NO342636B1 - Pneumatic Launcher - Google Patents

Pneumatic Launcher Download PDF

Info

Publication number
NO342636B1
NO342636B1 NO20161590A NO20161590A NO342636B1 NO 342636 B1 NO342636 B1 NO 342636B1 NO 20161590 A NO20161590 A NO 20161590A NO 20161590 A NO20161590 A NO 20161590A NO 342636 B1 NO342636 B1 NO 342636B1
Authority
NO
Norway
Prior art keywords
barrel
line
piston
piston assembly
pneumatic launcher
Prior art date
Application number
NO20161590A
Other languages
Norwegian (no)
Other versions
NO20161590A1 (en
Inventor
Henrich Henriksen
Original Assignee
H Henriksen As
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by H Henriksen As filed Critical H Henriksen As
Priority to NO20161590A priority Critical patent/NO342636B1/en
Priority to PCT/EP2017/072651 priority patent/WO2018065169A1/en
Publication of NO20161590A1 publication Critical patent/NO20161590A1/en
Publication of NO342636B1 publication Critical patent/NO342636B1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/36—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information
    • F42B12/56—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information for dispensing discrete solid bodies
    • F42B12/68—Line-carrying missiles, e.g. for life-saving
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A25/00—Gun mountings permitting recoil or return to battery, e.g. gun cradles; Barrel buffers or brakes
    • F41A25/16—Hybrid systems
    • F41A25/20—Hydropneumatic systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B11/00—Compressed-gas guns, e.g. air guns; Steam guns
    • F41B11/60—Compressed-gas guns, e.g. air guns; Steam guns characterised by the supply of compressed gas
    • F41B11/62—Compressed-gas guns, e.g. air guns; Steam guns characterised by the supply of compressed gas with pressure supplied by a gas cartridge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B11/00—Compressed-gas guns, e.g. air guns; Steam guns
    • F41B11/60—Compressed-gas guns, e.g. air guns; Steam guns characterised by the supply of compressed gas
    • F41B11/64—Compressed-gas guns, e.g. air guns; Steam guns characterised by the supply of compressed gas having a piston effecting a compressor stroke during the firing of each shot
    • F41B11/642—Compressed-gas guns, e.g. air guns; Steam guns characterised by the supply of compressed gas having a piston effecting a compressor stroke during the firing of each shot the piston being spring operated
    • F41B11/643—Compressed-gas guns, e.g. air guns; Steam guns characterised by the supply of compressed gas having a piston effecting a compressor stroke during the firing of each shot the piston being spring operated the piston being arranged concentrically with the barrel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B11/00—Compressed-gas guns, e.g. air guns; Steam guns
    • F41B11/70—Details not provided for in F41B11/50 or F41B11/60
    • F41B11/73—Sealing arrangements; Pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B11/00—Compressed-gas guns, e.g. air guns; Steam guns
    • F41B11/80—Compressed-gas guns, e.g. air guns; Steam guns specially adapted for particular purposes
    • F41B11/83—Compressed-gas guns, e.g. air guns; Steam guns specially adapted for particular purposes for launching harpoons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B30/00—Projectiles or missiles, not otherwise provided for, characterised by the ammunition class or type, e.g. by the launching apparatus or weapon used
    • F42B30/14—Harpoons

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Toys (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Actuator (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

The present invention provides a pneumatic launcher (1) for launching a device (11), comprising a barrel (2), a piston assembly (8) and a piston stopping assembly (9); the barrel (8) has a first end (3) and a second end (4), the first end (3) is connected to a high-pressure gas source (5) able to provide pressurized gas to the first end (3), and the second end (4) is open; the piston assembly (8) is arranged in the barrel and comprises a circumference sealed against the inner surface of the barrel and is movable within the barrel from a first position (A) to a second position (B) during launch of the device, the first position is closerto the first end than the second position; and the piston stopping assembly is arranged to restrain the piston assembly (8) when in the second position.The present invention provides a pneumatic launcher (1) for launching a device (11), comprising a barrel (2), a piston assembly (8) and a piston stopping assembly (9); the barrel (8) has a first end (3) and a second end (4), the first end (3) is connected to a high-pressure gas source (5) capable of providing pressurized gas to the first end (3) , and the second end (4) is open; the piston assembly (8) is arranged in the barrel and comprises a circumference sealed against the inner surface of the barrel and is movable within the barrel from a first position (A) to a second position (B) during launch of the device, the first position is closed the first end than the second position; and the piston stopping assembly is arranged to restrain the piston assembly (8) when in the second position.

Description

Field of the invention
The present invention relates to the field of pneumatic launchers, more specifically to a sound dampened pneumatic launcher and a kit for sound dampening of pneumatic launchers.
Background
Pneumatic launchers are used for multiple applications including the launching of grappling hooks, rescue lines, deploying safety measures, such as floatation devices, and the launching of arrows/darts for tagging animals.
When used for launching grappling hooks, the hook may for instance be connected to a rope or ladder. The rope/ladder may be used for scaling buildings, boarding ships and offshore structures, crossing ravines etc. To launch a grappling hook to a height of up to for instance 50 m the required gas pressure is significant. The subsequent release of the gas pressure during launch of the grappling hook provides a shock wave, which is audible from large distances.
A disadvantage of prior art pneumatic launchers is that the operator and people around him will be exposed to high noise, which again may result in subsequent hearing loss. Further, such launchers are also used by armed forces in operations requiring stealth (e.g. hostage situations etc.) and the audible sound made by the launcher may be detrimental for a successful outcome.
There is presently no solution for this drawback of pneumatic launchers.
The goal of the present invention is to provide a pneumatic launcher, which avoids or alleviates at least some of the disadvantages of the prior art launchers.
Summary of the invention
The present invention is defined by the appended claims and in the following:
In a first aspect, the present invention provides a pneumatic launcher for launching a device, comprising a barrel, a piston assembly and a piston stopping assembly;
- the barrel has a first end and a second end, wherein the first end is connected to a high-pressure gas source able to provide pressurized gas to the first end, and the second end is open;
- the piston assembly is arranged in the barrel and comprises a circumference sealed against the inner surface of the barrel and is movable within the barrel from a first position to a second position during launch of the device, the first position is closer to the first end than the second position, and the piston assembly comprises a plateshaped piston element and a guiding element, the guiding element is arranged to hold the plate-shaped piston element perpendicular to the centerline of the barrel; and
- the piston stopping assembly is arranged to restrain the piston assembly when in the second position.
In an embodiment of the pneumatic launcher, the guiding element may also be arranged to keep the circumference of the piston assembly sealed against the inner surface of the barrel during movement from the first position to the second position. By having a plate-shaped piston element, the travel length of the device being launched will be substantially unchanged compared to a pneumatic launcher without a piston element. Further, the mass of the piston element is minimized, such that the force provided to the device being launched is maximized.
In an embodiment of the pneumatic launcher, the guiding element comprises a cylindrical flange arranged at one side of the piston element, preferably the side facing the second end of the barrel. The outer circumference of the cylindrical flange is preferably equal to the outer circumference of the plate-shaped piston element. Preferably, the cylindrical flange is perpendicular to the circular plate and is sealed against the inner surface of the barrel. Preferably, the flange extend from the circular plate in the direction of the second end of the barrel.
In an embodiment, the pneumatic launcher comprises a pressure release valve arranged to release a gas pressure from an internal volume of the barrel after launch of the device. The pressure release valve may be a one-way valve or the valve may be a manually operated on/off valve, which will allow the operator to choose when to release the high-pressure gas in the internal volume V. In the latter case, the on/off valve may be spring-loaded to prevent for instance water from entering the internal volume when the launcher is submerged. The internal volume delimited by the piston assembly in the second position. In a further embodiment, the pressure release valve is fluidly connected to a sound silencer.
In an embodiment of the pneumatic launcher, the first end is fluidly connected to the high-pressure gas source via at least one valve.
In an embodiment of the pneumatic launcher, the piston stopping arrangement comprises a restraining line attached to the piston assembly and internal to the pneumatic launcher, such that the piston assembly is restrained in the second position by the restraining line and prevented from exiting the second end of the barrel. In most embodiments, the restraining line is preferably non-elastic, but may be elastic in some embodiments to provide a dampening effect on the speed of the piston element when close to the second position. This may be advantageous when used in large pneumatic launchers, wherein the weight/mass of the piston element is increased. By use of a restraining line attached to the piston assembly and internal to the pneumatic launcher, the section of the barrel in contact with the device being launched is not modified or affected. The latter is especially important when the launcher is obtained by modifying a prior art launcher as no new limitations are put upon the type or nature of the device being launched.
In yet an embodiment of the pneumatic launcher, the restraining line is attached at the side of the piston assembly facing the first end of the barrel.
In an embodiment of the pneumatic launcher, the piston stopping arrangement comprises a stopper device, the stopper device is arranged to interact with a part of the piston assembly facing the second end of the barrel, such as a flange, when the piston assembly is in the second position, and is spring mounted on an external surface of the barrel.
In a second aspect, the present invention provides a kit for modifying a pneumatic launcher comprising a barrel having a first end and a second end, wherein the first end is connected to a high-pressure gas source able to provide pressurized gas to the first end, and the second end is open, the kit comprises a piston assembly, a lineconnecting element and a restraining line, wherein:
- the line-connecting element is mountable at the first end of the barrel and comprises a first line mount;
- the piston assembly is arrangeable in the barrel and comprises a second line mount and a circumference sealable against an inner surface of the barrel; and
- the restraining line is connectable to the first and the second line mount, such that the piston assembly is movable within the barrel from a first position to a second position, the first position being closer to the first end of the barrel than the second position.
The barrel of the pneumatic launcher to be modified is preferably a removable and/or exchangeable barrel.
In an embodiment of the kit, the piston assembly comprises a plate-shaped piston element and a guiding element; the guiding element arranged to hold the plateshaped piston element perpendicular to the centerline of the barrel. The guiding element may also be arranged to keep the circumference of the piston assembly sealed against the inner surface of the barrel during movement from the first position to the second position.
In an embodiment of the kit, the guiding element comprises a cylindrical flange arranged at one side of the piston element, preferably the side, which will face the second end of the barrel after modification of the pneumatic launcher. The outer circumference of the cylindrical flange is preferably equal to the outer circumference of the plate-shaped piston element. Preferably, the cylindrical flange is perpendicular to the circular plate and is sealable against an inner surface of the barrel. Preferably, the flange extend from the circular plate in the direction of the second end of the barrel after modification of the pneumatic launcher.
In yet an embodiment of the kit, the line-connecting element is ring-shaped and comprises a cutout for providing fluid communication between the first end of the barrel and the high-pressure gas source.
In an embodiment of the kit, the line-connecting element comprises a rib arranged at its circumference, the outer diameter of the rib being larger than an inner diameter of the barrel, such that the line-connecting element is clamped in place at, or by, the first end of the barrel.
In a third aspect, the present invention provides a method of modifying a pneumatic launcher comprising a barrel having a first end and a second end, wherein the first end is connected to a high-pressure gas source able to provide pressurized gas to the first end, and the second end is open, the method comprises the steps of:
- mounting a line-connecting element, comprising a first line mount, at the first end of the barrel;
- arranging a piston assembly, comprising a second line mount and a circumference sealable against an inner surface of the barrel, in the barrel; and
- connecting a restraining line to the first and the second line mount, such that the piston assembly is movable within the barrel from a first position to a second position, the first position being closer to the first end of the barrel than the second position.
The kit and method according to the present invention may advantageously also comprise any of the technical features defined for the pneumatic launcher of the first aspect.
In all aspects of the invention, the length of the plate-shaped piston element, in the longitudinal direction of the barrel, is preferably less than the radius of the piston assembly.
In all aspects of the invention, the barrel may be adapted to accommodate a collapsed or folded grappling hook, for instance a grappling hook having springloaded tines.
The device to be launched from the pneumatic launcher include, but is not limited to, devices such as a grappling hook, an arrow/dart, a floatation device and rescue line.
Short description of the drawings
The present invention is described in detail by reference to the following drawings:
Figs. 1a-1f show schematic drawings of a pneumatic launcher according to a first embodiment of the invention, and its operation during launch of a grappling hook.
Figs. 2a-2c show schematic drawings of a second embodiment of a pneumatic launcher according to the invention.
Figs. 3a and 3b show schematic drawings of an auxiliary silencing feature for the embodiments in figs. 1 and 2.
Fig. 4 is a perspective view of a noise reduction kit for a pneumatic launcher.
Fig. 5 are perspective views of the piston in the noise reduction kit in fig. 4.
Fig. 6 are perspective views of the retainer element in the noise reduction kit in fig.
4.
Fig. 7a-7c are schematic drawings showing the steps of modifying a pneumatic launcher with the noise reduction kit in fig. 4.
Detailed description of embodiments of the invention
An embodiment of a pneumatic launcher according to the invention is shown in figs. 1a-1f. The launcher is suitable for launching a wide variety of devices, such as arrows/darts, floatation devices and rescue lines. The device used in the description of this particular embodiment is a grappling hook 11. The launcher comprises a barrel 2, within which a piston assembly 8 is arranged. A high-pressure gas source 5, i.e. a pressurized gas vessel is fluidly connected to the first end 3 of the barrel via two valves 7,6 and a pressure chamber 21. The piston assembly comprises a circular plate 12 (or plate-shaped piston element) and a flange 13 (i.e. a guiding ring or guiding element) arranged around or at its circumference. The flange 13 or circular plate 12 is sealed against the inner surface 14 of the barrel 2 in a gas tight manner (the flange and plate is shown at a distance from the inner surface of the barrel for illustrative purposes). The sealing between the piston assembly and the inner surface of the barrel may be obtained for instance by having at least one seal ring embedded in the flange, or the circumferential surface of the circular plate (see fig.
5), and arranged between the piston assembly and the barrel. The flange provides a stable movement of the piston assembly 8. Alternatively, the circumference of the piston assembly is precisely fitted to seal against the barrel. The launcher is provided with a piston stopping arrangement comprising a restraining line 9. The line has a first end 16 and a second end 17, wherein the first end is attached to the piston assembly 8 by a handle 22 (or a first line mount) arranged on the end of the piston assembly facing the first end 3 of the barrel. The second end 17 is attached to a line mount 15 (or second line mount) arranged inside the barrel at a position between the valve 6 and the piston assembly 8.
The operation of the grappling hook launcher is explained by reference to figs. 1b-1f.
During use, a foldable/collapsible grappling hook 11 is arranged in the barrel 2 in contact with the end of the piston assembly facing the second end 4 of the barrel, as shown in fig. 1b. The grappling hook comprises multiple tines/claws 20 and a mount 23 for attaching a climbing line or rope ladder. Before launch of the grappling hook 11, the piston assembly is in position A.
Pressurized gas in the pressure vessel 5 (i.e. a source of pressurized gas) is transferred to the pressure chamber 21 via the valve 7, see figs. 1c and 1d. The pressure obtained in the pressure chamber decides the force with which the grappling hook is launched and may be regulated to control the launch distance/height of the hook. When a desired pressure is obtained in the pressure chamber, the valve 7 to the pressure vessel is closed.
To launch the grappling hook 11, the valve 6 separating the pressure chamber from the first end 3 of the barrel is opened, see fig.1e. The gas pressure launches/pushes the piston assembly, and consequently the grappling hook 11, towards the opening 4 (i.e. the second end) of the barrel. The piston assembly is restrained from moving beyond position B by the restraining line 9, and the grappling hook 11 is launched from the opening 4 of the barrel. After launch, the pressurized gas in the internal volume V, delimited by the first end 3 of the barrel and the piston assembly 8 in position B is released through the pressure release valve 10. The pressure release valve may be a one-way valve allowing the pressurized gas to exit while preventing external fluids, such as water, to enter the barrel. Due to the speed of the pressure build-up during launch, the valve may be open at all times without compromising the force with which the grappling hook is launched. Alternatively, the valve may be a manually operated on/off valve, which will allow the operator to release the high-pressure gas in the internal volume V at a later stage. In this specific embodiment, the valve 10, and its fluid connection to the internal volume, is arranged at the first end of the barrel. In other embodiments, the valve 10, and its fluid connection to the internal volume V, may be arranged at other positions provided the high-pressure gas in the internal volume may be released sufficiently to allow the piston assembly to return to position A.
An alternative embodiment of a piston stopping arrangement in a grappling hook launcher according to the invention is shown in figs. 2a-2c. In this embodiment, the stopping arrangement comprises a stopper device 18 arranged at the second end 4 of the barrel 2. The stopper device 18 is connected to (i.e. spring mounted) an external surface of the barrel by at least one stopper mounting device 24 and a spring 25 connecting the stopper mounting device to the stopper device. During launch of the grappling hook 11 the flange 13 of the piston assembly interacts with the stopper device 18 and is thereby restrained in position B, see fig. 2c. The pressurized gas trapped in the internal volume V, delimited by the first end 3 of the barrel and the piston assembly 8 in position B may be released through a pressure release valve as shown in figs. 1a-1f.
An auxiliary technical feature further reducing the noise/sound made by the grappling hook launcher during/after launch is shown in figs. 3a and 3b. In these embodiments, the pressure release valve 10 is connected to a sound silencer 19 to reduce the sound of the pressurized gas exiting said valve.
A noise reduced pneumatic launcher may also be obtained by modifying a prior art pneumatic launcher by use of a kit. The prior art pneumatic launcher should preferably comprise a removable/exchangeable barrel. A suitable noise reduction kit is shown in fig. 4 and comprises a piston assembly 8, see fig. 5, a restraining line 9 and a ring-shaped line-connecting element 26, see fig. 6.
The line-connecting element 26 features a first line mount 15 for attaching the restraining line 9. The line-connecting element is ring-shaped and comprises a slim rib 29 (or flange) arranged at the circumference of the line-connecting element. The outer diameter of the rib is slightly larger than the inner diameter of the barrel of the pneumatic launcher to be modified. The rib ensures that the line-connecting element may be kept in place at the first end 3 of the barrel. The line-connecting element has a cutout 30 (i.e. fluid passage) for allowing passage of pressurized gas/air into the barrel.
The piston assembly comprises a circular plate 12, a seal ring 27 in a recess at the circumferential surface of the circular plate, a guiding ring 13 (i.e. guiding element or flange) and a second line mount 28 for attaching the restraining line 9.
Depending on the pneumatic launcher to be modified, the kit may also comprise a pressure release valve 10. The pressure release valve is to replace an existing drain valve, or similar, not suitable for retaining and subsequently releasing the high air pressure in the barrel after firing.
The main steps involved when modifying a prior art pneumatic launcher with the kit in fig. 4 are shown in figs. 7a-7c. In a first step, the barrel 2 of the prior art pneumatic launcher is removed, figs. 7a and 7b. The line-connecting element 26 having the restraining line 9 fastened to the first line mount 15 is then mounted downstream the valve 6 (i.e. a valve for providing pressurized gas/air into the barrel), the piston assembly having the restraining line fastened to the second line mount 28 is introduced into the first end 3 of the barrel and the barrel is re-attached to provide a modified pneumatic launcher. Optionally, both the line-connecting element 26 and the piston assembly 8, having the restraining line fastened to the first and the second line mount, are introduced through the first end 3 of the barrel before the barrel is reattached to the launcher.

Claims (12)

Claims
1. A pneumatic launcher (1) for launching a device (11), comprising a barrel (2), a piston assembly (8) and a piston stopping assembly (9);
- the barrel (2) has a first end (3) and a second end (4), the first end (3) is connected to a high-pressure gas source (5) able to provide pressurized gas to the first end (3), and the second end (4) is open;
- the piston assembly (8) is arranged in the barrel and comprises a circumference sealed against the inner surface of the barrel and is movable within the barrel from a first position (A) to a second position (B) during launch of the device, the first position is closer to the first end than the second position, and the piston assembly (8) comprises a plateshaped piston element (12) and a guiding element (13), the guiding element arranged to hold the plate-shaped piston element (12) perpendicular to the centerline of the barrel; and
- the piston stopping assembly is arranged to restrain the piston assembly (8) when in the second position.
2. A pneumatic launcher according to claim 1, wherein the guiding element comprises a cylindrical flange (13) arranged at one side of the piston element, preferably the side facing the second end of the barrel.
3. A pneumatic launcher according to any of the claims 1 and 2, comprising a pressure release valve (10) arranged to release a gas pressure from an internal volume (V) of the barrel after launch of the device (11).
4. A pneumatic launcher according to any of the preceding claims, wherein the first end (3) is fluidly connected to the high-pressure gas source (5) via at least one valve (6,7).
5. A pneumatic launcher according to any of the preceding claims, wherein the piston stopping arrangement comprises a restraining line (9) attached to the piston assembly (8) and internal to the pneumatic launcher (1), such that the piston assembly (8) is restrained in the second position (B) by the restraining line and prevented from exiting the second end (4) of the barrel.
6. A pneumatic launcher according to claim 6, wherein the restraining line (9) is attached at the side of the piston assembly facing the first end (3) of the barrel (8).
7. A kit for modifying a pneumatic launcher comprising a barrel (8) having a first end (3) and a second end (4), wherein the first end (3) is connected to a high-pressure gas source (5) able to provide pressurized gas to the first end (3), and the second end (4) is open, the kit comprises a piston assembly (8), a line-connecting element (26) and a restraining line (9), wherein:
- the line-connecting element (26) is mountable at the first end of the barrel and comprises a first line mount (15);
- the piston assembly (8) is arrangeable in the barrel and comprises a second line mount (28) and a circumference sealable against an inner surface of the barrel; and
- the restraining line is connectable to the first and the second line mount, such that the piston assembly is movable within the barrel from a first position (A) to a second position (B), the first position being closer to the first end of the barrel than the second position.
8. The kit according to claim 7, wherein the piston assembly comprises a plateshaped piston element (12) and a guiding element (13); the guiding element arranged to hold the plate-shaped piston element (12) perpendicular to the centerline of the barrel.
9. The kit according to claim 8, wherein the guiding element comprises a cylindrical flange (13) arranged at one side of the piston element.
10. The kit according to any of claims 7-9, wherein the line-connecting element (26) is ring-shaped and comprises a cutout for providing fluid communication between the first end of the barrel and the high-pressure gas source.
11. The kit according to claim 10, wherein the line-connecting element comprises a rib arranged at its circumference, the outer diameter of the rib being larger than an inner diameter of the barrel.
12. A method of modifying a pneumatic launcher comprising a barrel (8) having a first end (3) and a second end (4), wherein the first end (3) is connected to a high-pressure gas source (5) able to provide pressurized gas to the first end (3), and the second end (4) is open, the method comprises the steps of:
- mounting a line-connecting element (26), comprising a first line mount, at the first end of the barrel;
- arranging a piston assembly (8), comprising a second line mount (28) and a circumference sealable against an inner surface of the barrel, in the barrel; and
- connecting a restraining line to the first and the second line mount, such that the piston assembly is movable within the barrel from a first position (A) to a second position (B), the first position being closer to the first end of the barrel than the second position.
NO20161590A 2016-10-04 2016-10-04 Pneumatic Launcher NO342636B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NO20161590A NO342636B1 (en) 2016-10-04 2016-10-04 Pneumatic Launcher
PCT/EP2017/072651 WO2018065169A1 (en) 2016-10-04 2017-09-08 Pneumatic launcher

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO20161590A NO342636B1 (en) 2016-10-04 2016-10-04 Pneumatic Launcher

Publications (2)

Publication Number Publication Date
NO20161590A1 NO20161590A1 (en) 2018-04-05
NO342636B1 true NO342636B1 (en) 2018-06-25

Family

ID=59811338

Family Applications (1)

Application Number Title Priority Date Filing Date
NO20161590A NO342636B1 (en) 2016-10-04 2016-10-04 Pneumatic Launcher

Country Status (2)

Country Link
NO (1) NO342636B1 (en)
WO (1) WO2018065169A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109945740B (en) * 2019-03-21 2024-02-27 哈尔滨工程大学 Novel two-level light air gun driven by high-pressure air
CN111569300B (en) * 2020-05-30 2021-04-27 中国建筑第五工程局有限公司 Falling protection device for high-altitude climbing operation
CN111569301B (en) * 2020-05-30 2021-05-14 湖北恒东电力设备有限公司 Anti-falling device for aloft work

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2169330C1 (en) * 2000-03-07 2001-06-20 Государственное предприятие "Красноярский машиностроительный завод" Hydropneumatic gun
WO2015152766A1 (en) * 2014-04-04 2015-10-08 Андрей Васильевич ВОРОНОВСКИЙ Pneumatic underwater gun

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3476048A (en) * 1967-06-30 1969-11-04 Aai Corp Underwater ammunition
US7398721B1 (en) * 2005-03-28 2008-07-15 Lockheed Martin Corporation Cold-gas munitions launch system
EP3133019B1 (en) * 2009-09-09 2018-12-05 AeroVironment, Inc. Noise suppression device for a drone launch tube
GB2485182A (en) * 2010-11-04 2012-05-09 Clive Glass Projectile and launcher

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2169330C1 (en) * 2000-03-07 2001-06-20 Государственное предприятие "Красноярский машиностроительный завод" Hydropneumatic gun
WO2015152766A1 (en) * 2014-04-04 2015-10-08 Андрей Васильевич ВОРОНОВСКИЙ Pneumatic underwater gun

Also Published As

Publication number Publication date
NO20161590A1 (en) 2018-04-05
WO2018065169A1 (en) 2018-04-12

Similar Documents

Publication Publication Date Title
WO2018065169A1 (en) Pneumatic launcher
EP3025116B1 (en) Air cannon and associated launch canister for a line-fouling system
WO2005114989A3 (en) Compact projectile launcher
US5671722A (en) Projectile launcher
US20220065581A1 (en) Two piston ejection device
WO2016049075A1 (en) Anchor buoy
US3810484A (en) Cooling water valve
KR101951263B1 (en) Underwater engine consisting of launching system of underwater vehicle
ITUB20151126A1 (en) DEVICE FOR LAUNCHING HAND GRENADE
WO2013049244A2 (en) Fluid activated retrieval device
US20130146315A1 (en) High rate discharge (hrd) valve incorporating a collet sleeve release mechanism
KR20120135116A (en) Underwater engine consisting of auto-start launching system of underwater vehicle
KR101537016B1 (en) Torpedo launch tube piston structure for pressure control based on water ram mode
RU2428591C1 (en) Separator
US20090038497A1 (en) Training stun grenade
US5699780A (en) Hydraulic impulse speargun
US10683071B2 (en) Submerged compartment fluid transfer system
US6796260B1 (en) Elastomeric ejection system with acoustically improved check valve
ES2791530T3 (en) Acoustic signature reduction device in military vessels
KR200385685Y1 (en) A rescue ring used in throwing
KR20240031669A (en) A auto shoot device of sinker for hairtail fishing
ES2718980T3 (en) Gun firing device
IT201800003125A1 (en) "Assembly for the safe control of the handling lever of an explosive charge"
US5690090A (en) Lanyard retainer for a speargun projectile
KR102274733B1 (en) Air-cylinder type underwater launcher

Legal Events

Date Code Title Description
MM1K Lapsed by not paying the annual fees