Contilinka with vacuum pump for long guns (Concept)

[Zahar]

I present to your attention the Contilinka Concept with a vacuum pump for long guns, which allows you to create a vacuum in the barrel between the piston and the firing valve until the harpoon is freely loaded by hand without setting effort when pumping the gun! The concept fits without barrel eccentricity into a 40 mm diameter receiver! VZSM is taken out! O-ring whispered as a spring! The pump stroke of 200 - 250 mm is due to the bending strength of 5 mm of the pump rod during operation! Segment valve pump piston! The shotgun can be operated without a pump!
To use the pump, it is necessary to cock the opening valve and turn the pump rod with the handle to release the pump rod stopper! After reaching the required vacuum in the barrel, the pump rod is brought up to the stop against the muzzle and rotates until the stopper is fixed in the muzzle to prevent
unauthorized extension!

 

[popgun pete]

So is this like a “Mirage”, but instead of pumping down the rear end of the gun and the inner barrel you only have to pump down the inner barrel because the releasing valve shuts off gas in the rest of the gun. For those who are unfamiliar with them releasing valve guns after the shot have gas at the start pressure throughout all the internal spaces in the gun, although the inner barrel is plugged by the releasing valve. When you muzzle load the gun you compress the gas in the inner barrel driving it through a one-way valve in the releasing valve to move it into the gun's tank. The gas cannot come back into the inner barre until you pull the trigger. So this concept pumps down the inner barrel volume transferring air into the gun's tank rather than you pushing on the main barrel piston which with its greater diameter (than the pump rod piston) is much harder to push.

 

[Zahar]

It is possible to increase the length of the Working Stroke of the vacuum pump with the additional support of the pump handle on the harpoon!