Aug 12, 2025

US12385717 - Twist-action pen gun

A complete concealed, handheld, single shot pen gun having the full appearance of a well-designed twist action pen equipped with full writing function is presented. The invention provides seamless design without surface interruptions. A drop safety function locks the firing pin in a safe position. The drop safety cannot be deactivated by accident. After activation of the drop safety, the loaded pen gun is suitable for daily use as a regular twist action pen. The exchangeable pen refill can be extended and retracted; accidental triggering of the cartridge is not possible.

Inventors: Christoph Kowar
Filing date: 2023-06-30

pengunfirearm

The patent describes a twist-action pen gun that resembles a regular pen while incorporating a single-shot firearm mechanism, featuring a drop safety to prevent accidental discharge. It includes a firing pin assembly with safety notches and a control bolt that allows the user to switch between cocked and uncocked positions seamlessly.

Claim 1

A pen gun, comprising: a pen-shaped body with a barrel portion comprising a barrel for loading a cartridge; a receiver portion providing a receiver, said receiver housing a firing pin assembly; and a handle portion comprising a switch handle; wherein the firing pin assembly comprises a firing pin housing and a firing pin slidably received with its rear end therein, a control bolt slidably received in the firing pin housing being translationally connected to the firing pin and rotatably connected to the switch handle, and a firing pin lock received in the firing pin housing; wherein the firing pin comprises a first notch for engaging with the firing pin lock, providing a first safety for the firing pin in an uncocked position, and a second notch for engaging with the firing pin lock, providing a second safety for the firing pin in a cocked position; and wherein the control bolt comprises a first guide for guiding a guiding member of the firing pin, said first guide being configured to move, upon rotation of the switch handle, the firing pin in the uncocked position and engage the firing pin lock with the first notch of the firing pin, and to move, upon pulling the switch handle backwards, the firing pin in the cocked position and engage the firing pin lock with the second notch of the firing pin. a pen-shaped body with a barrel portion comprising a barrel for loading a cartridge; a receiver portion providing a receiver, said receiver housing a firing pin assembly; and a handle portion comprising a switch handle; wherein the firing pin assembly comprises a firing pin housing and a firing pin slidably received with its rear end therein, a control bolt slidably received in the firing pin housing being translationally connected to the firing pin and rotatably connected to the switch handle, and a firing pin lock received in the firing pin housing; wherein the firing pin comprises a first notch for engaging with the firing pin lock, providing a first safety for the firing pin in an uncocked position, and a second notch for engaging with the firing pin lock, providing a second safety for the firing pin in a cocked position; and wherein the control bolt comprises a first guide for guiding a guiding member of the firing pin, said first guide being configured to move, upon rotation of the switch handle, the firing pin in the uncocked position and engage the firing pin lock with the first notch of the firing pin, and to move, upon pulling the switch handle backwards, the firing pin in the cocked position and engage the firing pin lock with the second notch of the firing pin.

Google Patents

https://patents.google.com/patent/US12385717

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12385717