FIREARM BARREL ASSEMBLY

Abstract

The barrel of a pistol, specifically in a short recoil operated pistol, is comprised of multiple bearings surfaces comprised of cams and lugs that allow the pistol to function. The surfaces mechanically delay the pistol enough to allow the pistol to reliably function in the manner of an automatic firearm, chambering a round at the end of each cycle of operation. A barrel that locates a forward lug positioned horizontally in front of the trigger guard of the pistol with side cams that are shallow and interact in a way to provide the pistol with a robust and consistent lock up from shot to shot to provide an advantage in the function of the firearm.

Description

FIELD OF THE INVENTION

The present invention relates to firearms, and in particular to pistol barrels.

BACKGROUND

The barrel of a pistol, specifically in a short recoil operated pistol, is comprised of multiple bearings surfaces comprised of cams and lugs that allow the pistol to function. The surfaces mechanically delay the pistol enough to allow the pistol to reliably function in the manner of an automatic firearm, chambering a round at the end of each cycle of operation.

Pistol barrels, in short recoil operated pistols, have traditionally located their cam and lug surfaces as near to the bore of the pistol as possible. These surfaces are usually comprised of an easily machined single or double lug surface that locks into the frame of the pistol. This action, traditionally, happens above the trigger guard, which increases the bore axis of these traditional designs.

The traditional lock up system constricts the ability to lower the bore axis with a robust barrel design. The present invention provides a barrel that locates a forward lug positioned horizontally in front of the trigger guard of the pistol with side cams that are shallow and interact in a way to provide the pistol with a robust and consistent lock up from shot to shot.

SUMMARY

The barrel of the present invention provides a barrel with a forward lower lug surface operably forward of the bore and forward of the trigger guard that it operates in. It also has two side cams that interact with corresponding lugs in the pistol.

The placement of these cams and lugs, unique in pistol design, allow for the pistol to operate in as rugged and reliable a manner as other designs, while offering the advantages that the pistol design claims.

The present invention further contemplates a firearm barrel assembly having a trigger guard, an insert above the trigger guard, a barrel connected to the insert and defining a center line axis, a slide enclosing the barrel and operable to reciprocate along the center line axis between a forward battery position and a rearward open position, an arrangement of cams, lugs, and a pin, the arrangement connected to the barrel, such that the cams and lugs engage and disengage with each other and the pin as the barrel moves in and out of battery.

BRIEF DESCRIPTION OF THE DRAWINGS

For a more complete understanding of the present disclosure, and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings, in which:

FIG. 1A is a side view of the barrel of the invention.

FIG. 1B is a cross-sectional view of FIG. 1A.

FIG. 1C is a cross-sectional view of FIG. 1C.

FIG. 2 is an exploded view of the barrel assembly of the invention.

FIG. 3 is a cross-sectional view of the barrel in battery.

FIG. 4 is a cross-sectional view of the barrel of FIG. 3 with a cutaway detail.

FIG. 5 is a cross-sectional view of the barrel disengaged from the front lug.

FIG. 6 is a cross-sectional view of the barrel of FIG. 5 with a cutaway detail.

FIG. 7 is a cross-sectional view of the barrel at its most rearward point of travel.

FIG. 8 is a cross-sectional view of the barrel of FIG. 7 with a cutaway detail.

FIG. 9 is a cross-sectional view of the barrel at its most rearward point of travel.

FIG. 10 is a cross-sectional view of the barrel of FIG. 9 with a cutaway detail.

FIG. 11 is a cross-sectional view of the barrel at a point prior to return to battery.

FIG. 12 is a cross-sectional view of the barrel of FIG. 11 with a cutaway detail.

FIG. 13 is a cross-sectional view of the barrel returned to battery.

FIG. 14 is a cross-sectional view of the barrel of FIG. 13 with a cutaway detail.

DETAILED DESCRIPTION

The following discussion is directed to various embodiments of the invention. The term “invention” is not intended to refer to any particular embodiment or otherwise limit the scope of the disclosure. Although one or more of these embodiments may be preferred, the embodiments disclosed should not be interpreted, or otherwise used, as limiting the scope of the disclosure, including the claims. In addition, one skilled in the art will understand that the following description has broad application, and the discussion of any embodiment is meant only to be exemplary of that embodiment, and not intended to intimate that the scope of the disclosure, including the claims, is limited to that embodiment.

In the following discussion and in the claims, the terms “including” and “comprising” are used in an open-ended fashion, and thus should be interpreted to mean “including, but not limited to.” Also, the term “connect” or “connected” or equivalent term where used if at all is intended to mean either an indirect or direct connection. Thus, if a first component connects to a second component, that connection may be through a direct connection or through an indirect connection via other components and connections.

Certain terms are used throughout the following description and claims to refer to particular system components and method steps. As one skilled in the art will appreciate, different companies may refer to a component by different names. This document does not intend to distinguish between components that differ in name but not function.

FIG. 1A is a side view of the barrel enclosed by a slide and operably mounted on a frame insert to provide a barrel assembly 100.

FIG. 1B is a cross-sectional view of FIG. 1A, showing the barrel front lug 112 resting on a pin 118 mounted into a frame insert 116 and operably retained by the slide 108 in assembly 100.

FIG. 1C is a cross-sectional view of FIG. 1C, showing the side cams 106 of the barrel 110 resting above corresponding lugs 104 in a frame insert 116.

FIG. 2 is an exploded view of the barrel 110, a slide 108 forward of breach face 102, a frame insert 116, and a pin 118. Lugs 106 are disposed behind barrel ramp 112 under barrel 110. Cams 104a and 104b (collectively, side cams 104) are mounted on insert 116, or alternatively are integral with insert 116.

FIG. 3 is a cross-sectional view of the barrel 110 in battery, a slide 108 enclosing the barrel 110 and mounted to a frame insert 116 operably by the front lug 112 of the barrel 110 resting on a pin 118. Breach face 102 is forward of hood 120.

FIG. 4 is the cross-sectional view of the barrel in battery of FIG. 3 with a cut away to reveal the cam and lug barrel mechanism. A slide 108 enclosing the barrel 110 and mounted to a frame insert 116 operably by the front lug 112 of the barrel 110 resting on a pin 118. A cutaway displays the side cams 106 of the barrel 110 in battery, not interacting with the corresponding lugs 104 on the insert 116.

FIG. 5 is a cross-sectional view of the barrel disengaged from the front lug 112, a slide 108 enclosing the barrel 110 and moving rearward 122 causing the barrel 110 to disengage from a pin 118.

FIG. 6 is a cross-sectional view of the barrel out of battery, a slide 108 enclosing the barrel 110 and mounted to a frame insert 116 operably by the front lug 112 of the barrel 110 resting on a pin 118. A cutaway displays the side cams 106 of the barrel 110 in a rearward position, interacting with the corresponding lugs 104 on the insert 116.

FIG. 7 is a cross-sectional view of the barrel at its most rearward point of travel, a slide 108 enclosing the barrel 110 and moving further rearward than FIG. 5 causing the barrel hood 120 to drop below the surface of a slide 108.

FIG. 8 is a cross-sectional view of the barrel at its most rearward point of travel. A slide 108 enclosing the barrel 110 and mounted to a frame insert 116 operably by the front lug 112 of the barrel 110 resting on a pin 118. A cutaway displays the side cams 106 of the barrel 110 in the rearmost position, interacting with the corresponding lugs 104 on the insert 116.

FIG. 9 is a cross-sectional view of the barrel at its most rearward point of travel. a slide 108 enclosing the barrel 110 and moving further rearward than FIG. 7 causing the barrel hood 120 to drop below the surface of a slide 108.

FIG. 10 is a cross-sectional view of the barrel at its most rearward point of travel. A slide 108 enclosing the barrel 110 and mounted to a frame insert 116 operably by the front lug 112 of the barrel resting on a pin 118, a cutaway displays the side cams 106 of the barrel 110 in the rearmost position shown in FIG. 9, interacting with the corresponding lugs 104 on the insert 116.

FIG. 11 is a cross-sectional view of the barrel at a point prior to return to battery. Movement 124 is forward. A slide 108 enclosing the barrel 110 with the hood 120 not returning above the plane of the slide 108, the front lug 112 engaging a pin 118.

FIG. 12 is a cross-sectional view of the barrel at a point prior to return to battery. A slide 108 enclosing the barrel 110 and returning the front lug 112 to rest on a pin 118 that mounts a frame insert 116, a cutaway displays the side cams 106 of the barrel 110 unlocking from the insert lugs 104.

FIG. 13 is a cross-sectional view of the barrel returned to battery. A slide 108 enclosing the barrel 110, the front lug 112 engaging a pin 118 operably connected to a frame insert 116.

FIG. 14 is a cross-sectional view of the barrel returned to battery. A slide 110 enclosing the barrel 110 and a front lug 112 resting on a pin 118 that mounts in a frame insert 116, a cutaway displays the side cams 106 of the barrel 110 resting in battery, disengaged from insert lugs 104.

Many modifications and other embodiments of the invention described herein will come to mind to one skilled in the art to which this disclosure pertains having the benefit of the teachings presented in the foregoing descriptions and the associated drawings. Therefore, it is to be understood that the disclosure is not to be limited to the specific embodiments disclosed and that modifications and other embodiments are intended to be included within the scope of the appended claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. A firearm having a barrel assembly, the barrel assembly comprising: a forward tubular portion having a lower wall surface portion and defining a bore axis;an insert housing a cam pin proximate the barrel;a rear portion of the barrel defining a cam channel receiving a cam pin;a cam channel having a guide surface angled downwardly to the rear with respect to the bore axis, such that rearward movement of the barrel in recoil drives the rear portion of the barrel in a downward direction as the cam channel guide surface slides over the cam pin; andthe cam channel having an upper portion above the level of the lower wall surface portion of the forward tubular portion of the barrel.

2. The firearm of claim 1, wherein the cam channel is defined in a side portion of the rear portion of the barrel, and has a vertical floor surface spaced apart from a medial plane of the barrel, such that the barrel wall thickness is maintained above a preselected dimension proximate to the cam channel.

3. The firearm of claim 1, where each of a pair opposed lateral sides of the barrel defines a cam channel.

4. The firearm of claim 1, further comprising a slide and a frame defined by a pair of opposed upper sidewalls, each of the opposed upper sidewalls having an upper edge abutting the slide, and wherein at least a portion of the cam pin is above the level of the upper edges of the opposed upper sidewalls.

5. The firearm of claim 1, including a pair of cam pins, each spaced apart from each other to receive a portion of the barrel therebetween.

6. A firearm comprising: an insert;a cam pin housed proximate the barrel in the insert;a barrel connected to the insert and defining a bore axis, the barrel having a forward tubular portion having a lower wall surface portion;a slide enclosing the barrel and operable to reciprocate along the bore axis between a forward battery position and a rearward open position; anda cam channel defined by a rear portion of the barrel and having an upper portion above the level of the lowest portion of the forward tubular portion of the barrel, the cam channel receiving the cam pin, the cam channel further having a guide surface angled downwardly to the rear with respect to the bore axis, such that rearward movement of the barrel in recoil drives the rear portion of the barrel in a downward direction as the cam channel guide surface slides over the cam pin.

7. The firearm of claim 6, wherein the cam channel is defined in a side portion of the rear portion of the barrel, and has a vertical floor surface spaced apart from a medial plane of the barrel, such that the barrel wall thickness is maintained above a preselected dimension proximate to the cam channel.

8. The firearm of claim 6, where each of a pair opposed lateral sides of the barrel defines a cam channel.

9. The firearm of claim 6, wherein the frame defines a pair of opposed upper sidewalls, each having an upper edge abutting the slide, and wherein at least a portion of the cam pin is above the level of the upper edges of the frame upper sidewalls.

10. The firearm of claim 6, including a pair of cam pins, each spaced apart from each other to receive a portion of the barrel therebetween.

10. A firearm comprising: a trigger guard;an insert above the trigger guard;a barrel connected to the insert and defining a center line axis;a slide enclosing the barrel and operable to reciprocate along the center line axis between a forward battery position and a rearward open position;an arrangement of cams, lugs, and a pin, the arrangement connected to the barrel, wherein the cams and lugs engage and disengage with each other and the pin as the barrel moves in and out of battery.

11. The firearm of claim 10, wherein one or more of the cams of the arrangement of cams, lugs and a pin, are connected to the insert.