DEVICE FOR PRODUCTION OF A FOAMED CONCRETE BY AERATION Russian patent published in 2005 - IPC

FIELD: construction industry; devices for production of a foamed concrete by aeration.

SUBSTANCE: the invention is pertaining to a hand-operated fire small arms and is intended for boosting action of a bullet for a single and automatic fire by standard cartridges, or cartridges with a boosted power, either by silent cartridges, or pulsed jet direct-flow bullets with a standard cartridge, a primer and a powder charge. The aiming device in the pistol is mounted on the mobile barrel for more accurate sighting, at the entry into the cartridge housing there is a deflector, which at a loading excludes a loss or a skew of the cartridge. In the lower part of the cartridge housing the barrel has an elongated bulge, in the middle of which there is a cartridge window for a cartridge passing from the magazine into the barrel housing, and on the end of the bulge there are an ejector and a knock-out tool. Instead of the bulge the barrel may have a plank with a limited motion, the design of which matches to a dilatational bulge for charging a cartridge and discharge of the barrel. The shock-trigger gear with an open trigger ix mounted inside a frame and an under=barrel box, and the trigger - inside a staple, a part of which is spring-loaded. Between the handle and its casing there are return springs for reduction of a recoil force. In the handle a plug-in one-two- box magazine is installed, the upper single-row section of which is placed inside the frame, along which two battle rods of the is shock-trigger gear are passing, and the lower two-row section is intended for increasing the number of cartridges. Changing positions of a two-lever safety catch of a trigger, the toggle of fire, the stoppers of the barrel, the middle safety catch of the hammer, the middle catch of the magazine may be realized by any hand. The invention also differs from its analogs by two methods of a short-time coupling of a mobile barrel with a breech-block, which is constantly connected to a frame since in the barrel cartridge-chamber a cavity (backlash) is formed between a circular outer surface and an inner surface of a cartridge and the barrel cartridge-chamber, which at a shot due to a high-pressure of the powder gases a cartridge wall fills and for a short time joins the barrel and a breech-block. On the side walls of the barrel breech housing there may be symmetrical cross-section flutes, which are coupled with the elastic semi-rings placed in the deep grooves of the breech-block for fixation of the mobile barrel. At a shot, at the high pressure in cohesion of the grooves and the semi-rings the grate friction forces are formed, which hinder compression of the semi-rings and for a short time join the barrel and the breech-block. The invention allows to reduce a recoil force and to increase accuracy of fire.

EFFECT: the invention allows to reduce a recoil force and to increase accuracy of fire.

3 cl, 17 dwg