| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 261 | Sub-caliber firearm | US165532 | 1988-03-08 | US4907362A | 1990-03-13 | Edward H. Hobbie |
| A sub-caliber automatic pistol of the double-action breech block type incorporates a frame having barrel-mounting ribs, a handle, a barrel-receiving slide with integral breech block, a firing mechanism of a larger caliber pistol, and a magazine adapted for storing a plurality of sub-caliber cartridges. The pistol includes an interchangeable barrel terminating rearwardly in a downwardly descending lug having an integral feed ramp defining a cartridge path for the larger caliber cartridges. A feed spacer is affixed to the barrel lug for defining a sub-caliber cartridge path which is elevated with respect to the first cartridge path. | ||||||
| 262 | Multipurpose repeating firearm having alternate firing mechanisms | US932564 | 1986-11-20 | US4821621A | 1989-04-18 | Carmelo Lorenzo |
| A relatively simple repeating firearm is disclosed which includes a sliding bolt which is removably housed within a firearm housing and which is biased into a bullet loading and firing position by means of springs provided in an overlapping fashion with a longitudinal extent of the bolt to thereby reduce the overall length of the firearm. A short stroke for the sliding bolt is provided to enable a rapid firing of the firearm. The sliding bolt and firing mechanism contained thereon are easily removed from the housing by a removable rear cover with the firearm accommodating different calibers of bullets by replacement of the sliding bolt as well as a removable barrel which contains the firing chamber therein. | ||||||
| 263 | Convertible shotgun | US569748 | 1984-01-10 | US4601123A | 1986-07-22 | Thomas F. Swearengen; Walter J. Makauskas |
| A sporting shotgun from which the stock and forearm have been removed is partially encapsulated within a clamshell housing assembly which includes a stock and pistol grip and which substantially alters the appearance of the shotgun. Projections within the housing assembly block a safety member on the gun in an inoperative position. A recoil beam attached to the receiver of the shotgun and contained with the butt end of the stock functions as a recoil absorber and also cooperates with a cup-shaped butt plate to retain the butt end portion of the housing in assembly. The trigger of the shotgun is encapsulated within the stock and connected by a trigger connecting assembly to an auxiliary trigger associated with the pistol grip. | ||||||
| 264 | Firearm and firearm conversion unit | US600113 | 1984-04-13 | US4580484A | 1986-04-08 | Wildey J. Moore |
| A unit is disclosed for use in converting a blowback autoloading pistol, such as a U.S. caliber .45 model 1911, into a gas operated one with the unit being adapted for connection to the receiver of the blowback pistol after its barrel and slide are removed. The unit comprises a shroud, a barrel and a gas activated piston for operating the bolt and its lock. The hammer, constituting part of the firing mechanism carried by the receiver, cooperates with the firing pin of the conversion unit in the same way as it did with the firing pin of the autoloading pistol. Instead of being used to effect a conversion, the structure involved in the conversion unit can also be used in making a completely new gas operated pistol or other firearm. | ||||||
| 265 | Pistol structure | US513375 | 1983-07-13 | US4542606A | 1985-09-24 | George Hoenig |
| A gun conversion assembly for application to the receiver of an automatic pistol having a handle containing a recess into which a magazine holding a series of rounds of ammunition is insertible, the conversion assembly including a barrel to be secured to the receiver, and a connector structure having a portion which is adapted to be located within the magazine recess in the receiver handle and which acts to secure the barrel rigidly to the receiver. The connector structure may extend downwardly through the recess to the bottom of the receiver handle and have elements at the lower end of the handle tightenable to progressively pull the receiver downwardly into tightly contacting engagement with the upper end of the receiver. The connector structure may also include an expansible combination of parts acting upon the exertion of downward force on the barrel retaining structure to expand laterally to an increased width in a relation tightly bearing against opposite side walls of the receiver recess and enhancing the overall connection between the barrel and receiver. A slide movably mounted to the receiver may be limited in its movement by a detent element carried by the slide and manually releasable to permit removal of the slide from the receiver while the barrel remains attached thereto. | ||||||
| 266 | Machine gun adaptor | US401844 | 1982-07-26 | US4531446A | 1985-07-30 | Steven C. VanVoorhees |
| An apparatus for converting an automatic firearm of high caliber including a frame, a receiver mounted on the frame, a barrel mounted on the receiver, a bolt disposed on the receiver telescopically moveable relative to the breech end of the barrel against the action of a recoil spring, and the bolt being controlled by a sear which is movable in response to the movement of the weapon trigger and a disconnect lever, to a low caliber automatic firearm is disclosed. The apparatus for conversion includes a frame disposed in the receiver of the firearm, a low mass bolt assembly including a bolt carrier, a bolt, and a sear foot disposed in sliding contact with the frame. A pivotable camming lever is attached to the frame and pivots in response to impact from the bolt carrier. The camming lever provides sufficient mechanical advantage to enable the forward impact of the low mass bolt assembly to depress the disconnect lever on the original weapon. A conversion barrel is provided and a floating chamber is also provided to enhance the recoil power of the low caliber round. | ||||||
| 267 | Conversion kit for assault rifle and converted rifle of compact configuration | US373248 | 1982-04-29 | US4463654A | 1984-08-07 | Thomas J. Barnes; William H. Parry |
| An assault rifle is converted from an original to a modified configuration having a remote trigger located forwardly of the magazine by mounting a remote forward trigger to the original rifle by means of a pair of shroud pieces which cradle the rifle's receiver, replacing the original removable trigger of the assault rifle with a replacement lever, providing a cam element movable within cam guides defined in the shroud pieces and connecting the cam element to the remote forward trigger so as to move the cam into engagement with the replacement lever upon actuation of the remote forward trigger. The parts required for conversion are readily detachable from the rifle to thereby return the weapon to its original configuration. | ||||||
| 268 | Rifle bolt assemblies | US183163 | 1980-09-02 | US4358986A | 1982-11-16 | Charles Giorgio |
| A rifle having a body comprised of hingedly interconnected lower and upper receivers, a trigger and hammer assembly mounted in the lower receiver, a barrel extending from one end of the upper receiver, an integrated bolt assembly removably mounted in the upper receiver, the bolt assembly comprising a bolt carrier slidably mounted on two action rods joined at corresponding first ends by an action plate, the action rods being releasably supported at corresponding ends in the rifle body, a bolt slidably mounted in the bolt carrier, a firing pin slidably mounted in the bolt, compression springs between the action plate and the bolt carrier and retaining means on the action rods to retain the bolt carrier on the action rods and retain the members of the bolt assembly integrated so the bolt assembly can be removed from the upper receiver as a complete unit. | ||||||
| 269 | Automatic and semiautomatic small caliber conversion system | US917917 | 1978-06-22 | US4231177A | 1980-11-04 | John P. Foote |
| An automatic and semiautomatic small caliber conversion system for automatic or semiautomatic shotguns and rifles such as, for example, M-16 and AR-16 rifles including a uniquely designed three element structure and associated ammunition feeding means to permit the use of smaller caliber, inexpensive ammunition in rilfes and shotguns designed originally for larger caliber ammunition. The system includes a bolt/receiver assembly which easily replaces the bolt carrier of the, for example, M-16 rifle, and a magazine assembly which can be inserted by hand into any standard, for example, 0.223 round M-16 magazine. The bolt/receiver assembly is made up of three sub-assemblies, a receiver, a bolt, and a recoil spring. The receiver sub-assembly includes a section of a circle with a short barrel section in the front which fits into the M-16 chambers, a receiver lug at top rear to locate it within the M-16 chamber and prevent its rotary or linear motions and a guide rail. The bolt sub-assembly is cylindrical in shape, is guided by the adapter receiver guide rail and is encompassed by the M-16 receiver so that its only free movement is front to rear for ejecting and chambering cartridges. The recoil spring sub-assembly consists of a guide rod and spring. The spring is to return the bolt to battery after firing and also to hold the guide rod into a hole in the receiver lug. The recoil spring sub-assembly holds the receiver and bolt together as an assembly. | ||||||
| 270 | Weapon conversion apparatus | US830607 | 1977-09-06 | US4169329A | 1979-10-02 | Maxwell G. Atchisson |
| Apparatus for converting a firearm of a first caliber to fire cartridges of a second caliber. The regular bolt assembly of the firearm is removed and replaced with a conversion bolt assembly having a flat receiver plate which is bifurcated to provide a pair of flat rails. A bolt assembly is supported for movement along the rails, out of contact with the receiver of the firearm. The receiver plate of the conversion bolt assembly extends forwardly from a backplate which accurately locates the conversion assembly within the firearm, and the receiver plate is tilted to clear the conventional ejection port of the firearm. The conversion bolt assembly includes an automatic sear trip which enables full-automatic firing of second caliber cartridges on firearms that are so equipped, and also includes a weight for improved full-automatic operation. The disclosed embodiment is designed for use with an M-16 or AR-15 rifle. | ||||||
| 271 | Sub-caliber conversion unit | US3772812D | 1973-03-26 | US3772812A | 1973-11-20 | DAY R |
| A sub-caliber conversion unit adapted to be detachably secured to and firmly supported by the lower receiver group of a larger caliber pistol, wherein the slide in such conversion unit operates independently of the barrel, and means are provided to permit full travel of said slide.
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| 272 | Sub-caliber conversion unit | US3724326D | 1971-07-29 | US3724326A | 1973-04-03 | DAY R |
| A sub-caliber conversion unit adapted to be detachably secured to and firmly supported by the lower receiver group of a larger caliber pistol, wherein the slide in such conversion unit operates independently of the barrel, and means are provided to permit full travel of said slide.
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| 273 | Method of making firearms having interchangeable barrels | US3708841D | 1971-07-16 | US3708841A | 1973-01-09 | QUINNEY J |
| A firearm having interchangeable barrels wherein each barrel is attached to the receiver portion of the firearm and is prevented from relative rotation with respect thereto by a locking sleeve which fits over the barrel. The barrel is screwed into a threaded bore in the receiver of the firearm until its end face abuts a seating surface therein. The sleeve is then fitted over the barrel and screwed into the same bore in the receiver as the barrel until its end abuts the threaded portion of the barrel. Any tendency of the barrel to rotate out of the receiver is effectively prevented by the locking action of the sleeve.
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| 274 | Convertible machine gun for rightand left-hand cartridge feed and operation | US53870166 | 1966-03-30 | US3386336A | 1968-06-04 | ROY ROBERT E |
| 275 | Convertible gun | US26718363 | 1963-03-22 | US3198076A | 1965-08-03 | STONER EUGENE M |
| 276 | Firing mechanism with variable contact sear notch | US81421959 | 1959-05-19 | US3079718A | 1963-03-05 | ALLYN HAROLD D |
| 277 | Shotgun action | US85675159 | 1959-12-02 | US3077045A | 1963-02-12 | GROVES KATHERINE B |
| 278 | Automatic firing mechanism | US73324958 | 1958-05-02 | US3026777A | 1962-03-27 | WOODERSON III THOMAS R |
| 279 | Convertible revolver pistol | US47159921 | 1921-05-23 | US1411800A | 1922-04-04 | MOLLOY WILLIAM J |
| 280 | Firearm | US16517117 | 1917-04-28 | US1355417A | 1920-10-12 | PEDERSEN JOHN D |
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