PNEUMATIC RIVETING HAMMER Russian patent published in 2004 - IPC

FIELD: manual pneumatic percussion-action tools. SUBSTANCE: hammer includes housing, cylindrical stem with piston arranged in it; air distributing device with pneumatic chamber; pneumatic button and throttle placed in inlet duct. Pneumatic button includes shell with axial stepped opening; in part of said opening having larger diameter sleeve and spring are arranged. Spring rests upon sleeve end and step of stepped opening. Sleeve has threaded connection with pusher passing through less-diameter opening of shell and resting upon leg of mushroom - like valve. Cock is secured to outer end of pusher. Due to rotating cock it is possible to change energy value and frequency of piston percussions. In order to prevent cranking of sleeve together with pusher at rotating cock, flat and bead are formed on outer surface of sleeve; plane of flat is in contact with pin. EFFECT: enhanced operational parameters of hammer. 2 cl, 2 dwg