EP0147314A2 - Kunststoffbodenkörper - Google Patents

Kunststoffbodenkörper Download PDF

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Publication number
EP0147314A2
EP0147314A2 EP84402665A EP84402665A EP0147314A2 EP 0147314 A2 EP0147314 A2 EP 0147314A2 EP 84402665 A EP84402665 A EP 84402665A EP 84402665 A EP84402665 A EP 84402665A EP 0147314 A2 EP0147314 A2 EP 0147314A2
Authority
EP
European Patent Office
Prior art keywords
base
ammunition
case
obturating
combustible
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
Application number
EP84402665A
Other languages
English (en)
French (fr)
Other versions
EP0147314B1 (de
EP0147314A3 (en
Inventor
Pierre Moreau
Jean Claude Sauvestre
Patrick Montier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giat Industries SA
Original Assignee
Giat Industries SA
Delegation Generale pour lArmement
Gouvernement de la Republique Francaise
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9295427&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0147314(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Giat Industries SA, Delegation Generale pour lArmement, Gouvernement de la Republique Francaise filed Critical Giat Industries SA
Priority to AT84402665T priority Critical patent/ATE34837T1/de
Publication of EP0147314A2 publication Critical patent/EP0147314A2/de
Publication of EP0147314A3 publication Critical patent/EP0147314A3/fr
Application granted granted Critical
Publication of EP0147314B1 publication Critical patent/EP0147314B1/de
Expired legal-status Critical Current

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Classifications

    • 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
    • F42B5/18—Caseless ammunition; Cartridges having combustible cases
    • F42B5/181—Caseless ammunition; Cartridges having combustible cases consisting of a combustible casing wall and a metal base; Connectors therefor
    • 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
    • F42B5/18—Caseless ammunition; Cartridges having combustible cases
    • 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
    • F42B5/26—Cartridge cases
    • F42B5/30—Cartridge cases of plastics, i.e. the cartridge-case tube is of plastics

Definitions

  • the technical sector of the present invention is that of medium or large caliber ammunition, and more precisely ammunition casings.
  • the metal bush constitutes a reservoir of harmful gases which it carries into the turret after ej ec t ion.
  • the shutter base As for the shutter base, it also has two specific drawbacks. In fact, it has been found that the metallic shutter caps have poor leaktightness at low pressure level, which necessitates the provision of additional leaktightness devices to obtain inside the socket sufficient pressure for the proper functioning of the ammunition. .
  • patent FR 2365096 presents, for a metal base, a rubber or silicone seal fitted on an annular bead of the base.
  • Patent FR 2380531 shows a seal having a lip making it possible to use the gas streams by converting them into a radial pressure ensuring tightness.
  • Patent FR 2218547 shows a base for a fuel socket ensuring a sealing function with respect to the wall of the barrel by means of rubber seals which are expandable under the effect of the gas pressure which is established inside the socket.
  • the object of the present invention is to overcome the aforementioned drawbacks by producing obturating caps of reduced mass correctly ensuring a sealing function at low pressure level without additional device or with a device very clearly simplified, using for this purpose the capacities deformation of the material used.
  • Another object of the invention is to provide a particular embodiment of a shutter base made of non-metallic material for large caliber ammunition making it possible to guarantee leaktightness in the range of pressure levels used in medium and large ammunition. caliber.
  • Another object of the invention is to produce sockets or obturating caps ensuring better mechanical resistance to environmental stresses than the devices currently used.
  • Another object is to improve the connection between the shutter base and the combustible case.
  • the invention also aims to obtain reduced manufacturing costs in large series.
  • the invention relates to a shutter base for medium or large caliber ammunition, base having a tubular part integral with the ammunition case and a circular rear flange carrying an axial bore intended for placing in place of a primer holder tube.
  • the cap according to the invention has the particularity of being made of a non-metallic material having a modulus of elasticity of between 1000 and 10,000 HPascal and of having a section from the front of the tubular part bevelled from the inside towards the outside to allow a radial deformation ensuring the tightness of the ammunition in the tube at low pressure level.
  • the base When the base is used in combination with a combustible case, it may include between the tubular part and the case a foam gasket loaded with combustible material.
  • the base according to the invention may comprise a metal insert comprising a rear pad and a tubular part of small section.
  • the base according to the invention must carry an electrical primer, provision may be made for the non-metallic material of the base to be charged with a material conducting the electric current to ensure the electrical connection between the electrical primer and the obturating base.
  • the base according to the invention comprises a tubular part 1 intended to allow the base to be secured to the case of the ammunition and to achieve the sealing function fulfilled by the invention, and a circular rear flange. 2 comprising a shoulder 3 intended to come to bear on the rear of the barrel of the weapon.
  • the flange 2 has in its center a threaded axial bore 4 intended for the installation of a primer holder tube of conventional type.
  • the base is made of a non-metallic material having a modulus of elasticity of between 1000 MPascal and 10,000 MPascal.
  • the base can thus be made of a plastic material such as polyester, polyvinyl chloride or polyethylene.
  • the section of the tubular part 1 decreases from the flange 2 to its free front end and, ends with a bevel 5 made from the inside towards the outside, this arrangement allowing a radial deformation towards the outside under the effect of the removal without the shell of the ammunition during firing in order to ensure the tightness of the ammunition at low pressure level.
  • FIG. 3 shows an alternative embodiment according to which the shutter base made of non-metallic material comprises a metal insert intended to obtain good mechanical strength of the base and to control the radial elastic deformation of the latter during firing.
  • This insert comprises a rear pellet 6 with a diameter slightly greater than the caliber of the ammunition so that the pellet 6 projects beyond the inside of the shoulder 3 to ensure its rigidity.
  • This pellet 6 is integral with a tubular part of small section 7 which penetrates inside the tubular part 1 of the cap and whose free end is located at the base of the bevel 5 of the cap. Obtaining a base comprising such an insert can be achieved by overmolding the non-metallic material on the insert.
  • Figures 4 and 5 are shown two means of connecting the base on a possibly combustible case.
  • the case is assembled by gluing on the internal part 8 of the tubular part 1 of the base.
  • the internal part 8 has the shape of an annular bowl on which rests an annular rounding 9 of the rear part of the case 10.
  • the assembly only includes a bonding on the part internal 8 of the base and not on the bevel 5 so as not to oppose the radial deformation of the base during firing.
  • a foam 11 comprising a binder loaded with combustible material.
  • the elasticity of the foam is determined by the rate of loading of combustible material, which allows perfect control of the coupling of the base and the case.
  • Such an assembly is very favorable to the holding of the ammunition; especially during environmental testing.
  • Figures 6 and 7 show a variant of ammunition in which the complete socket was made in a single piece of non-metallic material. without metal insert (figure 6) or with insert (figure 7).
  • the sealing problem at low pressure level is solved in the same way as for a base and case munition as shown above, by the radial deformation of the sleeve allowed by the elasticity characteristics of the non-metallic material chosen.
  • the electrical connection can be made, either by a metallic ground connection, or preferably by adding conductive material to the mass of the non-metallic material of the base.
  • the invention has the advantage of ensuring a more secure connection between the shutter base and the combustible case of the ammunition and of greatly improving the seal at very low pressure level in the gun barrel.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Laminated Bodies (AREA)
  • Gasket Seals (AREA)
  • Adornments (AREA)
  • Powder Metallurgy (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Forging (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
  • Installation Of Indoor Wiring (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
EP84402665A 1983-12-22 1984-12-20 Kunststoffbodenkörper Expired EP0147314B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84402665T ATE34837T1 (de) 1983-12-22 1984-12-20 Kunststoffbodenkoerper.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8320532A FR2557285B1 (fr) 1983-12-22 1983-12-22 Culot obturateur en materiau non metallique
FR8320532 1983-12-22

Publications (3)

Publication Number Publication Date
EP0147314A2 true EP0147314A2 (de) 1985-07-03
EP0147314A3 EP0147314A3 (en) 1985-08-07
EP0147314B1 EP0147314B1 (de) 1988-06-01

Family

ID=9295427

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84402665A Expired EP0147314B1 (de) 1983-12-22 1984-12-20 Kunststoffbodenkörper

Country Status (6)

Country Link
EP (1) EP0147314B1 (de)
AT (1) ATE34837T1 (de)
DE (1) DE3471740D1 (de)
ES (1) ES295770Y (de)
FR (1) FR2557285B1 (de)
NO (1) NO157633C (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020001052A1 (de) 2020-02-19 2021-08-19 Nitrochemie Aschau Gmbh Hülsenmantel

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4229559C2 (de) * 1992-09-04 2000-12-07 Rheinmetall W & M Gmbh Hülsenboden für großkalibrige Munition

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR328008A (fr) 1902-06-27 1903-08-28 Barrallon Antony étui de cartouche en matière plastique pour toutes armes
US2564695A (en) 1949-01-13 1951-08-21 Jr Arthur C Johnson Plastic cartridge case and method of making same
FR1294551A (fr) 1961-07-08 1962-05-26 Ici Ltd Perfectionnements aux cartouches pour fusils de chasse
FR2218547A1 (de) 1973-02-17 1974-09-13 Rheinmetall Gmbh
FR2365096A1 (fr) 1976-09-16 1978-04-14 Rheinmetall Gmbh Douille pour charge propulsive
FR2380531A1 (fr) 1977-02-09 1978-09-08 Rheinmetall Gmbh Procede pour realiser le contact etanche d'un culot pour douille combustible avec la paroi du canon, et etancheite realisee sur un culot selon ce procede
WO1983000213A1 (en) 1981-07-06 1983-01-20 Palcher, Joseph, J. Ammunition casing and bullet

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1028910B (de) * 1957-06-25 1958-04-24 Ver Deutsche Metallwerke Ag Patronenhuelse aus Kunststoff
FR1442932A (fr) * 1964-08-12 1966-06-17 Mueanyagipari Ki Douilles de cartouches en matière plastique
DE1578234A1 (de) * 1965-05-05 1971-01-07 Smith And Wesson Inc Elektrisches Gewehr und dafuer geeignete Munition
FR1489207A (fr) * 1966-06-09 1967-07-21 Douille de chasse
US3429260A (en) * 1967-02-13 1969-02-25 Sidney A Corren Miniature initiator for electroexploding device
US3705549A (en) * 1970-11-25 1972-12-12 Us Army Ammunition
US3760729A (en) * 1971-12-21 1973-09-25 Us Army Hermetically sealed plastic cartridge case/cap system
FR2287324A1 (fr) * 1974-10-07 1976-05-07 Philippe Josette Procede de fabrication d'une cartouche de chasse
US4147107A (en) * 1976-02-17 1979-04-03 Kupag Kunststoff-Patent-Verwaltungs Ag Ammunition cartridge
FR2376395A1 (fr) * 1976-12-29 1978-07-28 Olivie Maitena Douille de matiere plastique pour cartouches de chasse
BE859068A (fr) * 1977-09-27 1978-03-28 Herstal Sa Douille pour cartouche de chasse en matiere synthetique

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR328008A (fr) 1902-06-27 1903-08-28 Barrallon Antony étui de cartouche en matière plastique pour toutes armes
US2564695A (en) 1949-01-13 1951-08-21 Jr Arthur C Johnson Plastic cartridge case and method of making same
FR1294551A (fr) 1961-07-08 1962-05-26 Ici Ltd Perfectionnements aux cartouches pour fusils de chasse
FR2218547A1 (de) 1973-02-17 1974-09-13 Rheinmetall Gmbh
FR2365096A1 (fr) 1976-09-16 1978-04-14 Rheinmetall Gmbh Douille pour charge propulsive
FR2380531A1 (fr) 1977-02-09 1978-09-08 Rheinmetall Gmbh Procede pour realiser le contact etanche d'un culot pour douille combustible avec la paroi du canon, et etancheite realisee sur un culot selon ce procede
WO1983000213A1 (en) 1981-07-06 1983-01-20 Palcher, Joseph, J. Ammunition casing and bullet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020001052A1 (de) 2020-02-19 2021-08-19 Nitrochemie Aschau Gmbh Hülsenmantel

Also Published As

Publication number Publication date
EP0147314B1 (de) 1988-06-01
ES295770U (es) 1987-04-16
FR2557285B1 (fr) 1986-12-19
EP0147314A3 (en) 1985-08-07
ATE34837T1 (de) 1988-06-15
ES295770Y (es) 1987-12-01
NO157633B (no) 1988-01-11
NO845200L (no) 1985-06-24
FR2557285A1 (fr) 1985-06-28
NO157633C (no) 1988-04-20
DE3471740D1 (en) 1988-07-07

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