Connection for the upper receiver part and the lower receiver part of a firearm

Patent metadata

Field	Value
Publication number	US-12044499-B2
Application number	US-202118044770-A
Country	US
Kind code	B2
Filing date	Jul 7, 2021
Priority date	Sep 10, 2020
Publication date	Jul 23, 2024
Grant date	Jul 23, 2024

Abstract

Firearms having an upper receiver part and a lower receiver part that are detachably connected to each other by a connecting mechanism so that the two receiver parts are pivotable relative to each other between a closed and an open position. The connecting mechanism includes at least one pivot pin, running normal to the median plane, and a pivot pin hole passing through the upper and/or the lower normal to the median plane, a connector element with at least one hole and a slotted hole and a protrusion formed on the upper or lower, running in the direction of the barrel axis, and a recess which is complementary thereto in shape and function.

First claim

The invention claimed is:

1. A firearm having a weapon median plane, the firearm comprising:
an upper receiver part including a barrel having a barrel axis; and
a lower receiver part detachably connected to the upper receiver part by a connecting mechanism;
wherein the connecting mechanism includes:
at least one pivot pin having a pivot pin axis normal to the weapon median plane, so that the upper receiver part and the lower receiver part are pivotable around the pivot pin axis between an open position and a closed position in which the firearm is in a ready-to-fire state;
a receiver pivot pin hole defined by and passing through the upper receiver part and/or the lower receiver part; wherein the receiver pivot pin hole defines a receiver pivot pin hole axis that is normal to the weapon median plane;
a connector element having at least one hole and at least one slotted hole, where each of the hole and the slotted hole define axes that are normal to the weapon median plane;
a protrusion formed on the upper receiver part or lower receiver part in the direction of the barrel axis, and a corresponding recess defined by the upper receiver part or lower receiver part that is complementary in shape and function to the protrusion;

wherein when the firearm is in the closed position:
the at least one pivot pin protrudes through at least the receiver pivot pin hole in one of the upper receiver part and the lower receiver part and through the hole and the slotted hole of the connector element in the other of the upper receiver part and the lower receiver part;
the slotted hole of the connector element extends in a direction that is at least substantially parallel to the barrel axis;
the at least one pivot pin lies in a first end of the slotted hole of the connector element arranged concentrically to the hole of the connector element; and
the protrusion is pushed into the recess in the direction of the barrel axis.

2. The firearm according to claim 1 , further comprising:
a rear stop surface formed on a rear of the upper receiver part; and
a receiver counter surface formed on the lower receiver part;
wherein the rear stop surface and the receiver counter surface have regions of complementary shape that are configured so that when the firearm is in the closed position the rear stop surface and the receiver counter surface are in contact with each other.

3. The firearm according to claim 1 , wherein a length of the protrusion is 0.5 times to 0.95 times a span of the slotted hole of the connector element.

4. The firearm according to claim 1 , wherein the connector element having the hole and the slotted hole is connected to one of the upper receiver part and the lower receiver part.

5. The firearm according to claim 1 , further comprising an abutment that is connected to one of the upper receiver part and the lower receiver part, wherein the abutment defines an abutment pivot pin hole.

6. The firearm according to claim 5 , wherein the abutment pivot pin hole has a diameter that is the same as a diameter of the receiver pivot pin hole.

7. The firearm according to claim 5 , wherein one of the connector element and the abutment is connected to one of the upper receiver part and the lower receiver part.

8. The firearm according to claim 1 , wherein the pivot pin has a pivot pin head and a pivot pin body, and is configured so the pivot pin head has a larger diameter than the pivot pin body.

9. The firearm according to claim 8 , wherein the pivot pin is configured so that a transition from the pivot pin body to the pivot pin head is conical in shape.

10. The firearm according to claim 8 , wherein the pivot pin body defines a cam that is a groove-like recess in the pivot pin body, the recess having three contiguous sections including a first section extending longitudinally along the pivot pin body in a direction away from the pivot pin head, a second section extending in a circumferential direction around the pivot pin body, and a third section again extending longitudinally along the pivot pin body in the direction away from the pivot pin head.

11. The firearm according to claim 10 , further comprising a plunger biased in the direction of the pivot pin by a spring, the plunger being disposed on the receiver part on which the receiver pivot pin hole is provided, and being configured to protrude into the cam defined by the pivot pin body.

12. The firearm according to claim 10 , wherein the groove-like recess further defines a radially-recessed detent at a free end of the first section and/or at a transition from the first to the second section and/or at a free end of the third section.

13. The firearm according to claim 12 , further comprising a plunger biased in the direction of the pivot pin by a spring, the plunger being disposed on the receiver part on which the receiver pivot pin hole is provided, and being configured to protrude into the radially-recessed detent.

14. The firearm according to claim 12 , the firearm having an abutment that is connected to the one of the upper receiver part and the lower receiver part on which the receiver pivot pin hole is provided; further comprising a plunger that is biased in the direction of the pivot pin by a spring on the abutment, the plunger being configured to protrude into the cam defined by the pivot pin body.

15. The firearm according to claim 1 , further comprising a handguard and a lock, where the lock includes a hook having a notch, an inner diameter of which corresponds to a diameter of the pivot pin body, and the lock is configured so that when the firearm is in the closed position the lock extends from an end of the handguard that is furthest from a muzzle of the firearm in the direction of the barrel axis to the pivot pin and engages the pivot pin by enclosing the pivot pin for at least part of its circumference with the hook and notch, so that the lock thereby determines a position of the handguard in the direction of the barrel axis.

16. The firearm according to claim 15 , wherein the lock is integrally formed with the handguard.

17. The firearm according to claim 1 , wherein the at least one slotted hole of the connector element has a first end and a second end, and the first end of the slotted hole of the connector element is arranged concentrically with the hole of the connector element.

18. The firearm according to claim 1 , wherein the connector element is connected to one of the upper receiver part and the lower receiver part in a fixed manner, in a manner allowing disassembly, or the connector element is integrally formed on the receiver part.

19. The firearm according to claim 1 , wherein the upper part or the lower receiver part is connected with the connector element in a fixed manner, in a manner allowing disassembly, or the connector element is integrally formed on the receiver part.

20. The firearm according to claim 1 , wherein the abutment is connected to the upper receiver part or the lower receiver part in a fixed manner, in a manner allowing disassembly, or the abutment is integrally formed on the receiver part.

Assignees

• Glock Tech Gmbh

Inventors

• Wutte Andreas

Classifications

• F41A3/68

  Bolt stops, i.e. means for limiting bolt opening movement · CPC title

• F41A3/64

  Mounting of breech-blocks; Accessories for breech-blocks or breech-block mountings · CPC title

• F41A3/66 Primary

  Breech housings or frames; Receivers · CPC title