| 摘要 |
<p>The blow gun uses compressed air to provide a jet for cleaning away swarf and similar materials. It comprises a body (1) with an air passage (2) leading into a valve chamber, the outlet valve (10) being controlled by an external lever (14). A safety valve (20) closes off the air supply if the outlet becomes obstructed. It comprises a flexible ring (26), its central bore having a taper plug (29) and a coil spring (16, 30) each side. The value chamber is vented (35) to atmosphere to provide balanced operation and in normal use, pressure equilibrium each side.</p> |
