EP1936317A1 - Buse - Google Patents
Buse Download PDFInfo
- Publication number
- EP1936317A1 EP1936317A1 EP06126990A EP06126990A EP1936317A1 EP 1936317 A1 EP1936317 A1 EP 1936317A1 EP 06126990 A EP06126990 A EP 06126990A EP 06126990 A EP06126990 A EP 06126990A EP 1936317 A1 EP1936317 A1 EP 1936317A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- opening
- area
- weapon
- nozzle according
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 239000007789 gas Substances 0.000 claims abstract description 32
- 238000010304 firing Methods 0.000 claims abstract description 5
- 239000012080 ambient air Substances 0.000 description 10
- 239000007788 liquid Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
Images
Classifications
-
- 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
- F41A1/00—Missile propulsion characterised by the use of explosive or combustible propellant charges
- F41A1/08—Recoilless guns, i.e. guns having propulsion means producing no recoil
Definitions
- the present invention relates to a nozzle for a weapon comprising a launcher which constitutes a guide for a projectile or missile; the nozzle comprises a wall, a first opening connected to the launcher and a second opening. The area of the first opening is smaller than the area of the second opening.
- Weapons such as handheld weapons from which a projectile or missiles are shot are in some cases provided with a launcher without a nozzle.
- the nozzle is arranged in the rear end of a launcher which constitutes a guide for the projectile.
- the projectile is guided by the launcher and leaves the front end of the launcher towards a target.
- a flame is created by the projectile when the weapon is fired. The flame creates gases of high temperature which expands at the rear end of the launcher of the weapon, through the nozzle. In this connection also a high pressure being created behind the launcher.
- the countermass may be a liquid enclosed in a container arranged in the launcher behind the projectile.
- the countermass in form of liquid leaves the rear end of the weapon when the weapon is fired and thereby produces a pressure-reducing effect adjacent to the weapon when the countermass expands and disintegrates.
- Documents SE 0301626-8 and SE 0301627-6 discloses examples of such countermass containers for weapons.
- one drawback is that when the countermass is a liquid, a cloud is formed around the weapon, which makes it difficult to rapidly achieve a clear view of the target for firing the weapon again.
- Another drawback of using a countermass is that an asymmetrical flow may be created in the countermass container, which can produce great shear forces on the weapon. Also, pieces from the container may come away from the container and constitute a risk behind the weapon.
- the objective problem to be solved by the present invention is to avoid that a liquid cloud is formed around the weapon when the weapon is fired.
- Another objective problem to be solved by the present invention is to reduce the pressure behind a weapon
- Yet another objective problem to be solved by the present invention is to eliminate the need of a countermass in a weapon.
- Yet another objective problem to be solved by the present invention is to reduce the recoil in the forward direction.
- Ambient air is used to reduce the temperature of the hot gases which leaves the rear end of the weapon through the nozzle.
- energy is transformed which reduces also the pressure inside the hot gases. Since the pressure is reduced also the recoil on the weapon is reduced.
- the ambient air is introduced in the hot gases by the means provided at the nozzle.
- said means is a number of third openings arranged in the wall of the nozzle at the area of the second opening.
- ambient air is sucked in through the third openings by the gases that flow through the nozzle.
- the ambient air reduces the temperature of the gases from the projectile.
- the gases within the nozzle are over expanded.
- said means is a spoiler is arranged substantially inside the nozzle in the area of the second opening.
- the spoiler creates a low pressure on one of its surfaces when the gases pass the spoiler. The low pressure reduces the temperature of the gases. Also, the low pressure created by the spoiler leads to that ambient air is sucked in through the second opening of the nozzle and thereby reduces the temperature of the gases from the projectile.
- the gases within the nozzle are under expanded.
- a circumferential element is arranged at the first opening of the nozzle.
- the circumferential element has an opening area which is less than the area of the first opening of the nozzle. The effect achieved by this element is that recoil in the forward direction is reduced when the weapon is fired.
- a weapon with such a nozzle is easy to handle, cost effective when manufacturing and have no problems with shear forces which may occur when using a countermass.
- Fig. 1 shows a section view of a nozzle 1 according to a first embodiment of the invention.
- the nozzle 1 is arranged on a weapon 2, which comprises a launcher 4 which constitutes a guide for a projectile or missile 6.
- the launcher 4 and the projectile 6 are schematically disclosed in the figure.
- the nozzle 1 comprises a circumferential cone shaped wall 8, which defines a first opening 10 and a second opening 12.
- the first opening 10 of the nozzle 1 is connected to the launcher 4.
- the first opening 10 is an interface section or a throat of the nozzle 1 and in this case the interface section is in the substantially same plane as the throat.
- the area of the first opening 10 is smaller than the area of the second opening 12, so that the nozzle has the form of a funnel.
- the first and second openings 10, 12 are substantially cylindrical and are arranged substantially concentric with each others.
- the second opening 2 of the nozzle is an exit section.
- a gas generator 14 is arranged in the area of the first opening 10. When the weapon 2 is fired a pressure is exerted on the gas generator 14 from the projectile 6. The diameter of the gas generator 14 is so dimensioned that the forces from the projectile 6 on the gas generator 14 and the nozzle 1 will reduce the recoil when the weapon 2 is fired.
- the gas generator 14 is attached to the launcher 4 by fastening means (not disclosed).
- the nozzle 1 is provided with means 18 for reducing the pressure of gases 16 from the projectile 6 inside and behind the nozzle 1 when firing the weapon 2. Said means 18 is arranged at the second opening 12 of the nozzle 1.
- said means 18 is a number of third openings 18 arranged in the wall 8 of the nozzle 1 at the area of the second opening 12.
- said third openings 18 are arranged circumferential in a row in the wall 8 of the nozzle 1.
- the area of each third opening 18 is substantially equal and the area of each third opening 18 is essentially smaller than the second opening 12.
- the third openings 18 are so arranged in the wall 8 of the nozzle 1 that a centre axis 20 of each third opening 18 will intersect each other in a common point P, which is indicted in fig. 1 .
- ambient air is sucked in through the third openings 18 by the gases 16 that flow through the nozzle 1.
- the ambient air reduces the temperature of the gases 16 from the projectile 6.
- ambient air is introduced in the hot gases 16, energy is transformed which reduces the pressure inside the hot gases 16. Since the pressure is reduced also the recoil on the weapon 2 is reduced.
- said means 18 is a spoiler 18' arranged substantially inside the nozzle 1 in the area of the second opening 12.
- the spoiler 18' is so arranged inside the nozzle 1 that an opening gap 22 is created between the wall 8 of the nozzle 1 and the spoiler 18'.
- Fig. 4 shows a perspective view of the second embodiment.
- the spoiler 18' has a form which is substantial circular and is connected to the wall 8 by distance elements 24.
- the distance elements 24 have an aerodynamic form that not disturbs the flow of the gases 16.
- the gases 16 from the projectile 6 passes through the nozzle 1 with high velocity.
- the spoiler 18' creates a low pressure on one of its surfaces when the gases 16 pass the spoiler 18', which is indicated in fig 5 .
- the low pressure reduces the temperature of the gases 16 and the low pressure LP created by the spoiler 18' also leads to that ambient air is sucked in through the second opening 12 of the nozzle 1 and thereby reduces the temperature of the gases 16 from the projectile 6.
- a circumferential element 26 is arranged at the first opening 10 of the nozzle 1.
- This circumferential element 26 is disclosed in fig. 1 .
- An opening area 28 of the circumferential element 26 is less than the area of the first opening 10 of nozzle 1.
- a circumferential abutment 30 or edge is created by the element 26.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
- Toys (AREA)
- Surgical Instruments (AREA)
- Percussion Or Vibration Massage (AREA)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE602006010422T DE602006010422D1 (de) | 2006-12-22 | 2006-12-22 | Düse |
ES06126990T ES2333666T3 (es) | 2006-12-22 | 2006-12-22 | Tobera. |
EP06126990A EP1936317B1 (fr) | 2006-12-22 | 2006-12-22 | Buse |
AT06126990T ATE448459T1 (de) | 2006-12-22 | 2006-12-22 | Düse |
US12/003,319 US20100275763A1 (en) | 2006-12-22 | 2007-12-21 | Nozzle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06126990A EP1936317B1 (fr) | 2006-12-22 | 2006-12-22 | Buse |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1936317A1 true EP1936317A1 (fr) | 2008-06-25 |
EP1936317B1 EP1936317B1 (fr) | 2009-11-11 |
Family
ID=38038731
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06126990A Active EP1936317B1 (fr) | 2006-12-22 | 2006-12-22 | Buse |
Country Status (5)
Country | Link |
---|---|
US (1) | US20100275763A1 (fr) |
EP (1) | EP1936317B1 (fr) |
AT (1) | ATE448459T1 (fr) |
DE (1) | DE602006010422D1 (fr) |
ES (1) | ES2333666T3 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3625512A4 (fr) * | 2017-05-17 | 2020-12-09 | Saab Ab | Culasse et procédé de réduction de bruit |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10788284B1 (en) * | 2019-05-09 | 2020-09-29 | The United States Of America As Represented By The Secretary Of The Army | Grounded and vehicular mounted weapons with improved recoil stability |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2557151A (en) * | 1944-08-24 | 1951-06-19 | Leslie A Skinner | Spring actuated generator for rocket launchers |
US2598256A (en) * | 1945-04-21 | 1952-05-27 | Us Sec War | Recoilless gun |
NL6509893A (fr) * | 1964-07-30 | 1966-01-31 | ||
GB1213711A (en) * | 1967-03-16 | 1970-11-25 | Karlsruhe Augsburg Iweka | Improvements in firearms |
DE1678189A1 (de) * | 1968-03-12 | 1972-01-13 | Ludwig Bucklisch | Rueckstossfreie Waffe |
SE0301627L (sv) | 2003-06-05 | 2004-10-19 | Saab Ab | Runt vapen trycksänkande motmassa i motmassebehållare innefattande styrande vikstöd för symmetriskt öppningsförlopp |
SE0301626L (sv) | 2003-06-05 | 2004-12-06 | Saab Ab | Anordning vid vapen innefattande en motmassa för att sänka trycket kring vapnet, varvid motmassans huvudbeståndsdel är vätska som binds och hålls kvar av kapillärkrafter |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE560119A (fr) * | 1956-09-13 | |||
US2956479A (en) * | 1958-02-28 | 1960-10-18 | Musser C Walton | Cascaded gun barrel |
US3035494A (en) * | 1960-01-26 | 1962-05-22 | Musser C Walton | Recoil adjusting device |
US3251552A (en) * | 1963-03-07 | 1966-05-17 | Douglas M Ford | Exhaust nozzle for jet or rocket motors |
DE977818C (de) * | 1963-06-22 | 1970-12-17 | Messerschmitt Boelkow Blohm | Treibladungsanordnung fuer rohrfoermige Abschusseinrichtungen |
US3208384A (en) * | 1964-01-21 | 1965-09-28 | Fountain Gilbert | Rocket thrust neutralizer |
DE1428637C1 (de) * | 1964-02-26 | 1975-02-20 | Messerschmitt Boelkow Blohm | Rohrfoermige Abschusseinrichtung fuer Geschosse,insbesondere fuer Flugkoerper |
SE416230B (sv) * | 1976-05-17 | 1980-12-08 | Bofors Ab | Anordning for rekylfri utskjutning av en missil |
US4043248A (en) * | 1976-06-10 | 1977-08-23 | General Electric Company | Liquid propellant gun (recoilless regenerative piston) |
US4091709A (en) * | 1976-07-26 | 1978-05-30 | The United States Of America As Represented By The Secretary Of The Army | Recoilless rifle nozzle |
US4203347A (en) * | 1978-04-10 | 1980-05-20 | The Boeing Company | Shock suppressing apparatus and method for a rocket launcher |
US4404887A (en) * | 1980-06-23 | 1983-09-20 | General Dynamics, Pomona Division | Recoil reducer |
-
2006
- 2006-12-22 EP EP06126990A patent/EP1936317B1/fr active Active
- 2006-12-22 ES ES06126990T patent/ES2333666T3/es active Active
- 2006-12-22 AT AT06126990T patent/ATE448459T1/de not_active IP Right Cessation
- 2006-12-22 DE DE602006010422T patent/DE602006010422D1/de active Active
-
2007
- 2007-12-21 US US12/003,319 patent/US20100275763A1/en not_active Abandoned
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2557151A (en) * | 1944-08-24 | 1951-06-19 | Leslie A Skinner | Spring actuated generator for rocket launchers |
US2598256A (en) * | 1945-04-21 | 1952-05-27 | Us Sec War | Recoilless gun |
NL6509893A (fr) * | 1964-07-30 | 1966-01-31 | ||
GB1213711A (en) * | 1967-03-16 | 1970-11-25 | Karlsruhe Augsburg Iweka | Improvements in firearms |
DE1678189A1 (de) * | 1968-03-12 | 1972-01-13 | Ludwig Bucklisch | Rueckstossfreie Waffe |
SE0301627L (sv) | 2003-06-05 | 2004-10-19 | Saab Ab | Runt vapen trycksänkande motmassa i motmassebehållare innefattande styrande vikstöd för symmetriskt öppningsförlopp |
SE0301626L (sv) | 2003-06-05 | 2004-12-06 | Saab Ab | Anordning vid vapen innefattande en motmassa för att sänka trycket kring vapnet, varvid motmassans huvudbeståndsdel är vätska som binds och hålls kvar av kapillärkrafter |
EP1484572A1 (fr) * | 2003-06-05 | 2004-12-08 | Saab Ab | Arme à système de contrepoids et dispositif pour sceller le système de contrepoids |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3625512A4 (fr) * | 2017-05-17 | 2020-12-09 | Saab Ab | Culasse et procédé de réduction de bruit |
US11067354B2 (en) | 2017-05-17 | 2021-07-20 | Saab Ab | Breech and method for noise reduction |
Also Published As
Publication number | Publication date |
---|---|
ES2333666T3 (es) | 2010-02-25 |
EP1936317B1 (fr) | 2009-11-11 |
ATE448459T1 (de) | 2009-11-15 |
DE602006010422D1 (de) | 2009-12-24 |
US20100275763A1 (en) | 2010-11-04 |
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