EP3211360A1 - Shell case sealing system in a historical percussion firearm - Google Patents

Shell case sealing system in a historical percussion firearm Download PDF

Info

Publication number
EP3211360A1
EP3211360A1 EP16460007.4A EP16460007A EP3211360A1 EP 3211360 A1 EP3211360 A1 EP 3211360A1 EP 16460007 A EP16460007 A EP 16460007A EP 3211360 A1 EP3211360 A1 EP 3211360A1
Authority
EP
European Patent Office
Prior art keywords
shell case
hole
historical
return valve
sealing
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
EP16460007.4A
Other languages
German (de)
French (fr)
Other versions
EP3211360B1 (en
Inventor
Gregorz BOCZKOWSKI
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.)
PH Michal Kuropatwa
P H Michal Kuropatwa
Original Assignee
PH Michal Kuropatwa
P H Michal Kuropatwa
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 PH Michal Kuropatwa, P H Michal Kuropatwa filed Critical PH Michal Kuropatwa
Priority to PL16460007T priority Critical patent/PL3211360T3/en
Priority to EP16460007.4A priority patent/EP3211360B1/en
Publication of EP3211360A1 publication Critical patent/EP3211360A1/en
Application granted granted Critical
Publication of EP3211360B1 publication Critical patent/EP3211360B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F42B5/26—Cartridge cases

Definitions

  • the subject of the invention is sealing of a shell case in a historical firearm with percussion ignition system.
  • a bullet is fired by means of a percussion cap, which produces gases that are getting through a hole to an inside of a shell case.
  • the purpose of the invention is to develop the system of shell case sealing in a way to eliminate the defects of the known solutions.
  • fig. 1 is showing in axial section the end of a shell case with visible notches, which are part of shell case sealing
  • fig. 2 is showing the same end of shell case from fig. 1 but in a rear view
  • fig. 3 same end of shell case with fixed return valve in a cross section, in a position before percussion cap explosion
  • fig. 4 same end of shell case from fig. 3 in a position after firing the black powder charge.
  • the sealing shown on four figures according to invention, consists of system solution made of a rear part 6 of a shell case 5 and return valve 1, which is put in a recess of rear part 6 of a shell case 5.
  • return valve 1 In a hole 9 of rear part 6 of a shell case 5 are located angle notches 7 around flash hole 9 for gases ( fig.1 ). These notches are conical and positioned symmetrically versus shell case axis ( fig. 2 ).
  • the return valve which consists of bushing 2 and ball 3 is a reusable component and according to results of carried tests its wear could not be seen after firing 500 shots.
  • the second part of the sealing according to invention is return valve 1, which is a cylinder bushing 2 with a hole 10 and inner cut out 4 of cone-shape ( fig. 3 and 4 ), with added sliding ball 3.
  • the bullet placed in a firearm is fired by means of a percussion cap(not visualized on figure) at the left side of a shell case 5 ( fig. 3 ), of which gases are penetrating through a hole 10 in a bushing 2 of a return valve 1 of sealing and acting on ball 3, they are causing it to lean on hole 9 of a shell case. Then gases are penetrating deeper into inside of a shell case through notches 7, initiating ignition of the charge in a shell case ( fig. 3 ).
  • the conical surface of inner cut out 4 of bushing 2 has an extra cylindrical cut out 8, which causes further stuck of ball 3 in a bushing 4 ( fig. 4 ).

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Safety Valves (AREA)
  • Taps Or Cocks (AREA)

Abstract

The subject of invention is the shell case sealing in a historical percussion firearm, with return valve in a rear part of a shell case, characterized in that it is a reusable return valve (1) sliding in a recess of a rear part (6) of a shell case (5), which is a cylindrical bushing (2) with a hole (10) and inner cut out (4) of conical shape with added sliding ball (3) to inside, wherein the hole (9) operating with a ball (3) is bearing the notches (7), positioned symmetrically versus axis of a shell casing.

Description

  • The subject of the invention is sealing of a shell case in a historical firearm with percussion ignition system.
  • A bullet is fired by means of a percussion cap, which produces gases that are getting through a hole to an inside of a shell case.
  • There are known systems of the gun-lock / shell case sealig, manufactured by Sharps-doctor company under the name of HYDRAsystem, which are equipped with special flash channels.
  • Disadvantage of this solution is back-blow of gunpowder gases, which is leaving black powder residue on a gun-lock, deterioration of firearm efficiency and accuracy.
  • The purpose of the invention is to develop the system of shell case sealing in a way to eliminate the defects of the known solutions.
  • This purpose is implemented by shell case sealing in a historical percussion firearm, according to preamble No. 1 of the claim.
  • Thanks to the system of shell case sealing according to invention, the complete tightness of the gun-lock /shell case set is achieved, what guarantees full functionality and accuracy of a firearm.
  • The subject of invention is shown in an example of make on a figures, of which fig. 1 is showing in axial section the end of a shell case with visible notches, which are part of shell case sealing, and fig. 2 is showing the same end of shell case from fig. 1 but in a rear view, and fig. 3 same end of shell case with fixed return valve in a cross section, in a position before percussion cap explosion, and fig. 4 same end of shell case from fig. 3 in a position after firing the black powder charge.
  • The sealing, shown on four figures according to invention, consists of system solution made of a rear part 6 of a shell case 5 and return valve 1, which is put in a recess of rear part 6 of a shell case 5. In a hole 9 of rear part 6 of a shell case 5 are located angle notches 7 around flash hole 9 for gases (fig.1). These notches are conical and positioned symmetrically versus shell case axis (fig. 2). The return valve, which consists of bushing 2 and ball 3 is a reusable component and according to results of carried tests its wear could not be seen after firing 500 shots.
  • The second part of the sealing according to invention is return valve 1, which is a cylinder bushing 2 with a hole 10 and inner cut out 4 of cone-shape (fig. 3 and 4), with added sliding ball 3.
  • The bullet placed in a firearm is fired by means of a percussion cap(not visualized on figure) at the left side of a shell case 5 (fig. 3), of which gases are penetrating through a hole 10 in a bushing 2 of a return valve 1 of sealing and acting on ball 3, they are causing it to lean on hole 9 of a shell case. Then gases are penetrating deeper into inside of a shell case through notches 7, initiating ignition of the charge in a shell case (fig. 3).
  • As a result of gun powder ignition in a shell case 5 the gases going out from it are penetrating through notches 7 of a hole 9 to inside of a return valve 1, and acting on a ball 3 they are sliding it to opposite direction, finally causing it to lean on a conical surface of inner cut out 4 in a bushing 2 of return valve 1 (fig. 4). The ball 3 will be stuck in bushing 1, closing its hole 10, making flow out of gases impossible and as a result of it appears final secure sealing of a shell case.
  • In a different design solution of a sealing, the conical surface of inner cut out 4 of bushing 2 has an extra cylindrical cut out 8, which causes further stuck of ball 3 in a bushing 4 (fig. 4).
  • The advantage of a solution according to invention is complete sealing of a historical percussion firearm, what as a result is increasing its efficiency, allowing to achieve repeatability of shots, which was not possible because of frequent jams of mechanisms of a firearm because of much black powder residue. Earlier solutions of this kind did not ensure 100% sealing and have complex design. After firing 500 test shots using the bullets with sealing system according to invention neither misfires nor jams were observed.
  • Index of markings:
    • 1
    return valve
    2
    bushing
    3
    ball
    4
    cut out
    5
    shell case
    6
    rear part of shell case
    7
    notches
    8
    cut out
    9
    hole
    10
    hole

Claims (3)

  1. The shell case sealing in a historical percussion firearm with return valve located in a rear part of shell case, characterized in that it consists of reusable return valve (1) slide in a recess of rear part (6) of a shell case (5), which is a cylindrical bushing (2) with hole (10) and inner cut out (4) of conical shape, with added sliding ball (3) to inside, wherein the hole (9) operating with a ball (3) is bearing the notches (7) positioned symmetrically versus axis of a shell case.
  2. The sealing according to claim 1, characterized in that the number of notches (7) symmetrical versus axis of a shell case (5) is unrestricted.
  3. The sealing according to claim 1, characterized in that the conical surface of inner cut out (4) of a bushing (2) has an extra cylindrical cut out (8).
EP16460007.4A 2016-02-24 2016-02-24 Shell case with sealing system for use in a historical percussion firearm Active EP3211360B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL16460007T PL3211360T3 (en) 2016-02-24 2016-02-24 Shell case with sealing system for use in a historical percussion firearm
EP16460007.4A EP3211360B1 (en) 2016-02-24 2016-02-24 Shell case with sealing system for use in a historical percussion firearm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16460007.4A EP3211360B1 (en) 2016-02-24 2016-02-24 Shell case with sealing system for use in a historical percussion firearm

Publications (2)

Publication Number Publication Date
EP3211360A1 true EP3211360A1 (en) 2017-08-30
EP3211360B1 EP3211360B1 (en) 2019-09-04

Family

ID=55755554

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16460007.4A Active EP3211360B1 (en) 2016-02-24 2016-02-24 Shell case with sealing system for use in a historical percussion firearm

Country Status (2)

Country Link
EP (1) EP3211360B1 (en)
PL (1) PL3211360T3 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US158494A (en) * 1875-01-05 Improvement in metallic cartridge-cases
US3760729A (en) * 1971-12-21 1973-09-25 Us Army Hermetically sealed plastic cartridge case/cap system
EP0499332A1 (en) * 1991-02-14 1992-08-19 Proprietaries Ltd. Stylobate A pressurized gas cartridge ammunition

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US158494A (en) * 1875-01-05 Improvement in metallic cartridge-cases
US3760729A (en) * 1971-12-21 1973-09-25 Us Army Hermetically sealed plastic cartridge case/cap system
EP0499332A1 (en) * 1991-02-14 1992-08-19 Proprietaries Ltd. Stylobate A pressurized gas cartridge ammunition

Also Published As

Publication number Publication date
PL3211360T3 (en) 2020-03-31
EP3211360B1 (en) 2019-09-04

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