US 2002/0170222 A1Published application

Firearm locking device

OwnerJohn S. Alankoinventor

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Abstract

A firearm locking device for blocking the chamber of a firearm rendering it impossible to load a live cartridge into the chamber. The firearm locking device comprises a cylindrical body, having the size and shape of the chamber for the firearm. The firearm locking device has an integral means for diametrical expansion providing a locking interference fit in the chamber and a key activated means for retracting said diametrical expansion to allow removal of the firearm locking device from the chamber. The firearm locking device does not have the external circumferential grooves or ridges required for extraction from the chamber by the extraction mechanism of the firearm thus preventing removal from the chamber except with a key.

Claims10

Dependent claims

1) A firearm locking device which is insertable into the chamber of a firearm, said firearm locking device being generally cylindrical in shape and having general exterior dimensions matching a cartridge designed to fit within said chamber of said firearm and comprising,

a breech end, said breech end having dimensions matching the breech portion of a cartridge designed to fit said chamber of said firearm except lacking means for engaging the cartridge extraction mechanism of said firearm and,
a barrel end, said barrel end having dimensions matching the barrel portion of said cartridge designed to fit said chamber of said firearm and,
a circumferentially variable section between said breech end and said barrel end and,
a key operable mechanism for expanding the circumferential diameter of a said circumferentially variable section to lock said circumferentially variable section to the interior walls of said chamber by interference with said interior walls of said chamber of said firearm and,
a key to operate said key operable mechanism for expanding and retracting said circumferential diameter of said circumferentially variable section.

2 more elements

Dependencies are inferred from the claim text.