Cutter

Details Cutter Cutter

2000-10-19

2002-10-08

Peterson, Kenneth E. (Department: 3724)

Cutlery

Cutting tools

With guard and/or guide

C030S319000, C030S320000, C030S321000

Reexamination Certificate

active

06460254

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a cutter installed with a rotary blade, in particular a cutter with a safety device.
2. Conventional Art
A cutter comprises, as shown in
FIG. 15
, an arm
51
installed rotatably with a circular cutter (hereinafter referred to as “rotary blade”) and a handle
52
, and is structured as it cuts an edge of things to be cut in a desired shape by running a rotary blade
53
on a cutting surface
54
of the thing to be cut in an arrow A direction of
FIG. 15
while pushing the rotary blade
53
. When cutting things to be cut with a cutter
55
, it is easy to move the rotary blade
53
straight by keeping an angle of the cutter
55
, that is, an angle formed between the arm
51
and the cutting surface
54
(&thgr; of
FIG. 15
) as 45 degrees, and it has been known that the cutting becomes easier as smaller the angle (&thgr; of
FIG. 15
) formed between the arm
51
and the cutting surface
54
as possible, that is, by laying the arm
51
the rotary blade
53
turns at a smaller turning radius for cutting.
However, in a conventional cutter
55
, since the arm
51
is provided fixedly on the handle
52
or integrally with it, and for instance, where a thing to be cut is cut straight, in order to move the rotary blade
53
straight, as shown in
FIG. 15
, cutting work is carried out by holding the arm
51
at an angle 45 degrees to the cutting surface
54
, a worker in a sitting posture in particular have to bend his wrist or raise his elbow during a long time working for cutting, which was a burden for him. Further, the cutter
55
is provided generally with a guard
56
as a safety device for a cutter of the rotary blade
53
, which is structured in such a manner as the guard
56
is provided on one side of the rotary blade
53
to come out or to be retracted by sliding the guard
56
itself, or the rotary blade
53
itself moves to slide the cutter of the rotary blade
53
for protection, by which for a left-handed person it is difficult to watch a cutting portion because his eyesight is shut by the guard
56
to make the cutting work difficult.
The present invention has been made in the light of the above problem, and an object thereof is to provide a cutter in which an arm can be positioned and held at any desired angle to a handle, thereby regardless of a worker left- or right-handed a desired cutting can be carried out easily and safely.
In order to attain the above object, according to a first aspect of the present invention, in a cutter installed with a rotary blade, the cutter comprises an arm one end of which is pivoted on a handle and on other end of which the rotary blade is mounted and a guard provided movably forward and backward, wherein the arm can be positioned and held at any desired angle to the handle.
By constituting as such, since the angle of the arm can be set and held to the handle, it is easily carried out to cut the things to be cut, and since a guard for protecting a rotary blade is provided, it is easy to operate the cutter safely.
Further, according to a second aspect of the present invention, a rotary movement of the arm a guard of which is retracted is limited.
By this, the rotary movement of the arm where a tip end of a cutter of the rotary blade is projected is limited to enable a positioning operation of the arm can be carried out safely.


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patent: 5355588 (1994-10-01), Brandenburg, Jr. et al.
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patent: 5765289 (1998-06-01), Schulz et al.
patent: 5787779 (1998-08-01), Garuglieri
patent: 6094824 (2000-08-01), Takeshita
patent: 6282794 (2001-09-01), Cho et al.
patent: 90 03 291 (1990-07-01), None

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