Abstract:
An improved feed port for a pneumatic projectile device comprising a moveable feed port aperture attached to a pneumatic device through which projectiles can be introduced to the breech of the pneumatic device, the feed port having an aperture permitting the free flow of projectiles from an external source.

Description:
BACKGROUND OF THE INVENTION 
     The Improved Feed Port for Pneumatic Projectile Devices is designed to allow existing projectile devices with standard feed mechanisms, (the method for loading a projectile from a magazine into the breech of the device gun and commonly referred to in the industry as direct feeds and powerfeeds, depending upon the orientation of the feed port to the breech) to utilize new and emerging technologies which move the paintball magazine from a top loading, gravity-based feed mechanism to a bottom or side feed pneumatic and/or mechanically based feed mechanism. 
     Direct feed systems can take one of several configurations. However, each direct feed system currently on the market or which is a reasonable variation thereof, comprises the following features: 
     The axis of the direction of the feed is not parallel to the axis of the paintball gun&#39;s barrel. The projectiles drop directly into the breech from the feed and flow into the breech in the same direction as the main axis of the feed. 
     The feed is oriented to the breech so that when the paintball gun is held in a normal firing position, the breech is below the feed. 
     Power feed systems can take one of several different configurations. However, all configurations and variants thereof share the following features: 
     The axis of the direction of the feed is not parallel to the axis of the paintball gun&#39;s barrel The projectiles pass through the feed in a direction which is off-center from dropping directly into the breach and therefore must, under the influence of a device placed in the powerfeed, change direction in order to enter the breach. 
     Because of the different designs of the existing (and anticipated) feed methods, the multi-purpose feed adapter must necessarily be configured in several different ways in order to function properly. 
     Furthermore, it is anticipated by the designers that others may wish to modify existing projectile devices to operate in a manner similar to that as provided for in this application. In anticipation of that, a method for modifying existing guns to incorporate a non-gravity based feed system is included here. 
     SUMMARY OF THE INVENTION 
     Therefore, the improved feed port for pneumatic projectile devices has been designed to incorporate the beneficial features of a variety of different, previously utilized devices, enhances the utility of such devices by allowing them to be moved into different configurations and providing the feed port with the ability to accommodate new and emerging technologies which may or may not use gravity as their method of feeding projectiles into the breech. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  shows a top view of a conventional pneumatic projectile device, and references the location of a feed port  0  in a vertical configuration in relation to the receiver and breech of the pneumatic projectile device and feed port in a side or straight feed mounting. 
         FIG. 2  shows a top view of a conventional pneumatic projectile device with a feed port and a bolt (in shadow) extended to reach past the feed port and seal the breech. 
         FIG. 3  shows the Improved Feed Adapter mounted on the forward end of the receiver, the barrel mounted to the forward end of the Improved Feed Adapter, the ability of the adapter to move the location of the feed port and the set screw used to retain the housing in a fixed position. 
         FIG. 4  shows pneumatic projectile device receiver in an alternate embodiment of the device, fitted into a cavity in the body of the receiver. 
         FIG. 5  shows the preferred embodiment of the device illustrating the movement of the feed port, the housing containing the feed port aperture, the barrel fixed to the front of the feed port and the set screw for retaining the feed port in a fixed position. 
     
    
    
     DETAILED DESCRIPTION 
     One of the exemplary embodiments provides an improved feed port moveably attached to and integrated into the design of a pneumatic projectile device  15 . In general, a pneumatic projectile device  15  comprises a breech having a front end, a rear end, a main longitudinal passageway with a first opening at its front end, and a second opening in said passageway for entry of compressed gas into the passageway. The projectile device  15  further includes a means for supplying compressed gas from a source thereof to the second opening in the passage. 
     The pneumatic projectile device  15  also includes a gun handle connected to said receiver and a barrel  10  through which the pellets or balls are fed is connected to the front end of the breech. Also provided is a bolt or other means for moving the ball or pellet from the breech into the barrel, the operation of the bolt being actuated by the trigger mechanism. A valve mechanism or valve actuating mechanism or other mechanical, pneumatic or electronic mechanism is actuated by the operation of the trigger. The valve actuating mechanism is also capable of opening a gas valve mounted in the receiver upon demand. 
     The pneumatic projectile device may further comprise a gas valve system, the system including a sealed gas passageway connected to the second opening in the longitudinal passageway. The gas valve system is constructed to release compressed gas in order to fire a pellet or ball when the valve actuating mechanism is activated by a trigger. 
     A preferred embodiment provides for a trigger mounted to a lower portion of the breech, the trigger having a means for operating the valve actuating mechanism. The valve actuating mechanism also provides means for returning the trigger to a forward position upon release of the trigger as well as a means for sealing the opening in the side of the longitudinal passageway of the housing upon activation of the valve mechanism. 
     A preferred embodiment of the pneumatic projectile device  15  provides for an opening in the side of the longitudinal passageway of the housing of the pneumatic projectile device  15 . The pneumatic projectile device  15  is equipped with a tubular element of variable length attached either in a temporary or permanent manner; the tubular element comprising a body with a substantially circular passageway with a opening at its front end and a opening at its rear end. The opening at the rear end of the tubular element is in communication with the opening in the side wall of the housing, such that pellet or balls may freely move between the tubular element and the longitudinal passageway of the housing. Preferred embodiments also provide for a means for selectively fixing or unfixing the location of the feed port opening, said means being a collet, a set screw  45 , a latch arm or similar device. 
       FIG. 5  illustrates one preferred embodiment of the device and shows the pneumatic projectile device body  15  attached via a threaded adapter  55  to its front end, the movable collar  40  attached to the threaded adapter  55 , the forward adapter  55  into which the barrel  10  is attached, the feed tube attached to the aperture  20  and the set screw  45  which passes through the adapter and makes contact with the surface of collar  40  and prevents movement thereof. 
     In use, the adapter unit  55  is threaded onto the receiver of a pneumatic projectile device  15 , after which the barrel  10  is threaded onto the forward portion of the adapter  55 , the barrel  10 , the housing  55  and the pneumatic projectile device  15  becoming a single unit. The set screw  45  is then backed out, allowing the housing  40  to be rotated until the feed port aperture  20  is in the desired location, after which the set screw  45 , is tightened to prevent further movement of the housing  40 .