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US 8,118,071 B2Granted
Pencil sharpener
OwnerCharles Sued, Aron Abramsoninventors
Life of this patent
Estimating the term…
Abstract
A pencil sharpener that facilitates the sharpening of pencils by any one or more of the following: preventing injury; automatically sharpening pencils without manual manipulation; providing status indicators during sharpening; and/or allowing varying degrees of sharpness to be selected.
Claims9
A method of automatically sharpening a pencil, comprising:
- providing a housing defining a bore adapted to receive the pencil for automatic sharpening;
- and
- automatically monitoring the housing proximate the bore to detect a portion of a person's body and stopping the sharpening operation to prevent injury if the portion of the person's body is detected.
A method of automatically sharpening a pencil, comprising:
- providing a housing defining a bore adapted to receive the pencil for automatic sharpening;
- and
- automatically monitoring the housing proximate the bore to detect a portion of a person's body as the portion begins to enter the bore and stopping the sharpening operation to prevent injury if the portion of the person's body is detected.
A method of automatically sharpening a pencil, comprising:
- providing a housing defining a bore adapted to receive the pencil for automatic sharpening;
- and
- automatically monitoring the housing around the bore to detect a portion of a person's body as the portion approaches the bore and stopping the sharpening operation to prevent injury if the portion of the person's body is detected.
Dependencies are inferred from the claim text.