U.S. patent application number 10/971538 was filed with the patent office on 2005-10-20 for hand firearm.
This patent application is currently assigned to S.A.T. SWISS ARMS TECHNOLOGY AG. Invention is credited to Mayerl, Michael W..
Application Number | 20050229772 10/971538 |
Document ID | / |
Family ID | 34639425 |
Filed Date | 2005-10-20 |
United States Patent
Application |
20050229772 |
Kind Code |
A1 |
Mayerl, Michael W. |
October 20, 2005 |
Hand firearm
Abstract
A hand firearm, in particular a pistol, with an insert, a breech
movably guided on the insert, a barrel and a control mechanism for
controlling the locking and unlocking of the breech with the
barrel. In order to simplify the control mechanism, it includes a
control spindle replaceably arranged on the insert and further an
associated open control cam on the barrel.
Inventors: |
Mayerl, Michael W.;
(Fleckeby, DE) |
Correspondence
Address: |
FLEIT KAIN GIBBONS GUTMAN BONGINI & BIANCO
COURVOISIER CENTRE II, SUITE 404
601 BRICKELL KEY DRIVE
MIAMI
FL
33131
US
|
Assignee: |
S.A.T. SWISS ARMS TECHNOLOGY
AG
NEUHAUSEN
CH
|
Family ID: |
34639425 |
Appl. No.: |
10/971538 |
Filed: |
October 22, 2004 |
Current U.S.
Class: |
89/167 |
Current CPC
Class: |
F41A 5/04 20130101 |
Class at
Publication: |
089/167 |
International
Class: |
F41A 001/00 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 2, 2004 |
EP |
04 002.132.1 |
Claims
What is claimed is:
1. A hand firearm, in particular a pistol, comprising an insert, a
breech movably guided on the insert, a barrel and a control
mechanism for controlling the locking and unlocking of the breech
with the barrel, wherein the control mechanism comprises a control
spindle replaceably arranged on the insert and an associated, open
control cam on the barrel.
2. A hand firearm according to claim 1, wherein the control spindle
is set into aligned receiving openings of the insert.
3. A hand firearm according to claim 1, wherein the insert
comprises two spaced-apart lateral cheeks connected to one another
at their front ends via a lower connection web.
4. A hand firearm according to claim 1, wherein outwardly bent
front and rear guide webs guiding the breech are provided on the
upper side of the two lateral cheeks.
5. A hand firearm according to claim 1, wherein the insert is a
one-piece stamped bent part made from sheet metal.
6. A hand firearm according to claim 1, wherein the open control
curve is arranged on a control boss formed on the bottom of the
barrel.
7. A hand firearm according to claim 1, wherein the open control
curve comprises a stop surface running parallel to the axis of the
barrel and that is a sloping control surface.
8. A hand firearm according to claim 7, wherein the sloping control
surface is arranged in a control groove running obliquely in the
control boss.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The invention relates to a hand firearm, especially a
pistol.
[0003] 2. Prior Art
[0004] Large-caliber pistols as rule comprise a locked breech in
which the movably seated barrel is locked to the breech in the rest
position. This lock is not released until the projectile has left
the barrel and the breech together with the barrel has moved back a
short distance as a consequence of the recoil. In known hand
firearms, the control of locking and unlocking is frequently
effected by control slope or enclosed control cams provided on the
barrel and by corresponding control elements that are either formed
directly on the butt or are mounted as separate inserts in the
butt. However, the manufacture of enclosed control cams is
technically complex and therefore associated with correspondingly
high manufacturing costs. Even manufacturing control elements
formed directly on the butt is complicated and correspondingly
cost-intensive. Likewise, even the assembly of inserts inserted
into the butt with control elements arranged thereon requires a
great expenditure of time and cost as well as a large amount of
professional knowledge on the part of the assemblers. In addition,
a replacement of parts that have become unusable due to wear or
destruction is assembly-intensive, time-consuming and very
expensive in the case of such inserts, since all the inserts have
to be replaced.
[0005] Hand firearms are also already known in which the control
element cooperating with a control boss on the barrel is designed
as a so-called multifunctional lever (breakdown lever, slide stop
lever). Even this design is cost-intensive and expensive to
manufacture. Moreover, breaking down the weapon with such a
multifunctional lever is bothersome and therefore not very
user-friendly.
SUMMARY OF THE INVENTION
[0006] The invention address the problem of creating a hand firearm
of the initially cited type that comprises a simplified control
mechanism for controlling locking and unlocking. This problem is
solved by a hand firearm with the features as described herein.
[0007] In the hand firearm in accordance with the invention,
control of locking and unlocking is effected via an open control
curve on the barrel as well as via a control spindle replaceably
arranged in the receiving bores of an insert. The impulse for the
locking or unlocking procedures is supplied by the breech, movably
guided on the insert, which is at first moved back by the recoil
and is subsequently pushed forward again by a closing spring. The
control spindle is an uncomplicated structural component,
manufacturable, e.g., as a turned part in a simple and economical
manner, that can be readily mounted and replaced rapidly and
economically in the case of wear or destruction. The control
spindle inserted in the insert can be readily and rapidly exchanged
without great mounting expense and without special professional
knowledge. Any wear can be compensated by using different diameters
of the control spindle. Since the control spindle does not have to
assume any further functions as a slide stop lever, breakdown lever
or the like, the hand firearm can also be broken down in a simple
and rapid manner. Even the open control curve provided on the
barrel and cooperating with the control spindle does not require
any great manufacturing cost, and can be manufactured in an
economical manner. The control mechanism formed by the open control
cam and the replaceable control spindle is not sensitive to
contamination and assures a high degree of operational safety.
[0008] Practical embodiments and advantageous further developments
of the invention are indicated in the following detailed
description. Thus, the replaceable control spindle is set in a
simple manner into the aligned receiving bores on two opposing side
cheeks of the insert. This makes an especially simple assembly and
disassembly possible.
[0009] In a preferred embodiment the open control cam cooperating
with the control spindle is provided on a control boss on the
bottom of the barrel. It comprises a sloping control surface that
assures, together with the control spindle, the tilting of the
barrel for unlocking the hand firearm during the rear movement of
the breech. The control curve also comprises a stop surface
parallel to the barrel axis for locking the barrel when the breech
is closed.
[0010] In another advantageous embodiment the insert consists of
two spaced-apart side cheeks connected to one another at their
front ends by a lower connecting web. The insert is advantageously
manufactured from a metal sheet, e.g., a steel sheet as a one-piece
stamped bent part.
BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Other particulars and advantages of the invention result
from the following description of a preferred embodiment, with
reference to the drawings.
[0012] FIG. 1 shows an upper part of a hand firearm with an insert,
breech and barrel, in a cut-away oblique view.
[0013] FIG. 2 shows the part of a hand firearm shown in FIG. 1 with
closed breech, in a cut-away view.
[0014] FIG. 3 shows the part of a hand firearm shown in FIG. 1 with
opened breech, in a cut-away view.
[0015] FIG. 4 shows a breech in an oblique view.
[0016] FIG. 5 shows a barrel in an oblique view.
[0017] FIG. 6 shows an insert in an oblique view.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS OF THE INVENTION
[0018] In FIGS. 1 to 3 the upper part of a hand firearm is
schematically shown with insert 1, breech 2 movably guided on
insert 1, and barrel 3. Insert 1, serving to guide breech 2 and to
support and receive functional or operating parts such as, e.g.,
trigger sleeve, breakdown lever, control bolt, etc., is built into
a known butt (not shown).
[0019] Insert 1, shown separately in FIG. 6, consists of a formed
part bent in a track shape with two upwardly projecting,
spaced-apart lateral cheeks 4, 5 connected to one another at the
front ends via lower connecting web 6. Outwardly bent front guide
webs 7 for guide channels 8, shown on the inside of breech 2 in
FIG. 3, are provided on insert 1 on the upper side of the two
lateral cheeks 4, 5 for the longitudinal guidance of breech 2.
Moreover, aligned openings for various support or guide pins are
placed in the two lateral cheeks 4, 5. Thus, circular perforations
9 for the shaft of a breakdown lever are arranged in the two
lateral cheeks 4, 5 on the U-shaped front part of insert 1. Bores
11 for a trigger sleeve are provided in two downwardly projecting,
opposite webs 10. In addition, two circular, aligned receiving
openings 12 for a control spindle 13, to be explained in detail in
the following and shown in FIGS. 1 to 3, are located above bores 11
in the two lateral cheeks 4, 5 of insert 1. Other passages,
recesses and/or stops for operating or functional elements of the
hand firearm, which are not described in detail, can be provided on
insert 1. The previously described insert 1 is manufactured in an
especially advantageous manner from a metal sheet, preferably a
steel sheet, as a one-piece stamped bent part.
[0020] FIG. 4 shows breech 2 movably guided in the longitudinal
direction on insert 1. It comprises ejection opening 15 with front
locking surface 16 on the front on which locking surface 17 comes
to rest when breech 2 is closed according to FIG. 2. In a known
manner, breech 2 comprises rear receiving bore 20 (shown in FIG. 1)
for a firing pin (not shown) adjacent to front barrel opening 18
and block 19 arranged below it for a closing spring.
[0021] Barrel 3 shown alone in FIG. 5 comprises cartridge chamber
21, designed as a locking block, on whose front side barrel-side
breech surface 17 is located. Control boss 22 is formed on the
bottom of cartridge chamber 21 and comprises an open control cam
with stop surface 23 running parallel to the barrel axis and with
sloping control surface 24. Control surface 24 is provided on guide
channel 25 running obliquely in control boss 22. A control
mechanism for controlling the locking and unlocking of barrel and
breech that can be manufactured in a simple and economical manner
and is extremely reliable is formed by the control cam and
associated control spindle 13.
[0022] The mode of operation of the control mechanism for
controlling the locking and unlocking is explained in the following
using FIGS. 2 and 3.
[0023] In FIG. 2, breech 2 is in its closed position. Cartridge
chamber 21 of barrel 3, designed as a massive block, is adapted in
its shape and dimensions to ejection opening 15 of breech 2 such
that its edges fit into ejection opening 15, thus assuring a firm
connection between breech 2 and barrel 3. Barrel 3 rests with its
lower stop surface 23 on control spindle 13, which prevents a
tilting of barrel 3.
[0024] After the firing of a shot, breech 2 and barrel 3 at first
move back a short distance together as a consequence of the recoil
until control spindle 13 moves into sloping groove 25 and comes to
rest on sloping control surface 24. Barrel 3 is then tilted
downward, as a consequence of which breech 2 can continue its
backward movement without being impeded and a reloading process can
take place.
[0025] In FIG. 3, breech 2 of the hand firearm is in the open or
unlocked position. Barrel 3 is tilted downward after
backward-traveling breech 2 has at first entrained barrel 3 and
barrel 3 was guided downward after the entrance of control spindle
13 into sloping guide channel 25.
* * * * *