AR-15, M4, M16 and similar prior art MILSPEC rifles cannot be quickly disassembled and reassembled where the rifle barrel connects to the upper receiver, a process which usually requires the use of specialized tools and a work-bench equipped with a vise. While there are some prior art systems that allow for in-field tool-less disassembly and reassembly of the barrel from the upper receiver, these systems are not effective or robust, are complicated to use, and do not allow for use of standard MILSPEC had guards and other accessories commoly used with these types of firearms.
This patent is for quick-take down firearms and methods of using quick-take down firearms.
In one non-limiting example, the quick-take down includes an upper receiver coupling configured to be secured to an upper receiver threading of the firearm, the upper receiver coupling including several rotationally offset gas tube tunnels extending through the upper receiver coupling; further includes a rifle barrel coupling configured to be secured to a barrel of the firearm; and further includes a sliding lock collar configured to be slid in a translational motion between a locked position and an unlocked position, the sliding lock collar biased to the locked position; when the sliding lock collar is in the unlocked position the barrel of the firearm can be removed from and installed on the upper receiver; when the sliding lock collar is in the locked position and the barrel is installed on the upper receiver the upper receiver coupling is secured to the rifle barrel coupling thereby securing the barrel to the upper receiver.
In one non-limiting example, a method of assembly for a quick take-down firearm includes: sliding a sliding lock collar in a translational motion to an unlocked position to release a plurality of locking elements from a locked configuration, in which the sliding lock collar is biased away from the unlocked position towards a locked position; next, while the sliding lock collar is held at the unlocked position, inserting a barrel of the firearm into an upper receiver of the firearm, in which an upper receiver coupling is secured to threading of the upper receiver, the upper receiver coupling comprising a gas tube tunnel extending through a body of the upper receiver coupling and a barrel coupling is secured to the barrel; next inserting the barrel into the upper receiver further comprises inserting a barrel pin of the barrel into a notch of the upper receiver threading, and inserting a gas tube of the barrel through the gas tube tunnel of the upper receiver coupling; and next, after inserting the barrel into the upper receiver, releasing the sliding lock collar such that it slides in the translational motion to the locked position to secure the upper receiver coupling to the barrel coupling.
The firearm of
In the prior art, the barrel 12 was attached to the upper receiver 10 by inserting the end of the barrel 12 into the upper receiver's opening 16 until the barrel reference surface 28 contacted the reference surface of the upper receiver 22 and the pin 30 was fully seated in the notch 20. Next, a barrel nut (not shown) would be threaded onto the threads 18 of the upper receiver 10 to secure the barrel 12 in the opening 16. A handguard (e.g. such as handguard 14 shown in
Quick Take-Down Coupling Example
The body 36 of
The body 36 of
The body 36 of
The opening of collar 42 includes a recessed area terminating at shoulder 60 at one end of the collar 42. The recess is configured to contain the resilient element 40 shown in
The opening of collar 42 also includes a second recess at the other end of the collar 42. In this particular example, second recess is formed by ramped surface 62. When the collar 42 is biased away from the shoulder 56 of body 36, the ramped surface 62 acts on locking elements 38 to cause those elements to protrude into the opening 46 of body 36 (see
The barrel coupling 34 further includes several locking element receivers 76 spaced apart from one another and configured and located to receive portions of locking elements 38 during use. In the particular example shown, the locking elements receivers 76 are depressions in the outer surface of the barrel coupling 34. In the particular example shown, the spaced apart locking elements 38 and locking element receivers 76 help to resist rotation of the movement or forces of the upper receiver coupling 32 relative to the barrel coupling 34 when the components are locked together.
The barrel coupling 34 further includes threads 78 on a portion of its outer surface. Threads 78 are not shown in
Example Method of Installation
The following is one example of a method of installing the quick-take down coupling shown in
The upper receiver coupling 32 may be installed onto the upper receiver 10 by threading the upper receiver coupling 32 onto the upper receiver threads 18 to a desired torque and such that one of the tunnels 54 of the upper receiver coupling 32 is adequately aligned with the opening 24 in upper receiver 10. Set screws or other fasteners may be inserted into openings 50 in body 36 to further secure the upper receiver coupling 32 to the upper receiver threads 18.
The barrel coupling 34 may be installed onto the barrel 12 by sliding the coupling 34 onto the barrel until the barrel ridge is partially or entirely received in recessed area 72, with the reference surface 28 of the barrel ridge coplanar or just proud of the end of barrel coupling 34 and barrel pin 30 adjacent or proximate the barrel coupling 34. Set screws or other fasteners may be inserted into openings 74 in coupling 34 to further secure it to the barrel 12.
A handguard and/or barrel nut (e.g. 80 in
Example Method of Use
The following is one example of a method of using the quick-take down coupling shown in
Protective cap 82 may be removed from the end of gas tube 26 and barrel 12.
Sliding lock collar 42 may be slid using a translational motion (e.g. non-rotational) back towards the upper receiver 10 to an unlocked position that releases the locking elements 38 inside of the upper receiver coupling 32.
While the sliding lock collar 42 is held at the unlocked position, the barrel 12 may be inserted into the upper receiver 10. The barrel 12 is inserted until the barrel reference surface 28 contacts the upper receiver contact surface 22, with the barrel pin 30 seated in notch 20. During insertion of the barrel, gas tube 26 (or a piston) is also inserted through one of the tunnels 54 in the upper receiver coupling 32 and into opening 24 in the upper receiver 10. Once inserted, the locking element receivers 76 of the barrel coupling 34 are aligned with the locking elements 38 of the upper receiver coupling 32.
Once inserted, the sliding lock collar 42 is released such that resilient element 40 forces the sliding lock collar 42 back to a locked position, causing the locking elements 38 to engage the locking element receivers 76, securing the barrel 12 to the upper receiver 10.
The barrel 12 may be removed from the upper receiver 10 using the same procedure in reverse.
The foregoing description is by way of example only, and does not limit in any way the scope of the present invention, which is set forth in the following claims. Additions, deletions, substitutions, and other modifications to the systems and methods described above may be made without departing from the scope or spirit of the present invention.
This patent claims the benefit of and incorporates in its entirety U.S. provisional patent application No. 62/314,758, filed Mar. 29, 2016 for a “Straight-in, rifle barrel attachment & detachment using a ball bearing positive lock.”
Number | Name | Date | Kind |
---|---|---|---|
2625766 | Simpson | Jan 1953 | A |
3181262 | Bridge, Sr. | May 1965 | A |
3667343 | Jurkowski | Jun 1972 | A |
4546564 | A'Costa | Oct 1985 | A |
4920679 | Sarles | May 1990 | A |
5433133 | La France | Jul 1995 | A |
5509345 | Cyktich | Apr 1996 | A |
5559302 | Latka | Sep 1996 | A |
5685102 | Latka | Nov 1997 | A |
5987797 | Dustin | Nov 1999 | A |
6273080 | Sullivan, Jr. | Aug 2001 | B1 |
6655372 | Field et al. | Dec 2003 | B1 |
6959509 | Vais | Nov 2005 | B2 |
7076904 | Rustick | Jul 2006 | B1 |
7353740 | Hoffman | Apr 2008 | B1 |
7574823 | Nakayama | Aug 2009 | B2 |
7610710 | Brittingham | Nov 2009 | B2 |
7676976 | Dueck et al. | Mar 2010 | B2 |
7721639 | Wössner | May 2010 | B2 |
7946059 | Borel | May 2011 | B2 |
8291805 | Quilligan | Oct 2012 | B1 |
8479429 | Barrett et al. | Jul 2013 | B2 |
8490312 | Barrett et al. | Jul 2013 | B2 |
8505227 | Barrett et al. | Aug 2013 | B2 |
8607490 | Zinsner | Dec 2013 | B1 |
8689478 | Patel | Apr 2014 | B2 |
8769853 | LaRue | Jul 2014 | B1 |
8782943 | Jarboe | Jul 2014 | B2 |
8839545 | Gangl et al. | Sep 2014 | B1 |
8863426 | Zinsner | Oct 2014 | B1 |
8910746 | McKenzie | Dec 2014 | B1 |
8997621 | Dater et al. | Apr 2015 | B1 |
9057576 | Barrett et al. | Jun 2015 | B2 |
9121656 | McKenzie | Sep 2015 | B1 |
9175919 | Russell et al. | Nov 2015 | B2 |
9228786 | Sulllivan et al. | Jan 2016 | B2 |
9234717 | Jarboe | Jan 2016 | B2 |
9383156 | Steimke et al. | Jul 2016 | B2 |
9448027 | Zinsner | Sep 2016 | B1 |
20060277810 | Leitner-Wise | Dec 2006 | A1 |
20070095198 | Dater | May 2007 | A1 |
20150198403 | Bentley | Jul 2015 | A1 |
20150308779 | McGinty | Oct 2015 | A1 |
20160033225 | Selvetti | Feb 2016 | A1 |
20160054096 | Dzwill | Feb 2016 | A1 |
20160102935 | Young | Apr 2016 | A1 |
20160116251 | Mather et al. | Apr 2016 | A1 |
20160209155 | Dodson | Jul 2016 | A1 |
20170160037 | Gray | Jun 2017 | A1 |
Entry |
---|
New DOLOS System from Huntertown Arms, The Firearm Blog, http://www.thefirearmblog com/blog/2016/03/31/new-dolos-system-from-huntertown-arms, Posted Mar. 31, 2016, (Admitted Prior Art), 7 pages. |
Number | Date | Country | |
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20170284760 A1 | Oct 2017 | US |
Number | Date | Country | |
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62314758 | Mar 2016 | US |