| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 21 | Firearm Pre-Muzzle Lead Emission Containment Device | US12050848 | 2008-03-18 | US20090235568A1 | 2009-09-24 | Douglas Alan Auvine |
| A device for limiting, controlling, and disposing of lead particles released from a firearm's openings and leakage areas rear of the muzzle. The device is composed of a cylindrical clear polycarbonate enclosure mounted on an aluminum frame which encloses the firearm and the shooters hands. A small opening at the rear of the cylinder allows the firearm muzzle to discharge the projectile. A restricted opening at the front of the cylinder allows the shooter to place hands and firearm within the enclosure. The clear Polycarbonate provides light entry and visibility while affording the shooter some protection against a malfunctioning firearm. The enclosure is under negative air pressure in relation to the environment outside the enclosure. The negative air pressure is provided by either the bullet retention system that the device is mounted to or separately by a connection to a commercially available High Efficiency Particulate Air (HEPA) filter vacuum. | ||||||
| 22 | Tubular-magazine automatic firearm | US28022239 | 1939-06-21 | US2282903A | 1942-05-12 | SWEBILIUS CARL G |
| 23 | IN BORE AIR REGULATION SYSTEM | PCT/US2004006980 | 2004-03-08 | WO2005024334A2 | 2005-03-17 | BORGWARTH DENNIS W; REVOLINSKI JOHN F; HELLWIG CHAD L; IRELAND JEFFREY V |
| A weapon system having a gun barrel and an in bore air regulation system. The gun barrel has a first end and a second end. The gun barrel has a bore formed therein that extends from the first end towards the second end. The bore is adapted to receive a round. The in bore air regulation system is operably attached to the gun barrel so that the in bore air regulation system is in communication with the bore to regulate air pressure in the bore and thereby control the position of the round in the bore. | ||||||
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