Abstract: A projectile launcher, comprising: an internal tank configured to receive a combustible gas through an inlet, a barrel, a projectile storage portion, a piston, a trigger assembly configured to operate a spool, and a flexible structure configured to wrap around the spool. The flexible structure may be connected to the piston, wherein pulling the trigger assembly causes the spool to rotate to cause the flexible structure to pull the piston forward. The piston may be configured to expand a combustion chamber behind the piston when pulled forward, wherein pulling the trigger assembly causes the combustible gas to enter the combustion chamber created by the piston moving forward. The combustion chamber is configured to collapse after the shot is executed due to a spring bias applied to the piston to a backward position and due to the flexible shaft being released from pulling the piston forward.

Abstract: A projectile launcher, comprising: an internal tank configured to receive a combustible gas through an inlet, a barrel, a projectile storage portion, a piston, a trigger assembly configured to operate a spool, and a flexible structure configured to wrap around the spool. The flexible structure may be connected to the piston, wherein pulling the trigger assembly causes the spool to rotate to cause the flexible structure to pull the piston forward. The piston may be configured to expand a combustion chamber behind the piston when pulled forward, wherein pulling the trigger assembly causes the combustible gas to enter the combustion chamber created by the piston moving forward. Pulling the piston forward loads a projectile into the barrel from the projectile storage portion in response to pulling the trigger.

Abstract: A non-lethal hand grenade having a flexible resilient tube containing a pressurized colored liquid, with a impact actuated trigger device, which overcome the deficiencies of known prior art by offering a reliable, safe, and cost effective device that never fail to goes off when is thrown towards a intended target. The trigger device relies on the flexibility of the tube to keep the device safe to be thrown without going off until a minimal impact happens; The impact actuates a device which releases the trigger cap that keep the resilient tube blocked, allowing the pressurized liquid to be sprayed, marking anyone and anything about twenty feet of the point of impact. This non-reusable grenade is safe, reliable, environmental safe, easy to manufacture and operate, very similar in design and use to a real military grenade.

Abstract: An apparatus to launch projectiles such as paintballs, BBs, grenades, rocket foam and others. The apparatus uses a cordless nailer fuel cell to provide combustible material to a fan-assisted combustion chamber; the combustible is ignited generating energy to propel the projectile out of the apparatus.