Semi-automatic gun

A gun for firing pellets or balls using compressed gas comprising:

• an elongate breech section having a front end and a chamber formed therein;
• a gun handle connected to said breech section;
• a barrel through which said pellets or balls are fired connected to said front end of said breech section;
• a hammer and bolt mechanism including a hammer slidably mounted in said chamber, a bolt slidable between a rear position in said chamber and a forward position at a rear end of said barrel, and connecting apparatus for rigidly connecting said hammer and said bolt, said hammer being slidable from a rear, cocked position to a forward, firing position;
• a spring biasing said hammer and bolt mechanism to the forward position for firing the gun;
• a gas valve system arranged in said chamber in front of said hammer and connectible to a source of compressed gas, said system adapted to release compressed gas into said rear end of the barrel when said hammer and bolt mechanism is released and moves to the forward positions of the hammer and the bolt;
• a trigger movably mounted in said breech section;
• and
• means for releasing said hammer and bolt mechanism when the trigger is pulled, said releasing means including a sear pivotably mounted on a sear pin, said sear being operable by said trigger;
• wherein said connecting apparatus comprises two rigid links positioned on opposite sides of said hammer and bolt, each link being connected to both the hammer and the bolt.

A gun for firing pellets or balls using compressed gas comprising:

• an exterior housing forming at least a rear section of the gun;
• a gun handle and a barrel connected to said housing;
• said barrel being provided for firing pellets or balls therethrough;
• a hammer slidably mounted in said housing and movable from a rearward, cocked position to a forward, firing position;
• a bolt slidably mounted in said housing from a rearward position, where a pellet or ball can enter a rear end of the barrel, to a forward position where the bolt closes said rear end of the barrel;
• connecting apparatus for rigidly connecting said hammer and bolt so that they slide together;
• a spring mounted in said housing and biasing said bolt and said hammer towards said forward positions;
• a gas valve system mounted in said housing in front of said hammer and connectible to a source of compressed gas, said system being capable of releasing compressed gas into the rear end of the barrel when said hammer is released and moves to said firing position;
• a trigger pivotably mounted in said housing and having a sear engaging member slidable therein and means for biasing said sear engaging member to a rearward position;
• means for releasing said bolt and hammer when the trigger is pulled, said releasing means including a sear pivotably mounted on a sear pin and having a rear end, said sear pin being mounted in said housing, and means for biasing said sear so as to pivot said rear end upwardly;
• wherein, when said trigger is pulled, said trigger pulls said rear end of the sear downwardly by means of said sear engaging member, causing both said bolt and hammer to be released and to be driven to the forward positions thereof by said spring.

A gun for firing pellets or balls using compressed gas comprising:

• a breech section having rear and front ends and an elongate chamber formed therein, the length of said chamber extending in a rear to front direction;
• a barrel extending forwardly from said front end;
• a bolt slidably mounted in said breech section and slidable into said barrel in order to close a rear end thereof;
• a gas valve system adapted to release compressed gas into said rear end of the barrel when the gun is fired, said system including a separate, unitary metal housing, at least a major portion of which is mounted within said chamber and rearwardly of said bolt, said housing having a forward gas chamber which is normally sealed to contain the compressed gas and a rearward, sleeve section, an aperture extending between said gas chamber and the sleeve section, and a valve device biased to a rear position to close off said aperture;
• a hammer mounted for sliding movement in said sleeve section, said hammer being slidable to a rear, cocked position;
• a spring mechanism that biases said hammer towards a forward, firing position;
• and
• a trigger operated firing mechanism capable of releasing said hammer towards said forward, firing position;
• wherein said hammer causes said gas valve system to release said compressed gas into the barrel when said hammer reaches the forward, firing position.