Woodworking – Special-work machine – Pencil sharpening
Reexamination Certificate
2000-04-18
2001-05-29
Rada, Rinaldi I. (Department: 3724)
Woodworking
Special-work machine
Pencil sharpening
C030S457000, C030S122000
Reexamination Certificate
active
06237656
ABSTRACT:
CROSS-REFERENCE OF RELATED APPLICATIONS
Not applicable
BACKGROUND
1. Field of Invention
The present invention relates to pencil sharpeners, and more particularly, to a pencil sharpener for use with portable electric drills.
BACKGROUND
2. Description of Prior Art
Prior pencil sharpeners include various devices that sharpen wood/composite pencils and also house the pencil shavings and chipped lead or graphite for later disposal. Prior pencil sharpeners also include housings for the sharpened points of pencils. However, prior portable pencil sharpeners are dependent upon manual manipulation to create the sharpened int. Small, battery powered units are too bulky to be carried on the body of the user and are not convenient to use. Pencils sharpened by manual methods, such as a knife, do not easily produce finely shaped tapered points.
Accordingly, there is a need for a pencil sharpener that can be powered by an external source such as a portable electric drill and quickly produce a sharply defined point. In addition, there is a need for a highly portable pencil sharpener. Further, there is a need for a device as described above that is easily and economically produced.
U.S. Pat. No. 329,486 issued to Price on Nov. 3, 1885 describes a pencil sharpener which includes a dust chamber that reduces the noise generated by the sharpening process, by enclosing the outside of the cutter-holder and pencil guide. This pencil sharpener does not provide a means for insertion in a portable electric drill. This device also does not include a cover for the discharge outlet, thus permitting the discharge of pencil shavings and potential contact between the user and the cutting blades.
U.S. Pat. No. 661,955 issued to Cranstone on Nov. 20, 1900 describes a combination pencil point protector and sharpener. This device does not include a means for insertion in a portable electric drill or a cover that collects discharged pencil shavings and protects the user from accidental contact between the user and cutting blades.
U.S. Pat. No. 703,967 issued to O'Byrne on Aug. 21, 1902 describes a wood pencil sharpener which is constructed to cut the wood of the pencil with the grain, to avoid the breaking or splitting of the wood. This device does not include a means for insertion in a portable electric drill or a cover that collects discharged pencil shavings and protects the user from accidental contact between the user and cutting blades.
U.S. Pat. No. 879,998 issued to Augir on Feb. 25, 1908 describes a novelty device adapted for use as a pencil sharpener having an anterior chamber adapted to receive pencil shavings and dust produced by sharpening a pencil. This device does not include a means for insertion in a portable electric drill or a cover that collects discharged pencil shavings and protects the user from accidental contact between the user and cutting blades.
U.S. Pat. No. 1,780,371 issued to Benczalski on Nov. 4, 1930 describes another pencil sharpener. This sharpener device is covered by a removable casing; however this device lacks a means for insertion in a portable electric drill.
U.S. Pat. No. 4,485,862 issued to Mattheis et al. on Dec. 4, 1984 describes a pencil sharpener adapted to sharpen a plurality of different sizes and to a method for making such a device. This device does not include a means for insertion in a portable electric drill or a cover that collects discharged pencil shavings and protects the user from accidental contact between the user and cutting blades.
U.S. Pat. No. 5,367,777 issued to Nguyen et al. on Nov. 29, 1994 describes a wooden pencil sharpener and pocket holder which allows a pencil to be stored in a shirt pocket such that the pencil sharpener and pencil point are contained within a tube and covered sharpener. The pencil is held in a tubular member. This device does not include a means for insertion in a portable electric drill.
U.S. Pat. No. 4,736,658 issued to Jore on Apr. 12, 1988 illustrates a screw holding device. This device illustrates a hexagonal end used for insertion in a portable electric drill.
None of the above noted inventions and patents, taken singly or in combination, is seen to describe the instant invention as claimed.
SUMMARY OF THE INVENTION
By the present invention, a device that includes a pencil sharpener with cover suitable for insertion into the chuck of a portable electric drill is disclosed.
OBJECTS AND ADVANTAGES
Accordingly, it is a principle objective of the present invention to provide a highly portable method for sharpening pencils at a work site when used in conjunction with a portable electric powered drill.
Another of the objects of the present invention is to proved a portable pencil sharpener which effectively prevents accidental contact between the user and the point cutting blade of the pencil sharpener while in use or stored waiting to be used.
Yet another of the objects of the present invention is to provide a portable pencil sharpener that may be used to hone a variety of tubular shapes requiring sharpened points, such as crayons and the like.
Still another of the objects of the present invention is to provide a portable pencil sharpener which can be used with existing bit holding attachments capable of receiving a hexagonal fitting.
An object of the present invention is to provide a portable pencil sharpener which is economical to produce.
It is an object of the invention to provide improved elements and arrangements thereof in an apparatus for the purposes described which is inexpensive, dependable and fully effective in accomplishing its intended purposes.
These and other objects of the present invention will be more readily apparent as the nature of the invention is hereinafter more fully described, illustrated and claimed with reference being made to the attached drawings.
REFERENCES:
patent: 510518 (1893-12-01), Price
patent: 762754 (1904-06-01), Perkins
patent: 2366928 (1945-01-01), Paschell
patent: 2470387 (1949-05-01), Baggett
patent: 3049096 (1962-08-01), Hampton
patent: 4598478 (1986-07-01), Buschle
patent: 5647138 (1997-07-01), Tang et al.
Henry Douglas M.
Whitehead Dale
Flores-Saánchez Omar
Rada Rinaldi I.
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