Cutlery – Cutting tools – With material receiving opening
Reexamination Certificate
2001-08-10
2003-09-30
Payer, Hwei-Siu (Department: 3724)
Cutlery
Cutting tools
With material receiving opening
C030S125000, C030S294000, C030S456000
Reexamination Certificate
active
06625889
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to hand tools, and more particularly to a device for trimming and deburring the edges of objects made from any number of materials.
2. Description of the Prior Art
When cutting or otherwise forming an edge in an object made from materials such as plastic, wood, and metal, a rough edge or burr may be left behind. A number of current tools are commonly found for deburring such edges, including files, open blade skill knives, sandpaper, and a plurality of hook-tipped tools. However, these devices are time-consuming to use, inconsistent in their cutting depth and angle, and even potentially dangerous to the user.
Other, more sophisticated devices, have been created to make the task of deburring quicker, more accurate, and safer. An example of one such device is that described by U.S. Pat. No. 3,644,933. The device is generally comprised of an elongated semi-cylindrical guide having a longitudinal V-shaped groove that extends the length of the guide. A transverse groove is formed in the opposite side of the guide and is adapted to receive a cutting blade that protrudes through a small opening into the longitudinal groove. When the guide member is placed over a selected edge and moved in a longitudinal direction, the cutting blade engages the edge, removing an invariable amount thereof. One obvious shortcoming of such a device is that the cutting depth cannot be selectively adjusted to customize the amount of material to be removed from the object. Moreover, the device lacks convenience in that it can only safely hold the blade that is placed in the cutting position. Replacement blades must be carried separately, where they can be easily lost or become a potential safety hazard.
Accordingly, what is needed is an improved design for a deburring tool that allows the user to quickly, efficiently, and safely trim the edges or burrs from a selected object at variable depths.
SUMMARY OF THE INVENTION
The deburring device of the present invention is comprised of an elongated generally rectangular body having a longitudinal, V-shaped channel formed in the upper surface of the body, extending between the opposite ends thereof. A generally conical opening is formed in the bottom surface of the body and extends upwardly therethrough, so that it is in open communication with the V-shaped channel in the upper surface of the body. A diagonally-disposed blade is placed in slidable contact within the body. An adjustment screw is provided at one end of the body adjacent to the rearward end of the blade. The tip of the adjustment screw is operatively engaged with the blade so that, as the adjustment screw is moved longitudinally, the blade is selectively advanced or retracted through the opening and into the V-shaped channel.
In operation, the V-shaped channel is placed against the edge of the object to be trimmed after the cutting depth of the blade has been selected. The body is then longitudinally advanced by the user so that the blade engages the edge of the object and selectively removes a portion thereof. As the edge pieces are removed, they collect within the cylindrical opening until the lower surface of the body is turned downwardly, thus allowing the edge pieces to exit the body through the lower end of the conical opening.
Longitudinally disposed compartments are placed in the end of the body opposite the adjustment screw. Each compartment is sized to hold a plurality of replacement blades within the body for future use. Plugs are placed in the open ends of the compartments to safely retain the replacement blades.
Accordingly, it is one of the important objects of the present invention to provide an improved deburring tool for quickly and safely trimming the edges of objects made from any number of materials.
Another important object of the invention is to provide an improved deburring tool that is capable of simple depth adjustment of its cutting edge, without sacrificing cutting accuracy.
An additional object of the invention is to provide an improved deburring tool capable of fully retracting its cutting edge within the body of the tool.
A further object of the invention is to provide a deburring tool capable of safely and conveniently storing a plurality of replacement blades.
It is another object of this invention to provide a tool for trimming the edges of articles of manufacture that is of economic construction and simple operation.
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Niebergall Shane M.
Payer Hwei-Siu
Thomte Mazour & Niebergall
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