PNEUMATIC SINGLE-STROKE HAMMER Russian patent published in 1994 - IPC

FIELD: riveting-assembled works. SUBSTANCE: trunk 2 with windows 3 is placed in body 1. The body and the trunk form receiver 4. Hammer head 6 is mounted in the trunk. Handle 7 is set on the body for axial displacement. Air distributor 8 is connected through channel 9 with the pneumatic network, and through channel 11 with the trunk prehead cavity. Receiver 4 is connected with the pneumatic network through channel 10. Valve 13 serves to connect the trunk working cavity with atmosphere. The through cross-section of channel 14 of valve 13 exceeds that of channel 10 for supplying the air to the receiver. Channel 10 is connected with feeding channel 9 till the latter becomes connected with air distributor 8. When handle 7 is shifted to body 1 valve 13 is also shifted. In this case the working cavity is separated from atmosphere. When the air distributor button is pressed, the trunk prehead cavity is connected with atmosphere through channel 11. Through windows 3 the air influences the hammer head which picks up speed and gives a blow. When the button is released the hammer head returns to its initial state and the air from the working cavity escapes into the atmosphere through channel 14 of valve 13. As the cross-section of channel 14 is more than that of channel 10, the air pressure in the working cavity is less than in the prehead one. After the hammer head returns into the initial state windows 3 are overlapped and the pressure in the trunk working cavity becomes equal to the atmospheric one. EFFECT: facilitated manufacture. 1 dwg