Quick disconnect mount for muzzle attachments

Patent metadata

Field	Value
Publication number	US-10801796-B2
Application number	US-201916412734-A
Country	US
Kind code	B2
Filing date	May 15, 2019
Priority date	May 16, 2018
Publication date	Oct 13, 2020
Grant date	Oct 13, 2020

Abstract

A mounting assembly for a firearm muzzle attachment includes an attachment mount with a clutch assembly. A muzzle attachment can be secured to the distal end portion of the attachment mount. The attachment mount is configured to removably attach the muzzle attachment to a muzzle adapter installed on the end of a barrel. A clutch assembly on the attachment mount is operable between a locked position and an unlocked position. In the locked position, the clutch assembly frictionally engages the muzzle adapter to inhibit loosening rotation of the muzzle attachment relative to the muzzle adapter. In the unlocked position, the clutch assembly disengages from the muzzle adapter to permit loosening rotation of the attachment mount relative to the muzzle adapter. A method of use and a locking nut are also disclosed.

First claim

What is claimed is:

1. A mounting assembly for firearm muzzle devices, the mounting assembly comprising:
a muzzle adapter with an adapter body configured to be attached to a firearm barrel, the adapter body having a cylindrical sleeve portion;
an attachment mount having a mount proximal end portion and a mount distal end portion, the attachment mount configured to releasably attach to the adapter body when the muzzle adapter is received in the mount proximal end portion, and configured to be secured to a firearm muzzle device received in the mount distal end portion; and
a clutch assembly on the attachment mount, the clutch assembly operable between a locked position and an unlocked position, wherein in the locked position, the clutch assembly engages the muzzle adapter and the attachment mount to inhibit loosening rotation of the attachment mount relative to the muzzle adapter, and wherein in the unlocked position, the clutch assembly disengages from the muzzle adapter to permit loosening rotation of the attachment mount relative to the muzzle adapter.

2. The mounting assembly of claim 1 , wherein the clutch assembly comprises:
a clutch collar rotatable about the attachment mount between the locked position and the unlocked position; and
a locking structure configured to selectively engage or disengage the cylindrical sleeve portion of the muzzle adapter based on the clutch collar being in the locked position or the unlocked position, respectively.

3. The mounting assembly of claim 2 , wherein, when the clutch collar is in the locked position, the locking structure engages the cylindrical sleeve portion of the muzzle adapter, thereby inhibiting loosening rotation of the attachment mount, and when the clutch collar is in the unlocked position, the locking structure disengages from the cylindrical sleeve portion of the muzzle adapter, thereby permitting loosening rotation of the attachment mount.

4. The mounting assembly of claim 3 , wherein the locking structure comprises:
a cam with an arcuate cam surface, the cam being pivotable about a cam axis due to rotation of the clutch collar; and
a cam spring on the attachment mount and engaging the cam;
wherein rotating the clutch collar toward the locked position allows the cam spring to pivot the cam about the cam axis so that the arcuate cam surface engages the sleeve portion of the muzzle adapter, and wherein rotating the clutch collar toward the unlocked position pivots the cam so that the arcuate cam surface disengages from the sleeve portion of the muzzle adapter.

5. The mounting assembly of claim 2 further comprising a locking nut attached to the mount proximal end portion of the attachment mount, the locking nut constructed to retain the clutch collar assembled on the attachment mount.

6. The mounting assembly of claim 5 , wherein the locking nut threadably engages a thread on the mount proximal end portion.

7. The mounting assembly of claim 5 , wherein the locking nut comprises:
an annular body with a distal body portion, a proximal body portion, a radially outer portion, and a radially inward surface defining a female thread, the annular body defining a fastener opening axially therethrough;
a resilient tab defined in the distal body portion and axially aligned with the fastener opening, the resilient tab having a first tab end portion connected to the radially outer portion of the annular body and extending unattached radially inward to a second tab end axially aligned with the radially inward surface, wherein a portion of the female thread extends along the second tab end; and
a fastener configured to be advanced through the fastener opening;
wherein advancing the fastener through the fastener opening causes the fastener to engage the resilient tab and axially deflect the resilient tab, thereby misaligning the portion of the female thread on the distal tab end with the female thread along the radially inward surface of the annular body.

8. The mounting assembly of claim 1 , wherein the clutch assembly, when in the locked position, is a one-way clutch assembly comprising:
a clutch collar rotatable about the attachment mount and operable to move a lock between a first position corresponding to the locked position, and a second position corresponding to the unlocked position, wherein the lock comprises (i) one or more cams, or (ii) one or more rollers.

9. The mounting assembly of claim 1 , wherein the clutch assembly comprises:
one or more cams, each of the one or more cams mounted in a cam opening in the mount body and positioned to engage the cylindrical sleeve portion of the adapter body when the clutch assembly is in the locked position and to disengage from the cylindrical sleeve portion when the clutch assembly is in the unlocked position;
a cam spring biasing each of the one or more cams toward the locked position; and
a clutch collar overlapping and rotatable about the attachment mount in a first direction to move the clutch assembly to the locked position, and rotatable about the attachment mount in a second direction to move the clutch assembly to the unlocked position.

10. The mounting assembly of claim 9 , wherein the cam spring extends along a circumference of the attachment mount and in contact with each of the one or more cams.

11. The mounting assembly of claim 9 , wherein the cam spring is a torsion spring with a first leg engaging the mount body and a second leg engaging one of the one or more cams.

12. The mounting assembly of claim 9 , wherein moving the clutch assembly to the unlocked position further tensions the cam spring.

13. The mounting assembly of claim 9 , wherein each of the one or more cams is positioned to engage a cylindrical outer surface of the adapter body when the clutch assembly is in the locked position, and each of the one or more cams is positioned to be disengaged from the adapter body when the clutch assembly is in the unlocked position.

14. The mounting assembly of claim 13 , wherein each of the one or more cams comprises:
a cam body with a pin opening therethrough, the pin opening defining a pivot axis for the cam;
an arcuate cam surface on the cam body that is eccentric about the pin opening; and
a lever arm extending radially outward from the cam body in a first direction;
wherein the cam spring applies the spring force to the cam.

15. The mounting assembly of claim 14 , wherein each of the one or more cams further comprises a second arm extending radially outward from the cam body in a second direction, the second direction rotated about the pin opening from 0 to 90 degrees with respect to a first direction of the lever arm.

16. The mounting assembly of claim 14 , wherein an inside of the clutch collar engages the lever arm to pivot the cam when moving the clutch assembly to the unlocked position.

17. The mounting assembly of claim 14 , wherein an end of the lever arm abuts the inside of the clutch collar when the clutch assembly is in the unlocked position, thereby preventing the cam from pivoting to the locked position.

18. The mounting assembly of claim 9 , wherein the cylindrical sleeve portion of the adapter body defines a region of reduced diameter, wherein each of the one or more cams engages the region of reduced diameter when the mounting assembly is in the locked position.

19. The mounting assembly of claim 1 , wherein the clutch assembly comprises:
an adapter ring disposed in the mount proximal end portion, the adapter ring having an inside surface constructed to receive the muzzle adapter therein and hav

Assignees

• Sig Sauer Inc

Inventors

• Kras Krzysztof J

Classifications

• F41A21/36

  for recoil reduction (recoil reduction arrangements in general F41A25/00){; Stabilisators; Compensators, e.g. for muzzle climb prevention} · CPC title

• F41A21/325 Primary

  Mountings for muzzle attachments · CPC title

• F41A21/30

  Silencers · CPC title

• F41A21/34

  Flash dampers · CPC title