| 摘要 |
An improved hydroblasting gun having an on/off safety switch system. The on/off switch system comprises at least two actuatable triggers each displacing a specified volume of incompressible fluid which, when coupled with a predetermined volume within an actuator, displaces a piston initiating a signal. In specific application, two separate triggers are depressed displacing a predetermined volume in an actuator adjacent a shut-off valve. Until the actuator fully opens the shut-off valve, hydroblasting operations may not begin. In this manner, the chances of accidental discharge through the depression of a single trigger are eliminated and preferred ergonomical characteristics are provided.
|
