The spiral ported bolt

F - Mech Eng,Light,Heat,Weapons – 41 – B

Patent

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Details

F41B 11/06 (2006.01) F41A 5/24 (2006.01) F41B 11/00 (2006.01)

Patent

CA 2202795

In a paintball gun the gas charge used to propel the paintball is vented through a bolt. It is common practice to vent the gas in a direction parallel to the direction of travel through one or more holes. In this invention, the bolt instead vents the gas charge through multiple holes at an angle about the centerline. This bolt with the vents arranged in a spiral pattern would induce a spin about the axis of the paintball's direction of travel. This resulting longitudinal rotation would then increase the paintball gun's consistency and accuracy. This would be even more effective in a paintball gun with a rifled barrel because witha conventional bolt the ball will not start to spin until a distance down the barrel due to it's inertia. The spiral ported bolt would induce a spin from the start.

Dans un fusil à balles de peinture, le gaz utilisé pour propulser la balle de peinture est évacué par un verrou. Habituellement, le gaz est évacué dans une direction parallèle à la direction de déplacement et par au moins un orifice. La présente invention permet au verrou d'évacuer le gaz par plusieurs orifices aménagés à un angle déterminé autour de la ligne centrale. Le verrou, qui comporte des orifices d'évacuation disposés en spirale, amorce une rotation autour de l'axe de la direction de déplacement de la balle de peinture. La rotation longitudinale résultante augmente la constance et la précision du fusil à balles de peinture, ce qui est d'autant plus efficace si le fusil est muni d'un canon rayé puisque, dans le cas d'un verrou traditionnel, la balle ne commence pas à tourner avant d'avoir parcouru une certaine distance dans le canon, en raison de sa force d'inertie. Le verrou en spiral porté amorce une rotation dès le début.

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