WO2006120477A1 - An improved gas operated gun mechanism - Google Patents

An improved gas operated gun mechanism Download PDF

Info

Publication number
WO2006120477A1
WO2006120477A1 PCT/GB2006/001792 GB2006001792W WO2006120477A1 WO 2006120477 A1 WO2006120477 A1 WO 2006120477A1 GB 2006001792 W GB2006001792 W GB 2006001792W WO 2006120477 A1 WO2006120477 A1 WO 2006120477A1
Authority
WO
WIPO (PCT)
Prior art keywords
bolt
barrel
firing chamber
firing
gun mechanism
Prior art date
Application number
PCT/GB2006/001792
Other languages
French (fr)
Inventor
Martin Carnall
Original Assignee
Evolve Paintball Limited
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 Evolve Paintball Limited filed Critical Evolve Paintball Limited
Priority to US12/532,775 priority Critical patent/US20100101550A1/en
Publication of WO2006120477A1 publication Critical patent/WO2006120477A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B11/00—Compressed-gas guns, e.g. air guns; Steam guns
    • F41B11/70—Details not provided for in F41B11/50 or F41B11/60
    • F41B11/73—Sealing arrangements; Pistons
    • 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
    • F41A3/00—Breech mechanisms, e.g. locks
    • F41A3/12—Bolt action, i.e. the main breech opening movement being parallel to the barrel axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B11/00—Compressed-gas guns, e.g. air guns; Steam guns
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B11/00—Compressed-gas guns, e.g. air guns; Steam guns
    • F41B11/60—Compressed-gas guns, e.g. air guns; Steam guns characterised by the supply of compressed gas
    • F41B11/62—Compressed-gas guns, e.g. air guns; Steam guns characterised by the supply of compressed gas with pressure supplied by a gas cartridge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B11/00—Compressed-gas guns, e.g. air guns; Steam guns
    • F41B11/70—Details not provided for in F41B11/50 or F41B11/60
    • F41B11/72—Valves; Arrangement of valves
    • F41B11/721—Valves; Arrangement of valves for controlling gas pressure for both firing the projectile and for loading or feeding

Definitions

  • This invention relates to an improved gas operated gun mechanism and particularly but not exclusively to an improved mechanism for a paintball gun. Paintball guns are used in paintball war games in which the participants fire paintballs at one another to mark a "hit".
  • a paintball gun mechanism in which compressed air in a canister connected to the gun housing is communicated with the interior of the barrel of the gun to expel a paintball therefrom through a bolt which moves forward in the barrel to open the communication, when the trigger of the gun is pulled, and backward to close it.
  • compressed air in a canister connected to the gun housing is communicated with the interior of the barrel of the gun to expel a paintball therefrom through a bolt which moves forward in the barrel to open the communication, when the trigger of the gun is pulled, and backward to close it.
  • a principal object of the present invention is to resolve these problems by replacing the tail and its enlargement with a valve member which is independent of the bolt and which is moved to an open position only during a final part of the movement of the bolt to its closed position. As soon as the bolt begins to move forward the valve closes so that during the greater part of the movement of the bolt from its open to its closed position no compressed air is admitted to the firing chamber to resist the movement of the bolt. Movement of the valve member is so small that it requires no extension of the gun housing to accommodate it
  • a gas-operated gun mechanism of the kind in which a bolt is reciprocable in a barrel between positions opening and closing communication between a source of compressed gas behind the bolt and the interior of the barrel forward of the bolt, thereby in said open position expelling a projectile from the barrel, communication between the source and the rear of the bolt being through a firing chamber of the barrel behind the bolt, characterised in that between said source and the rear of the bolt and not connected to the latter a valve is provided which is biased to a closed position in which it closes communication between said source and the firing chamber but which is displaced by the bolt to an open position during a final part of the movement of the bolt to the closed position of the latter, thereby re-charging the firing chamber.
  • valve is spring biased to its closed position.
  • the bolt may be tubular with a coaxial formation which enters a guide within the barrel when the bolt is retracted, said formation leaving the guide as the bolt reaches a forward, firing position thereby allowing compressed gas from the firing chamber to flow through the bolt.
  • the bolt is moved forward to its firing position by compressed gas from the firing chamber and is retracted from its firing position by the admission of compressed gas to an annular chamber between the bolt periphery and the barrel.
  • Figure 1 is a sectional elevation of the mechanism of a paintball gun in accordance with the invention
  • Figure 2 is a similar view of the mechanism of Figure 1 but with the bolt in the firing position.
  • the barrel 10 of a paintball gun contains a tubular bolt 11 having a coaxial central formation 12.
  • the formation 12 is reciprocable into and out of a tubular guide 13 fixed coaxially within the barrel 10 when the bolt 11 as a whole reciprocates in' the barrel.
  • To the rear of the guide 13 is a firing chamber 14 within the barrel.
  • an elongated valve member 17 is provided which is urged by a compression spring 18 to the closed position of Figure 1 in which it shuts off communication between the air passages 16 and the firing chamber 14.
  • a compression spring 18 During a final part of the rearward movement of the bolt 11 from the firing position of Figure 2 to the retracted position of Figure 1 the rear end of the formation 12 strikes the leading end of the valve member 17 and displaces the valve member to the open position of Figure 1 so that the firing chamber 14 is recharged with compressed air.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)

Abstract

In a paintball gun mechanism compressed air is admitted through passages (16) to the interior of the barrel (10) where it will move forward a hollow bolt (11) until it can escape through the bolt (11) to fire a paintball. The bolt (11) is then moved backward by compressed air in a chamber (15) until a central formation (12) of the bolt (11) enters a guide (13) to close a firing chamber (14) behind the bolt (11). The invention provides a valve member (17) independent of the bolt (11) which is biased by a spring (18) to close off the firing chamber (14) from the passages (16) except when displaced by the formation (12) of the bolt (11) during a final part of the rearward movement of the bolt (11).

Description

"AN IMPROVED GAS OPERATED GUN MECHANISM"
This invention relates to an improved gas operated gun mechanism and particularly but not exclusively to an improved mechanism for a paintball gun. Paintball guns are used in paintball war games in which the participants fire paintballs at one another to mark a "hit".
A paintball gun mechanism is known in which compressed air in a canister connected to the gun housing is communicated with the interior of the barrel of the gun to expel a paintball therefrom through a bolt which moves forward in the barrel to open the communication, when the trigger of the gun is pulled, and backward to close it. This means that for the .. whole time that the bolt is not in the closed position air is escaping even after a paintball has been fired, which represents a considerable wastage of compressed air. Moreover the bolt moves to its closed position against the pressurised air behind it, requiring considerable force to move the bolt.
In an effort to solve this problem it has been proposed to attach to the rear of the bolt a tail having an enlargement which will fill an orifice in the path of the compressed air between the canister and a firing chamber in the baitel behind the bolt when the bolt is in its open position, thereby cutting off communication between the canister and the firing chamber as a paintball is fired. This solution, however, is far from perfect. As soon as the bolt begins to move toward its closed position communication with the canister is again opened so that some wastage will occur before the bolt is fully closed. The bolt will still be working against compressed air behind it as it moves to its closed position. Even more seriously, the length of the tail must be at least equal to the travel of the bolt, requiring an extension of the rear of the gun housing which will make the gun unduly large and unweildy.
A principal object of the present invention is to resolve these problems by replacing the tail and its enlargement with a valve member which is independent of the bolt and which is moved to an open position only during a final part of the movement of the bolt to its closed position. As soon as the bolt begins to move forward the valve closes so that during the greater part of the movement of the bolt from its open to its closed position no compressed air is admitted to the firing chamber to resist the movement of the bolt. Movement of the valve member is so small that it requires no extension of the gun housing to accommodate it
In accordance with the present invention there is provided a gas-operated gun mechanism of the kind in which a bolt is reciprocable in a barrel between positions opening and closing communication between a source of compressed gas behind the bolt and the interior of the barrel forward of the bolt, thereby in said open position expelling a projectile from the barrel, communication between the source and the rear of the bolt being through a firing chamber of the barrel behind the bolt, characterised in that between said source and the rear of the bolt and not connected to the latter a valve is provided which is biased to a closed position in which it closes communication between said source and the firing chamber but which is displaced by the bolt to an open position during a final part of the movement of the bolt to the closed position of the latter, thereby re-charging the firing chamber.
Preferably the valve is spring biased to its closed position.
The bolt may be tubular with a coaxial formation which enters a guide within the barrel when the bolt is retracted, said formation leaving the guide as the bolt reaches a forward, firing position thereby allowing compressed gas from the firing chamber to flow through the bolt.
In a preferred embodiment of the invention the bolt is moved forward to its firing position by compressed gas from the firing chamber and is retracted from its firing position by the admission of compressed gas to an annular chamber between the bolt periphery and the barrel.
A preferred embodiment of the invention will now be described by way of non-limitative example with reference to the accompanying drawings, in which:
Figure 1 is a sectional elevation of the mechanism of a paintball gun in accordance with the invention, and Figure 2 is a similar view of the mechanism of Figure 1 but with the bolt in the firing position.
The barrel 10 of a paintball gun contains a tubular bolt 11 having a coaxial central formation 12. The formation 12 is reciprocable into and out of a tubular guide 13 fixed coaxially within the barrel 10 when the bolt 11 as a whole reciprocates in' the barrel. To the rear of the guide 13 is a firing chamber 14 within the barrel. When the bolt 11 moves backward from the position of 'Figure 1 to the position of Figure 2 under the influence of compressed air introduced into an annular chamber 15 around the bolt compressed air is admitted to the firing chamber 14 from a canister (not shown) through radial passages 16. A latch (not shown) holds the bolt in its retracted position. When the trigger (not shown) of the gun is pulled the latch is released and the chamber 15 evacuated so that compressed air in the firing chamber 14 can push the bolt 11 forward from the position of Figure 2 to the position of Figure 1 until the formation 12 emerges from the guide 13 so that compressed air can flow through the bolt and expel from the barrel 10 a paintball (not shown) in front of the bolt. The way in which a paintball is selected from a magazine to lie in front of the bolt 11 when the latter is retracted is well known per se and will not be described.
In accordance with the present invention an elongated valve member 17 is provided which is urged by a compression spring 18 to the closed position of Figure 1 in which it shuts off communication between the air passages 16 and the firing chamber 14. During a final part of the rearward movement of the bolt 11 from the firing position of Figure 2 to the retracted position of Figure 1 the rear end of the formation 12 strikes the leading end of the valve member 17 and displaces the valve member to the open position of Figure 1 so that the firing chamber 14 is recharged with compressed air.
By this arrangement, when the bolt is in the firing position of Figure 2 compressed air is exhausted from the firing chamber 14 and therefore the bolt 11 is not working against compressed air when it is retracted by pressure in the chamber 15. The travel of the valve member 17 is so small that the housing of the gun requires very little enlargement to accommodate it.

Claims

CLAIMS:
1. A gas-operated gun mechanism of the kind in which a bolt (11) is reciprocable in a barrel (10) between positions opening and closing communication between a source of compressed gas (16) behind the bolt and the interior of the barrel forward of the bolt, thereby in said open position expelling a paintball from the barrel, communication between the source and the rear of the bolt being through a firing chamber (14) of the barrel behind the bolt, characterised in that between said source (16) and the rear of the bolt and not connected to the latter (11) a yalve (17) is provided which is biased to a closed position in which it closes communication between said source (16) and the firing chamber (14) but which is displaced by the bolt (11) to an open position during a final part of the movement of the bolt to the closed position of the latier, thereby re-charging the firing chamber (14).
2. A gas-operated gun mechanism as claimed in claim 1, characterised in that the valve(17) is spring (18) biased to its closed position.
3. A gas-operated gun mechanism as claimed in either preceding claim, characterised in that the bolt (11) is tubular with a coaxial formation (12) which enters a guide (13) within the barrel (10) when the bolt is retracted, said formation (12) leaving the guide (13) as the bolt reaches a forward, firing position thereby allowing compressed gas from the firing chamber (14) to flow through the bolt (11).
4. A gas-operated gun mechanism as claimed in any one of the preceding claims, characterised in that the bolt (11) is moved forward to its firing position by compressed gas from the firing chamber (14) and is retracted from its firing position by the admission of compressed gas to an annular chamber (15) between the bolt (11) periphery and the barrel (10).
PCT/GB2006/001792 2005-05-13 2006-05-12 An improved gas operated gun mechanism WO2006120477A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/532,775 US20100101550A1 (en) 2005-05-13 2006-05-12 Gas operated gun mechanism

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0509728.2 2005-05-13
GB0509728A GB2426041A (en) 2005-05-13 2005-05-13 Gas operated gun mechanism

Publications (1)

Publication Number Publication Date
WO2006120477A1 true WO2006120477A1 (en) 2006-11-16

Family

ID=34708081

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2006/001792 WO2006120477A1 (en) 2005-05-13 2006-05-12 An improved gas operated gun mechanism

Country Status (3)

Country Link
US (1) US20100101550A1 (en)
GB (1) GB2426041A (en)
WO (1) WO2006120477A1 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060124118A1 (en) * 2004-07-16 2006-06-15 National Paintball Supply, Inc. Variable pneumatic sear for paintball gun
US7451755B2 (en) * 2004-07-16 2008-11-18 Kee Action Sports Gas governor, snatch grip, and link pin for paintball gun
US20070181114A1 (en) * 2006-02-07 2007-08-09 Tippmann Dennis J Jr Combination non-lethal projectile launcher and flash light
TWM313233U (en) * 2006-06-30 2007-06-01 Air Challenger Ind Co Ltd Percussion mechanism of paintball pistol
AU2007203202A1 (en) * 2007-07-09 2009-01-29 Bourke Grundy Paintball marker pneumatic firing assembly and method
US7854221B1 (en) * 2008-08-20 2010-12-21 Gore Thomas D Air gun vibration damper and method
US7841331B2 (en) * 2009-02-06 2010-11-30 Yao-Gwo Gan Paintball gun
US7861703B2 (en) * 2009-02-06 2011-01-04 Yao-Gwo Gan Paintball gun
US7841330B2 (en) * 2009-02-06 2010-11-30 Yao-Gwo Gan Paintball gun
TWM377576U (en) * 2009-06-10 2010-04-01 Sunworld Ind Co Ltd Paint ball percussion configuration for paint ball gun
US8104463B2 (en) * 2009-10-19 2012-01-31 Planet Eclipse Limited Bolt and valve mechanism that uses less gas
US20160146567A1 (en) * 2014-11-24 2016-05-26 William Nachefski Efficient high-velocity compressed gas-powered gun
US10113829B2 (en) * 2014-11-24 2018-10-30 William S. Nachefski Efficient high-velocity compressed gas-powered gun

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3572310A (en) * 1968-02-02 1971-03-23 Kensuke Chiba Compressed gas gun and valve therefor
US4936282A (en) * 1988-12-09 1990-06-26 Dobbins Jerrold M Gas powered gun
US5063905A (en) * 1990-09-06 1991-11-12 Farrell Kenneth R Pneumatic gun
US5349938A (en) * 1993-04-22 1994-09-27 Farrell Kenneth R Reciprocatable barrel pneumatic gun
EP1447637A1 (en) * 2003-02-11 2004-08-18 Paul Garfield Jong Improved paintball marker and kit of parts therefor
WO2005033612A1 (en) * 2003-09-05 2005-04-14 National Paintball Supply, Inc. Compressed gas-powered projectile accelerator

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US5257614A (en) * 1992-07-20 1993-11-02 Brian Sullivan Gas powered gun
US5771875A (en) * 1995-04-28 1998-06-30 Sullivan; Brian E. Gas powered repeating gun
US6820608B2 (en) * 2001-01-09 2004-11-23 New-Matics Licencing, Llc Compressed gas-powered gun simulating the recoil of a conventional firearm
CA2542888A1 (en) * 2003-10-27 2005-05-19 Smart Parts, Inc. Pneumatic assembly for a paintball gun
US20050188977A1 (en) * 2004-02-27 2005-09-01 Wygant Steven J. Pneumatic shooting device
US7624726B2 (en) * 2004-07-13 2009-12-01 Kee Action Sports I Llc Valve for compressed gas gun
US7451755B2 (en) * 2004-07-16 2008-11-18 Kee Action Sports Gas governor, snatch grip, and link pin for paintball gun
US20060124118A1 (en) * 2004-07-16 2006-06-15 National Paintball Supply, Inc. Variable pneumatic sear for paintball gun
US7395819B2 (en) * 2004-07-16 2008-07-08 Kee Action Sports Gas governor, snatch grip, and link pin for paintball gun
US7520275B2 (en) * 2005-10-22 2009-04-21 Long Robert M Valve assembly for paintball guns and the like, and improved guns incorporating the assembly
US7461646B2 (en) * 2006-03-08 2008-12-09 Smart Parts, Inc. Bolt for pneumatic paintball gun
WO2008097265A2 (en) * 2006-07-21 2008-08-14 Kee Action Sports I Llc Compressed gas gun and firing mechanism

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3572310A (en) * 1968-02-02 1971-03-23 Kensuke Chiba Compressed gas gun and valve therefor
US4936282A (en) * 1988-12-09 1990-06-26 Dobbins Jerrold M Gas powered gun
US5063905A (en) * 1990-09-06 1991-11-12 Farrell Kenneth R Pneumatic gun
US5349938A (en) * 1993-04-22 1994-09-27 Farrell Kenneth R Reciprocatable barrel pneumatic gun
EP1447637A1 (en) * 2003-02-11 2004-08-18 Paul Garfield Jong Improved paintball marker and kit of parts therefor
WO2005033612A1 (en) * 2003-09-05 2005-04-14 National Paintball Supply, Inc. Compressed gas-powered projectile accelerator

Also Published As

Publication number Publication date
GB2426041A (en) 2006-11-15
GB0509728D0 (en) 2005-06-22
US20100101550A1 (en) 2010-04-29

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