| 摘要 |
A self-firing and self-propelling gas impulse device (10) which includes a housing (12) having a longitudinal axis (75), a gas inlet port (18a), and on e or more gas discharge ports (20); an inlet chamber (16), arranged for gas communication with a source (100) of compressed gas; a pressurization chambe r (19) arranged for gas communication with the inlet chamber (16), and arrange d for selectable gas communication with the one or more discharge ports (20); and a piston unit (30) arranged along the longitudinal axis (75) between the inlet chamber (16) and the pressurization chamber (19), and selectively movable between a first operative position and a second operative position, whereat in the first position the piston unit (30) prevents gas communicatio n between the pressurization chamber (19) and the one or more discharge ports (20), and whereat in the second position the piston unit (30) is retracted s o as to facilitate gas communication between the pressurization chamber (19) a nd the one or more discharge ports (20), and the piston unit (30) is operative in response to a force differential across the piston unit (30). |
