;
- said cover means traversing said blade holder and said rotary blade thereby isolating the meshing region of said pinion and said annular internal gear from said conical cavity.
6 more elements
Dependencies are inferred from the claim text.