Firearm accessory mounting interface

Patent metadata

Field	Value
Publication number	US-11536535-B2
Application number	US-202117225237-A
Country	US
Kind code	B2
Filing date	Apr 8, 2021
Priority date	Apr 3, 2014
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

Abstract

An accessory mounting interface for a firearm, and a related method, are disclosed. The interface has a firearm accessory, a first elongated fastener, and a second fastener rotationally mated to the first elongated fastener. The first elongated fastener has right-handed threading and is arranged through a through hole in the firearm accessory with a first end extending below first and second halves of a first slot protrusion of the firearm accessory. The second fastener has a length greater than a width, the length measured along a longitudinal axis of the second fastener, the second fastener having a plurality of straight edges. At least one of the plurality of straight edges prevents the second fastener from rotating further than a closed position when the at least one of the straight edges abuts a sidewall of an elongated slot in the firearm.

First claim

What is claimed is:

1. An accessory mounting interface for a firearm comprising:
an elongated slot shaped and sized to extend through a wall of the firearm;
a first fastener configured to pass through a firearm accessory; and
a second fastener having an upper locking portion and a lug, wherein the upper locking portion has two opposing edges in a plane that, when flush with at least a portion of the elongated slot, prevent the second fastener from rotating beyond a closed position, the second fastener configured to mate to the first fastener,
wherein the lug is configured to:
pass through at least a portion of the elongated slot when oriented to have a longitudinal axis parallel to a longitudinal axis of the elongated slot,
prevent removal of the second fastener from the elongated slot when oriented obliquely to the longitudinal axis of the elongated slot, and
draw the first and second fasteners together about one or more of the wall of the firearm and the firearm accessory when one or more of the first and the second fastener is tightened.

2. The accessory mounting interface of claim 1 , wherein the first fastener includes a flanged end rotatably arranged beneath the second fastener, and wherein each of the flanged end and a bottom of the second fastener comprise one or more notches that can engage to prevent relative rotation between the flanged end and the second fastener.

3. The accessory mounting interface of claim 1 , wherein one or more first slot protrusions extend from a surface of the firearm accessory and are configured to extend into the elongated slot, and wherein the one or more first slot protrusions are configured to abut sidewalls of the elongated slot.

4. The accessory mounting interface of claim 3 , wherein at least one of the one or more first slot protrusions comprise one or more inner arcs partially surrounding a through hole through the firearm accessory, and wherein a closed position of the second fastener is rotated 45° to 135° from an open position.

5. The accessory mounting interface of claim 4 , wherein at least one of the one or more first slot protrusions is shaped and sized to match or create a substantially flush fit with curved or arced edges of the upper locking portion of the second fastener.

6. The accessory mounting interface of claim 3 , further comprising: a second slot protrusion configured to surround at least a portion of the first and second fasteners when the first and second fasteners are at least partially passed through the elongated slot, wherein the second slot protrusion comprises an inner diameter shaped and sized to enable the upper locking portion of the second fastener to pass through and rotate without impinging on the second slot protrusion.

7. The accessory mounting interface of claim 3 , wherein the one or more first slot protrusions are configured to have a width less than or equal to a width of the elongated slot, and wherein, when the one or more first slot protrusions are at least partially inserted through the elongated slot, the firearm accessory is prevented from one or more of rotating and lateral movement, the lateral movement being in a direction of a longitudinal axis of the elongated slot and perpendicular to the longitudinal axis of the elongated slot.

8. The accessory mounting interface of claim 1 , wherein the first fastener is configured to clear a depth of the wall of the firearm, and wherein the first and the second fastener are threaded and configured to mate via rotation.

9. The accessory mounting interface of claim 8 , wherein the lug comprises one or more flanges, and wherein at least one of:
a top surface of at least of the one or more flanges includes protrusions extending up from one or more corners of the top surface;
a bottom outer edge of the one or more flanges includes chamfers; and
the top surfaces of the one or more flanges include notches.

10. The accessory mounting interface of claim 1 , wherein the lug has one of: at least four straight faces; two straight faces and two curved ends; or two straight faces and two ends, each of the two ends having at least one straight end and one curved end.

11. A firearm accessory mounting interface comprising:
a first fastener having a proximal end and a distal end, the first fastener configured to pass through a firearm accessory and a slot in a firearm; and
a second fastener having a lug and a locking portion, the second fastener configured to mate to the first fastener so as to draw the first and second fasteners together along a first axis and about one or more of the firearm accessory and the firearm, the lug and the locking portion shaped to fit through the slot in the firearm when the second fastener is parallel to a second axis passing through the slot, wherein when the second fastener is oblique to the second axis, the lug cannot pass through the slot;
the locking portion, in a closed position, is configured to prevent the second fastener from rotating beyond the closed position.

12. The firearm accessory mounting interface of claim 11 , wherein one or more first slot protrusions extend from a surface of the firearm accessory and are configured to extend into the slot, and wherein the one or more first slot protrusions are configured to abut sidewalls of the slot.

13. The firearm accessory mounting interface of claim 12 , wherein at least one of the one or more first slot protrusions has first and second halves with inner arcs partially surrounding a through hole through the firearm accessory, and wherein a closed position of the second fastener is rotated 45° to 135° from an open position.

14. The firearm accessory mounting interface of claim 12 , further comprising: a second slot protrusion configured to surround at least a portion of the first and second fasteners when the first and second fasteners are at least partially passed through the slot, wherein the second slot protrusion comprises an inner diameter shaped and sized to enable the upper locking portion of the second fastener to pass through and rotate without impinging on the second slot protrusion.

15. The firearm accessory mounting interface of claim 12 , wherein the one or more first slot protrusions are configured to have a width less than or equal to a width of the slot, and wherein, when the one or more first slot protrusions are at least partially inserted through the slot, the firearm accessory is prevented from rotating and lateral movement, the lateral movement being in a direction of a longitudinal axis of the slot and perpendicular to the longitudinal axis of the slot.

16. The firearm accessory mounting interface of claim 11 , wherein the first fastener includes a flanged end rotatably arranged beneath the second fastener, and wherein each of the flanged end and a bottom of the second fastener comprise one or more notches that can engage to prevent relative rotation between the flanged end and the second fastener.

17. The firearm accessory mounting interface of claim 11 , the lug comprises one or more flanges, and wherein at least one of:
a top surface of at least of the one or more flanges includes protrusions extending up from one or more corners of the top surface;
a bottom outer edge of the one or more flanges include chamfers;
and the top surfaces of the one or more flanges include notches.

18. The firearm accessory mounting interface of claim 11 , wherein the lug has one of: at least four straight faces; two straight faces and two curved ends; or two straight faces and two ends, each of the two ends having at least one straight end and o

Assignees

• Magpul Ind Corp

Inventors

• Mayberry Michael T
• Bennett William Bradley
• Roberts Timothy Eric
• Liptak Duane
• Nakayama Brian L

Classifications

• F41G11/003

  Mountings with a dove tail element, e.g. "Picatinny rail systems" · CPC title

• F41C23/16 Primary

  Forestocks; Handgrips; Hand guards (pump-action guns F41C7/02) · CPC title

• F41C23/02

  Attachment of slings · CPC title

• F41G11/004

  Mountings with clamping means on the device embracing at least a part of the firearm, e.g. the receiver or a dustcover (F41G11/003 takes precedence) · CPC title

• F41A23/08

  Bipods · CPC title