EP3948145A2 - Valve sheath for ct40 cannon - Google Patents
Valve sheath for ct40 cannonInfo
- Publication number
- EP3948145A2 EP3948145A2 EP20733523.3A EP20733523A EP3948145A2 EP 3948145 A2 EP3948145 A2 EP 3948145A2 EP 20733523 A EP20733523 A EP 20733523A EP 3948145 A2 EP3948145 A2 EP 3948145A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- striker
- valve sleeve
- assembly
- sleeve
- 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
- 238000010304 firing Methods 0.000 claims abstract description 26
- 238000005474 detonation Methods 0.000 claims abstract description 20
- 101000674717 Homo sapiens Transcription initiation factor TFIID subunit 7-like Proteins 0.000 claims description 8
- 102100021172 Transcription initiation factor TFIID subunit 7-like Human genes 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 2
- 239000003380 propellant Substances 0.000 description 6
- 238000009527 percussion Methods 0.000 description 4
- NIOPZPCMRQGZCE-WEVVVXLNSA-N 2,4-dinitro-6-(octan-2-yl)phenyl (E)-but-2-enoate Chemical compound CCCCCCC(C)C1=CC([N+]([O-])=O)=CC([N+]([O-])=O)=C1OC(=O)\C=C\C NIOPZPCMRQGZCE-WEVVVXLNSA-N 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
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
- F41A19/00—Firing or trigger mechanisms; Cocking mechanisms
- F41A19/06—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms
- F41A19/25—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins
- F41A19/27—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins the percussion or firing pin being movable relative to the breech-block
-
- 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
- F41A19/00—Firing or trigger mechanisms; Cocking mechanisms
- F41A19/06—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms
- F41A19/25—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins
- F41A19/27—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins the percussion or firing pin being movable relative to the breech-block
- F41A19/29—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins the percussion or firing pin being movable relative to the breech-block propelled by a spring under tension
- F41A19/36—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins the percussion or firing pin being movable relative to the breech-block propelled by a spring under tension in block-action guns
-
- 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
- F41A19/00—Firing or trigger mechanisms; Cocking mechanisms
- F41A19/06—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms
- F41A19/13—Percussion or firing pins, i.e. fixed or slidably-mounted striker elements; Mountings therefor
-
- 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
- F41A19/00—Firing or trigger mechanisms; Cocking mechanisms
- F41A19/06—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms
- F41A19/42—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having at least one hammer
- F41A19/43—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having at least one hammer in bolt-action guns
-
- 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
- F41A19/00—Firing or trigger mechanisms; Cocking mechanisms
- F41A19/06—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms
- F41A19/42—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having at least one hammer
- F41A19/49—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having at least one hammer in block-action guns
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
- F42B5/02—Cartridges, i.e. cases with charge and missile
- F42B5/045—Cartridges, i.e. cases with charge and missile of telescopic type
Definitions
- VALVE HOLDER FOR CT40 CANNON The technical sector of the present invention is that of strikers for large and medium caliber firearms, in particular tank turret guns, and in particular for the CT40 gun.
- the CT40 cannon uses a particular type of ammunition: telescoped ammunition. These ammunition, the structure of which is known, have the particularity that the projectile is included in the case and does not protrude from it at the front end. There are different types, and the CT40 gun can use a variety of different types, such as anti-tank, explosive or exercise ammunition.
- the CT40 gun among the elements which compose it, has a particular part, the valve sleeve, which provides mechanical support for the firing pin when the telescoped munition is fired.
- valve sleeve In this known version of the valve sleeve, the latter worked in cooperation with the detonation assembly.
- the striker is there integral with the telescopic detonation assembly and the valve sleeve has a central longitudinal recess in which the striker slides.
- the valve sleeve thus ensures the correct positioning of the striker and, by sliding its front part, the mechanical support necessary for the successful detonation.
- valve sleeve gives the CT40 gun proven efficiency and reliability, but it also imposes a constraint. Indeed, if the gunner forgets to install the valve sleeve in the tube, the barrel may experience a firing failure. In order to remedy these risks, the present invention provides a novel valve sleeve preventing such firing failures.
- the subject of the invention is therefore a valve sleeve for the CT40 gun operating in association with a detonation assembly, characterized in that said valve sleeve comprises receiving means for providing mechanical support for the barrel firing pin during shooting events.
- the barrel striker is coupled to said valve sleeve and is movable in translation with respect to the latter.
- the receiving means consist of a striker sleeve body of substantially cylindrical shape, a striker valve and a striker assembly inserted in said cylindrical barrel body and the striker inserted both in the valve and the striker assembly, these means being of revolution.
- a ring is interposed between the valve and the striker assembly, said ring being connected to the valve by a cylindrical pin and being able to slide relative to the valve.
- the sleeve comprises a spring inserted in a cage delimited by this sleeve and is placed in abutment against the ring, said spring being intended to return the valve to its initial rest position.
- the spring is compressed by the ring during the translational movement of the firing pin assembly.
- the striker assembly is held in position by means of a plug and an elastic ring.
- the sleeve is manufactured in a steel type material with high mechanical characteristics resistant to heat and pressure.
- valve sleeve according to the invention lies in the fact that it is impossible to fire if said sleeve is not inserted into the barrel. It therefore provides infallible mechanical support for the striker during firing.
- FIG 1 is a longitudinal section of the valve sleeve according to the invention.
- FIG 2 is a view of the valve sleeve integrated with the percussion plate, associated with the detonation assembly, in cross section, in the rest position,
- FIG 3 is a view of the valve sleeve, associated with the detonation assembly, in cross section, in the armed position, and
- FIG 4 is a view of the valve sleeve, associated with the detonation assembly, in cross section, in the detonation position.
- valve sleeve 1 in the form of a solid part 2 machined and enclosing from front to rear a valve 3 firing pin, a spring guide 5 and a striker assembly 7, these different elements being movable inside the sleeve 1 as will be explained below.
- This figure represents the rest or inactive position of the percussion assembly.
- the striker valve 3 comprises a first shoulder 20 cooperating with a complementary shoulder of the sleeve 1 held together in constant support by means of a spring 4 in the rest position in the figure.
- This spring 4 partially surrounds the valve 3 and is housed in a cage 101 delimited by the sheath 1.
- the spring guide 5 is in the form of a ring bearing on one side on the free end of the spring 4 and on the other on the striker assembly 7.
- the spring guide 5 is held in position. by a cylindrical pin 6 in relation to the valve 3.
- the striker assembly 7 is held in place inside the sleeve 1 by a plug 8 and an elastic ring 9. This assembly 7 has a free end 21 projecting from the sleeve 1.
- the striker 10 is coupled to the sleeve by being integrated into the latter.
- This striker 10 is disposed in a housing provided both in the valve 3 and the striker assembly 7 while being held tight in this housing and in abutment in the striker assembly.
- the striker 10 is slightly set back with respect to the front end of the valve 3 and that the valve 3 is separated from the striker assembly 7 by the free space 23.
- valve sleeve 1 is housed in the barrel in order to ensure the percussion of the ammunition and is actuated using a detonation assembly.
- FIGS 2, 3 and 4 illustrate in detail the operation of the valve sleeve according to the invention.
- valve sleeve 1 is in relation to the detonation assembly 11 which is a conventional telescopic striker known in the prior art and which need not be described in detail. These two elements are in the rest position. It may be noted that this assembly 11 comprises in particular a spring 14, a propellant body 15 provided with protuberances 16, 17 cooperating with grooves 18, 19 make it possible to lock the propellant body 15 in position.
- valve sleeve 1 is inserted into the barrel of the weapon 12 and opens out at the level of the free end of the firing pin 10 into the detonation chamber 13 shown in a simplified manner. The ammunition is not shown.
- the striker 10 is fully inserted into the body of the sheath 2 and does not protrude forward in the direction of the ammunition to be detonated.
- the spring 4 is relaxed while maintaining the valve 3 in intimate contact with the sleeve 2 at the level of the shoulder 20.
- the free end 21 of the striker assembly 7 protrudes from the body 2 and is disposed opposite the assembly of detonation 11.
- Figure 3 illustrates the first step of a firing event, the first step of arming the firing device.
- the valve sleeve 1 according to the invention remains in this figure in the rest state.
- the detonation assembly 11 is brought into the armed position by a recoil.
- the spring 14 is then compressed by the recoil of the propellant body 15.
- the protuberances 16, 17 of the propellant body 15, in combination with the grooves 18, 19, make it possible to lock the propellant body 15 in the armed position.
- FIG. 4 the instant of percussion has been shown, with the most advanced position of the valve 3 under the impulse of the detonation assembly 11 according to the arrow F.
- the detonation assembly 11 is released from its rear locked position shown in FIG. 3 and strikes the striker assembly 7 which in turn pushes the valve 3 in translation.
- the spring 14 is released and projects the propellant body 15 to drive the striker assembly 7.
- the striker assembly 7 is then translated into the body of the sleeve 2 and compresses the valve spring 4 until it comes into contact with said valve 3, which propels the valve of the striker 3 towards the forward, in a translational movement and erases the space 23 shown in Figure 1.
- the striker 10 benefits from constant mechanical support throughout its movement in the body of the valve sleeve 1 according to the invention.
- the positions of the start and end of movement of the striker 10 are perfectly known and ensured.
- the striker 10 can in no case deviate from its trajectory and avoid the initiation of the ammunition, which would cause a defective firing or a dangerous detonation.
- the firing pin 10 being an integral part of the body of the valve sleeve 1, the weapon cannot be used without this element. The possibility that the gun servant forgets to place the valve sleeve before firing is thus rendered impossible.
- the striker 10 cannot deviate from the optimal rectilinear trajectory and no faulty firing event can occur.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Portable Nailing Machines And Staplers (AREA)
- Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
- Taps Or Cocks (AREA)
- Automatic Assembly (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Toys (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1903405A FR3094472B1 (en) | 2019-03-29 | 2019-03-29 | Valve sleeve for CT40 cannon |
PCT/EP2020/000089 WO2020200511A2 (en) | 2019-03-29 | 2020-04-30 | Valve sheath for ct40 cannon |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3948145A2 true EP3948145A2 (en) | 2022-02-09 |
EP3948145C0 EP3948145C0 (en) | 2023-06-21 |
EP3948145B1 EP3948145B1 (en) | 2023-06-21 |
Family
ID=67262694
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20733523.3A Active EP3948145B1 (en) | 2019-03-29 | 2020-04-30 | Valve sheath for ct40 cannon |
Country Status (5)
Country | Link |
---|---|
US (1) | US11614295B2 (en) |
EP (1) | EP3948145B1 (en) |
KR (1) | KR20220162602A (en) |
FR (1) | FR3094472B1 (en) |
WO (1) | WO2020200511A2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CZ2020193A3 (en) * | 2020-04-03 | 2021-05-26 | Česká Zbrojovka A.S. | Assembly of hammer automatic system of the gun |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US381264A (en) * | 1888-04-17 | Wilhelm loeenz | ||
US824130A (en) * | 1905-07-12 | 1906-06-26 | Bethlehem Steel Corp | Firing mechanism of guns. |
US2382225A (en) * | 1942-12-08 | 1945-08-14 | Amalgamated Ordnance & Ammunit | Ordnance |
US4581836A (en) * | 1983-07-25 | 1986-04-15 | Bangor Punta Corporation | Firing pin and firing pin-bushing assembly |
FR2678057B1 (en) | 1991-06-18 | 1995-02-17 | Giat Ind Sa | PERCUSSION DEVICE FOR A FIREARMS. |
FR2714161B1 (en) | 1993-12-21 | 1996-02-09 | Giat Ind Sa | Improved percussion device for a firearm. |
DE102005012284A1 (en) * | 2005-02-03 | 2006-08-10 | Diehl Bgt Defence Gmbh & Co. Kg | Mechanical initiation system for caseless ammunition |
US7555977B2 (en) * | 2005-09-23 | 2009-07-07 | Bae Systems Land & Armaments L.P. | Firing pin and valve assembly |
-
2019
- 2019-03-29 FR FR1903405A patent/FR3094472B1/en active Active
-
2020
- 2020-04-30 EP EP20733523.3A patent/EP3948145B1/en active Active
- 2020-04-30 KR KR1020217031347A patent/KR20220162602A/en unknown
- 2020-04-30 WO PCT/EP2020/000089 patent/WO2020200511A2/en unknown
- 2020-04-30 US US17/599,928 patent/US11614295B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
FR3094472A1 (en) | 2020-10-02 |
EP3948145C0 (en) | 2023-06-21 |
WO2020200511A3 (en) | 2021-12-16 |
FR3094472B1 (en) | 2023-05-26 |
US11614295B2 (en) | 2023-03-28 |
KR20220162602A (en) | 2022-12-08 |
WO2020200511A2 (en) | 2020-10-08 |
US20220011069A1 (en) | 2022-01-13 |
EP3948145B1 (en) | 2023-06-21 |
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