Chamber Nested Bolt and Oval Rifling

Abstract

A means of keeping the cartridge in the chamber during the firing sequence until the peak pressure drops to a safe level by nesting the bolt into the chamber with the cartridge. The bolt and cartridge will form a gas seal and recoil backwards when the gun is fired, but the chamber walls will support the cartridge while it recoils backwards until it exits. The gun will be designed so that it does not exit until the pressure drops to a level where the cartridge can withstand the force. Doing this will allow the gun to utilize high pressure ammunition without requiring complicated locking and/or delay mechanisms currently used. This will decrease the initial cost of manufacturing the gun, improve accuracy and reliability, and reduce the peak recoil felt from the gun. Also spinning a projectile by using an oval cross section where the major and minor axis rotates around the center of the oval eliminates the need for groves and polygonal rifling. This will increase the efficiency and the precision of the gun.

Claims

1. A gun comprising: a. a barrell; b. a chamber that is longer than the cartridge; c. a bolt/carrier unit that is partially or completely nested inside the chamber prior to the cartridge being fired;

2. A barrel comprising: a. a oval cross section that forces the projectile to spin by rotating the major and minor axis;

3. A gun as set forth in claim 1 that utilizes a existing methods of recoil control in addition to the nested bolt:

4. A gun as set forth in claim 1 that fires from a open bolt or partially open bolt:

5. A gun as set forth in claim 1 that utilizes a closed bolt configuration:

6. A gun as set forth in claim 1 that utilizes a damper or a dashpot to control the rate of recoil and return of the nested bolt:

7. A gun as set forth in claim 1 that can operate in a single shot, semi-automatic, or fully automatic configuration:

8. A gun as set forth in claim 1 that incorporates part of the chamber with the bolt carrier unit to increase the mass of the slide:

9. A gun as set forth in claim 1 that uses the friction generated between the cartridge and the chamber during blow back to slow the bolt:

10. A gun as set forth in claim 1 that has deformations on the surface of the chamber to increase the friction between the chamber and the cartridge:

11. A barrel as set forth in claim 2 that utilizes gain twist rifling to distribute the torque over a longer period:

12. A barrel as set forth in claim 2 that utilizes freebore:

13. A barrel as set forth in claim 2 that utilizes a gradual transition between the chamber the oval barrel:

14. A barrel as set forth in claim 2 that utilizes a oval shaped chamber in addition to a oval shaped barrel:

15. A barrel as set forth in claim 2 that utilizes projectiles with an oval cross section to minimize deformation:

16. A barrel as set forth in claim 2 that can fire delicate projectiles:

17. A barrel as set forth in claim 2, that can fire hypersonic projectiles with a twist without damaging the rifling:

18. A barrel as set forth in claim 2 where the cross section is a ellipse:

Description

DRAWINGSFIGURES

[0023] FIG. 1. Illustrates a gun with a nested bolt, a cartridge, and a projectile, in the chamber prior to the gun firing.

[0024] FIG. 2. Illustrates a gun immediately after it is fired. The nested bolt is moving towards the rear, and the projectile is traveling forward. The nested bolt is still in the chamber, trapping the gas in the barrel and the chamber.

[0025] FIG. 3. Illustrates a gun after the nested bolt has exited the chamber, and the cartridge is ejected.

[0026] FIG. 4. Illustrates a barrel that is oval instead of circular. By rotating the major and minor axis of the oval, the projectile will be forced to spin as it travels along the tube. The rate of the projectile spin can be adjusted by the rate at which oval rotates inside of the barrel.

ADVANTAGES

[0027] From the description above, a number of advantages are evident: [0028] a. By utilizing a Nested Bolt in the Chamber, without a locking and/or delay mechanism, the production of the guns will be simpler. [0029] b. By utilizing a Nested Bolt in the Chamber, without a locking and/or delay mechanism, the number of parts will be reduced leading to a more reliable, accurate gun. [0030] c. By utilizing a Nested Bolt in the chamber, with a locking and/or delay mechanism, the locking and/or delay mechanism can be constructed with lower tolerances. This will make them simpler and more reliable. [0031] d. By utilizing a Nested Bolt in the Chamber the recoil force will be distributed over a longer time, decreasing the maximum recoil force. [0032] e. By utilizing a barrel with an oval cross the manufacturing of the barrels will be simplified since less material will need to be removed. [0033] f. By utilizing a barrel with an oval cross section, the projectile will have less area in contact with the barrel and a superior seal. [0034] g. By utilizing a barrel with an oval cross section the distortion to the projectile is minimized creating a smaller force of friction inside the barrel, less distortion of the barrel, and a more aerodynamic projectile. [0035] h. By utilizing a barrel with an oval cross section, a gradual transition between the chamber and the barrel is easily accomplished diminishing fouling. [0036] i. By utilizing a barrel with an oval cross section and a gradual transition, a delicate projectile, such as a paintball can be used. [0037] j. By utilizing a barrel with an oval cross section, the projectile can reach higher velocities without damaging the barrel.

CONCLUSION RAMIFICATION AND SCOPE

[0038] Thus the reader will see that by utilizing a nested bolt in the chamber, it is possible to build a reliable gun with fewer parts that can still utilize high pressure ammunition. There are multiple alternative methods that could be adjusted to meet different scenarios. This design can be used independently of or in addition to other delayed/retarded blowback designs including off axis bolt travel, screw delayed, etc. By utilizing an oval cross section where the major and minor axis rotate the benefits of rifling will be maintained while significantly improving the accuracy, speed, and barrel life of the gun.

[0039] While the above description contains specifications and examples, these should not be construed as limiting the scope of any embodiment, but as an exemplification of the presently preferred embodiments thereof. Many other ramification and variations are possible within the teachings of the various embodiments. Thus the scope of the invention should be determined by the appended claims and their legal equivalents, and not by the examples given.