Patent ID: 8127755
Filing Date: 2012-03-06
Classification: F41B

Abstract:
1. An air gun for firing bullets using compressed gas, the air gun comprising: a hit pin movable to and between a retracted position and a hit position, the hit pin being resiliently biased towards the retracted position; a piercing assembly capable of fitting a gas canister, being a compressed gas source; a discharge valve, having a gas discharge path, capable of either discharging compressed gas from the gas canister to a chamber or stopping discharge of compressed gas to the chamber; and a partition wall provided between the piercing assembly and the discharge valve, and forming a microscopic hole section, wherein: the discharge valve closes off the gas discharge path due to an urging force of a discharge valve spring, so that a discharge valve chamber is formed between the partition wall and the discharge valve, the discharge valve discharges compressed gas from the gas discharge path by opening the gas discharge path as a result of a pressing force on the discharge valve due to the hit pin moving from the retracted position to the hit position to hit the discharge valve, and a gas volume per unit time that flows from the microscopic hole section of the partition wall into the discharge valve chamber is lower than a gas volume per unit time that flows out from the discharge valve chamber as a result of opening the gas discharge path of the discharge valve.