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US 4,918,816 AGranted
Pencil sharpener
OwnerAnthony J. Alphainventor
Life of this patent
Estimating the term…
Abstract
The present invention relates to a pencil sharpener designed to be used in sharpening pencils having an elongated cross section such as, for example, elliptical or rectangular. The sharpener includes four cutters which are disposed in the casing thereof in facing pairs with one pair of blades being perpendicular to the other pair. Gearing is provided to allow all of the blades to rotate simultaneously and at the same speed.
Claims10
An improved pencil sharpener having a sharpener mechanism comprising:
- (a) an actuator shaft bearingly supported by support structure;
- (b) force transmission means associated with said shaft for transmitting rotations of said shaft;
- (c) a first pair of opposed cutters drivingly connected with said shaft via said force transmission means;
- (d) a second pair of opposed cutters drivingly connected with said shaft via said force transmission means;
- (e) each said cutter having a cutting surface extending completely circumferentially thereabout;
- and
- (f) said cutters comprising cutting means configured for sharpening a pencil of elongated cross-section.
4 more elements
An improved pencil sharpener having a sharpener mechanism comprising:
- (a) an actuator shaft bearingly supported by support structure;
- (b) force transmission means associated with said shaft for transmitting rotations of said shaft;
- (c) a first pair of opposed cutters drivingly connected with said shaft via said force transmission means;
- (d) a second pair of opposed cutters drivingly connected with said shaft via said force transmission means;
- (e) each said cutter (1) having a cutting surface extending completely circumferentially thereabout, and (2) including a first cutter member and a second cutter member, said cutter members being mounted together to provide an alternating cutter configuration for each cutter;
- and
- (f) said cutters being configured to sharpen a pencil of elongated cross-section.
4 more elements
An improved pencil sharpener having a sharpener mechanism comprising:
- (a) an actuator shaft bearingly supported by support structure;
- (b) force transmission means associated with said shaft for transmitting rotations of said shaft;
- (c) a first pair of opposed cutters comprising a first cutter and a second cutter drivingly connected with said shaft via said force transmission means;
- (d) a second pair of opposed cutters comprising a third cutter and a fourth cutter drivingly connected with said shaft via said force transmission means;
- (e) said first and third cutters being enmeshed in a first gear train and said second and fourth cutters being enmeshed in a second gear train;
- (f) each said cutter having a cutting surface extending completely circumferentially thereabout;
- and
- (g) said cutters being configured to sharpen a pencil of elongated cross-section.
5 more elements
Dependencies are inferred from the claim text.