BODY OF MANUAL ROTARY PNEUMATIC MACHINE Russian patent published in 1994 - IPC

FIELD: mining machinery. SUBSTANCE: body includes motor body 1 with exhaust ports 9 and 10, silencer body 3 embracing body 1 to form silencer working chambers 4-7, handles connected with silencer body. Motor body 1 is connected to silencer body 3 by means of tangentially disposed flexible partitions 2. Each working chamber 4-7 of silencer is formed by outer surface of motor body 1, inner surface of silencer body 3, and, at least, one tangential partition 2 having holes 11 and 13 for communicating working chambers 4-7 with each other. EFFECT: higher efficiency in drilling blast holes. 5 cl, 4 dwg