Reciprocally-cycled weapon

Patent metadata

Field	Value
Publication number	US-9702649-B1
Application number	US-201514658571-A
Country	US
Kind code	B1
Filing date	Mar 16, 2015
Priority date	Jul 18, 2014
Publication date	Jul 11, 2017
Grant date	Jul 11, 2017

Abstract

A reciprocally-cycled weapon delinks and fires cartridges in open-end linked ammunition belts or close-end linked ammunition belts. The weapon has first round select and first cycle fire capabilities. The bolt carrier assembly translates out of phase with the extractor assembly. The extractor assembly is configured for rearward extraction of the cartridges in close-end linked ammunition belts. The weapon works seamlessly with open-end linked and close-end linked ammunition belts.

First claim

What is claimed is:

1. A reciprocally-cycled weapon for delinking and firing cartridges in open-end linked ammunition belts and delinking and firing cartridges in close-end linked ammunition belts, comprising:
a barrel fixed to a receiver;
a bolt carrier assembly mounted in the receiver and translatable along a longitudinal axis, wherein the bolt carrier assembly includes a bolt and upper and lower racks and the upper rack engages a pinion that engages a stationary rack fixed to the receiver, further comprising an external power source that drives the pinion via a crank

and a connecting rod; and,
an extractor assembly mounted in the receiver and translatable along a second axis parallel to the longitudinal axis, the extractor assembly configured for rearward extraction of the cartridges in the close-end linked ammunition belts;
wherein translation of the extractor assembly is out of phase with translation of the bolt carrier assembly, and, wherein the extractor assembly includes an extractor rack that engages a stationary pinion that engages the lower rack of the bolt carrier assembly.

2. The weapon of claim 1 , wherein the translation of the extractor assembly is 180 degrees out of phase with the translation of the bolt carrier assembly.

3. The weapon of claim 1 , wherein the extractor assembly includes an extractor body having a T-slot, a translatable short extractor disposed on one side of the T-slot, a translatable long extractor disposed on another side of the T-slot, a lifting slot formed in the extractor body between the sides of the T-slot, and a power take off cam pin.

4. The weapon of claim 3 , wherein the extractor body includes a spring-loaded anti-backup pawl that extends into the T-slot and a spring-loaded cartridge retainer disposed above the T-slot wherein the spring-loaded anti-backup pawl and the spring-loaded cartridge retainer are configured to limit vertical movement of a cartridge in the T-slot.

5. The weapon of claim 4 , further comprising a rotatable power take off tube disposed in the receiver, the power take off tube including a cam slot that receives the power take off cam pin on the extractor body wherein translation of the extractor assembly causes rotation of the power take off tube.

6. The weapon of claim 5 , further comprising a lifting cam disposed in the receiver and aligned with the lifting slot in the extractor body such that translation of the extractor assembly causes the lifting cam to move a cartridge in the extractor assembly vertically upward in the T-slot.

7. The weapon of claim 6 , further comprising an ammunition magazine juxtaposed with the receiver, the magazine configured to store the close-end linked ammunition belts and feed the close-end linked ammunition belts to the receiver, the magazine including a rotating sprocket that engages the close-end linked ammunition belts and is driven by the power take off tube.

8. The weapon of claim 7 , wherein the magazine includes a magazine feed box disposed above the sprocket, the magazine feed box including a movable follower having an upper and a lower position and cam pins that engage cam slots in the magazine feed box wherein the movable follower is configured to receive a cartridge from the extractor assembly.

9. The weapon of claim 8 , wherein the follower is biased to the lower position by a spring-loaded follower return.

10. The weapon of claim 9 , wherein the follower includes a spring-loaded sub-follower that imparts to a cartridge therein motion that is transverse to the longitudinal axis.

11. The weapon of claim 10 , wherein the magazine feed box includes a follower release sear that holds the follower in the upper position.

12. A reciprocally-cycled weapon for delinking and firing cartridges in open-end linked ammunition belts and delinking and firing cartridges in close-end linked ammunition belts, comprising:
a barrel fixed to a receiver;
a bolt carrier assembly mounted in the receiver and translatable along a longitudinal axis, the bolt carrier assembly including a bolt; and
an extractor assembly mounted in the receiver and translatable along a second axis parallel to the longitudinal axis, the extractor assembly configured for rearward extraction of the cartridges in the close-end linked ammunition belts;
wherein translation of the extractor assembly is 180 degrees out of phase with translation of the bolt carrier assembly which includes a bolt and upper and lower racks and the upper rack engages a pinion that engages a stationary rack fixed to the receiver, and the extractor assembly includes an extractor body having a T-slot, a translatable short extractor disposed on one side of the T-slot, a translatable long extractor disposed on another side of the T-slot, a lifting slot formed in the extractor body between the sides of the T-slot, and a power take off cam pin.

13. The weapon of claim 12 , wherein the extractor body includes a spring-loaded anti-backup pawl that extends into the T-slot and a spring-loaded cartridge retainer disposed above the T-slot wherein the spring-loaded anti-backup pawl and the spring-loaded cartridge retainer are configured to limit vertical movement of a cartridge in the T-slot.

14. The weapon of claim 13 , further comprising a rotatable power take off tube disposed in the receiver and having a cam slot that receives the power take off cam pin on the extractor body wherein translation of the extractor assembly causes rotation of the power take off tube.

15. The weapon of claim 14 , further comprising an ammunition magazine juxtaposed with the receiver, the magazine configured to store the close-end linked ammunition belt and feed the close-end linked ammunition belt to the receiver, the magazine including a rotating sprocket driven by the power take off tube.

Assignees

• Hoffman Brian
• Smith Alexander
• Lukman Hansen
• Us Army

Inventors

• Hoffman Brian
• Smith Alexander
• Lukman Hansen

Classifications

• F41A15/12 Primary

  for bolt-action guns · CPC title

• F41A9/79

  for belted ammunition · CPC title

• F41A3/66

  Breech housings or frames; Receivers · CPC title

• F41A3/14

  Rigid bolt locks, i.e. having locking elements rigidly mounted on the bolt or bolt handle and on the barrel or breech-housing respectively · CPC title

• F41A7/08

  Drives for externally-powered guns, i.e. drives for moving the breech-block or bolt by an external force during automatic firing · CPC title