U.S. patent number 3,879,847 [Application Number 05/466,456] was granted by the patent office on 1975-04-29 for cutter with forwardly and rearwardly displaceable blade.
This patent grant is currently assigned to Smart AG. Invention is credited to Dieter Roll.
United States Patent |
3,879,847 |
Roll |
April 29, 1975 |
Cutter with forwardly and rearwardly displaceable blade
Abstract
A cutter with a forwardly and rearwardly displaceable blade
which is supported in a blade slide movable from the outside and
guided in the handle of the cutter and which blade slide can be
selectively arrested in different locking positions. The blade
slide which is of substantially trough-shape configuration and
receives the blade between two side edges or walls, is guided by
its side edges in grooves at the cutter handle. These grooves
extend up to the end of the cutter handle. The part of the blade
slide receiving the blade is outwardly movable to a location in
front of the cutter handle end for the purpose of changing the
blade.
Inventors: |
Roll; Dieter (Sedrun, Grisian,
CH) |
Assignee: |
Smart AG (Sedrun, Graubunden,
CH)
|
Family
ID: |
4313908 |
Appl.
No.: |
05/466,456 |
Filed: |
May 2, 1974 |
Foreign Application Priority Data
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|
|
|
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May 11, 1973 [CH] |
|
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6715/73 |
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Current U.S.
Class: |
30/162; 30/335;
30/320 |
Current CPC
Class: |
B26B
5/001 (20130101) |
Current International
Class: |
B26B
5/00 (20060101); B26b 001/08 () |
Field of
Search: |
;30/162,151,294,289,286,320,335,336,337,339,329 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Smith; Al Lawrence
Assistant Examiner: Zatarga; J. T.
Attorney, Agent or Firm: Kleeman; Werner W.
Claims
What is claimed is:
1. A cutter apparatus comprising a cutter handle, a blade slide
movably arranged in the cutter handle, means for initiating
movement of the blade slide from externally of the cutter handle, a
forwardly and rearwardly retractable blade supported at the blade
slide, said blade slide possessing a substantially trough-shaped
configuration including two side edges for reciving the blade
therebetween, said cutter handle being equipped with grooves
extending up to an end of the cutter handle from which protrudes
the blade, said blade slide being guided with said side edges in
said grooves of the cutter handle, said blade slide having a
portion receiving the blade, said blade receiving portion of the
blade slide being movable outwardly up to a location in front of
said end of the cutter handle for the purpose of exchanging the
blade, said blade slide being exchangeable for the purpose of being
able to use different width blades, said cutter handle being
provided with pairs of grooves of different mutual spacing from one
another, the grooves of each pair guiding the side edges of blade
slides of different width from one another.
Description
BACKGROUND OF THE INVENTION
The present invention relates to a new and improved construction of
cutter or knife implement with a blade which can be forwardly or
rearwardly displaced, the blade is supported in a blade slide
movable from the outside and guided in the cutter handle or grip,
and the blade slide can be selectively arrested or locked in
different locking positions.
Cutters or knife implements of this type are used by people, for
instance, in handcrafts for the most different work, and therefore
there are available on the market blades with very different shapes
of the cutting edge, which can possess a linear, curved or even
serrated construction. In order to be able to replace a blade for a
differently shaped blade or a dull blade for a new one, the blades
of such cutters must be easily exchangeable. During non-use of the
cutter, the blade must be completely retractable into the cutter
handle or grip in order to eliminate any possibility of injury.
According to a known construction of cutter of this type, the
cutter handle composed of two halves must be threadably
disconnected for the purpose of replacing the blade, requiring a
great deal of time and further requiring the constant availability
of a screwdriver or other suitable tool. This circumstance can
therefore impede a rational and economical use of such cutter.
SUMMARY OF THE INVENTION
Hence, it is a primary object of the present invention to provide
an improved cutter rendering possible a rapid removal or exchange
of the blade without having to dismantle the cutter handle.
Another object of the invention aims at the provision of a new and
improved construction of cutter by means of which it is possible to
also use blades or knives of different width, so that there is not
required the necessity of procuring a new set of cutters if there
are to be used for special work blades having different widths.
Now in order to implement these and still further objects of the
invention, which will become more readily apparent as the
description proceeds, the cutter of the previously mentioned type,
as contemplated by the invention, is manifested by the features
that the blade slide, which is substantially trough-shaped, and
receiving the blade between two side edges or walls thereof, is
guided by means of such side edges in grooves provided at the
cutter handle. These grooves extend up to an end of the cutter
handle. The part or portion of the blade slide which houses the
blade can be outwardly extended up to a location in front of the
cutter handle end for the purpose of exchanging the blade.
According to a preferred manifestation of the invention, the blade
slide is exchangeable for the purpose of being able to use blades
of different width, and at the cutter handle there are provided
pairs of grooves with different mutual spacing of the grooves of
each groove pair for guiding the side edges of different width
blade slides.
BRIEF DESCRIPTION OF THE DRAWING
The invention will be better understood and objects other than
those set forth above, will become apparent when consideration is
given to the following detailed description thereof. Such
description makes reference to the annexed drawing wherein:
FIG. 1 is a side view of a cutter designed according to the
invention with the blade slide pushed out or extended for purposes
of exchanging the blade;
FIG. 2 illustrates the cutter in its position of use wherein the
blade slide is retracted into the cutter handle or grip; and
FIG. 3 is a view of the front end of the cutter handle or grip.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Describing now the drawing, the cutter or knife implement depicted
in FIGS. 1-3 will be understood to comprise a cutter handle or grip
1 composed of two handle halves or handle portions 1a and 1b (FIG.
3) detachably assembled together by means of screws 2 and 3 or
equivalent fastening expedients. Between both handle halves 1a and
1b a guide slot 4 extends along the central lengthwise extending
portion of the cutter handle 1. The guide slot 4 is widened at its
lengthwise extending edges in that at such lengthwise extending
edges there are formed grooves 5 at the cutter handle portion 1a of
the cutter handle 1, as best seen by referring to FIG. 3. The
parting or separation plane 6 between both of the cutter handle
halves or portions 1a and 1b of the cutter handle 1 extends through
the guide slot 4 and is flush with its lower surface.
In the guide slot 4 there is displaceably guided for to-and-fro
movement a blade or knife slide 7 which, as best seen by referring
to FIG. 1, possesses a substantially trough-shaped construction
through the provision of two side edges or walls 8 and 9, in order
to thus receive the blade or knife 10 between such side edges. Both
of the side edges 8 and 9 are guided in the grooves 5 of the cutter
handle 1. These grooves, according to the showing of FIG. 1, extend
up to the front end of the cutter handle, so that the blade slide
7, even in the position where it is forwardly extended or ejected
for the purpose of exchanging the blade, is at least guided by
means of the one side edge or wall 8 in the associated groove 5.
The rear portion or part 11 of the blade slide 7 forms a narrower
tongue member which is resilient and upwardly flexed or bent at its
end, as indicated by reference character 12, extending by means of
such flexed portion 12 forwardly through a slot 13 provided at the
cutter handle portion 1a and at that location is again flexed into
a key or actuation tab 14. With the aid of this key or tab 14 the
blade slide 7 can be forwardly and rearwardly shifted within the
cutter handle 1 and locked or engaged at different positions,
wherein not further illustrated projections at the part 11 of the
blade slide releasably engage with recesses 15 at the cutter handle
1.
In order to be able to use blades of different width with the same
cutter, the blade slide 7 illustrated in the drawing must be
exchangeable for a narrower blade slide which has not been
particularly shown, but is similar in construction to the
illustrated blade slide. For this purpose there are provided at the
cutter handle portion 1a two further grooves 20 possessing a
smaller mutual spacing from one another and intended to guide a
narrower blade slide.
While there is shown and described present preferred embodiments of
the invention, it is to be distinctly understood that the invention
is not limited thereto, but may be otherwise variously embodied and
practiced within the scope of the following claims.
Accordingly,
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