EP0671598A1 - Bourre de cartouche en deux parties avec amortissement pneumatique - Google Patents

Bourre de cartouche en deux parties avec amortissement pneumatique Download PDF

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Publication number
EP0671598A1
EP0671598A1 EP94916989A EP94916989A EP0671598A1 EP 0671598 A1 EP0671598 A1 EP 0671598A1 EP 94916989 A EP94916989 A EP 94916989A EP 94916989 A EP94916989 A EP 94916989A EP 0671598 A1 EP0671598 A1 EP 0671598A1
Authority
EP
European Patent Office
Prior art keywords
wad
damper
case
walls
shot
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.)
Withdrawn
Application number
EP94916989A
Other languages
German (de)
English (en)
Inventor
Pedro Diaz Prieto
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0671598A1 publication Critical patent/EP0671598A1/fr
Withdrawn legal-status Critical Current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
    • F42B7/00—Shotgun ammunition
    • F42B7/02—Cartridges, i.e. cases with propellant charge and missile
    • F42B7/08—Wads, i.e. projectile or shot carrying devices, therefor

Definitions

  • the object of this application for an Invention Patent is a two-element wad with pneumatic damping, which presents a series of advantages and novelties when compared with the wads currently used in the cartridge sector.
  • wads are usually manufactured from a single piece of deformable material, due to the need to protect the barrel of the gun against the leading or copperizing derived from repeated shots and the enhancement of the pattern and the complete plugging of gases created during the combustion of powder.
  • the two-element wad with pneumatic damping which is the object of this Invention is composed of two interchangeable elements which are joined each other, the case and the damper-shutter.
  • the case incorporates a series of bendable flaps and a damping regulating and air-injecting valve. Both the case and the damper present a series of cross-section walls of a convexo-concave shape, able to absorb radial deformations with respect to the symmetry axis of the wad.
  • the damper has a four-fold action; it stands the bending and deformation of the material, the friction against the barrel and the compression of the air contained.
  • Figure 1 shows a side sectional view of a preferred execution of the invention.
  • Figure 2 shows two dihedric views (plan view and side section) of the case.
  • Figure 3 shows two dihedric views (plan view and side section) of the damper-shutter.
  • Figures 4, 5 and 6 show a series of figures analogous to those of the above figures 1, 2 and 3, according to another alternative of execution of the invention.
  • the case (1) is characterized because it shows a cylindrical external appearance, with a series of flaps (7) connected to it by its lower part while, in turn, the walls (3) present a series of bores which serve to house such flaps (7).
  • the case (1) presents smooth inner walls of a trunco-conical shape open outwards.
  • the bottom or base (4) presents a trunco-conical convex shape, ended in a circular ring which is the base of the case itself, where, in turn, the inner walls end.
  • the lower area of the case presents at the foremost part a ring-shape groove which serves to connect the damper-shutter (8), while the central area presents a trunco-conical concave shape.
  • the central area of the base or wall which serves as the bottom of it (4) houses a valve (2) formed by two non-passing holes coinciding with a thin membrane (5) made of the same material as the case.
  • the upper hole of the valve can have a cylindrical or prismatic shape, while the lower one can be trunco-conical or of a similar shape.
  • the dimensions and the thickness of the membrane can vary depending on the needs.
  • the membrane can be replaced by a cap able to slide throughout the seat forced by the pressure, and acting similarly to the membrane, or even by a hole regulating the air throttle as needed.
  • the damper-shutter (8) presents a vase-shape external appearance, with a chamber delimited by bellow-shaped walls (9) or originated by a sinusoidal curve, with slightly rounded inflections. Such wall (9) is supported onto a cross-sectional wall (12) which acts as closure or base of the bellow which, in turn, has a convex-shaped bottom formed by two trunco-conical shapes (11) and (13) connected each other.
  • the same wall (12) has a concave-shaped bottom formed by the two trunco-conical shapes (11) and (13) connected each other.
  • the upper part or edge (10) of the damper (8) incorporates a ring-shaped groove.
  • the groove has a double-lip edge to provide a better water-tightness when supported on a flat surface.
  • there is a ring-shaped rib which matches the case (1) thus preventing that once the damper (8) and the case (1) have been connected, they can be easily detached.
  • This invention has tried to solve all the inconveniences presented by current wads.
  • a two-element wad has been selected, and both elements will be manufactured by injection or blowing, and will be made of plastic or non-rigid or semi-rigid material.
  • the side flaps When the wad is introduced into the cardboard case, the side flaps will be folded inside their housing, remaining in this condition until the wad comes out from the gun. Then they will unfold to serve as stabilizers and brakes.
  • the damper When the wad is located inside the case and resting against the powder charge, the damper will be flexed and the air inside the cartridge will be compressed (such compression being determined by the length of the damper bellow). In this position, the wad receives the small-shot charge on its upper part, and it will be ready to be shot.
  • the damper when the gun is shot the damper will work by flexing the material of its walls (bellow) along with the friction produced against the walls of the case or the gun.
  • the bellow of the damper When the bellow of the damper is completely folded, the convex cone of the base of the damper will push the folded walls against the concave cone of the wall of the case which produces a deformation until it adapts to the shape of both cones. Then, the air contained and compressed in the chamber (6) will have reached the necessary pressure to open the valve (2) expelling a jet of compressed air which will impel the small-shot charge recovering part of the energy used for the damping and converting it into a useful impulse for the shot.
  • this valve will use part of the energy accumulated during the damping to impulse the small-shot charge and, furthermore, it will permit the wad to pass through the gun throttle as the internal resistance to compression decreases. Since the cross-sectional wall of the case and the closing wall of the damper have a convex-concave shape, they enable to absorb radial contractions to the symmetry axis of the wad thus making the passing of the wad with the small-shot charge through the throttle being smooth and even. Furthermore, the valve (2) can act either instantaneously or in a progressive way depending on the needs, by simply varying the opening pressure of the valve or the section of the air hole.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Buffer Packaging (AREA)
  • Nozzles (AREA)
  • Air-Flow Control Members (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Packaging For Recording Disks (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
EP94916989A 1993-06-04 1994-06-01 Bourre de cartouche en deux parties avec amortissement pneumatique Withdrawn EP0671598A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ES9301229A ES2076081B1 (es) 1993-06-04 1993-06-04 Taco para cartucho en dos piezas con amortiguacion neumatica.
ES9301229 1993-06-04
PCT/ES1994/000053 WO1994029666A1 (fr) 1993-06-04 1994-06-01 Bourre de cartouche en deux parties avec amortissement pneumatique

Publications (1)

Publication Number Publication Date
EP0671598A1 true EP0671598A1 (fr) 1995-09-13

Family

ID=8282068

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94916989A Withdrawn EP0671598A1 (fr) 1993-06-04 1994-06-01 Bourre de cartouche en deux parties avec amortissement pneumatique

Country Status (7)

Country Link
EP (1) EP0671598A1 (fr)
JP (1) JPH07509775A (fr)
CN (1) CN1110485A (fr)
AU (1) AU6845194A (fr)
CA (1) CA2140913A1 (fr)
ES (1) ES2076081B1 (fr)
WO (1) WO1994029666A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2887004A1 (fr) * 2013-12-20 2015-06-24 R.A. Brands, L.L.C. Bourre pour conteneur à plombs

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10850584B2 (en) * 2016-06-07 2020-12-01 Beijingwest Industries Co., Ltd. Damper housing and a method for manufacturing the damper housing

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE171410C (fr) *
AU422052B2 (en) * 1966-11-28 1972-03-03 Wad column
US3289586A (en) * 1964-11-09 1966-12-06 Fed Cartridge Corp Wad column
DE6605055U (de) * 1966-01-26 1970-04-02 Hirtenberger Patronen Zwischenpropfen aus kunststoff fuer schrotpatronen
FR1582956A (fr) * 1968-08-27 1969-10-10
FR2070268A6 (fr) * 1969-11-07 1971-09-10 Delage Beaudeuf Joseph
ES157781Y (es) * 1970-04-20 1971-03-16 Angulo Egana Taco perfeccionado para la carga de cartuchos para la caza.
ES167111Y (es) * 1971-03-18 1972-02-16 Bernard Lajus Taco para cartuchos de caza.
FR2343219A1 (fr) * 1976-03-03 1977-09-30 Piegay Marcel Bourre perfectionnee, notamment pour munitions de chasse
US4220090A (en) * 1978-09-05 1980-09-02 Fackler David G Shot wad column
ES296581Y (es) * 1985-03-25 1989-07-01 Piegay Marcel Tapon para cartucho de escopeta de caza y otras armas de fuego

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9429666A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2887004A1 (fr) * 2013-12-20 2015-06-24 R.A. Brands, L.L.C. Bourre pour conteneur à plombs
US9778002B2 (en) 2013-12-20 2017-10-03 Ra Brands, L.L.C. Shot cup wad

Also Published As

Publication number Publication date
JPH07509775A (ja) 1995-10-26
CN1110485A (zh) 1995-10-18
CA2140913A1 (fr) 1994-12-05
WO1994029666A1 (fr) 1994-12-22
ES2076081B1 (es) 1998-07-01
AU6845194A (en) 1995-01-03
ES2076081R (fr) 1997-10-16
ES2076081A2 (es) 1995-10-16

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