| 摘要 |
FIELD: pneumatic telescopic perforators. ^ SUBSTANCE: in "DISABLED" position of launch valve, piston hollow of pneumatic feeder is connected to atmosphere, for which purpose in launch valve on the side of its tail part, protruding outwardly from the body, on which valve control handle is mounted, channel or groove are made on external working surface of valve, connected to channel in the body, along which compressed air is fed into piston hollow of pneumatic feeder in working positions of launch valve. ^ EFFECT: provision of safety during operation concerning prevention of spontaneous extension of rod of pneumatic feeder under effect of compressed air in disabled position of launch valve due to possible flow of compressed air through launch valve into piston hollow of pneumatic feeder. ^ 4 cl, 5 dwg |
