US20050188979A1 - Arrow gun method and apparatus - Google Patents
Arrow gun method and apparatus Download PDFInfo
- Publication number
- US20050188979A1 US20050188979A1 US11/038,684 US3868405A US2005188979A1 US 20050188979 A1 US20050188979 A1 US 20050188979A1 US 3868405 A US3868405 A US 3868405A US 2005188979 A1 US2005188979 A1 US 2005188979A1
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- United States
- Prior art keywords
- compressed gas
- barrel
- arrow
- fletching
- sealing member
- 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.)
- Abandoned
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Classifications
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B14/00—Projectiles or missiles characterised by arrangements for guiding or sealing them inside barrels, or for lubricating or cleaning barrels
- F42B14/06—Sub-calibre projectiles having sabots; Sabots therefor
- F42B14/064—Sabots enclosing the rear end of a kinetic energy projectile, i.e. having a closed disk shaped obturator base and petals extending forward from said base
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B6/00—Projectiles or missiles specially adapted for projection without use of explosive or combustible propellant charge, e.g. for blow guns, bows or crossbows, hand-held spring or air guns
- F42B6/02—Arrows; Crossbow bolts; Harpoons for hand-held spring or air guns
- F42B6/04—Archery arrows
- F42B6/06—Tail ends, e.g. nocks, fletching
Definitions
- the present invention generally relates to methods and apparatuses for propelling arrows, and more particularly to methods and apparatuses for propelling arrows using compressed gas.
- Compressed gas has been used to propel objects from a gun since as early as 1886, when inventor Clarence Hamilton developed a gun that would propel a BB by compressed gas from a barrel, which would later become known worldwide as the DAISY BB gun. Since then, compressed gas has been used to propel other objects from a gun, such as harpoons, darts, and bolts. However, the ability to propel a standard length arrow from a gun by compressed gas has hereto eluded those skilled in the art. Thus, there exists a need for a compressed gas gun able to project a standard length arrow.
- the object being propelled is acted upon by the maximum pressure exertable by the compressed gas in the cartridge for the entire length of the barrel.
- the object being propelled sees only a gradually increasing pressure as the objected being propelled travels the length of the barrel, thereby resulting in a significant reduction in muzzle velocities and kinetic energy transferred to the object.
- a compressed gas gun able to exert a more instantaneous pressure front upon the object being propelled to increase the amount of energy imparted to the object being propelled.
- the gun includes a barrel for receiving the arrow and a compressed gas storage chamber.
- the compressed gas storage chamber is adapted to receive and store compressed gas in an expanded state from the compressed gas cartridge for later release.
- the gun also includes a valve assembly for selectively releasing the compressed gas stored in the compressed gas storage chamber within the barrel for propelling the arrow out the barrel.
- the gun includes a barrel of a length about 22 inches or greater for receiving a standard length arrow within the barrel and a valve assembly.
- the valve assembly is used for selectively releasing a compressed gas from a compressed gas source into the barrel for propelling the standard length arrow out of the barrel.
- One embodiment of a method performed in accordance with the present invention for propelling an arrow from a gun having a barrel, a trigger, and a compressed gas storage chamber is disclosed.
- the method includes placing an arrow in the barrel, discharging a compressed gas into the compressed gas storage chamber for storage therein, and activating the trigger to cause the compressed gas to be released from the compressed gas storage chamber into the barrel to cause the arrow to be propelled from the barrel.
- the fletching aids in the propelling of the arrow shaft by compressed gas out of a barrel having an inner diameter defined by an inner surface of the barrel.
- the fletching includes an attachment member adapted to couple the fletching to a proximal end of an arrow shaft and an elongate body.
- the elongate body is coupled to the attachment member and has a sealing member.
- the sealing member has an outer diameter substantially equal to the inner diameter of the barrel such that the sealing member impedes at least a substantial portion of the compressed gas from flowing past the sealing member when the sealing member is in the barrel.
- the fletching includes an elongate body adapted to be coupled to an arrow shaft and a plurality of fins.
- the fins extend outward from the elongate body to a selected distance from a centerline of the elongate body.
- the elongate body has a sealing member for blocking gas flow, the sealing member extending outward from the centerline to at least the selected distance for blocking gas flow.
- the fletching includes an elongate body adapted to be coupled to an arrow shaft and a sealing member.
- the sealing member is attached to the elongate body for substantially impeding gas flow past the sealing member when the fletching is disposed in a barrel of a gun.
- the sealing member extends outward from a centerline of the fletching to a diameter of about 1 ⁇ 2 an inch or greater.
- FIG. 1 is an elevation view of one embodiment of an arrow gun formed in accordance with the present invention with a portion of the arrow gun cut away to show some of the internal components of the arrow gun;
- FIG. 2 is a partial cross-sectional view of the arrow gun of FIG. 1 , the cross-sectional cut taken vertically through a centerline of the arrow gun of FIG. 1 and a trigger shown prior to being pulled;
- FIG. 3 is a partial cross-sectional view of the arrow gun of FIG. 1 , the cross-sectional cut taken vertically through the centerline of the arrow gun of FIG. 1 and the trigger shown after being pulled;
- FIG. 4 is partial perspective view of a portion of the arrow gun shown in FIG. 2 ;
- FIG. 5 is an elevation view of an aft portion of one embodiment of an arrow formed in accordance with the present invention.
- FIG. 6 is a rear elevation view of the arrow shown in FIG. 5 ;
- FIG. 7 is a cross-sectional view of the arrow of FIG. 5 , the cross-sectional cut taken substantially through section 7 - 7 of FIG. 5 ;
- FIG. 8 is a partially exploded elevation view of an aft portion of an alternate embodiment of an arrow formed in accordance with the present invention.
- FIG. 10 is a cross-sectional view of the arrow of FIG. 8 , the cross-sectional cut taken substantially through section 10 - 10 of FIG. 8 ;
- FIG. 11 is a partial cross-sectional view of an alternate embodiment of an arrow gun formed in accordance with the present invention, the cross-sectional cut taken vertically through a centerline of the arrow gun and showing a trigger prior to being pulled;
- FIG. 1 One embodiment of an arrow gun 100 formed in accordance with the present invention is depicted in FIG. 1 .
- the arrow gun 100 uses a compressed gas to propel a standard length arrow 102 from a barrel 104 of the arrow gun 100 .
- the compressed gas is provided by a compressed gas cartridge 106 , such as a well known CO 2 cartridge.
- the compressed gas cartridge 106 is received within a cartridge receiver 108 which is used in coupling the compressed gas cartridge 106 to a stock 110 of the arrow gun 100 and insulates the user from the freezing of the compressed gas cartridge 106 upon release of the compressed gas contained therein.
- the arrow gun 100 of the illustrated embodiment includes a scope 112 , however a user may remove the scope and use a set of iron sights 114 of the arrow gun 100 if they so choose.
- the arrow gun 100 further includes a trigger 116 , a trigger guard 118 , and a safety 120 .
- the arrow gun 100 is preferably used for propelling “standard length” arrows, which in accordance with the current use of the term in the trade, is an arrow having a length between about 23 inches to about 32 inches. Standard length arrows are distinguishable from bolts, which are sometimes referred to as arrows, but which have lengths of less than about 20 inches, typically around 16 to 18 inches, and are often used with crossbows.
- the volume of the compressed gas storage chamber 122 prior to coupling of the compressed gas cartridge, is preferably greater than the volume of the compressed gas cartridge 106 .
- the volume of the compressed gas storage chamber 122 once the compressed gas cartridge 106 is punctured and becomes part of the compressed gas storage chamber 122 , is at least double of that of the compressed gas cartridge 106 .
- the volume of the compressed gas storage chamber 122 once the compressed gas cartridge 106 is punctured, is between about two to twelve times that of the compressed gas cartridge 106 .
- the volume of the compressed gas storage chamber 122 , once the compressed gas cartridge 106 is punctured is between about five to nine times that of the compressed gas cartridge 106 with a preferred value of about seven times that of the compressed gas cartridge 106 .
- the compressed gas storage chamber 122 includes a charge indicator 126 in communication with the compressed gas storage chamber, the charge indicator 126 having a raised position as shown in FIG. 2 indicating a presence of the compressed gas in the compressed gas storage chamber 122 and lowered position as shown in FIG. 3 indicating an absence of the compressed gas in the compressed gas storage chamber 122 .
- the charge indicator 126 includes a poppet 125 biased to a retracted position by a biasing member, one suitable example being a spring 127 .
- the charge indicator 126 is transitioned from the lowered position to the raised position by a pressure exerted upon the poppet 125 by the compressed gas in the compressed gas storage chamber 122 which overcomes the biasing force applied by the spring 127 .
- the sealing member 132 is coupled to a cam 136 .
- the cam 136 is rotatingly coupled to a pivot pin 138 .
- the cam 136 is able to rotate about the pivot pin 138 from a sealing position shown in FIG. 4 in which the sealing member 132 sealingly engages the opening 128 of the compressed gas storage chamber 122 and a release position shown in FIG. 3 wherein the sealing member 132 is displaced from the opening 128 such that the compressed gas stored in the compressed gas storage chamber 122 is released into the barrel 104 to propel the arrow 102 from the barrel 104 .
- the cam 136 includes a catch 144 for “catching” a notch of the trigger 116 as will be described in more detail below.
- the safety 120 of the trigger assembly 140 may be depressed by the user so as to engage the trigger 116 , thereby preventing the trigger 116 from rotating from the cocked position. Pulling out the safety 120 permits the trigger 116 to be rotated from the cocked position to the tripped position by the user applying finger pressure to the trigger 116 .
- a safety 120 is illustrated and described relative to the illustrated embodiment, it should be apparent to those skilled in the art that other embodiments are within the spirit and scope of the present invention.
- the arrow gun 100 further includes a receiver 152 .
- the receiver 152 couples the compressed gas storage chamber 122 to the barrel 104 of the arrow gun 100 and is coupled to both the valve assembly 130 and the trigger assembly 140 .
- the receiver 152 is horizontally split, forming a lower half 154 and an upper half 156 of the receiver 152 which are removably coupled to one another to aid in the installation and maintenance of the arrow gun 100 .
- the fletching 200 is adapted to transfer the power contained in the compressed gas to an arrow shaft 103 and to stabilize the arrow 102 during flight.
- the fletching 200 is made from a rigid or semi-rigid material, a few suitable examples being plastic, metal, resin based materials, carbon fiber based materials, etc.
- the fletching 200 includes an elongate body 204 extending between a forward end 206 and an aft end 208 . Disposed at the forward end 206 of the fletching 200 is an attachment member 210 adapted to couple the fletching 200 to the arrow shaft 103 .
- the attachment member 210 is a post which is secured within a bore of the arrow shaft 103 by a suitable means or combination of means, such as by an interference fit, adhesives, mechanical fasteners, etc.
- the sealing member extends radially outward from a centerline of the fletching 200 a selected distance.
- the sealing member may extend outward from the centerline to have a diameter greater than about a 1 ⁇ 2 inch, greater than about 6/10 of inch, or greater than about 7/10 of inch.
- the sealing member extends outward from the centerline to extend at least as far outward from the centerline as a set of fins 212 disposed on the elongate body 204 .
- the fins 212 preferably do not extend substantially radially outward past the outer perimeter of the sealing member 202 .
- the sealing member 202 has a circular outer perimeter and prevents gases from flowing past the sealing member 202 inward of the sealing member's outer perimeter.
- the fins 212 are angled between greater than 0 degrees and less than 3 degrees. Although a specific rate of rotation and angle of the fins is illustrated and described, it should be apparent to those skilled in the art that alternate rates and angles, either higher or lower than described above, are within the spirit and scope of the present invention.
- the female receptacle 324 and the male connector 326 are adapted to cooperatively interact with one another to lightly hold the sealing member 302 to the elongate body 304 such that even if the barrel is inclined downward, such that gravity acts on the arrow 102 to pull the arrow from the barrel, the elongate body 304 will remain attached to the sealing member 302 . However, once the arrow 102 leaves the barrel, air resistance acting upon the sealing member 302 separates the sealing member 302 from the elongate body 304 .
- the pressure of the compressed gas decreases to a pressure between about 200 psi to 400 psi, with a preferred value of 300 psi, since the volume of the compressed gas cartridge 106 is approximately 14% of the volume of the compressed gas storage chamber 122 .
- the volume of the compressed gas storage chamber 122 includes the volume of the compressed gas cartridge 106 once the compressed gas is released from the compressed gas cartridge 106 .
- the pressure of the compressed gas upon the charge indicator 126 causes the charge indicator to transition from its lowered position shown in FIG. 3 to its raised position shown in FIG. 2 , thereby indicating to the user that the compressed gas storage chamber 122 is charged with a compressed gas.
- Releasing the compressed gas from the compressed gas cartridge 106 into the compressed gas storage chamber 122 permits the compressed gas to pre-expand prior to release into the barrel 104 . It has been found that by allowing the compressed gas to partly expand and settle before releasing into the barrel, a higher average pressure is exerted upon the arrow 102 as the arrow travels the length of the barrel, resulting in an increase of the transfer of energy from the compressed gas to the arrow 102 , resulting in higher muzzle velocities, increased accuracy, increased distances, and the arrow exiting the barrel 104 with an increased level of kinetic energy resulting in increased damage to a target impacted by the arrow 102 .
- compressed gases of a specific pressure it should be apparent that compressed gases of other pressures, either higher or lower, are suitable for use with and are within the spirit and scope of the present invention.
- a specific gas namely CO 2
- any number of compressed gases may be used, a few suitable examples being air and nitrogen.
- the illustrated and described embodiment is described as using compressed gases stored in a compressed gas cartridge, it should be apparent to those skilled in the art that the arrow gun 100 may use any suitable compressed gas source, such as bulk sources, a few suitable examples being compressed air obtained from an air compressor or a portable pressure tank.
- the arrow 102 may be inserted into the barrel 104 with the fletching 300 located aft and the point of the arrow 102 facing forward toward a tip of the barrel 104 .
- the fletching 300 is engaged with the arrow holding assembly 488 to aid in holding the arrow 102 in the barrel 104 even when the distal end of the barrel 104 is tilted down from a horizontal position.
- the arrow gun 100 is pointed in a safe direction and the safety 120 pulled or pushed outward to the safety off position.
- the user's finger then enters the finger guard 118 and engages the trigger 116 .
- the user pulls with steady pressure upon the trigger 116 thereby overcoming the biasing pressure of the trigger biasing member 146 and causing the trigger 116 to rotate about the pivot pin 142 .
- Rotation of the trigger 116 continues until the notch 148 of the trigger 116 disengages from the catch 144 of the cam 136 .
- FIGS. 11 and 12 this detailed description will now focus on an alternate embodiment of an arrow gun 400 formed in accordance with the present invention.
- the arrow gun 400 of FIGS. 11 and 12 is substantially similar to the arrow gun 100 of FIGS. 1-4 . Therefore, for the sake of brevity, this detailed description will focus only upon where the alternate embodiment of FIGS. 11 and 12 differs from that of the embodiment of FIGS. 1-4 .
- the trigger assembly 400 includes a trigger 416 and a cam 436 .
- the trigger 416 rotates about a pivot pin 442 thereby disengaging a notch 448 of the trigger 416 from a catch 444 of the cam 436 , thereby permitting the cam 436 to rotate clockwise from a cocked position shown in FIG. 11 to a release position shown in FIG. 12 .
- the cam 436 includes a second catch 472 for engaging and holding a piston 474 of the valve assembly 430 in a sealing position as will be described in greater detail below.
- the valve assembly 430 includes a piston assembly 470 and a piston guide assembly 476 .
- the piston assembly 470 includes a sealing member comprised of a dome shaped piston 474 and a seal 478 .
- the piston 474 and seal 478 sealing engage an opening 428 in the compressed gas storage chamber 422 .
- a stem 480 is coupled to the piston 474 and a biasing member 482 , one suitable example being a spring, is disposed about the stem for biasing the piston 474 in sealing engagement with the opening 428 .
- the stem 480 is received by the piston guide assembly 476 .
- the piston guide assembly 476 includes an elongate bore 484 disposed within a guide body 486 .
- the elongate bore 484 is sized and configured to slidingly receive the stem 480 of the piston assembly 470 .
- the stem 480 may slide within the bore 484 between an extended position shown in FIG. 11 , wherein the biasing member 482 presses the piston 474 against the opening 428 in the compressed gas storage chamber 422 and a retracted position shown in FIG. 12 , wherein the piston 474 is displaced from the opening 428 such that a compressed gas stored in the compressed gas storage chamber 422 may be released to propel a standard length arrow from the arrow gun 400 .
- the second notch 472 of the cam 436 engages a distal end of the stem 480 , thereby retaining the piston 474 against the opening 428 of the compressed gas storage chamber 422 .
- the cam 436 has rotated such that the biasing member 482 is overcome by the pressure of the compressed gas acting on the piston 474 and the piston 474 is displaced from the opening 428 as the stem 480 slides within the bore 484 , moving the piston 474 to its retracted position.
- the biasing member 482 drives the piston 474 backs to its extended position where the piston 474 is in sealing engagement with the opening 428 of the compressed gas storage chamber 422 as shown in FIG. 11 .
- the cam 436 is biased to rotate back to its cocked position such that the second notch 472 of the cam 436 engages the distal end of the stem 480 , holding the piston 474 in sealing engagement with the opening 428 .
- the piston guide assembly 476 includes an arrow holding assembly 488 coupled to a forward end of the elongate guide body 486 .
- the arrow holding assembly 488 includes an O-ring 490 sized and configured to be received within the securing member 217 of the fletching 200 of FIGS. 5 and 6 or within the securing member 352 of the fletching 300 of FIGS. 8 and 9 .
- the O-ring 490 is used to apply a sufficient amount of friction against the securing member such that the arrow will be retained in the barrel even when the distal end of the barrel is tilted down from a horizontal position.
- the O-ring 490 is selected so that it does not apply an excessive amount of friction against the securing member, such that the arrow can be disengaged from the arrow holding assembly 488 without a significant loss of energy once the compressed gas is released from the compressed gas storage chamber 422 .
Abstract
A gun (100 and 400) for using compressed gas from a compressed gas cartridge (106) to propel an arrow (102). The gun includes a barrel (104) for receiving the arrow and a compressed gas storage chamber (122 and 422). The compressed gas storage chamber is adapted to receive and store compressed gas in an expanded state from the compressed gas cartridge for later release. The gun also includes a valve assembly (130 and 430) for selectively releasing the compressed gas stored in the compressed gas storage chamber within the barrel for propelling the arrow out the barrel.
Description
- This application claims the benefit of U.S. Provisional Application No. 60/536,761, filed Jan. 15, 2004, entitled Airbow, the disclosure of which is hereby expressly incorporated by reference, and priority from the filing date of which is hereby claimed under 35 U.S.C. § 119(e).
- The present invention generally relates to methods and apparatuses for propelling arrows, and more particularly to methods and apparatuses for propelling arrows using compressed gas.
- Compressed gas has been used to propel objects from a gun since as early as 1886, when inventor Clarence Hamilton developed a gun that would propel a BB by compressed gas from a barrel, which would later become known worldwide as the DAISY BB gun. Since then, compressed gas has been used to propel other objects from a gun, such as harpoons, darts, and bolts. However, the ability to propel a standard length arrow from a gun by compressed gas has hereto eluded those skilled in the art. Thus, there exists a need for a compressed gas gun able to project a standard length arrow.
- Further, it has been found that in compressed gas guns using compressed gas cartridges as the compressed gas source, that the energy contained in the compressed gas is inefficiently transferred to the object being propelled. Moreover, it has been found that previously developed compressed gas guns expand the compressed gas contained in the cartridge directly from the compressed gas cartridge without first pre-expanding the compressed gas. Thus the compressed gas must instantly expand from a minute volume in the compressed gas cartridge to a large volume as the compressed gas is released into the barrel to propel the object. It is found that this large expansion in volume of the gas and the time it takes the gas to travel from the compressed gas cartridge to the barrel results in an inefficient transfer of energy from the compressed gas to the object being propelled. Moreover, since the compressed gas must expand instantly and travel, a gradually increasing pressure front is exerted upon the object being propelled. Thus, the object being propelled begins moving out of the barrel before the maximum pressure exertable by the compressed gas from the cartridge has a chance to act upon the object. This gradual increase in pressure significantly reduces the amount of energy able to be transferred to the object as the object is propelled along the length of the barrel.
- Moreover, in an ideal compressed gas gun, the object being propelled is acted upon by the maximum pressure exertable by the compressed gas in the cartridge for the entire length of the barrel. In previously developed compressed gas guns, the object being propelled sees only a gradually increasing pressure as the objected being propelled travels the length of the barrel, thereby resulting in a significant reduction in muzzle velocities and kinetic energy transferred to the object. Thus, there exists a need for a compressed gas gun able to exert a more instantaneous pressure front upon the object being propelled to increase the amount of energy imparted to the object being propelled.
- Additionally, previously compressed gas guns fail to provide a means for the user to ascertain whether the compressed gas gun is charged with the compressed gas. Thus, injuries due to accidental discharges of the compressed gas and accidental firings are a problem. Thus, there exists a need for a compressed gas gun that indicates to the user whether or not the compressed gas gun is charged.
- One embodiment of a gun formed in accordance with the present invention for using compressed gas from a compressed gas cartridge to propel an arrow is disclosed. The gun includes a barrel for receiving the arrow and a compressed gas storage chamber. The compressed gas storage chamber is adapted to receive and store compressed gas in an expanded state from the compressed gas cartridge for later release. The gun also includes a valve assembly for selectively releasing the compressed gas stored in the compressed gas storage chamber within the barrel for propelling the arrow out the barrel.
- An alternate embodiment of a gun formed in accordance with the present invention for using compressed gas to propel a standard length arrow is disclosed. The gun includes a barrel of a length about 22 inches or greater for receiving a standard length arrow within the barrel and a valve assembly. The valve assembly is used for selectively releasing a compressed gas from a compressed gas source into the barrel for propelling the standard length arrow out of the barrel.
- One embodiment of a method performed in accordance with the present invention for propelling an arrow from a gun having a barrel, a trigger, and a compressed gas storage chamber is disclosed. The method includes placing an arrow in the barrel, discharging a compressed gas into the compressed gas storage chamber for storage therein, and activating the trigger to cause the compressed gas to be released from the compressed gas storage chamber into the barrel to cause the arrow to be propelled from the barrel.
- One embodiment of a fletching formed in accordance with the present invention for attaching to a proximal end of an arrow shaft is disclosed. The fletching aids in the propelling of the arrow shaft by compressed gas out of a barrel having an inner diameter defined by an inner surface of the barrel. The fletching includes an attachment member adapted to couple the fletching to a proximal end of an arrow shaft and an elongate body. The elongate body is coupled to the attachment member and has a sealing member. The sealing member has an outer diameter substantially equal to the inner diameter of the barrel such that the sealing member impedes at least a substantial portion of the compressed gas from flowing past the sealing member when the sealing member is in the barrel.
- An alternate embodiment of a fletching adapted to be attached to a proximal end of an arrow shaft to aid in propelling the arrow shaft by compressed gas out of a barrel of a gun is disclosed. The fletching includes an elongate body adapted to be coupled to an arrow shaft and a plurality of fins. The fins extend outward from the elongate body to a selected distance from a centerline of the elongate body. The elongate body has a sealing member for blocking gas flow, the sealing member extending outward from the centerline to at least the selected distance for blocking gas flow.
- Another embodiment of a fletching adapted to be attached to a proximal end of an arrow shaft to aid in propelling the arrow shaft by compressed gas out of a barrel of a gun is disclosed. The fletching includes an elongate body adapted to be coupled to an arrow shaft and a sealing member. The sealing member is attached to the elongate body for substantially impeding gas flow past the sealing member when the fletching is disposed in a barrel of a gun. The sealing member extends outward from a centerline of the fletching to a diameter of about ½ an inch or greater.
- The foregoing aspects and many of the attendant advantages of this invention will become better understood by reference to the following detailed description, when taken in conjunction with the accompanying drawings, wherein:
-
FIG. 1 is an elevation view of one embodiment of an arrow gun formed in accordance with the present invention with a portion of the arrow gun cut away to show some of the internal components of the arrow gun; -
FIG. 2 is a partial cross-sectional view of the arrow gun ofFIG. 1 , the cross-sectional cut taken vertically through a centerline of the arrow gun ofFIG. 1 and a trigger shown prior to being pulled; -
FIG. 3 is a partial cross-sectional view of the arrow gun ofFIG. 1 , the cross-sectional cut taken vertically through the centerline of the arrow gun ofFIG. 1 and the trigger shown after being pulled; -
FIG. 4 is partial perspective view of a portion of the arrow gun shown inFIG. 2 ; -
FIG. 5 is an elevation view of an aft portion of one embodiment of an arrow formed in accordance with the present invention; -
FIG. 6 is a rear elevation view of the arrow shown inFIG. 5 ; -
FIG. 7 is a cross-sectional view of the arrow ofFIG. 5 , the cross-sectional cut taken substantially through section 7-7 ofFIG. 5 ; -
FIG. 8 is a partially exploded elevation view of an aft portion of an alternate embodiment of an arrow formed in accordance with the present invention; -
FIG. 9 is a rear elevation view of the arrow shown inFIG. 8 ; -
FIG. 10 is a cross-sectional view of the arrow ofFIG. 8 , the cross-sectional cut taken substantially through section 10-10 ofFIG. 8 ; -
FIG. 11 is a partial cross-sectional view of an alternate embodiment of an arrow gun formed in accordance with the present invention, the cross-sectional cut taken vertically through a centerline of the arrow gun and showing a trigger prior to being pulled; and -
FIG. 12 is a partial cross-sectional view of the arrow gun ofFIG. 11 , the cross-sectional cut taken vertically through the centerline of the arrow gun and showing the trigger after being pulled. - One embodiment of an
arrow gun 100 formed in accordance with the present invention is depicted inFIG. 1 . Thearrow gun 100 uses a compressed gas to propel astandard length arrow 102 from abarrel 104 of thearrow gun 100. Preferably, the compressed gas is provided by a compressedgas cartridge 106, such as a well known CO2 cartridge. The compressedgas cartridge 106 is received within acartridge receiver 108 which is used in coupling the compressedgas cartridge 106 to astock 110 of thearrow gun 100 and insulates the user from the freezing of the compressedgas cartridge 106 upon release of the compressed gas contained therein. Thearrow gun 100 of the illustrated embodiment includes ascope 112, however a user may remove the scope and use a set ofiron sights 114 of thearrow gun 100 if they so choose. Thearrow gun 100 further includes atrigger 116, atrigger guard 118, and asafety 120. Thearrow gun 100 is preferably used for propelling “standard length” arrows, which in accordance with the current use of the term in the trade, is an arrow having a length between about 23 inches to about 32 inches. Standard length arrows are distinguishable from bolts, which are sometimes referred to as arrows, but which have lengths of less than about 20 inches, typically around 16 to 18 inches, and are often used with crossbows. - Referring to
FIG. 2 , the components of thearrow gun 100 will be described in greater detail. Thearrow gun 100 includes a compressedgas storage chamber 122. The compressedgas storage chamber 122 is preferably substantially disposed within the stock of thearrow gun 100, however it should be apparent to those skilled in the art that the compressedgas storage chamber 122 may have a substantial portion extending outward of the stock. The compressedgas storage chamber 122 includes aconnector 124 having male threads and alance 125 for puncturing thegas cartridge 106. The male threads on theconnector 124 are sized and configured to interface with female threads disposed on thereceiver 108 to permit thereceiver 108 to removably couple to theconnector 124 and press the compressedgas cartridge 106 upon thelance 125 to release the compressed gas into the compressedgas storage chamber 122. Of note, once thecompressed gas cartridge 106 is punctured by the lance, thecompressed gas cartridge 106 becomes an extension of the compressedgas storage chamber 122. Although theconnector 124 is illustrated and described as being adapted to accept threadlesscompressed gas cartridges 106, it should be apparent to those skilled in the art that theconnector 124 may alternately be designed to acceptcompressed gas cartridges 106 having threads. - The volume of the compressed
gas storage chamber 122, prior to coupling of the compressed gas cartridge, is preferably greater than the volume of the compressedgas cartridge 106. In one embodiment, the volume of the compressedgas storage chamber 122, once thecompressed gas cartridge 106 is punctured and becomes part of the compressedgas storage chamber 122, is at least double of that of the compressedgas cartridge 106. In other embodiments, the volume of the compressedgas storage chamber 122, once thecompressed gas cartridge 106 is punctured, is between about two to twelve times that of the compressedgas cartridge 106. In another embodiment, the volume of the compressedgas storage chamber 122, once thecompressed gas cartridge 106 is punctured, is between about five to nine times that of the compressedgas cartridge 106 with a preferred value of about seven times that of the compressedgas cartridge 106. - In one embodiment, the volume of the compressed
gas storage chamber 122 is selected to result in about a 20% to 80% decrease in the pressure of the compressed gas contained in the compressedgas cartridge 106 once released into the compressedgas storage chamber 122. In another embodiment, the volume of the compressedgas storage chamber 122 is selected to result in about a 30% to 50% decrease in the pressure of the compressed gas contained in the compressedgas cartridge 106 once released into the compressedgas storage chamber 122, with a preferred value of about 40%. - The compressed
gas storage chamber 122 includes acharge indicator 126 in communication with the compressed gas storage chamber, thecharge indicator 126 having a raised position as shown inFIG. 2 indicating a presence of the compressed gas in the compressedgas storage chamber 122 and lowered position as shown inFIG. 3 indicating an absence of the compressed gas in the compressedgas storage chamber 122. Thecharge indicator 126 includes apoppet 125 biased to a retracted position by a biasing member, one suitable example being aspring 127. Thecharge indicator 126 is transitioned from the lowered position to the raised position by a pressure exerted upon thepoppet 125 by the compressed gas in the compressedgas storage chamber 122 which overcomes the biasing force applied by thespring 127. Conversely, upon release of the compressed gas from the compressedgas storage chamber 122, thecharge indicator 126 automatically retracts to its lowered position ofFIG. 3 by the biasing force of thespring 127. Thecharge indicator 126 thus indicates to a user when the compressedgas storage chamber 122 is holding a charge and when thearrow gun 100 is potentially able to fire anarrow 102 or release compressed gas by both a tactile means, as the user can feel the presence of the raisedpoppet 125, and also by visual means, as the user can see the raised position of thepoppet 125 of thecharge indicator 126. - The compressed
gas storage chamber 122 includes anopening 128. Theopening 128 is circular and/or cylindrical in shape and is coupled in communication with thebarrel 104 of thearrow gun 100. The opening 128 permits the release of the compressed gas stored in the compressedgas storage chamber 122 into thebarrel 104 to propel thearrow 102 from thebarrel 104. - Referring to
FIG. 4 , thearrow gun 100 includes avalve assembly 130. Thevalve assembly 130 includes a sealingmember 132 adapted to sealingly engage theopening 128 in the compressedgas storage chamber 122. The sealingmember 132 is circular in shape and includes aseal 134 for sealing against an inner surface of the compressedgas storage chamber 122. The sealingmember 132 in the illustrated embodiment is a well known O-ring, however it should be apparent to those skilled in the art that other seals are suitable for use with and are within the spirit and scope of the present invention. - The sealing
member 132 is coupled to acam 136. Thecam 136 is rotatingly coupled to apivot pin 138. Thecam 136 is able to rotate about thepivot pin 138 from a sealing position shown inFIG. 4 in which the sealingmember 132 sealingly engages theopening 128 of the compressedgas storage chamber 122 and a release position shown inFIG. 3 wherein the sealingmember 132 is displaced from theopening 128 such that the compressed gas stored in the compressedgas storage chamber 122 is released into thebarrel 104 to propel thearrow 102 from thebarrel 104. Thecam 136 includes acatch 144 for “catching” a notch of thetrigger 116 as will be described in more detail below. - Returning to
FIG. 4 , thearrow gun 100 also includes atrigger assembly 140. Thetrigger assembly 140 includes thetrigger 116, thetrigger guard 118, and thesafety 120 mentioned above, and apivot pin 142 and a biasingmember 146. Thetrigger 116 is rotatingly coupled to thepivot pin 142. Thetrigger 116 may rotate about thepivot pin 142 between a cocked position shown inFIG. 4 to a tripped or release position shown inFIG. 3 . In the cocked position, thecatch 144 of thecam 136 engages anotch 148 on thetrigger 116, thenotch 148 adapted to releasably engage thecatch 144. Thenotch 148 includes acam follower 150, which in the illustrated embodiment is in the form of a roller, for following acam surface 151 of thecam 136. The biasingmember 146, which in the illustrated embodiment is a spring, biases thetrigger 116 into the cocked position ofFIG. 4 . - The
safety 120 of thetrigger assembly 140 may be depressed by the user so as to engage thetrigger 116, thereby preventing thetrigger 116 from rotating from the cocked position. Pulling out thesafety 120 permits thetrigger 116 to be rotated from the cocked position to the tripped position by the user applying finger pressure to thetrigger 116. Although one embodiment of asafety 120 is illustrated and described relative to the illustrated embodiment, it should be apparent to those skilled in the art that other embodiments are within the spirit and scope of the present invention. - The
arrow gun 100 further includes areceiver 152. Thereceiver 152 couples the compressedgas storage chamber 122 to thebarrel 104 of thearrow gun 100 and is coupled to both thevalve assembly 130 and thetrigger assembly 140. In the illustrated embodiment, thereceiver 152 is horizontally split, forming alower half 154 and anupper half 156 of thereceiver 152 which are removably coupled to one another to aid in the installation and maintenance of thearrow gun 100. - Turning to
FIGS. 5-7 , this detailed description will now focus upon one embodiment of afletching 200 formed in accordance with the present invention suitable for use with thearrow gun 100 described above. Thefletching 200 is adapted to transfer the power contained in the compressed gas to anarrow shaft 103 and to stabilize thearrow 102 during flight. Thefletching 200 is made from a rigid or semi-rigid material, a few suitable examples being plastic, metal, resin based materials, carbon fiber based materials, etc. - Referring to
FIG. 5 , thefletching 200 includes anelongate body 204 extending between aforward end 206 and anaft end 208. Disposed at theforward end 206 of thefletching 200 is anattachment member 210 adapted to couple thefletching 200 to thearrow shaft 103. In the illustrated embodiment, theattachment member 210 is a post which is secured within a bore of thearrow shaft 103 by a suitable means or combination of means, such as by an interference fit, adhesives, mechanical fasteners, etc. - The
elongate body 204 flares outward in a bell shape from theforward end 206 to theaft end 208 of theelongate body 204 to form a sealingmember 202 at theaft end 208 of thefletching 200. The sealingmember 202 is adapted to have an outer diameter which is substantially equal to an inner diameter of the barrel of the arrow gun such that the sealingmember 202 substantially seals the barrel. In one embodiment, the sealingmember 202 has an outer diameter which is slightly less than the inner diameter of the barrel such that the sealingmember 202 may slide along the barrel with minimal friction losses and so that a small amount of the compressed gas may slip past the sealingmember 202 to provide an air cushion for the arrow to ride upon within the barrel during shooting of the arrow. In one embodiment, the inner diameter of the barrel is more than about 0.005 of an inch greater than the outer diameter of the sealingmember 202. In another embodiment, the inner diameter of the barrel is more than about 0.010 of an inch greater than the outer diameter of the sealingmember 202. In a preferred embodiment, the inner diameter of the barrel is more than about 0.012 of an inch greater than the outer diameter of the sealingmember 202. - In another embodiment, the sealing member extends radially outward from a centerline of the fletching 200 a selected distance. For instance, the sealing member may extend outward from the centerline to have a diameter greater than about a ½ inch, greater than about 6/10 of inch, or greater than about 7/10 of inch. In another embodiment, the sealing member extends outward from the centerline to extend at least as far outward from the centerline as a set of
fins 212 disposed on theelongate body 204. In other words, thefins 212 preferably do not extend substantially radially outward past the outer perimeter of the sealingmember 202. Preferably, the sealingmember 202 has a circular outer perimeter and prevents gases from flowing past the sealingmember 202 inward of the sealing member's outer perimeter. - Referring to
FIGS. 5 and 7 , extending radially outward at 90 degree intervals from theelongate body 204 are fourfins 212, although it should be apparent to those skilled in the art that other arrangements and numbers of fins are within the spirit and scope of the present invention. Thefins 212 help to stabilize thearrow 102 during flight. Preferably thefins 212 are disposed in a helical pattern upon the outer surface of theelongate body 204 so that thefins 212 are inclined slightly relative to alongitudinal axis 216 of thefletching 200 to impart rotation of the arrow during flight. - More specifically and as best shown in
FIG. 5 , alongitudinal axis 218 of each of thefins 212 is inclined relative to thelongitudinal axis 216 of thefletching 200 by apredetermined angle 220 as the fins wrap around theelongate body 204. In the illustrated embodiment, thefins 212 are inclined relative to thelongitudinal axis 216 of thefletching 200 by anangle 220 selected to result in thearrow 102 rotating about its longitudinal axis during flight a selected rate, such as one revolution per 30 inches of travel. In one embodiment, thefins 212 are included relative to thelongitudinal axis 216 by an angle greater than 0 degrees but less than 10 degrees. In another embodiment, thefins 212 are angled between greater than 0 degrees and less than 5 degrees. In another embodiment, thefins 212 are angled between greater than 0 degrees and less than 3 degrees. Although a specific rate of rotation and angle of the fins is illustrated and described, it should be apparent to those skilled in the art that alternate rates and angles, either higher or lower than described above, are within the spirit and scope of the present invention. - Referring to
FIG. 6 , extending radial inward at 90-degree intervals from theelongate body 204 at itsaft end 208 are four strengtheningwebs 214. The four strengtheningwebs 214 are coupled to a securingmember 217 disposed along a longitudinal center line of thefletching 200. Turning toFIG. 5 , the securingmember 217 is adapted to interface with anarrow holding assembly 160 coupled to the receiver for interfacing with the securingmember 217 to hold thearrow 102 within the barrel even should the barrel be inclined downward such that gravity acts on thearrow shaft 103 to draw the arrow from the barrel. The securingmember 217 may receive an O-ring 162 of thearrow holding assembly 160 upon the outer cylindrical surface of the securingmember 217, such as illustrated inFIG. 5 . Alternately, the securingmember 217 may receive an O-ring within the securingmember 217 such that the O-ring grips an inner cylindrical surface of the securingmember 217 to hold thearrow 102 within the barrel until propelled therefrom by compressed gas as shown with regard to the alternate embodiment of afletching 300 andarrow holding assembly 488 shown inFIG. 8 and as will be described in more detail below. - Turing to
FIGS. 8-10 , this detailed description will now focus upon an alternate embodiment of afletching 300 formed in accordance with the present invention suitable for use with the arrow gun described above. Thefletching 300 includes anelongate body 304 extending between aforward end 306 and anaft end 308. Disposed at theforward end 306 of thefletching 300 is anattachment member 310 adapted to couple thefletching 300 to anarrow shaft 103. In the illustrated embodiment, theattachment member 310 is a post which is secured within a bore of thearrow shaft 103 by a suitable means or combination of means, such as by an interference fit, adhesives, mechanical fasteners, etc. - The
elongate body 304 is substantially cylindrical in shape. A sealingmember 302 is removably secured to theaft end 308 of thefletching 300 by a sealingmember retaining assembly 328. In the illustrated embodiment, the retainingassembly 328 includes afemale receptacle 324 disposed in theaft end 308 of theelongate body 304 for removably receiving a cooperatively shapedmale connector 326 of the retainingassembly 328 disposed on the sealingmember 302. Thefemale receptacle 324 and themale connector 326 are adapted to cooperatively interact with one another to lightly hold the sealingmember 302 to theelongate body 304 such that even if the barrel is inclined downward, such that gravity acts on thearrow 102 to pull the arrow from the barrel, theelongate body 304 will remain attached to the sealingmember 302. However, once thearrow 102 leaves the barrel, air resistance acting upon the sealingmember 302 separates the sealingmember 302 from theelongate body 304. Although thefemale receptacle 324 is shown disposed on theelongate body 304 and themale connector 326 is shown disposed on the sealingmember 302, it should be apparent to those skilled in the art that thefemale receptacle 324 may alternately be located on the sealingmember 302 and the male connector located on theelongate body 304. - As best shown in
FIG. 9 , the sealingmember 302 is adapted to have an outer diameter which is substantially equal to an inner diameter of the barrel of the arrow gun such that the sealingmember 302 substantially seals the barrel. In one embodiment, the sealingmember 302 has an outer diameter which is slightly less than the inner diameter of the barrel such that the sealingmember 302 may slide along the barrel with minimal friction losses and so that a small amount of the compressed gas may slip past the sealingmember 302 to provide an air cushion for the arrow to ride upon within the barrel during shooting of the arrow. In one embodiment, the inner diameter of the barrel is more than about 0.005 of an inch greater than the outer diameter of the sealingmember 302. In another embodiment, the inner diameter of the barrel is more than about 0.010 of an inch greater than the outer diameter of the sealingmember 302. In a preferred embodiment, the inner diameter of the barrel is more than about 0.012 of an inch greater than the outer diameter of the sealingmember 302. - In another embodiment, the sealing
member 302 extends radially outward from a centerline of the fletching 300 a selected distance. For instance, the sealing member may extend outward from the centerline to have a diameter greater than about a ½ inch, greater than about 6/10 of inch, or greater than about 7/10 of inch. In another embodiment, the sealing member extends outward from the centerline to extend at least as far outward from the centerline of a set offins 312 disposed on theelongate body 304. Preferably, the sealingmember 302 has a circular outer perimeter and prevents gas flow from flowing past the sealingmember 302 inward of the sealing member's outer perimeter. - Extending radially outward at 120 degree intervals from the
elongate body 304 are threefins 312, although it should be apparent to those skilled in the art that other arrangements and numbers of fins are within the spirit and scope of the present invention. Thefins 312 help to stabilize thearrow 102 during flight. Preferably thefins 312 are disposed in a helical pattern upon the outer surface of theelongate body 304 so that thefins 312 are inclined slightly relative to a longitudinal axis of thefletching 300 to impart rotation of the arrow during flight as described above for the embodiment ofFIGS. 5-7 . However, to simplify the drawings, thefins 312 in this embodiment are shown in a non-helical arrangement running parallel with a longitudinal axis of thefletching 300. - As best shown in
FIGS. 8 and 9 , the sealingmember 302 may have aretention assembly 350 for interfacing with an arrow retaining assembly to hold thearrow 102 in the barrel, as similarly described for the fletching shown inFIGS. 5-7 . Theretention assembly 350 includes a cylindrical shaped bore 352 disposed along a central axis of the sealingmember 302. The cylindrical shaped bore 352 is adapted to receive an O-ring 490 of anarrow holding assembly 488. The O-ring is used to apply a sufficient amount of friction against thebore 352 such that thearrow 102 will be retained in the barrel even when the distal end of the barrel is tilted down from a horizontal position. The friction exerted against thebore 352, however, is preferably not an excessive amount, such that thearrow 102 can be easily disengaged from thearrow holding assembly 488 without a significant loss of energy once the compressed gas is released from the compressed gas storage chamber. - Referring to
FIG. 2 and in light of the above description of the structure of thearrow gun 100, the operation of thearrow gun 100 will now be described. First, thesafety 120 is depressed locking thetrigger 116 in the cocked position. Thecompressed gas cartridge 106 is placed within thecartridge receiver 108. Thecartridge receiver 108 is screwed into theconnector 124, resulting in the compressed gas stored in the compressedgas cartridge 106 being released into the compressedgas storage chamber 122. In one working embodiment, thecompressed gas cartridge 106 is a well known 12 gram CO2 compressed gas cartridge containing the CO2 at a pressure of approximately 800 psi. Once the CO2 is released into the compressedgas storage chamber 122, the pressure of the compressed gas decreases to a pressure between about 200 psi to 400 psi, with a preferred value of 300 psi, since the volume of the compressedgas cartridge 106 is approximately 14% of the volume of the compressedgas storage chamber 122. (As noted above, the volume of the compressedgas storage chamber 122 includes the volume of the compressedgas cartridge 106 once the compressed gas is released from the compressedgas cartridge 106.) The pressure of the compressed gas upon thecharge indicator 126 causes the charge indicator to transition from its lowered position shown inFIG. 3 to its raised position shown inFIG. 2 , thereby indicating to the user that the compressedgas storage chamber 122 is charged with a compressed gas. - Releasing the compressed gas from the compressed
gas cartridge 106 into the compressedgas storage chamber 122 permits the compressed gas to pre-expand prior to release into thebarrel 104. It has been found that by allowing the compressed gas to partly expand and settle before releasing into the barrel, a higher average pressure is exerted upon thearrow 102 as the arrow travels the length of the barrel, resulting in an increase of the transfer of energy from the compressed gas to thearrow 102, resulting in higher muzzle velocities, increased accuracy, increased distances, and the arrow exiting thebarrel 104 with an increased level of kinetic energy resulting in increased damage to a target impacted by thearrow 102. - Although the illustrated embodiment is described as using compressed gases of a specific pressure, it should be apparent that compressed gases of other pressures, either higher or lower, are suitable for use with and are within the spirit and scope of the present invention. Further, although a specific gas, namely CO2, is mentioned, it should be apparent to those skilled in the art that any number of compressed gases may be used, a few suitable examples being air and nitrogen. Additionally, although the illustrated and described embodiment is described as using compressed gases stored in a compressed gas cartridge, it should be apparent to those skilled in the art that the
arrow gun 100 may use any suitable compressed gas source, such as bulk sources, a few suitable examples being compressed air obtained from an air compressor or a portable pressure tank. - Referring to
FIGS. 4 and 8 , once the compressed gas is released into the compressedgas storage chamber 122, thearrow 102 may be inserted into thebarrel 104 with thefletching 300 located aft and the point of thearrow 102 facing forward toward a tip of thebarrel 104. Thefletching 300 is engaged with thearrow holding assembly 488 to aid in holding thearrow 102 in thebarrel 104 even when the distal end of thebarrel 104 is tilted down from a horizontal position. - The
arrow gun 100 is pointed in a safe direction and thesafety 120 pulled or pushed outward to the safety off position. The user's finger then enters thefinger guard 118 and engages thetrigger 116. When the user wishes to discharge thearrow 102 from thearrow gun 100, the user pulls with steady pressure upon thetrigger 116 thereby overcoming the biasing pressure of thetrigger biasing member 146 and causing thetrigger 116 to rotate about thepivot pin 142. Rotation of thetrigger 116 continues until thenotch 148 of thetrigger 116 disengages from thecatch 144 of thecam 136. At this point, the pressure exerted by the compressed gas in the compressedgas chamber 122 forces the rapid rotation of thecam 136, and thus the rapid unseating of the sealingmember 132 from theopening 128 of the compressedgas storage chamber 122. As thecam 136 rotates, thecam follower 150 follows along thecam surface 151 of thecam 136. Once the sealingmember 132 is unseated from theopening 128, the pre-expanded compressed gas acts upon thefletching 300, propelling thearrow 102 from thebarrel 104 at a very high velocity and with a large amount of kinetic energy. - Due to the clearance between the outer perimeter of the
fletching 300 and the inner perimeter of thebarrel 104, a small amount of the compressed gas released into the barrel passes past thefletching 300 through the clearance gap. The compressed air passing through the clearance gap helps promote an air bed for “floating” thefletching 300 along the length of thebarrel 104 with only minimal friction losses. - Referring to
FIGS. 11 and 12 , this detailed description will now focus on an alternate embodiment of anarrow gun 400 formed in accordance with the present invention. Thearrow gun 400 ofFIGS. 11 and 12 is substantially similar to thearrow gun 100 ofFIGS. 1-4 . Therefore, for the sake of brevity, this detailed description will focus only upon where the alternate embodiment ofFIGS. 11 and 12 differs from that of the embodiment ofFIGS. 1-4 . - The
arrow gun 400 includes a compressedgas storage chamber 422 for storing a compressed gas substantially as described above. However, thevalve assembly 430 and triggerassembly 440 of thearrow gun 400 for selectively releasing a compressed gas from thestorage chamber 422 differ from the valve assembly and trigger assembly of the previously described embodiment. - The
trigger assembly 400 includes atrigger 416 and acam 436. When thetrigger 416 is pulled, thetrigger 416 rotates about apivot pin 442 thereby disengaging anotch 448 of thetrigger 416 from acatch 444 of thecam 436, thereby permitting thecam 436 to rotate clockwise from a cocked position shown inFIG. 11 to a release position shown inFIG. 12 . Thecam 436 includes asecond catch 472 for engaging and holding apiston 474 of thevalve assembly 430 in a sealing position as will be described in greater detail below. - The
valve assembly 430 includes apiston assembly 470 and apiston guide assembly 476. Thepiston assembly 470 includes a sealing member comprised of a dome shapedpiston 474 and aseal 478. Thepiston 474 and seal 478 sealing engage anopening 428 in the compressedgas storage chamber 422. Astem 480 is coupled to thepiston 474 and a biasingmember 482, one suitable example being a spring, is disposed about the stem for biasing thepiston 474 in sealing engagement with theopening 428. - The
stem 480 is received by thepiston guide assembly 476. Moreover, thepiston guide assembly 476 includes anelongate bore 484 disposed within aguide body 486. Theelongate bore 484 is sized and configured to slidingly receive thestem 480 of thepiston assembly 470. Thestem 480 may slide within thebore 484 between an extended position shown inFIG. 11 , wherein the biasingmember 482 presses thepiston 474 against theopening 428 in the compressedgas storage chamber 422 and a retracted position shown inFIG. 12 , wherein thepiston 474 is displaced from theopening 428 such that a compressed gas stored in the compressedgas storage chamber 422 may be released to propel a standard length arrow from thearrow gun 400. - When the
trigger assembly 440 is in the cocked position shown inFIG. 11 , thesecond notch 472 of thecam 436 engages a distal end of thestem 480, thereby retaining thepiston 474 against the opening 428 of the compressedgas storage chamber 422. When thetrigger assembly 440 is in the release position shown inFIG. 12 , thecam 436 has rotated such that the biasingmember 482 is overcome by the pressure of the compressed gas acting on thepiston 474 and thepiston 474 is displaced from theopening 428 as thestem 480 slides within thebore 484, moving thepiston 474 to its retracted position. When the pressure is released from the compressedgas storage chamber 422, the biasingmember 482 drives thepiston 474 backs to its extended position where thepiston 474 is in sealing engagement with theopening 428 of the compressedgas storage chamber 422 as shown inFIG. 11 . Likewise, thecam 436 is biased to rotate back to its cocked position such that thesecond notch 472 of thecam 436 engages the distal end of thestem 480, holding thepiston 474 in sealing engagement with theopening 428. - Referring to
FIG. 12 , thepiston guide assembly 476 includes anarrow holding assembly 488 coupled to a forward end of theelongate guide body 486. Thearrow holding assembly 488 includes an O-ring 490 sized and configured to be received within the securingmember 217 of thefletching 200 ofFIGS. 5 and 6 or within the securingmember 352 of thefletching 300 ofFIGS. 8 and 9 . The O-ring 490 is used to apply a sufficient amount of friction against the securing member such that the arrow will be retained in the barrel even when the distal end of the barrel is tilted down from a horizontal position. The O-ring 490 is selected so that it does not apply an excessive amount of friction against the securing member, such that the arrow can be disengaged from thearrow holding assembly 488 without a significant loss of energy once the compressed gas is released from the compressedgas storage chamber 422. - While the preferred embodiment of the invention has been illustrated and described, it will be appreciated that various changes can be made therein without departing from the spirit and scope of the invention.
Claims (30)
1. A gun for using compressed gas from a compressed gas cartridge to propel an arrow, the gun comprising:
(a) a barrel for receiving an arrow;
(b) a compressed gas storage chamber adapted to receive and store compressed gas in an expanded state from a compressed gas cartridge for later release; and
(c) a valve assembly for selectively releasing the compressed gas stored in the compressed gas storage chamber within the barrel for propelling the arrow out the barrel.
2. The gun of claim 1 , wherein the compressed gas storage chamber has a volume which exceeds a volume of the compressed gas cartridge by between about two to about twelve times.
3. The gun of claim 1 , further including a charge indicator in communication with the compressed gas storage chamber, the charge indicator having a raised position indicating a presence of the compressed gas in the compressed gas storage chamber and a lowered position indicating an absence of the compressed gas in the compressed gas storage chamber.
4. The gun of claim 3 , wherein the charge indicator is automatically transitioned from the lowered position to the raised position by a pressure exerted upon the charge indicator by the compressed gas.
5. The gun of claim 1 , further including an arrow holding assembly for releasably holding an arrow within the barrel prior to release of the compressed gas within the barrel and for releasing the arrow once the compressed gas is released within the barrel.
6. A gun for using compressed gas to propel a standard length arrow:
(a) a barrel of a length about 22 inches or greater for receiving a standard length arrow within the barrel; and
(b) a valve assembly for selectively releasing a compressed gas from a compressed gas source into the barrel for propelling the standard length arrow out of the barrel.
7. The gun of claim 6 , wherein the barrel is about 28 inches or greater in length.
8. The gun of claim 6 , wherein the barrel is about 30 inches or greater in length.
9. The gun of claim 6 , further including a compressed gas storage chamber for receiving and storing the compressed gas from the compressed gas source for later release by the valve assembly into the barrel.
10. The gun of claim 9 , wherein the compressed gas source is a compressed gas cartridge of a selected volume, and wherein the storage chamber has a volume exceeding the selected volume of the compressed gas cartridge such that the compressed gas is permitted to expand and be held in an expanded state prior to being released into the barrel by the valve assembly.
11. A method of propelling an arrow from a gun having a barrel, a trigger, and a compressed gas storage chamber, the method comprising:
(a) placing an arrow in the barrel;
(b) discharging a compressed gas into the compressed gas storage chamber for storage therein; and
(c) activating the trigger to cause the compressed gas to be released from the compressed gas storage chamber into the barrel to cause the arrow to be propelled from the barrel.
12. The method of claim 11 , wherein the arrow is 22 inches or greater in length.
13. The method of claim 11 , further including discharging the compressed gas from a compressed gas cartridge into the compressed gas storage chamber.
14. The method of claim 13 , wherein a volume of the compressed gas storage chamber exceeds a volume of the compressed gas cartridge by about two to about twelve times.
15. A fletching adapted to be attached to a proximal end of an arrow shaft to aid in the propelling of the arrow shaft by compressed gas out of a barrel having an inner diameter defined by an inner surface of the barrel, the fletching comprising:
(a) an attachment member adapted to couple the fletching to a proximal end of an arrow shaft; and
(b) an elongate body coupled to the attachment member, the elongate body having a sealing member having an outer diameter substantially equal to the inner diameter of the barrel such that the sealing member impedes at least a substantial portion of the compressed gas from flowing past the sealing member when the sealing member is in the barrel.
16. The fletching of claim 15 , wherein the sealing member is non-removably coupled to the attachment member.
17. The fletching of claim 15 , wherein the sealing member is removably attached to the attachment member such that during flight, the sealing member is adapted to separate and fall off from the attachment member by air resistance forces acting on the sealing member.
18. The fletching of claim 15 , wherein the sealing member is substantially dome shaped.
19. The fletching of claim 15 , wherein the sealing member has a substantially round outer perimeter.
20. The fletching of claim 15 , wherein an outer perimeter of the sealing member has a diameter that is a predetermined distance less than the inner diameter of the barrel so that a selected portion of the compressed gas may pass by the outer perimeter of the sealing member during use.
21. The fletching of claim 15 , further including a plurality of fins coupled to the elongate body, wherein the plurality of fins are helically disposed upon the elongate body so that the plurality of fins cause the fletching to rotate about a center axis of the fletching during flight.
22. A fletching adapted to be attached to a proximal end of an arrow shaft to aid in propelling of the arrow shaft by compressed gas out of a barrel of a gun, the fletching comprising:
(a) an elongate body adapted to be coupled to an arrow shaft;
(b) a plurality of fins extending outward from the elongate body to a selected distance from a centerline of the elongate body; and
(c) wherein the elongate body has a sealing member for blocking gas flow, the sealing member extending outward from the centerline to at least the selected distance for blocking gas flow.
23. The fletching of claim 22 , wherein the sealing member is adapted to separate and fall off from the arrow shaft by air resistance forces acting on the sealing member during flight of the arrow shaft.
24. The fletching of claim 22 , wherein the sealing member is substantially dome shaped.
25. The fletching of claim 22 , wherein the plurality of fins are helically disposed upon the elongate body.
26. A fletching adapted to be attached to a proximal end of an arrow shaft to aid in propelling of the arrow shaft by compressed gas out of a barrel of a gun, the fletching comprising:
(a) an elongate body adapted to be coupled to an arrow shaft; and
(b) a sealing member attached to the elongate body for substantially impeding gas flow past the sealing member when the fletching is disposed in a barrel of a gun, the sealing member extending outward from a centerline of the fletching to a diameter of about ½ an inch or greater.
27. The fletching of claim 26 , wherein the sealing member is adapted to separate and fall off from the arrow shaft by air resistance forces acting on the sealing member during flight of the arrow shaft.
28. The fletching of claim 26 , wherein the sealing member is substantially dome shaped.
29. The fletching of claim 26 , wherein the plurality of fins are helically disposed upon the elongate body.
30. The fletching of claim 26 , wherein the diameter of the fletching is about 7/10 of an inch or greater.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US11/038,684 US20050188979A1 (en) | 2004-01-15 | 2005-01-18 | Arrow gun method and apparatus |
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US53676104P | 2004-01-15 | 2004-01-15 | |
US11/038,684 US20050188979A1 (en) | 2004-01-15 | 2005-01-18 | Arrow gun method and apparatus |
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US20050188979A1 true US20050188979A1 (en) | 2005-09-01 |
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US11/038,684 Abandoned US20050188979A1 (en) | 2004-01-15 | 2005-01-18 | Arrow gun method and apparatus |
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WO (1) | WO2005069929A2 (en) |
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US20110146646A1 (en) * | 2009-12-18 | 2011-06-23 | Fx Airguns Ab | Gun using compressed gas to propel an arrow |
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CN102405175A (en) * | 2009-04-03 | 2012-04-04 | Dcns公司 | Anchoring harpoon, for example for an aircraft, and anchoring system including one such harpoon |
US20130055504A1 (en) * | 2011-09-06 | 2013-03-07 | Douglas E. Peash | Pneumatic lifting cushion |
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US9546844B2 (en) | 2014-07-29 | 2017-01-17 | Ardesa, S.A. | Converted muzzleloader arrow gun |
US20170016694A1 (en) * | 2015-07-16 | 2017-01-19 | Crosman Corporation | Arrow gun with controlled retention force and barrel vibration damping |
WO2019226541A1 (en) * | 2018-05-21 | 2019-11-28 | Smartplugs Corporation | Hypersonic pneumatic gun |
US10921103B2 (en) | 2014-06-27 | 2021-02-16 | Shooting Edge Technology, LLC | Air driven projectile |
US20220178645A1 (en) * | 2020-09-26 | 2022-06-09 | Bill Whistler Kenworthy | Launch and acceleration system and method |
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US8210161B2 (en) | 2009-05-18 | 2012-07-03 | Mattos Robert | Compressed gas powered projectile gun |
DE102020007206A1 (en) * | 2020-11-25 | 2022-05-25 | Lothar Klick | Missile, in particular in the form of an arrow, for launching by a launching device and launching system |
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US20070186916A1 (en) * | 2004-06-15 | 2007-08-16 | Smart Parts, Inc. | Grip routed gas supply for a paintball gun |
CN102405175A (en) * | 2009-04-03 | 2012-04-04 | Dcns公司 | Anchoring harpoon, for example for an aircraft, and anchoring system including one such harpoon |
US20120091272A1 (en) * | 2009-04-03 | 2012-04-19 | Dcns | Harpon d'ancrage par exemple d'un aeronef et systeme d'ancrage comportant un tel harpon |
US8783608B2 (en) * | 2009-04-03 | 2014-07-22 | Dcns | Aircraft anchoring harpoon with jack connected to pressurized gas source |
US20110146646A1 (en) * | 2009-12-18 | 2011-06-23 | Fx Airguns Ab | Gun using compressed gas to propel an arrow |
US8087406B2 (en) * | 2009-12-18 | 2012-01-03 | Fx Airguns Ab | Gun using compressed gas to propel an arrow |
US20110290227A1 (en) * | 2010-05-26 | 2011-12-01 | Mark Williford | Apparatus and method for adapting a pneumatic gun to fire from a fluid source |
US8286620B2 (en) * | 2010-05-26 | 2012-10-16 | Mark Williford | Apparatus and method for adapting a pneumatic gun to fire from a fluid source |
US20130055504A1 (en) * | 2011-09-06 | 2013-03-07 | Douglas E. Peash | Pneumatic lifting cushion |
US10921103B2 (en) | 2014-06-27 | 2021-02-16 | Shooting Edge Technology, LLC | Air driven projectile |
US11674780B2 (en) * | 2014-06-27 | 2023-06-13 | Shooting Edge Technology, LLC | Air driven projectile |
US9546844B2 (en) | 2014-07-29 | 2017-01-17 | Ardesa, S.A. | Converted muzzleloader arrow gun |
WO2016210364A1 (en) * | 2015-06-26 | 2016-12-29 | Shooting Edge Technolgy, Llc | Air driven projectile |
US20220307793A1 (en) * | 2015-07-16 | 2022-09-29 | Crosman Corporation | Arrow gun with controlled retention force and barrel vibration damping |
US20170016694A1 (en) * | 2015-07-16 | 2017-01-19 | Crosman Corporation | Arrow gun with controlled retention force and barrel vibration damping |
US20170131060A1 (en) * | 2015-07-16 | 2017-05-11 | Crosman Corporation | Arrow gun with controlled retention force and barrel vibration damping |
US9851173B2 (en) * | 2015-07-16 | 2017-12-26 | Crosman Corporation | Arrow gun with controlled retention force and barrel vibration damping |
US9933231B2 (en) * | 2015-07-16 | 2018-04-03 | Crosman Corporation | Arrow gun with controlled retention force and barrel vibration damping |
US10408564B2 (en) * | 2015-07-16 | 2019-09-10 | Crosman Corporation | Arrow gun with controlled retention force and barrel vibration damping |
US10845155B2 (en) * | 2015-07-16 | 2020-11-24 | Crosman Corporation | Arrow gun with controlled retention force and barrel vibration damping |
US11768054B2 (en) * | 2015-07-16 | 2023-09-26 | Crosman Corporation | Arrow gun with controlled retention force and barrel vibration damping |
US11378353B2 (en) * | 2015-07-16 | 2022-07-05 | Crosman Corporation | Arrow gun with controlled retention force and barrel vibration damping |
WO2019226541A1 (en) * | 2018-05-21 | 2019-11-28 | Smartplugs Corporation | Hypersonic pneumatic gun |
US11098977B2 (en) | 2018-05-21 | 2021-08-24 | Smartplugs Corporation | Hypersonic pneumatic gun |
US20220178645A1 (en) * | 2020-09-26 | 2022-06-09 | Bill Whistler Kenworthy | Launch and acceleration system and method |
Also Published As
Publication number | Publication date |
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WO2005069929A2 (en) | 2005-08-04 |
WO2005069929A3 (en) | 2007-04-19 |
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Legal Events
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