Firearm with gas drive
AssigneeGlock Technology GmbH
InventorsJosef Kroyer, Elmar Bilgeri
Life of this patent
Estimating the term…
Abstract
A firearm including a gas drive, having an annular piston which is displaceably arranged on the barrel to form an expansion chamber between two end positions. At least one gas port penetrates the wall of the barrel in the region of the expansion chamber and a selector is provided. In order to provide a simple and easily adjustable mechanism, the expansion chamber is delimited by a ring surface and an inner cylinder surface of the piston, an end surface of the selector and the barrel. The selector is rotatably arranged on the barrel with at least two predefined rest positions. In each rest position, the gas flow from the expansion chamber is delimitable by at least one selector opening formed on the selector.
Claims22
A firearm, comprising:
- a frame;
- a barrel having a barrel axis, the barrel being fixedly mounted to the frame;
- a barrel extension that is connectable to the barrel;
- a breech having a sliding piece;
- and
- a gas drive configured to act on the sliding piece of the breech via one or more operating rods;
- wherein the gas drive includes:
- a selector, the selector being arranged on the barrel so as to be rotatable about the barrel;
- an annular piston that is displaceably arranged on the barrel between a front resting position and a rear end position and which forms an expansion chamber, the expansion chamber being delimited by a ring surface and an inner cylinder surface of the annular piston, and an end surface of the selector and the barrel;
- where the annular piston is urged in a forward direction by one or more retaining springs;
- and
- at least one gas port defined in a wall of the barrel in a region of the expansion chamber;
- wherein the selector is rotatable about the barrel axis into at least two predefined rest positions, in which for each of the at least two predefined rest positions a gas flow from the expansion chamber into an environment is delimitable by at least one selector opening defined by the selector and a gas outlet channel of the piston.
Dependencies are inferred from the claim text.