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Publication numberUS20070272222 A1
Publication typeApplication
Application numberUS 11/439,240
Publication dateNov 29, 2007
Filing dateMay 24, 2006
Priority dateMay 24, 2006
Publication number11439240, 439240, US 2007/0272222 A1, US 2007/272222 A1, US 20070272222 A1, US 20070272222A1, US 2007272222 A1, US 2007272222A1, US-A1-20070272222, US-A1-2007272222, US2007/0272222A1, US2007/272222A1, US20070272222 A1, US20070272222A1, US2007272222 A1, US2007272222A1
InventorsLin Ching Ho
Original AssigneeLin Ching Ho
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Air gun chamber structure
US 20070272222 A1
Abstract
An air gun chamber structure is composed of a valve seat, a valve, a valve cap screw, a nozzle, a nozzle seat, and related fittings. The valve seat is divided into two parts by a baffle, the valve is limited to a rear side of the valve seat by the valve cap screw, and the nozzle is limited to a front side of the valve seat by the nozzle seat. A pillar at a front end of the valve is transfixed into a vent-hole at a center of the baffle and is inserted into an opening at a rear end of the nozzle, an outer wall of the valve is provided with an indent section, at a position where the valve passes through the vent-hole, and a proper notch part is located at a portion of rear end of the valve which is inserted into an air hole at a center of the valve cap screw. In normal times, the rear end of valve is kept at being tightly connected into the air hole. Accordingly, after the valve is subjected to an impact, a time difference will be formed that a bullet will be ejected first prior to pulling back a slide.
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Claims(1)
1. An air gun chamber structure including a valve seat, a valve, a valve cap screw, a nozzle, a nozzle seat, and related fittings; the valve seat being made into a sleeve-shape, being installed in an interior of an action, a front end of the valve seat being connected to a bullet supplying chamber, a rear end of the valve seat being connected to a slide, inner walls of openings at a front and rear end of the valve seat being all provided with thread parts, and an interior of the valve seat being divided into two parts by a baffle having a vent-hole at its center; the valve being limited to a space at a rear of the baffle of valve seat by the valve cap screw, whereas the nozzle being limited to a space at a front of the valve seat by the nozzle seat; a center of end surface at a front of the valve being protruded forward with a pillar, a proper position on an outer wall of front section of the valve being installed with an indent section, and a proper position on an outer wall at a rear end of the valve being installed with a flange having an inverted cone surface facing toward the valve cap screw; a center of the flange being provided with a pillar to be tightly connected with the valve cap screw; a proper position on the pillar being installed with a notch part; a valve axis spring, a valve O-ring washer, and a valve axis O-ring being orderly sheathed at the front section of the valve, followed by being emplaced into the valve seat, such that the pillar at the front end will be transfixed into the vent-hole at the center of baffle of valve seat; a center of the valve cap screw being opened with a penetrated air hole in a diameter which is corresponding to that of the rear end of valve, an outer wall of the valve cap screw being installed with a thread part and a slot ring which are correspondingly screwed with the valve seat, a front end surface of the valve cap screw being extended forward with a projected tube, and a rear end surface of the valve cap screw being installed with a flange; an end surface of the flange being installed with a groove for inserting with a tool; an interior of slot ring being installed with a valve cap O-ring, and an outer wall of projected tube being sheathed with a valve cap O-ring washer; when the valve being limited to the rear end of valve seat by the valve cap screw, the rear end of valve being inserted into the air hole of valve cap screw to be screwed together, such that the flange of valve is tightly connected on the valve cap O-ring washer of valve cap screw in normal times; the nozzle being a stage-shape tube cap, and its center position being opened with a through-hole to be inserted with the pillar at the front end of valve; a nozzle O-ring and a nozzle spring being orderly sheathed at the front of nozzle, followed by being emplaced into the valve seat; the nozzle seat being in a shape of tube cap, and a center of its closed end surface being opened with an opening in a diameter corresponding to that of the front end of nozzle; an outer wall of nozzle seat being installed with a thread part which is correspondingly screwed with the valve seat; when the nozzle being limited to the front end of valve seat by the nozzle seat, the front end of nozzle tube being inserted into the opening of nozzle seat to be screwed together, such that the pillar of valve is inserted into the through-hole of nozzle, in normal times.
Description
    BACKGROUND OF THE INVENTION
  • [0001]
    a) Field of the Invention
  • [0002]
    The present invention relates to an air gun chamber structure, and more particularly to a chamber structure which provides for storing air in an air gun, supplies power to shoot a bullet, and supplies power to pull back a slide of gun barrel after shooting.
  • [0003]
    b) Description of the Prior Art
  • [0004]
    Although an air gun is not a real gun, almost all of the exiting air guns are imitated to have sophisticated appearance like the real gun, along with an advancement of technology of making a gun, in recent years. In addition to having an emulated appearance, the air gun is also provided with all kinds of exceptional performances and its design is becoming more and more superior; whether a large rifle gun, an automatic pistol, or a revolver, they can all be made from the air gun. In addition to shooting the bullet, all kinds of characteristics of firearms can be simulated in the air gun, such as a cocking of striking hammer, a movement of slide toward a front and rear, or even a smoke upon ejecting a shell. Usually, a simpler firearm is only provided with functions of shooting the bullet and moving the slide forward and backward, as disclosed in the U.S. Pat. No. 6,026,797 “Air Gun.” Referring to FIG. 1 and FIG. 2, an interior of action is installed with a valve seat a, a valve b, a valve cap screw c, a nozzle d, a nozzle seat e, and related fittings. A front end of the valve seat a is connected to a bullet supplying chamber, a rear end is connected to a slide, and the valve seat a is divided into two parts by a baffle al installed in an interior of the valve seat a. The valve b is limited to a, rear end of the valve seat a by the valve cap screw c, whereas the nozzle d is limited to a front end of the valve seat a by the nozzle seat e. In addition, a cone-shape head b1 at a front end of the valve b is transfixed into a vent-hole d1 at a center of the nozzle d, and an interior of the valve b is opened with a penetrated vent-hole b2 which discharges air through an air hole b11 at a side of the cone-shape head b1 of valve b, and takes in the air from an air hole b3 which is located at a rear end of the valve b and is tightly assembled on a front end of the valve cap screw c. Therefore, when the striking hammer impinges on a hit pin b4 at a rear end of the valve b, a joint place between the valve b and the valve cap screw c will be opened at the same time, such that the air will be blown out of the air hole b11 at the front end to push the nozzle d at the front end to move, into the valve b through the vent-hole b2 in an interior of the valve b. As a part of the air will be ejected out of the vent-hole d1 of nozzle d to push out a bullet, and the air will be also ejected out of a clearance between a rear end of the valve b and the valve cap screw c, the slide will be pulled back. However, this kind of simultaneously discharging the air at the front end and the rear end will inevitably disperse the air pressure to affect a thrust when the bullet is ejected. Even that just prior to ejecting the bullet, a certain amount of vibration will be incurred by a relative sliding between the slide on a gun barrel and a gun body, so as to result in a shaking to the gun body, thereby affecting a trajectory and accuracy of the ejected bullet. As these drawbacks are not appreciated by consumers, an improvement is required.
  • [0005]
    Accordingly, a brand new air gun chamber structure is designed, wherein a clearance is created at a joint place between a valve seat and a valve, by an impulse of impact resulting from an impinging on the valve with a striking hammer, so as to continuously push the valve forward to a clearance between a notch part at its rear end and a valve cap screw, by the air pressure. After that, the air is charged into a slide which will then be pulled back, in order to simulate a status that the slide will be slid backward upon using a real gun. By the design of valve structure of present invention, a proper difference will be formed between a time of ejecting the bullet and that of pulling back the slide, which will not cause a shaking to the gun body to affect a trajectory and accuracy of the ejected bullet, due to a simultaneous operation of air pressure.
  • SUMMARY OF THE INVENTION
  • [0006]
    The primary object of present invention is to provide an air gun chamber structure to simulate a status in using a real gun, wherein its internal air pressure will not be operating at the same time, so as to form a proper difference between a time of ejecting a bullet and that of driving a slide to move backward, without affecting a trajectory of accuracy of the ejected bullet.
  • [0007]
    Accordingly, an air gun chamber structure of the present invention comprises a valve seat, a valve, a valve cap screw, a nozzle, a nozzle seat, and related fittings, wherein the valve seat is divided into two parts by a baffle, the valve is limited to a space at a rear of the valve seat baffle by the valve cap screw, the nozzle is limited to a space at a front of the valve seat by the nozzle seat, and a center of the baffle is opened with a vent-hole. A pillar at a front end of valve can be transfixed into the vent-hole and inserted into an opening at a rear end of nozzle. In addition, an outer wall of the valve is provided with an indent section at a position where the valve passes through the vent-hole, a proper notch part is located at a portion of rear end of the valve which is inserted into an air hole at a center of the valve cap screw, and the rear end of valve is kept at being tightly assembled into the air hole in normal times.
  • [0008]
    According to the aforementioned structures, after the rear end of valve is subjected to an impact by a striking hammer to move the valve forward, a flange at a rear end of the valve will be moved forward by a pushing of air which enters into the valve seat. When the indent section of valve passes through the vent-hole of valve seat, a clearance will be created, which will prohibit the air pressure to be unleashed and enable the air to be discharged from the clearance, thereby ejecting the bullet and pushing the nozzle forward at the same time. Within the same time, the valve is still moving forward continuously, until the notch part at the rear end of valve moves to a position relative to the air hole at the center of valve cap screw to create a clearance. When a gap for unleashing the pressure occurs at a rear end of the valve, the air pressure at a rear end of the valve seat will be charged backward into the slide instantly, to pull back the slide. When the air pressure inside the valve seat gradually decreases to be less than a restoring force of spring, the valve and the nozzle can be restored to their original positions by springs which are sheathed on the valve and the nozzle, thereby forming a constant mode of reciprocated motions. Accordingly, the air pressure inside the valve seat will not be operating simultaneously by the chamber of present invention, and a direction of air flow will be changed by a change of apertures between the indent section at the front end of valve and the vent-hole of valve seat, as well as between the notch part at the rear end of valve and the air hole of valve cap screw, which results in a proper difference between the time of ejecting the bullet and that of driving the slide to move backward, without affecting the trajectory and accuracy of the ejected bullet.
  • [0009]
    To enable a further understanding of the said objectives and the technological methods of the invention herein, the brief description of the drawings below is followed by the detailed description of the preferred embodiments.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0010]
    FIG. 1 shows a schematic view of a conventional chamber in a closed status.
  • [0011]
    FIG. 2 shows a schematic view of a status of a conventional chamber after being subjected to an impact.
  • [0012]
    FIG. 3 shows an exploded view of the present invention.
  • [0013]
    FIG. 4 shows a cutaway view of the present invention after being assembled.
  • [0014]
    FIG. 5 shows a schematic view of a status of the present invention after being subjected to an impact.
  • [0015]
    FIG. 6 shows a second schematic view of a status of the present invention after being subjected to an impact.
  • [0016]
    FIG. 7 shows a schematic view of the present invention in a closed status.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • [0017]
    Referring to FIG. 3 and FIG. 4, an air gun chamber structure of the present invention comprises a valve seat 10, a valve 20, a valve cap screw 30, a nozzle 40, a nozzle seat 50, and related fittings.
  • [0018]
    The valve seat 10 is made into a sleeve-shape and is installed in an interior of action, with its front end being connected to a bullet supplying chamber, and its rear end being connected to a slide. Inner walls of openings at a front and rear end of the valve seat 10 are all provided with thread parts 11, and an interior of the valve seat 10 is divided into two parts by a baffle 12 which is opened with a vent-hole 12 a at a center, so as to limit the valve 20 to a space at a rear of the baffle 12 a of valve seat 10 by the valve cap screw 30 and to limit the nozzle 40 to a space at a front of the valve seat 10 by the nozzle seat 50.
  • [0019]
    A center of end surface at a front side of the valve 20 is protruded forward with a pillar 21, a proper position on an outer wall at a front section of valve 20 is installed with an indent section 22, a proper position on an outer wall at a rear end of valve 20 is installed with a flange 23 which is provided with an inverted cone surface facing toward the valve cap screw 30, a center of the flange 23 is installed with a pillar 23 a to be tightly connected with the valve cap screw 30, and a proper position on the pillar 23 a is provided with a notch part 23 a 1. A valve axis spring 24, a valve O-ring washer 25, and a valve axis O-ring 26 are orderly sheathed at the front section of the valve 20, and are then emplaced into the valve seat 10, whereas the pillar 21 at the front end of valve 20 will be transfixed into the vent-hole 12 a at the center of baffle 12 of valve seat 10.
  • [0020]
    A center of the valve cap screw 30 is opened with a penetrated air hole 31 in a diameter corresponding to that of the rear end of valve 20. An outer wall of the valve cap screw 30 is installed with a thread part 32 and a slot ring 33 which are correspondingly screwed with the valve seat 10. A front end surface of the valve cap screw 30 is extended forward with a projected tube 34, and a rear end surface of the valve cap screw 30 is installed with a flange 35. An end surface of the flange 35 is provided with a groove 35 a for inserting with a tool, an interior of slot ring 35 a is installed with a valve cap O-ring 36, and an outer wall of projected tube 34 is sheathed with a valve cap O-ring washer 37. When the valve 20 is limited to the rear end of valve seat 10 by the valve cap screw 30, the rear end of valve 20 is inserted into the air hole 31 of valve cap screw 30 to be screwed together, such that the flange 23 of valve 20 is tightly connected on the valve cap O-ring washer 36 of valve cap screw 30 in normal times.
  • [0021]
    The nozzle 40 is a stage-shape tube cap, and its center position is opened with a through-hole 41 to be inserted with the pillar 21 at the front end of valve 20. A nozzle O-ring 42 and a nozzle spring 43 are orderly sheathed at a front of the nozzle 40, and then are emplaced into the valve seat 10.
  • [0022]
    The nozzle seat 50 is in a shape of tube cap, its center of closed end surface is installed with an opening 51 in a diameter corresponding to that of the front end of nozzle 40, and an outer wall of nozzle seat 50 is installed with a thread part 52 which is correspondingly screwed with the valve seat 10. When the nozzle 40 is limited to the front end of valve seat 10 by the nozzle seat 50, the front end of nozzle 40 tube is inserted into the opening 51 of nozzle seat 50 to be screwed together, such that the pillar 21 of valve 20 is inserted into the through-hole 41 of nozzle 40, in normal times.
  • [0023]
    Referring to FIGS. 5 to 7, after the valve 20 is moved forward due to that its rear end is subjected to an impact by a striking hammer, the flange 23 at the rear end of valve 20 will be moved forward by a push of the air which enters into the valve seat 10. When the indent section 22 of valve 20 passes through the vent-hole 12 a of valve seat 10, a clearance will be created, allowing the air to be blown into the clearance. At this time, the air will be moved forward to be flowing into the front end of valve seat 10 to eject out the bullet and to push the nozzle 40 forward simultaneously, by using a fact that the air pressure at the rear end is greater than that at the front end of valve seat 10. Within this period of time, the valve 20 is still moving forward continuously, until the notch part 23 a 1 at the rear end of valve 20 moves to a position relative to the air hole 31 at the center of valve cap screw 30. As an aperture formed by the notch part 23 a at the rear end of valve 20 is greater than that between the vent-hole 12 a at the front end and the indent section 22 of valve 20, the air will be flowing toward the rear end of valve seat 10 instead and passing through the air hole 31, and next will be entering into the slide to pull it back. When the air pressure inside the valve seat 10 gradually decreases, the structures will be restored to their original positions by using restoring forces of the valve axis spring 24 sheathed on the valve 20, and the nozzle spring 43 of nozzle 40, thereby forming a constant mode of reciprocated motions.
  • [0024]
    Accordingly, in the air gun chamber structure of present invention, a change of aperture between the valve and the valve seat is utilized to prohibit the internal air pressure to be operating simultaneously, so as to form a proper difference between the time of ejecting the bullet and that of driving the slide to move backward, without affecting the trajectory and accuracy of the ejected bullet.
  • [0025]
    It is of course to be understood that the embodiments described herein is merely illustrative of the principles of the invention and that a wide variety of modifications thereto may be effected by persons skilled in the art without departing from the spirit and scope of the invention as set forth in the following claims.
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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7913679Mar 29, 2011Kee Action Sports I LlcValve assembly for a compressed gas gun
US8256406 *Jun 1, 2011Sep 4, 2012Kevin KirkpatrickSystems and methods for regulating pneumatic gas propulsion
US8434465 *Jul 24, 2009May 7, 2013Crosman CorporationBlowback assembly
US20090013984 *Jun 18, 2008Jan 15, 2009Regency Paintball HandelsbolagMarker mechanism
US20110017188 *Jul 24, 2009Jan 27, 2011Crosman Corporationblowback assembly
WO2012166130A1 *Jun 1, 2011Dec 6, 2012Kevin KirkpatrickSystems and methods for regulating pneumatic gas propulsion
Classifications
U.S. Classification124/73
International ClassificationF41B11/00
Cooperative ClassificationF41B11/723
European ClassificationF41B11/72