WO2015006597A2

WO2015006597A2 - Compressed gas cartridge

Info

Publication number: WO2015006597A2
Application number: PCT/US2014/046210
Authority: WO
Inventors: David PRIESTLEY
Original assignee: Inovairtech Llc
Priority date: 2013-07-10
Filing date: 2014-07-10
Publication date: 2015-01-15
Also published as: WO2015006597A3; US20150013656A1

Abstract

A compressed gas cartridge is provided that includes a hollow front cartridge section having a male high-pressure gas quick-connect fitting, a forward piston-receiving channel, and a projectile receptacle; a hollow cartridge rear section having a rear piston-receiving channel and a forward valve seat; a center cylinder connected between the cartridge front and rear sections and enclosing an interior gas storage space; and a piston that sealably fits within the front and rear piston-receiving channels. The piston has a solid rear portion configured with a striking surface and a hollow forward portion. The hollow forward portion has an exterior concentric seal with a rearward edge configured to sealably engage the valve seat. Piston exhaust/fill holes rearward of the concentric seal allow compressed gas to move between the gas storage space and the hollow interior of the piston forward portion during both discharge and filling.

Description

Compressed Gas Cartridge

FIELD OF INVENTION

[001] This invention relates generally to a self-contained compressed gas cartridge.

BACKGROUND OF THE INVENTION

[002] Compressed gas cartridges may power ammunition for small arms. Additionally,

compressed gas cartridges can provide a power source for other applications, such as to power a nail gun, impact wrenches or other small tool actuators.

[003] Basic air cartridge designs date back well over a hundred years. However, previous designs have numerous disadvantages. These include: (1.) the complication of numerous small parts; (2.) the need to dismantle a cartridge to fill it and then to reassemble it prior to use; (3.) the requirement for specialized pumps, often hand pumps, to fill the cartridges; (4.) the limitation to low gas volumes and/or to low⁷ pressures realized due to the filling methods employed and due to the complicated internal mechanisms of the cartridges; (5.) the length of time and difficulty in filling the air cartridges; and (6.) the relatively low power output of the conventional cartridge, for example, causing a lower muzzle velocity of the exiting projectile. For instance, with conventional cartridge designs, the kinetic energy output of the air cartridge is around 16 joules (12 ft/lbs).

[004] There is a need for a compressed gas cartridge that is more robust with fewer

complicated parts; does not need to be dismanded to fill and reassembled to use; does not require specialized pumps for refilling; is not limited to the low gas volumes and/or pressures of conventional cartridges; is quick and easy to refill; and has an increased power output.

BRIEF SUMMARY OF THE INVENTION

[005] The present invention is directed to a compressed gas cartridge that is described to operate in purpose-built small arms (such as pistols, rifles and automatic small arms or other gun-type devices) to launch projectiles at high velocities, but that may also be used as a power source for other applications.

[006] The compressed gas cartridge includes a hollow front cartridge section, a hollow rear cartridge section, a center cylinder connected between the hollow front cartridge section and the hollow rear cartridge section, and a piston assembly. [007] The hollow front cartridge section has an interior forward piston-receiving channel and an exterior male high-pressure quick-connect fitting. The quick-connect fitting allows rapid connection of the cartridge to a corresponding female quick-connect fitting on a standard compressed gas source, such as a scuba tank or gas compressor, for fast and convenient filling of the cartridge.

[008] The hollow rear cartridge section has a forward female valve seat and an interior rear piston-receiving channel.

[009] The center cylinder includes an interior surface partly defining the gas storage space, which is also defined by inner surfaces of the hollow rear cartridge section and the hollow front cartridge section.

[0010] The piston assembly includes a spring and a piston. The piston extends from the

forward piston-receiving channel through the interior gas storage space and into the rear piston- receiving channel. The piston has a hollow forward piston portion and a solid rear piston portion. The rear cartridge posterior portion of the hollow forward portion has an exterior cylindrical, concentric seal with a male rearward edge configured to sealably engage with the female valve seat. At least the outer rearward edge of the concentric seal is formed of a polymer, preferably the acetal copolymer Delrin^®. The piston also has exhaust/fill holes just rearward of the concentric seal that allow compressed gas to move between the gas storage space and the hollow interior of the piston forward portion during both discharge and filling.

[0011] An object of the present invention is to provide a compressed gas cartridge that is quick and easy to fill.

[0012] An additional object of the present invention is to provide a compressed gas cartridge that does not need to be dismantled to fill and reassembled to use.

[0013] A further object of the present invention is to provide a compressed gas cartridge that does not require specialized pumps for refilling.

[0014] Another object of the present invention is to provide a compressed gas cartridge that has an increased power output compared to some conventional compressed air cartridges.

[0015] These and other objects, features and advantages of the present invention will become more readily apparent from the attached drawings and from the detailed description of the preferred embodiments which follow. BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

[0016] The preferred embodiments of the invention will hereinafter be described in conjunction with the appended drawings, provided to illustrate and not to limit the invention, where like designations denote like elements.

[0017] FIG. 1 is a front perspective view of an embodiment of the gas cartridge of the present invention.

[0018] FIG. 2 is an exploded perspective view of an embodiment of the gas cartridge of the present invention.

[0019] FIG. 3 is a top view of an embodiment of the gas cartridge of the present invention shown with a projectile to be used with the gas cartridge.

[0020] FIG. 4 is a cut view with the frontward half of the exterior of the gas cartridge removed to allowing viewing of the interior components.

[0021] FIG. 5 is a perspective view of an embodiment of the gas cartridge of the present

invention in an exemplary filling environment.

[0022] Like reference numerals refer to like parts throughout the several views of the drawings.

DETAILED DESCRIPTION OF THE INVENTION

[0023] Shown throughout the figures, the present invention is directed toward a compressed gas cartridge that, compared to conventional cartridges, removes the need to dismantle and reassemble the cartridge during filling, attaches to standard compressed air sources, fills more quickly, reduces the number and complexity of interior parts leading to a more robust design, and increases the power output significantly. Though the compressed gas cartridge is described herein for use with purpose-built small arms (such as pistols, rifles and automatic small arms or other gun-type devices) to launch projectiles at high velocities, it may also be used as a power source for other applications.

[0024] Referring now to FIG. 1, a compressed gas cartridge, shown generally as reference number 10, is illustrated in accordance with a preferred embodiment of the present invention. As shown, the compressed gas cartridge 10 includes a hollow rear cartridge section 20, a hollow front cartridge section 40, a center cylinder 30 connected between the front cartridge section 40 and the rear cartridge section 20, and a piston assembly 60 (FIG. 2).

[0025] The hollow front cartridge section 40 has a front cartridge anterior portion and a front cartridge posterior portion. The front cartridge anterior portion is configured with an exterior male high-pressure quick-connect fitting 45 that allows rapid connection of the cartridge 10 to a corresponding female quick-connect fitting 75 (FIG. 5) on a conventional high-pressure compressed gas source 70, such as a compressed gas reservoir or gas compressor. The inventive cartridge allows for compressed gas to be filled at pressures between 100 BAR and 300 BAR (1450 psi to 4,350 psi), typically operating at the 200-250 BAR range (2900 psi - 3,625 psi), which is a typical pressure for the diving cylinders that are envisaged to be the key source of compressed air/gas. Higher pressure gas sources are available, as are compressors easily capable of reaching pressures higher than 300 BAR.

[0026] The front cartridge anterior portion of hollow front cartridge section 40 also includes a projectile receptacle 42 (FIG. 4) defined by the inner surface of the forward end 41 of the hollow front cartridge section 40. The projectile receptacle 42 will accept a bullet, pellet or other projectile 15 (FIG. 3) of the chosen designation of caliber. The projectile receptacle 42 is a machined hole of dimensions appropriate to the pre-selected caliber. The cahber of the air cartridge is designated by the srze and diameter of the hole in the forward end 41 of the hollow front cartridge section 40 and is designed to operate in cakbers from .22 to .50. For example, in the .357 cakber air cartridge the forward end 41 is machined to accept a projectile 9.1 mm in diameter x 10 mm in length. However, longer (or shorter) projectiles 15 (FIG. 3) may be inserted as the forward end 41 is of open design. Testing has shown that the inventive air cartridge can be designed for a wide range of currently available commercial ammunition and commerciaky accepted cakbers. The inventive air cartridges have been tested with bullets having up to a diameter of .358" (9.1 mm), having up to a length of 0.75" (19 mm) and weighing up to 200 grains.

[0027] As seen in FIG. 4, the front cartridge posterior portion of hokow front cartridge section

40 has an interior forward piston-receiving channel 44 defined by channel edges 48. The forward piston-receiving channel 44 is a cylindrical channel, the back portion of which, at least, has a diameter sufficient to accommodate the diameter of the front portion of piston 65.

[0028] The hokow rear cartridge section 20 has a rear cartridge anterior portion and a rear cartridge posterior portion. A forward valve seat 21 is machined into the rear cartridge anterior portion. The exterior of the rear cartridge posterior portion may include a locator fitting 25 configured to relate to a corresponding fitting within the gun-type device.

[0029] The interior surface of the rear cartridge posterior portion forms an interior rear piston- receiving channel 22. The rear piston-receiving channel 22 is a cylindrical channel that has a diameter sufficient to accommodate the diameter of the rear portion of piston 65. The interior surface 28 of the rear cartridge anterior portion forms a rear valve channel 19 extending from in front of sealing device 57 and forward to a forward portion of the forward valve seat 21. [0030] The center cylinder 30 is connectable to the hollow rear cartridge section 20 and the hollow front cartridge section 40. In a preferred aspect, the center cylinder 30 is removably connectable. Shoulders 49 of the hollow front cartridge section 40 and the hollow rear cartridge section 20 may extend outwardly to meet and to form a smooth exterior with the exterior surface of cylinder wall 39. As shown, the center cylinder 30 is configured with front female threads 36 and rear female threads 34 that correspond to front male threads 46 disposed on the exterior surface of the front cartridge posterior portion of hollow front cartridge section 40 and to the rear male threads 24 disposed on the exterior surface of the rear cartridge anterior portion of the hollow rear cartridge section 20, respectively. In this aspect, sealing devices, such as Citings, prevent compressed gas from leaking at the threaded areas. A front external sealing device 37 is disposed on the exterior of the posterior portion of hollow front cartridge section 40, and a rear exterior sealing device 27 is disposed on the exterior surface of said hollow rear cartridge section 20. Alternatively, the front or rear portion of the center cylinder 30 may be permanently attached to the hollow front cartridge section 40 or hollow rear cartridge section 20. The center cylinder 30 is preferably a high-grade pressure-resistant metal tube.

[0031] The cylinder inner surface 18 of the cylinder wall 39 of center cylinder 30 defines the lateral cylindrical outer edges of an interior gas storage space 14. The remainder of the gas storage space 14 is defined by forward portions of the hollow rear cartridge section 20 and rearward portions of the hollow front cartridge section 40, as seen in FIG. 4.

[0032] The piston assembly 60 includes a spring 35 and a piston 65. The piston 65 extends from a front edge 53 of a hollow forward piston portion 54 received by the forward piston- receiving channel 44 through the interior gas storage space 14 and into the rear piston-receiving channel 22 ending at solid end actuating surface 58 of solid rear piston portion 52. The piston 65 has a hollow forward piston portion 54 configured to sealably fit within at least a portion of the forward piston-receiving channel 44 and has a solid rear piston portion 52 configured to sealably fit within at least a portion of the rear piston-receiving channel 22. A front internal sealing device 47 seals between the hollow forward piston portion 54 and the forward piston- receiving channel 44. A rear internal sealing device 57 seals between the solid rear piston portion 52 and the rear piston-receiving channel 22. The forward piston portion 54 is hollow from front edge 53 to the forward surface 61 of solid rear piston portion 52.

[0033] The hollow forward piston portion 54 is configured with a rearwardly disposed polymer seal assembly 50. The seal assembly 50 includes an exterior cylindrical, concentric seal 55 with an outer rearward edge 51 configured to sealably engage with the valve seat 21. The sealable edge 51 of concentric seal 55 is preferably formed of an acetal copolymer, such as a polymer that has high tensile strength, stiffness, creep resistance and impact resistance, and that has good high-temperature performance and good mating with metal. In one preferred aspect, the acetal copolymer is DuPont™ Delrin^®. The polymer concentric seal 55 may be attached to the piston 65 in any manner as known in the art. In one aspect, the concentric seal 55 may be attached directly to the piston 65 with an adhesive such as epoxy resin. In another aspect the seal 55 may be threaded onto and permanently affixed to a metal support 56 that is machined into the hollow forward piston portion 54 of piston 65.

[0034] A spring seat 59 may be attached to, integrated into or formed unitarily with the forward- facing surface of the concentric seal 55. Spring 35 is disposed around the hollow forward piston portion 54 and extends from the spring seat 59 to the posterior portion of the hollow front cartridge section 40.

[0035] At the rearward end of hollow forward piston portion 54 of piston 65 there is at least one exhaust/fill hole 33 defined by exhaust/fill hole edges 32. In the preferred aspect, the exhaust/ fill hole edges 32 define a single exhaust/fill hole 33 extending through the rearward end of the hollow forward piston portion 54. The exhaust/fill hole 33 is just rearward of the outer rearward edge 51 of concentric seal 55. The at least one exhaust/ ill hole 33 allows compressed gas to move between the gas storage space 14 and the hollow interior of the piston forward portion 54 during both discharge and filling of the air cartridge.

[0036] In an aspect, the hollow front cartridge section 40 includes a check valve 31 disposed at the rearward end of the front cartridge posterior portion of the hollow front cartridge section 40. An inner surface of the check valve 31 forms a rearward portion of the forward piston- receiving channel 44. The check valve 31 is configured to move rearward during the inflow of compressed air during the filling procedure, providing another pathway by which the high pressure compressed air may proceed into the interior gas storage space 14. Preferably the check valve 31 is formed of a brass material. Preferably the hollow front cartridge section 40 further includes a check valve/posterior sealing device 43, such as an O-ring, disposed between the check valve 31 and the front cartridge posterior portion.

[0037] To fill the cartridge 10, the exterior male high-pressure quick-connect fitting 45 is

coupled to a corresponding female quick-connect fitting 75 (FIG. 5) on a conventional high- pressure compressed gas source 70, and a gas-source valve 73 is opened. The compressed gas moves from the gas source 70 through the male high-pressure quick-connect fitting 45 at the front cartridge anterior portion of the hollow front cartridge section 40 (FIG. 4), then through the forward piston-receiving channel 44 at the posterior portion of the hollow front cartridge section 40, and past the hollow piston front end 53 into the hollow forward piston portion 54. The compressed gas exits the hollow forward piston portion 54 through at least one exhaust/ fill hole 33 into the rear valve channel 19 formed by the interior surface 28 of the rear cartridge anterior portion and pushes against the back surface of the concentric seal 55, forcing the concentric seal outer rearward edge 51 to separate from the valve seat 21 to create a seal valve gas passage allowing the compressed gas to rush into the gas storage space 14. The gas-source valve 73 (FIG. 5) is then closed to prevent further flow of compressed gas out of the compressed gas source 70, excess gas is vented through bleed-off valve 71, and the cartridge 10 is released from the gas source 70 by disengaging the male high-pressure quick-connect fitting 45 from the corresponding female fitting. The entire filling procedure can typically be performed in under five seconds.

[0038] The cartridge 10 is introduced into a power-controlling device, such as a weapon, nail gun, impact wrench or the like. In the typical application in which the cartridge 10 is being used in a weapon, a projectile 15 (FIG. 3) of the chosen caliber is manually inserted into the projectile receptacle 42 (FIG. 4) by pushing. The cartridge 10 is then manually placed into the weapon.

[0039] An actuating force (for example, a strike of suitable force, akin to the strike from a firing pin) is applied to the end actuating surface 58. This actuating force causes the piston 65 to move forward, unseating the concentric seal outer rearward edge 51 from the valve seat 21 and causing them to separate to create a seal valve gas passage, which allows the compressed gas to rush from the gas storage space 14 through the at least one exhaust/ fill hole 33 and into the hollow forward piston portion 54 to reach the base of projectile 15 (FIG. 3) and to explosively accelerate the projectile 15 out of the cartridge 10, and then out of the weapon barrel. The gas passing at high pressure along the inside of the hollow forward piston portion 54 propels the projectile at a high rate of velocity. While historical kinetic energy output of conventional air cartridges is around 16 joules (12 ft/lbs), the inventive cartridge 10, when fired through the correct platform, demonstrates muzzle kinetic energies in the range of 100-300 joules (75 ft/lbs to over 220 ft/lbs) depending on type of fill gas and pressure used.

[0040] After the explosive discharge of the compressed gas during the firing sequence, the spring 35 around the hollow forward piston portion 54 pushes the concentric seal 55 against the valve seat 21 in a ready position for filling of the cartridge 10, as shown in the position of the piston 65 of FIG. 4. No dismantling is required to fill or use.

[0041] In the aspect which includes the check valve 31, during the filling procedure the

compressed gas from the high-pressure gas source 70 (FIG. 5) may force the check valve 31 backward to unseat the check valve/ posterior sealing device 43 and to open a check valve gas passage between the outside edges of the check valve 31 and the interior surface of the front cartridge posterior portion of the hollow front cartridge section 40. Compressed gas is forced through the check valve gas passage into the gas storage space 14.

[0042] Preferably the hollow rear cartridge section 20, hollow front cartridge section 40, center cylinder 30 and piston 65 are formed using a high-grade pressure-resistant metal.

[0043] The invention illustratively disclosed herein suitably may be practiced in the absence of any element which is not specifically disclosed herein.

[0044] Since many modifications, variations, and changes in detail can be made to the described preferred embodiments of the invention, it is intended that all matters in the foregoing description and shown in the accompanying drawings be interpreted as illustrative and not in a limiting sense. Thus, the scope of the invention should be determined by the appended claims and their legal equivalents.

Claims

CLAIMS What is claimed is:

1. A cartridge, comprising:

a hollow front cartridge section 40 having a front cartridge anterior portion and front cartridge posterior portion, said hollow front cartridge section 40 comprising: a male high-pressure gas quick-connect fitting 45 disposed at said front cartridge anterior portion; a forward piston-receiving channel 44 defined by at least a portion of the interior surface of said front cartridge section 40; a hollow rear cartridge section 20 having a rear cartridge anterior portion and a rear cartridge posterior portion comprising: a rear piston-receiving channel 22 defined by at least a portion of the interior surface of said rear cartridge posterior portion; a rear valve channel 19 defined by at least a portion of the interior surface of said rear cartridge anterior portion; a female valve seat 21 disposed on the forward portion of said hollow rear cartridge section 20; a center cylinder 30 connectable between said front cartridge posterior portion and said rear cartridge anterior portion, said center cylinder 30 comprising a cylinder inner surface 18 defining a portion of an interior gas storage space 14; and a piston assembly 60 comprising: a piston shaft comprising a hollow forward piston portion 54 and a solid rear piston portion 52; wherein said hollow forward piston portion 54 is configured to sealably fit within at least a portion of said forward piston-receiving channel 44; wherein said hollow forward piston portion 54 comprises at least one exhaust/fill hole edge 32 defining a least one exhaust/ fill hole 33 between the hollow interior and the exterior of said hollow forward piston portion 54; wherein said solid rear piston portion 52 is configured to sealably fit within at least a portion of said rearward piston-receiving channel 22; wherein said solid rear piston portion 52 comprises an end actuating surface 58; an exterior cylindrical, concentric seal 55 attached at a rearward portion of said hollow forward piston portion 54, said concentric seal 55 comprising a seal outer rearward edge 51 configured to sealably engage said valve seat 21; wherein said at least one exhaust/ fill hole edge 32 is disposed rearward of said rearward edge 51 of said concentric seal 55 and forward of said rear interior sealing device 57; and a spring extending between said concentric seal 55 and the rearward end of said front cartridge posterior portion.

2. The cartridge, as recited in claim 1, wherein said hollow front cartridge section 40 further comprises a check valve 31 disposed at the rearward end of said front cartridge posterior portion, wherein said check valve 31 has an interior portion comprising a portion of said forward piston-receiving channel 44.

3. The cartridge, as recited in claim 2, wherein said check valve 31 is formed of a brass material.

4. The cartridge, as recited in claim 2, wherein said hollow front cartridge section 40 further comprises a check valve/posterior sealing device disposed between said check valve 31 and said front cartridge posterior portion.

5. The cartridge, as recited in claim 1, wherein at least a portion of said concentric seal 55

including at least said seal outer rearward edge 51 is formed of an acetal copolymer.

6. The cartridge, as recited in claim 5, wherein said acetal copolymer comprises DuPont™

Delrin^®.

7. The cartridge, as recited in claim 1 , wherein:

said front cartridge posterior portion is configured with front male threads 46; said rear cartridge anterior portion is configured with rear male threads 24; said center cylinder 30 comprises a cylinder anterior portion and a cylinder posterior portion; said cylinder 30 anterior portion is configured with front female threads 36

corresponding to said front male threads 46 of said front cartridge posterior portion; and said cylinder 30 posterior portion is configured with rear female threads 34

corresponding to said rear male threads 24 of said rear cartridge 20 anterior portion.

8. The cartridge, as recited in claim 1 , wherein said front cartridge anterior portion comprises inner walls defining a projectile receptacle 42 configured to receive a projectile 15.

9. The cartridge, as recited in claim 1, further comprising:

a front external sealing device 37 on the exterior of said front cartridge posterior portion for sealing between said front cartridge posterior portion and said center cylinder 30; a rear external sealing device 27 on the exterior of said rear cartridge 20 for sealing between said rear cartridge 20 and said center cylinder 30; a front internal sealing device 47 disposed between said hollow forward piston portion 54 and said forward piston-receiving channel 44; and a rear interior sealing device 57 disposed on the interior surface of said hollow rear cartridge section 20.

10. A method of using compressed gas to provide a power source, comprising:

providing a compressed gas filled cartridge 10 comprising a hollow front cartridge section 40, a center cylinder 30 comprising an inner surface defining an interior gas storage space 14, a hollow rear cartridge section 20, and a piston assembly 60 including a piston 65 and a spring 35; wherein said hollow rear cartridge section 20 comprises a valve seat 21; wherein said piston assembly 60 comprises a hollow forward piston portion 54, a solid rear piston portion 52 comprising an end actuating surface 58, an exterior cylindrical concentric seal 55 having a seal outer rearward edge 51 configured to seal against said valve seat 21, and at least one exhaust/ fill hole edge 32 defining at least one exhaust/ fill hole 33 disposed in said hollow forward piston portion 54 rearward of at least a portion of said seal outer rearward edge 51; inserting said cartridge 10 in a power-controlling device; actuating an actuator against said end actuating surface 58; causing said piston 65 to move forward within said cartridge 10; causing said seal outer rearward edge 51 to break its seal with said valve seat 21; and allowing said compressed gas to explosively move from said gas storage space 14 through said at least one exhaust/ fill hole 33 and through the interior of said hollow forward piston portion 54 to exit out the front of said hollow front cartridge section 40.

11. The method as recited in claim 10, wherein at least a portion of said concentric seal 55

12. The method as recited in claim 10 further comprising:

attaching said cartridge 10 configured with a male quick-connect fitting 45 disposed on said hollow front cartridge section 40 to a corresponding female quick-connect fitting 75 on a compressed gas source 70; opening a gas-source valve 73 on said compressed gas source 70 to allow compressed gas to flow through said female quick-connect fitting 75 and said male quick-connect fitting 45; forcing compressed gas into said gas storage space 14; wherein said forcing compressed gas into said gas storage space 14 comprises forcing apart said concentric seal 55 outer rearward edge 51 from said valve seat 21 to create a seal valve gas passage, and forcing compressed gas through said seal valve gas passage into said gas storage space 14; closing said gas-source valve 73 on said compressed gas source 70 to prevent further flow of compressed gas out of said compressed gas source 70; and releasing said male quick-connect fitting 45 from said corresponding female quick- connect fitting 75.

13. The method as recited in claim 12 wherein said forcing compressed gas into said gas storage space 14 further comprises forcing backward a check valve 31 disposed in said hollow front cartridge section 40 to open a check valve gas passage and forcing compressed gas through said check valve gas passage into said gas storage space 14.

14. The method as recited in claim 10 wherein said power- controlling device comprises a gun- type device.

15. A method of using compressed gas to provide a power source, comprising:

attaching a cartridge configured with a male quick-connect fitting 45 to a corresponding female quick-connect fitting 75 on a compressed gas source 70; wherein said cartridge 10 comprises a hollow front cartridge section 40 comprising said male quick-connect fitting 45, a center cylinder 30 comprising a gas storage space 14, a hollow rear cartridge section 20, and a piston assembly 60 comprising a piston 65 and a spring 35; wherein said hollow rear cartridge section 20 comprises a valve seat 21; wherein said piston assembly 60 comprises a hollow forward piston portion 54, a solid rear piston portion 52 comprising an end actuating surface 58, an exterior cylindrical concentric seal 55 having a seal outer rearward edge 51 configured to seal against said valve seat 21, and at least one exhaust/ fill hole edge 32 defining at least one exhaust/ fill hole 33 disposed in said hollow forward piston portion 54 rearward of at least a portion of said seal outer rearward edge 51; opening a gas-source valve 73 on said compressed gas source 70 to allow compressed gas to flow through said female quick-connect fitting 75 and said male quick-connect fitting 45; forcing compressed gas into said gas storage space 14; wherein said forcing compressed gas into said gas storage space 14 comprises forcing apart said concentric seal 55 outer rearward edge 51 from said valve seat 21 to create a seal valve gas passage, and forcing compressed gas through said seal valve gas passage into said gas storage space 14; closing said gas-source valve 73 on said compressed gas source 70 to prevent further flow of compressed gas out of said compressed gas source 70; and releasing said male quick-connect fitting 45 from said corresponding female quick- connect fitting 75.

16. The method as recited in claim 15 wherein said forcing compressed gas into said gas storage space 14 further comprises forcing backward a check valve 31 disposed in said hollow front cartridge section 40 to open a check valve gas passage and forcing compressed gas through said check valve gas passage into said gas storage space 14.

17. The method as recited in claim 15, wherein at least a portion of said concentric seal 55

18. The method as recited in claim 15 further compnsing: inserting said cartridge 10 filled with compressed gas into a power-controlling device; actuating an actuator against said end actuating surface 58; causing said piston 65 to move forward; causing said seal outer rearward edge 51 to break its seal with said valve seat 21; and allowing said compressed gas to explosively move from said gas storage space 14 through said at least one exhaust/ fill hole 33 and through the interior of said hollow forward piston portion 54 to exit out the front of said hollow front cartridge section 40.

19. The method as recited in claim 15 wherein said power-controlling device comprises a gun-type device.