U.S. patent number 3,774,498 [Application Number 05/142,610] was granted by the patent office on 1973-11-27 for charging device for automatic firearms.
This patent grant is currently assigned to Heckler & Koch GmbH. Invention is credited to Dieter Ketterer, Tilo Moller.
United States Patent |
3,774,498 |
Moller , et al. |
November 27, 1973 |
CHARGING DEVICE FOR AUTOMATIC FIREARMS
Abstract
Automatic firearms embody a charging or cocking device having a
casing part and a slider therein the rear part of which cooperates
with the breech and the forward end of which incorporates a
pivotally mounted charging or cocking lever which is adapted to lie
in the inoperative position in front of and in alignment with the
casing and is adapted to be swung out when required for use through
90.degree. where the lever engages a stop pin on the slider and
projects through a lateral slot in the casing so that the slider
can be moved to the rear and then when it moves forwardly again a
spring acting on the lever swings it back to the original in-line
position in line with the casing.
Inventors: |
Moller; Tilo (Oberndorf,
DT), Ketterer; Dieter (Oberndorf/Neckar,
DT) |
Assignee: |
Heckler & Koch GmbH
(Oberndorf/Neckar, DT)
|
Family
ID: |
5771049 |
Appl.
No.: |
05/142,610 |
Filed: |
May 12, 1971 |
Foreign Application Priority Data
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May 14, 1970 [DT] |
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P 20 23 523.8 |
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Current U.S.
Class: |
89/1.4; 42/71.01;
86/21; 89/125 |
Current CPC
Class: |
F41A
3/72 (20130101) |
Current International
Class: |
F41A
3/72 (20060101); F41A 3/00 (20060101); F41d
011/00 () |
Field of
Search: |
;89/1K,191,125
;42/16,71 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Engle; Samuel W.
Claims
What we claim is:
1. Charging device for automatic hand firearms, comprising a casing
part mounted on the firearm and extending in the longitudinal
direction thereof, the casing part having at least two spaced
substantially parallel side walls and a front end wall, the casing
part being provided with a continuous slot extending through a
portion of the front end wall and a portion of one of the side
walls, a slider disposed within the casing part and guided for
longitudinal movement therein, a charging lever, pivot means
pivotally connecting the charging lever to the slider, the pivot
means having a pivot axis extending substantially parallel to the
plane of the side walls, the charging lever having a portion
thereof extending through the slot outside of the casing part, and
a spring for biasing the lever into a rest position wherein the
portion of the lever extends through the portion of the slot in the
front end wall of the casing part such that the portion of the
lever is positioned in front of the front end wall of the casing
part and the slider is positioned adjacent the front end wall of
the casing part.
2. Charging device according to claim 1, characterised in that the
charging lever bears in its position of rest with an edge part
thereof against the end of the slot located in the front end wall
of the casing part.
3. Charging device according to claim 1, characterised in that the
charging lever is provided with an enlarged hand grip at the
portion therof projecting out of the casing part and the projection
is formed by the end part of the hand grip nearest the casing
part.
4. Charging device according to claim 3, characterised in that the
hand grip has substantially the same cross-section as the casing
part.
5. Charging device according to claim 3, characterised in that the
forward end of the charging lever terminates flush with the forward
end of a hand guard mounted on the firearm and extending in the
longitudinal direction of the firearm.
6. Charging device according to claim 3, characterised in that the
casing part has the shape of a flat rectangle as seen in
cross-section transverse to the plane of the sidewalls.
7. Charging device according to claim 1, characterised in that the
charging lever is fitted to a forked part provided at the front end
of the slider and is supported on a pivot pin of the pivot means
traversing the forked part and that a stop pin is provided at the
corner of the said forked part remote from the slot in the casing
part against which a nose part of the loading lever bears in its
position of use.
8. Charging device according to claim 7, in which the spring for
biasing the charging lever is formed by a torsion spring arranged
concentrically to a sleeve receiving the pivot pin and which
engages at one end the stop pin and bears at the other end against
the nose part of the charging lever.
Description
The invention relates to a loading or cocking device for automatic
hand firearms such as rifles, which embody a breech movable in the
longitudinal direction thereof with a slider guided in a casing
part of the weapon and movable in the longitudinal direction
thereof, the rear end of which lies opposite a front end face of
the breech and which embodies at its forward end a displaceable
loading or cocking lever which traverses a slot in a side wall of
the casing part and extends in the longitudinal direction of the
weapon and is loaded by a spring which tends to rock it forwardly
and to hold it in a position of rest.
Such loading or cocking device serves to move the breech from its
forward position to a rearward position in order that either the
breech is caught in the rearward position by the trigger mechanism
ready for firing the weapon, or introduces a cartridge into the
barrel during the forward travel when the weapon is to be made
ready for firing. Furthermore, the pulling back of the breech may
be necessary for eliminating blockages.
The rearward movement of the breech is effected in such manner that
the slider is moved rearwardly in the corresponding part of the
casing by means of the cocking lever so that this slider comes to
rest at its rear end against a forward end face of the breech and
carries the breech to its rearward position. During firing the
slider must be held in a forward position in which the front end
face of the breech still does not contact the slider when the
breech adopts its foremost position in order that the slider does
not hinder the breech movement and is not subjected to any impact
which could lead to damage of the loading or cocking device.
Moreover the user should not be liable to injury by the cocking
lever moving with the slider. Therefore the known loading or
cocking device provides the possibility of locking the slider in
its forward position.
Furthermore for overcoming the closure spring or main spring during
return movement of the breech with heavier hand firearms, a
substantial force must often be applied which requires that the
loading or cocking lever must be made sufficiently large in order
that it offers a good hand hold. Such a hand lever projecting from
the weapon is however very objectionable for which reason with
known loading or cocking devices the loading or cocking lever is
displaceable and movable forwardly against the side wall of the
casing part in which the slider is guided. Thereby the locking of
the slider in its forward position ensures that the loading or
cocking lever is brought into engagement with a suitable catch
member when folded down on to the casing part.
These known loading or cocking devices have the disadvantage that
also the loading lever folded against the side wall of the casing
part represents a constructional element of substantial size
projecting beyond the contour of the weapon which can be
obstructive during use of the weapon especially for use in
difficult country with thick undergrowth. Furthermore the user must
take particular care that the slider is brought to its forward
position after cocking and the cocking lever has come actually to
engagement with the catch members provided, in order that the
slider is actually retained and no disturbance or source of danger
can occur in subsequent use.
The invention is directed to the problem of avoiding these
disadvantages of the known loading or cocking devices and to
construct such a loading or cocking device that the loading or
cocking lever forms no part projecting beyond the contour of the
weapon and also permits a reliable locking of the slider in its
position of rest.
This object is attained according to the invention by the fact that
the slot arranged in one side wall of the casing part for guiding
the slider extends up to a front terminal wall of this casing part,
the slider in its position of rest adopts a position adjacent to
the forward end of this casing part, and the charging or cocking
lever is swung in its position of rest in front of the terminal
wall of this casing part and fits over at least a portion of this
terminal wall by a projection thereof.
With the loading or cocking device according to the invention the
loading or cocking lever forms in its position of rest an extension
of the casing part containing the slider, so that in its position
of rest no part thereof extends laterally from the weapon casing
but rather is embodied in the contour formed by the weapon casing.
Further, provision is made that the slider is satisfactorily locked
in its forward position when the loading or cocking lever is
located in its position of rest.
Defective locking is immediately recognisable by the lateral
projection of the loading or cocking lever. The user need therefore
take no particular care that the charging or cocking lever comes
correctly in engagement with the catch members provided for this
purpose but he is always sure that the slider is satisfactorily
locked when he has brought the loading or cocking lever into its
position of rest disposed in line with the casing part. A further
advantage of the cocking device according to the invention consists
in the fact that it has moreover a simple construction since
special locking elements for the cocking lever are not
required.
The loading or cocking lever can be held in a simple way in its
position of rest by the fact that one edge bears on the end of the
slot located in the forward terminal wall of the casing part. The
construction of the loading or cocking device according to the
invention offers moreover the possibility of providing the loading
or cocking lever at its end projecting from the casing part with an
enlarged hand grip which permits a particularly good grip on the
loading or cocking lever since sufficient space is available in the
extension of the casing part for an enlarged hand grip without the
cocking lever being affected in appearance. Likewise the projection
on the cocking lever by which it fits over a portion of the
terminal wall of the casing part can be formed by the end of the
hand grip nearest the casing part. This hand grip can have in
particular substantially the same cross-section as the casing part
and moreover the forward end of the cocking lever can be cut off
flush with the forward end of a hand guard for the weapon whereby a
particularly satisfactory arrangement of the cocking lever within
the contour of the weapon is obtained. A particularly desirable
form for the hand grip and likewise a particularly compact
construction is then obtained if the casing part in which the
slider is guided has the shape of the flat rectangle as seen in
cross-section.
In a further arrangement of the invention the cocking lever engages
in a forwardly open slot provided at the forward end of the slider
and is supported on a pin which is in the portion of the slider
unit defining the slot. In this way a stop pin is provided at the
forward end of the slot at the corner of the said portion remote
from the slot in the casing part to which the cocking lever comes
to bear in its position of use by means of a nose portion. In this
way a simple supporting of the cocking lever is obtained in the
slider and satisfactory restriction in the rocking movement of the
cocking lever into the position of use which is able to absorb very
substantial forces. With such a mounting of the cocking lever the
spring loading the cocking lever can be formed in a particularly
simple way by a spiral or torsion spring which is arranged
concentrically to a sleeve receiving a bearing pin and is supported
at one end on the stop pin and at the other end on the nose part of
the cocking lever.
Further details and arrangements of the invention will be
appreciated from the following description in which the invention
is further described and explained with reference to the
constructional example shown on the drawing. The features taken
from the description on the drawing can be used individually in
other embodiments of the invention or several of them may be
utilised in various combinations.
As shown in the drawings:
FIG. 1 is a side view of a firearm with a loading or cocking device
according to the invention,
FIG. 2 shows partially in plan and partially in section the loading
or cocking device of the firearm according to FIG. 1 on a larger
scale, and
FIG. 3 is a section on the line III--III through the loading or
cocking device according to FIG. 2.
The weapon casing 1 of the automatic rifle shown in FIG. 1 embodies
a casing portion 2 which extends above the barrel 3 and a hand
guard 4 covering the barrel from beneath and laterally, which
extends forwardly beyond the bolt of the rifle, not further shown
in FIG. 1. In this casing part 2 there is located the loading or
cocking device further shown in FIGS. 2 and 3, which consists of a
slider 5 guided in the casing part 2 and a cocking lever 6
pivotally secured to the slider.
The slider 5 comprises two bars 7 and 8 which are slidably guided
in the longitudinal direction of the casing part 2 which is in the
form of a flat rectangle in cross-section, and are connected at
their forward ends by a head member 9 and at their rear ends by a
cross member, not further shown. The cross member has a small
spacing from a corresponding end face of the breech located in its
foremost position, in the position of rest of the slider 5, so that
on a return movement of the slider 5 in the casing part 2 the rear
end of the slider comes to bear by its cross member against the end
face of the breech and thereby the breech can be moved to its
rearward position, as is known with such automatic hand
firearms.
The cocking lever 6 serves for operating the slider 5, and the
casing part 2 serving for guiding the slider embodies a
longitudinal slot 10 in the left-hand side wall in the position of
use of the rifle by which the cocking lever 6 connected with the
slider 5 projects from the casing part 2. The head member 9 of the
slider 5 is forked as shown at 11 in the plane of the slot 10 in
the casing part 2 and supports an arm 12 forming part of the
cocking lever 6. This arm 12 is pivotally supported in the slot 11
on a pin 13 which is inserted in the walls 14 and 15 bounding the
slot 11. The thickness of the arm 12 is less than the width of the
slot 11 and, as will be seen from FIG. 3, the arm 12 is held in
engagement on the lower wall 4 of the head member 9 by a sleeve 16
which is supported concentrically on the pin 13 and is surrounded
by a coil spring 17 the ends of which are retained by a stop pin 18
which connects the forward corners of the walls 14 and 15 of the
head member 9 and which are adjacent at the side wall of the casing
2 opposite to the slot 10. The other end of the coil spring 17 fits
behind a nose part 19 which is formed by a portion of the loading
lever 6 lying diametrically opposite to the arm 12. This nose part
19 is moreover so arranged that it comes into engagement with the
stop pin 18 by its surface 20 remote from the slot 10 in the casing
part 2 when the loading lever is swung laterally outwards from the
position shown in full lines in FIG. 2.
The coil spring 16 tends to hold the charging lever 6 in the
position of rest in which the charging lever, as shown, is extended
in the longitudinal direction of the casing part 2. Thereby the arm
12 of the charging lever 6 traverses a portion of the slot 10 which
extends up to the front terminal wall 21 of the casing part 2. In
this position of rest the left-hand side of the arm 12, as seen in
the firing direction, terminates approximately with the left-hand
outer surface of the casing part 2 while the right-hand edge 22 of
the arm 12 extends approxmately into the longitudinal center plane
of the casing 2 and bears against the edge of the closure wall 21
which limits the portion of the slot in the casing extending up to
the closure wall.
A hand grip 23 is fastened to the portion of the arm 12 projecting
out of the casing part 2 and of the closure wall 21 which grip,
apart from the lateral depressions which increase the grip factor,
has substantially the same dimensions as the casing part 2.
Moreover the length of the hand grip 23 is so proportioned that it
terminates flush with the forward end face of the hand guard 4 and
embodies the same inclination as this terminal face.
It will be seen that in the position of rest the hand grip 23 of
the charging lever extends in line with the casing part 2 serving
for guiding the slider 5 without projecting beyond the contours
therof and moreover its length is so proportioned that the hand
grip also does not stand beyond the hand guard 4. Consequently the
charging lever so far as it appears from the outside in the form of
a hand grip 23, lies completely within the contour of the weapon so
that the handling of the weapon is in no way affected. There is
also no danger that the user would be caught up in undergrowth by
the loading lever of the weapon. Furthermore provision is made when
the loading lever adopts the position of rest shown, that it holds
the slider 5 reliably in its forward position of rest in which it
bears by the forward end face of its head member 9 against a stop
25 fitted in the casing part 2. Also the stop, which is formed by
an inserted block, embodies a suitable slot for receiving the arm
12 of the loading lever 6. This slot can also be so constructed
that the arm 12 bears in the position of rest against the surface
defining or terminating the slot.
Furthermore despite the incorporation of the charging lever within
the contours of the weapon the charging lever can be easily engaged
by its hand grip 23 and swung outwardly until it comes into
engagement with the stop pin 18 by the striker face 20 on the nose
part 19. The charging lever then projects laterally out of the slot
10 of the casing part 2 and forms a good hand hold for pulling back
the slider and thus cocking the breech. When the slider is brought
by hand, or after its release from the forwardly moving breech,
again to the forward position, the charging lever 6 swings back to
its position of rest again under the force of the torsion spring 17
and then holds the slider reliably in its forward position without
the user having to exert particular care with the locking of the
slider.
It will be seen that by the invention a particularly simple and
also particularly reliable charging device is provided by which the
use of automatic hand firearms is considerably facilitated.
* * * * *