KNIFE, HATCHET AND HAMMER COMBINATION TOOL

OUTIL COUTEAU ET MARTEAU COMBINES

English Abstract

The knife (3; 4), in
particular the so-called survival knife,
is made into a multi-purpose tool by
arranging the blade portion (3) of the knife
(3; 4) to receive a wedged portion (1),
provided e.g. with a hammer head (10),
which forms a hatchet (1; 2) together with
the cutting edge (2) of the blade portion
(3). The blade portion (3) incorporates
e.g. an oblong aperture (7), whereto
the wedged portion (1) is locked with a
fastener (5), in this case with a flat plate
locking pin (5, 13). The locking pin (5; 13)
also includes a spring pin (13), to ensure
quick locking. The wedged portion (1) has
in this case an integral deep groove-like
fastener, adapted to be mounted on the
back section (6) of the blade portion (3).
The wedged portion (1) detached from the
blade portion (3) is kept e.g. locked in the
handle portion (4; 11) of the knife.

French Abstract

L'invention concerne un couteau (3, 4), en particulier un couteau de survie, constitué d'un outil à usages multiples comprenant une partie lame (3) de couteau destinée à recevoir une partie conique (1) pourvue d'une tête de marteau (10), et formant une hachette avec le bord de coupe de ladite partie lame (3). Cette partie (3) possède, par exemple, une ouverture oblongue (7) dans laquelle on verrouille la partie conique à l'aide d'un élément de fixation (5), notamment à l'aide d'une tige de verrouillage (5, 13). Ladite tige de verrouillage (5, 13) comprend également une tige à ressort (13) assurant un verrouillage rapide. La partie conique (1) comprend notamment un élément de fixation d'une seule pièce du type rainure profonde, conçu de façon à être monté sur la partie supérieure (6) de la partie lame (3). Ladite partie conique (1) détachée de la partie lame (3) est, par exemple, enfermée dans la partie manche (4, 11) du couteau.

Claims

6
CLAIMS
1. A multi-purpose tool comprising a knife including a
blade portion having a cutting edge CHARACTERIZED IN THAT
a wedge portion (1) is attached by a fastener to the
blade portion (3) of the knife (3;4) to form a hatchet
(1;2) with the cutting edge (2) of the blade portion (3).
2. The knife in accordance with the patent claim 1,
CHARACTERIZED IN THAT the wedge portion (1) is releasably
attached to the blade portion (3) of the knife (3;4) by
screw(s) (5).
3. The knife in accordance with the patent claim 1,
CHARACTERIZED IN THAT the blade portion (3) of the knife
(3: 4) has at least one hole (7) at which the wedge
portion (1) is attached to the blade portion (3) by
screw(s) (5).
4. The knife in accordance with the patent claim 1,
CHARACTERIZED IN THAT the blade portion (3) of the knife
(3,4) has a slot (8) into which the wedge portion (1) can
be locked by screw(s) (5).
5. The knife in accordance with the patent claim 1,
CHARACTERIZED IN THAT the cross-sectional shape of the
blade portion forms locking means for the wedge portion
(1), the wedge portion being shaped to conform to the
cross-sectional shape of blade portion (3).
6. The knife in accordance with any one of claims 1 to 5,
CHARACTERIZED IN THAT the wedge portion (1) is attached
to the blade portion (3) of the knife (3;4) with at least

7
part of the blade portion (3) being in a scabbard (14)
protecting the cutting edge (2) of the blade portion (3).
7. The knife in accordance with any one of claims 1 to 6,
CHARACTERIZED IN THAT the blade portion (3) of the knife
or an extension (11) thereof is adapted to be attached to
a military gun (16).
8. The knife in accordance with any one of claims 1 to 7,
CHARACTERIZED IN THAT the wedge portion (1) is provided
with a hammer head (10).
9. The knife in accordance with the patent claim 8,
CHARACTERIZED IN THAT the wedge portion (1) is adjustable
along the blade portion (3) to form the hatchet.

Description

CA 02402726 2002-09-27
WO 01/72481 PCT/F100/00268
Knife, hatchet and hammer combination tool.
The object of the invention herein disclosed is to provide a multi-
purpose combination tool wherein the basic body member is a knife
whose blade portion is formed to receive a further tool and the like.
The following disclosure of the invention primarily refers to big, so-
called survival knives.
Well-known examples of combination tools using knife portions are e.g.
multiple-use jackknives, or the knives incorporating various tools
such as fish scalers, bottle openers and a saw, at the back of their
blades.
Well-known as a military knife is the legendary wire-cutter
combination tool consisting of the cutting point of the back of the
knife blade with the counterpart of the metal point of the knife
scabbard: the knife works as the movable handle of the pliers
The insight idea of this invention is that in particular the so-called
survival knife can when needed be formed into a hatchet whereby a
wedged portion, for instance kept encased in the handle portion of the
knife, is mounted to the knife blade, thereby forming the hatchet
together with the cutting edge of the blade portion. This, for
instance, saves the woodsman and the like on long wanderings from
carrying along an often heavy and space-consuming axe.

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THE CHARACTERISTICS OF THE INVENTION ARE FEATURED IN THE ACCOMPANYING
PATENT CLAIMS.
The wedged portion is either one unit or consists of parts, and is
adjusted to be attached to the knife blade whereto to be immovably
locked.
The wedged portion can also incorporate other implements, such as the
hammer head, and have fastening holes for any further tool, a saw
blade for example.
The mounting of the wedged portion to the knife blade is best arranged
so that one or more of the respective surfaces to be set against the
blade portion are shaped to mate the shape thereof.
The mounting to the blade portion takes place from the side or top in
view of the cross section of the blade.
Mounting can also be arranged along the longitudinal axis of the
blade, either from the direction of the blade point (with the wedged
cross-section of the blade), or from the direction of the knife handle
(the knife handle is formed either wholly or partly by the wedged
portion.)
Since the cross-section of the knife blade just behind the blade point
is identical (also dimensionally), the changing of the position of the
wedged portion can easily be arranged along the longitudinal axis of
the blade.
The secured locking of the wedged portion to the knife blade is best
arranged by using either locking or fastening screws or pins or their
combinations. Respectively the knife blade portion includes for
example holes with or without threading, other apertures, recesses
such as the blood groove, or rails, for providing for the attachment
system of the wedged portion.
In particular in that embodiment of the invention where the wedged
portion is partly or wholly the knife handle (incorporating of course
the flat extension of the blade as the core), the lengthening of the
blood groove can be thought to extend either as a recess or a slot up
to the extension of the blade portion (to the handle of the knife), in
which case the slot can operate for instance as the guide to the
tightening-screw of the two-sided wedged portion being moved to the
blade.

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THE INVENTION AND ITS OTHER FEATURES AND ADVANTAGES ARE DESCRIBED IN
GREATER DETAIL IN THE FOLLOWING EXAMPLES AND ILLUSTRATED IN THE
ACCOMPANYING DRAWINGS.
Figure 1 shows in accordance with the invention the wedged portion as
locked to the knife blade
Figure 2 shows a slightly different embodiment of the invention.
Figure 3 shows in accordance with the invention the knife before being
altered into a combination tool.
Figure 4 shows the knife of Figure 3 altered into a combination tool.
Figure 5 shows the embodiment of the invention where in the knife-
position the wedged portion forms the whole handle (except for the
extension of the blade portion.)
Figure 6 in accordance with the invention shows the knife capable of
being attached to some extension handle by means of the wedged portion
detached from its handle.
Figure 7 shows another embodiment of the invention.
Figure 8 shows the cross-section of a blade differing from other knife
blades to be fit in with the wedged portion.
Figure 1 shows the wedged portion (1), the subject of the tool, as
adjusted against the one side and the back (6) of the blade portion
(3) (L-model). It forms together with the cutting edge (2) of the
blade portion (3) the hatchet (1;2), which is simple and light-weight.
Herein the locking takes place with the fastening screws (5) to the
threaded hole (7) in the blade portion (3).
Figure 2 shows such an embodiment of the invention, wherein the wedged
portion (1) locked on both sides of the blade portion (3) is adjusted
to be locked by being supported at its other end by the handle portion
(4) of the knife (3;4). Thereby the construction also well sustains
lateral torsion. The locking of the wedged portion is arranged here
with two locking screws (5) through the blade portion (3).

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4
Figure 3 shows in accordance with the invention the combination tool
in knife position. The wedged portion (1) is now part of the handle
(1;4;11). The wedged portion (1) also has a hammer head (10), which in
this case also works as the stopper when holding the knife (3;4).
The picture also shows the T-shaped extension of the flat plate back
(6) of the blade portion (3) starting from the end of the wedged
portion (1).
Visible in the blade portion (3) is also the blood groove (8), which
continues as a recess (9) in the extension (11) of the blade portion
(3). At the other end of the blood groove (8) herein is a hole (7).
The wedged portion (1) is locked to the extension (11) of the blade
portion (3) with two tightening screws (5) through the recess (9). The
wedged portion (1) could now also be considered to be encased in the
extension of the handle portion (4).
Figure 4 shows the same wedged portion (1) provided with the hammer
head (10) locked here to the blade portion (3) of the knife (3;4) with
fastening screws (5). The handle (4;11) of the hatchet (1;2) is herein
formed of the fixed part of the handle (4) and the extension (11) of
the blade portion (3).
The T-shaped cross section strengthening the handle (4,11) of the
extension (11) of the blade portion (3) is shown at the top (6) of the
extension (11) of the blade portion (3).
Also visible is the recessed extension (9) of the blood groove, along
which the wedged portion (1) has been moved to its exact position,
resting on the rear (5) (slackened) screw (the foremost screw (5) is
loosened). The front screw (5) could also in principle be working as
the tightening screw (5) being locked at the bottom of the blood
groove (8), whereby no hole would be needed at the other end of the
blood groove (8).
Figure 5 is the embodiment of the invention, whereby the wedged
portion (1) locked to the blade portion (3), prior to forming the
hatchet portion (1;2), has formed the whole handle portion (1;4;11)
together with the extension (11) of the blade portion (3). The picture
also shows the strengthened (T-shape) top edge (6) and the recess (9)
of the extension (11).

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Figure 6 shows the knife (3;11) of Figure 5 here with the handle
portion (1;4) detached and as cabable of being fastened to a military
rifle through the aperture (9) with some additional item (12).
Figure 7 has the wedged portion (1) fastened to the blade portion (3)
now with a quick-locking pin (14). The picture also shows how the
wedged portion (1) is adjusted to be kept on the extension (11) of the
blade portion (3) as a part of the knife (3;4) handle (1;4;11).
Locking is further provided with the same locking pin (5;13).
Figure 8 shows the blade portion (3) now thinner than the strongest
part of the cutting section. The wedged portion (1) (The locking can
be similar to that in Fig. 4) lies now as if protected behind the
"threshold" of the cutting section (2) of the blade portion (3).

Representative Drawing