US12631418 - Takedown firearm

The patent describes a takedown firearm that features removable barrels of varying calibers, designed for precise and repeatable positioning without requiring barrel extensions. It incorporates a unique tensioning assembly that passively secures the barrel during installation, minimizing harmonics effects and enhancing manufacturing tolerance.

Claim 1

1 . A takedown firearm, comprising: a receiver, including: a front receiver ring that includes a distal face and defines an inside diameter; a locking stud that extends radially inward relative to said inside diameter; and a detent plunger that extends radially inward relative to said inside diameter, said detent plunger and said locking stud being centered about a common plane, a removable barrel defining a barrel axis and defining an outer dimension at a proximal end portion, said proximal end portion including a shank portion, wherein said shank portion: includes a proximal face and an outer surface that defines a shank diameter dimensioned for a close sliding fit with said inside diameter of said front receiver ring, said shank diameter being less than said outer dimension of said proximal end portion of said removable barrel to define a shoulder at a junction of said outer dimension and said shank portion; includes a locking stud track configured to guide said locking stud axially and rotationally during assembly; includes a plunger track configured to guide said detent plunger axially and rotationally during assembly; and defines a detent notch at a rotational extremity of said plunger track, and a tensioner assembly including a biasing element and a collar, said collar having a proximal face that defines and is concentric about a tensioner axis, said tensioner assembly defining a proximal opening and a distal opening, said proximal opening being greater than said shank diameter, said distal opening being configured to receive said outer dimension of said proximal end portion, said biasing element being disposed between said collar and said shoulder, wherein said shank portion is insertable into said front receiver ring so that said locking stud track guides said locking stud and said plunger track guides said detent plunger to an interlocked configuration, and wherein, in said interlocked configuration, said detent plunger is registered within said detent notch and said distal face of said front receiver ring registers against said proximal face of said collar to compress said biasing element. a receiver, including: a front receiver ring that includes a distal face and defines an inside diameter; a locking stud that extends radially inward relative to said inside diameter; and a detent plunger that extends radially inward relative to said inside diameter, said detent plunger and said locking stud being centered about a common plane, a front receiver ring that includes a distal face and defines an inside diameter; a locking stud that extends radially inward relative to said inside diameter; and a detent plunger that extends radially inward relative to said inside diameter, said detent plunger and said locking stud being centered about a common plane, a removable barrel defining a barrel axis and defining an outer dimension at a proximal end portion, said proximal end portion including a shank portion, wherein said shank portion: includes a proximal face and an outer surface that defines a shank diameter dimensioned for a close sliding fit with said inside diameter of said front receiver ring, said shank diameter being less than said outer dimension of said proximal end portion of said removable barrel to define a shoulder at a junction of said outer dimension and said shank portion; includes a locking stud track configured to guide said locking stud axially and rotationally during assembly; includes a plunger track configured to guide said detent plunger axially and rotationally during assembly; and defines a detent notch at a rotational extremity of said plunger track, and includes a proximal face and an outer surface that defines a shank diameter dimensioned for a close sliding fit with said inside diameter of said front receiver ring, said shank diameter being less than said outer dimension of said proximal end portion of said removable barrel to define a shoulder at a junction of said outer dimension and said shank portion; includes a locking stud track configured to guide said locking stud axially and rotationally during assembly; includes a plunger track configured to guide said detent plunger axially and rotationally during assembly; and defines a detent notch at a rotational extremity of said plunger track, and a tensioner assembly including a biasing element and a collar, said collar having a proximal face that defines and is concentric about a tensioner axis, said tensioner assembly defining a proximal opening and a distal opening, said proximal opening being greater than said shank diameter, said distal opening being configured to receive said outer dimension of said proximal end portion, said biasing element being disposed between said collar and said shoulder, wherein said shank portion is insertable into said front receiver ring so that said locking stud track guides said locking stud and said plunger track guides said detent plunger to an interlocked configuration, and wherein, in said interlocked configuration, said detent plunger is registered within said detent notch and said distal face of said front receiver ring registers against said proximal face of said collar to compress said biasing element.

Google Patents

https://patents.google.com/patent/US12631418

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12631418