Cutting – Tool or tool with support – Cutting couple type
Reexamination Certificate
2002-09-27
2004-08-03
Ashley, Boyer (Department: 3724)
Cutting
Tool or tool with support
Cutting couple type
C083S916000, C030S289000, C030S228000, C030S241000
Reexamination Certificate
active
06769341
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a cutting device, and more particularly to a sheet cutting device that can improve the safety of using the cutting device.
2. Description of Related Art
A conventional cutting device substantially comprises a knife and a driving device. The knife has multiple teeth formed on the periphery or one side of the knife. The driving device drives the knife to rotate or move in reciprocation so that the knife will provide a cutting effect to an object such as a metal sheet.
However, the area of contact between the sheet and the knife of the conventional cutting device is exposed waste metal generated during the cutting process will fly about and may injure the user. Thus, the user must always wear safety gear such as a safety coat, mask and so on for protection from the flying waste. However, in practice it is found that such gear is uncomfortable, as well as it being impossible to completely protect every part of an operator's body. Thus, the use of the conventional cutting device is not safe and is inconvenient.
In addition, the contact area between the sheet and the knife of the conventional is not supported, whereby shake or vibration easily occurs during the cutting process, leading to rough edges on the cut edge of the metal sheet. It is clear that the cutting quality of the conventional cutting device is poor.
To overcome the shortcomings, the present invention tends to provide a cutting device to mitigate or obviate the aforementioned problems.
SUMMARY OF THE INVENTION
The main objective of the invention is to provide a cutting device for a sheet material with improved safety in using the cutting device and elimination of excessive shake or vibration of the sheet. The cutting device has a body, a driving device, a moving base, a head and a cutting rod. The driving device is mounted on the body to actuate the base to move in reciprocation relative to the body. The head extends from the body and has a central hole defined through the head and corresponding to the moving base. A notch is defined in the bottom of the head and communicates with the central hole, and the notch extends to two opposite sides of the head so as to form a neck on a top of the head. An exhaust hole is defined in the bottom of the head and communicates with the central hole. The cutting rod is moveably received in the central hole in the head and is attached to the moving base. The cutting rod has a cutting recess defined around the cutting rod at a position corresponding to the notch in the head and selectively corresponding to the exhaust hole in the head while the cutting rod is actuated to move with the moving base by the driving device. The cutting recess has a cutting edge defined in the inner surface at one end far from the moving base. Accordingly, the metal waste generated during the cutting process will be stored in the head and will be exhausted from the exhaust hole in the head. This can keep the metal waste from flying about and injuring the user, so the safety of using the cutting device is improved.
REFERENCES:
patent: 2364334 (1944-12-01), Wold
patent: 2680292 (1954-06-01), Kaufmann
patent: 3025600 (1962-03-01), Leibinger
patent: 3212541 (1965-10-01), Burrows et al.
patent: 3847049 (1974-11-01), Bitzel
patent: 3861037 (1975-01-01), Smith et al.
patent: 3903772 (1975-09-01), Wickens
patent: 4312256 (1982-01-01), Herzog et al.
patent: 4748744 (1988-06-01), Turner
Ashley Boyer
Druan, Jr. Thomas J
Patta International Limited
Pelton, Esq. William E.
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